rtmpproto.c 103 KB
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/*
 * RTMP network protocol
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 * Copyright (c) 2009 Konstantin Shishkov
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 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
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 * @file
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 * RTMP protocol
 */

#include "libavcodec/bytestream.h"
#include "libavutil/avstring.h"
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#include "libavutil/base64.h"
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#include "libavutil/hmac.h"
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#include "libavutil/intfloat.h"
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#include "libavutil/lfg.h"
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#include "libavutil/md5.h"
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#include "libavutil/opt.h"
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#include "libavutil/random_seed.h"
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#include "avformat.h"
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#include "internal.h"
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#include "network.h"

#include "flv.h"
#include "rtmp.h"
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#include "rtmpcrypt.h"
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#include "rtmppkt.h"
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#include "url.h"
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#if CONFIG_ZLIB
#include <zlib.h>
#endif

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#define APP_MAX_LENGTH 1024
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#define PLAYPATH_MAX_LENGTH 512
#define TCURL_MAX_LENGTH 1024
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#define FLASHVER_MAX_LENGTH 64
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#define RTMP_PKTDATA_DEFAULT_SIZE 4096
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#define RTMP_HEADER 11
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/** RTMP protocol handler state */
typedef enum {
    STATE_START,      ///< client has not done anything yet
    STATE_HANDSHAKED, ///< client has performed handshake
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    STATE_FCPUBLISH,  ///< client FCPublishing stream (for output)
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    STATE_PLAYING,    ///< client has started receiving multimedia data from server
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    STATE_SEEKING,    ///< client has started the seek operation. Back on STATE_PLAYING when the time comes
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    STATE_PUBLISHING, ///< client has started sending multimedia data to server (for output)
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    STATE_RECEIVING,  ///< received a publish command (for input)
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    STATE_SENDING,    ///< received a play command (for output)
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    STATE_STOPPED,    ///< the broadcast has been stopped
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} ClientState;

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typedef struct TrackedMethod {
    char *name;
    int id;
} TrackedMethod;

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/** protocol handler context */
typedef struct RTMPContext {
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    const AVClass *class;
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    URLContext*   stream;                     ///< TCP stream used in interactions with RTMP server
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    RTMPPacket    *prev_pkt[2];               ///< packet history used when reading and sending packets ([0] for reading, [1] for writing)
    int           nb_prev_pkt[2];             ///< number of elements in prev_pkt
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    int           in_chunk_size;              ///< size of the chunks incoming RTMP packets are divided into
    int           out_chunk_size;             ///< size of the chunks outgoing RTMP packets are divided into
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    int           is_input;                   ///< input/output flag
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    char          *playpath;                  ///< stream identifier to play (with possible "mp4:" prefix)
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    int           live;                       ///< 0: recorded, -1: live, -2: both
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    char          *app;                       ///< name of application
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    char          *conn;                      ///< append arbitrary AMF data to the Connect message
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    ClientState   state;                      ///< current state
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    int           stream_id;                  ///< ID assigned by the server for the stream
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    uint8_t*      flv_data;                   ///< buffer with data for demuxer
    int           flv_size;                   ///< current buffer size
    int           flv_off;                    ///< number of bytes read from current buffer
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    int           flv_nb_packets;             ///< number of flv packets published
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    RTMPPacket    out_pkt;                    ///< rtmp packet, created from flv a/v or metadata (for output)
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    uint32_t      client_report_size;         ///< number of bytes after which client should report to server
    uint32_t      bytes_read;                 ///< number of bytes read from server
    uint32_t      last_bytes_read;            ///< number of bytes read last reported to server
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    uint32_t      last_timestamp;             ///< last timestamp received in a packet
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    int           skip_bytes;                 ///< number of bytes to skip from the input FLV stream in the next write call
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    int           has_audio;                  ///< presence of audio data
    int           has_video;                  ///< presence of video data
    int           received_metadata;          ///< Indicates if we have received metadata about the streams
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    uint8_t       flv_header[RTMP_HEADER];    ///< partial incoming flv packet header
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    int           flv_header_bytes;           ///< number of initialized bytes in flv_header
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    int           nb_invokes;                 ///< keeps track of invoke messages
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    char*         tcurl;                      ///< url of the target stream
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    char*         flashver;                   ///< version of the flash plugin
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    char*         swfhash;                    ///< SHA256 hash of the decompressed SWF file (32 bytes)
    int           swfhash_len;                ///< length of the SHA256 hash
    int           swfsize;                    ///< size of the decompressed SWF file
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    char*         swfurl;                     ///< url of the swf player
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    char*         swfverify;                  ///< URL to player swf file, compute hash/size automatically
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    char          swfverification[42];        ///< hash of the SWF verification
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    char*         pageurl;                    ///< url of the web page
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    char*         subscribe;                  ///< name of live stream to subscribe
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    int           server_bw;                  ///< server bandwidth
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    int           client_buffer_time;         ///< client buffer time in ms
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    int           flush_interval;             ///< number of packets flushed in the same request (RTMPT only)
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    int           encrypted;                  ///< use an encrypted connection (RTMPE only)
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    TrackedMethod*tracked_methods;            ///< tracked methods buffer
    int           nb_tracked_methods;         ///< number of tracked methods
    int           tracked_methods_size;       ///< size of the tracked methods buffer
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    int           listen;                     ///< listen mode flag
    int           listen_timeout;             ///< listen timeout to wait for new connections
    int           nb_streamid;                ///< The next stream id to return on createStream calls
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    double        duration;                   ///< Duration of the stream in seconds as returned by the server (only valid if non-zero)
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    char          username[50];
    char          password[50];
    char          auth_params[500];
    int           do_reconnect;
    int           auth_tried;
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} RTMPContext;

#define PLAYER_KEY_OPEN_PART_LEN 30   ///< length of partial key used for first client digest signing
/** Client key used for digest signing */
static const uint8_t rtmp_player_key[] = {
    'G', 'e', 'n', 'u', 'i', 'n', 'e', ' ', 'A', 'd', 'o', 'b', 'e', ' ',
    'F', 'l', 'a', 's', 'h', ' ', 'P', 'l', 'a', 'y', 'e', 'r', ' ', '0', '0', '1',

    0xF0, 0xEE, 0xC2, 0x4A, 0x80, 0x68, 0xBE, 0xE8, 0x2E, 0x00, 0xD0, 0xD1, 0x02,
    0x9E, 0x7E, 0x57, 0x6E, 0xEC, 0x5D, 0x2D, 0x29, 0x80, 0x6F, 0xAB, 0x93, 0xB8,
    0xE6, 0x36, 0xCF, 0xEB, 0x31, 0xAE
};

#define SERVER_KEY_OPEN_PART_LEN 36   ///< length of partial key used for first server digest signing
/** Key used for RTMP server digest signing */
static const uint8_t rtmp_server_key[] = {
    'G', 'e', 'n', 'u', 'i', 'n', 'e', ' ', 'A', 'd', 'o', 'b', 'e', ' ',
    'F', 'l', 'a', 's', 'h', ' ', 'M', 'e', 'd', 'i', 'a', ' ',
    'S', 'e', 'r', 'v', 'e', 'r', ' ', '0', '0', '1',

    0xF0, 0xEE, 0xC2, 0x4A, 0x80, 0x68, 0xBE, 0xE8, 0x2E, 0x00, 0xD0, 0xD1, 0x02,
    0x9E, 0x7E, 0x57, 0x6E, 0xEC, 0x5D, 0x2D, 0x29, 0x80, 0x6F, 0xAB, 0x93, 0xB8,
    0xE6, 0x36, 0xCF, 0xEB, 0x31, 0xAE
};

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static int handle_chunk_size(URLContext *s, RTMPPacket *pkt);

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static int add_tracked_method(RTMPContext *rt, const char *name, int id)
{
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    int err;
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    if (rt->nb_tracked_methods + 1 > rt->tracked_methods_size) {
        rt->tracked_methods_size = (rt->nb_tracked_methods + 1) * 2;
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        if ((err = av_reallocp(&rt->tracked_methods, rt->tracked_methods_size *
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                               sizeof(*rt->tracked_methods))) < 0) {
            rt->nb_tracked_methods = 0;
            rt->tracked_methods_size = 0;
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            return err;
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        }
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    }

    rt->tracked_methods[rt->nb_tracked_methods].name = av_strdup(name);
    if (!rt->tracked_methods[rt->nb_tracked_methods].name)
        return AVERROR(ENOMEM);
    rt->tracked_methods[rt->nb_tracked_methods].id = id;
    rt->nb_tracked_methods++;

    return 0;
}

static void del_tracked_method(RTMPContext *rt, int index)
{
    memmove(&rt->tracked_methods[index], &rt->tracked_methods[index + 1],
            sizeof(*rt->tracked_methods) * (rt->nb_tracked_methods - index - 1));
    rt->nb_tracked_methods--;
}

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static int find_tracked_method(URLContext *s, RTMPPacket *pkt, int offset,
                               char **tracked_method)
{
    RTMPContext *rt = s->priv_data;
    GetByteContext gbc;
    double pkt_id;
    int ret;
    int i;

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    bytestream2_init(&gbc, pkt->data + offset, pkt->size - offset);
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    if ((ret = ff_amf_read_number(&gbc, &pkt_id)) < 0)
        return ret;

    for (i = 0; i < rt->nb_tracked_methods; i++) {
        if (rt->tracked_methods[i].id != pkt_id)
            continue;

        *tracked_method = rt->tracked_methods[i].name;
        del_tracked_method(rt, i);
        break;
    }

    return 0;
}

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static void free_tracked_methods(RTMPContext *rt)
{
    int i;

    for (i = 0; i < rt->nb_tracked_methods; i ++)
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        av_freep(&rt->tracked_methods[i].name);
    av_freep(&rt->tracked_methods);
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    rt->tracked_methods_size = 0;
    rt->nb_tracked_methods   = 0;
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}

static int rtmp_send_packet(RTMPContext *rt, RTMPPacket *pkt, int track)
{
    int ret;

    if (pkt->type == RTMP_PT_INVOKE && track) {
        GetByteContext gbc;
        char name[128];
        double pkt_id;
        int len;

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        bytestream2_init(&gbc, pkt->data, pkt->size);
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        if ((ret = ff_amf_read_string(&gbc, name, sizeof(name), &len)) < 0)
            goto fail;

        if ((ret = ff_amf_read_number(&gbc, &pkt_id)) < 0)
            goto fail;

        if ((ret = add_tracked_method(rt, name, pkt_id)) < 0)
            goto fail;
    }

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    ret = ff_rtmp_packet_write(rt->stream, pkt, rt->out_chunk_size,
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                               &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
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fail:
    ff_rtmp_packet_destroy(pkt);
    return ret;
}

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static int rtmp_write_amf_data(URLContext *s, char *param, uint8_t **p)
{
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    char *field, *value;
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    char type;

    /* The type must be B for Boolean, N for number, S for string, O for
     * object, or Z for null. For Booleans the data must be either 0 or 1 for
     * FALSE or TRUE, respectively. Likewise for Objects the data must be
     * 0 or 1 to end or begin an object, respectively. Data items in subobjects
     * may be named, by prefixing the type with 'N' and specifying the name
     * before the value (ie. NB:myFlag:1). This option may be used multiple times
     * to construct arbitrary AMF sequences. */
    if (param[0] && param[1] == ':') {
        type = param[0];
        value = param + 2;
    } else if (param[0] == 'N' && param[1] && param[2] == ':') {
        type = param[1];
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        field = param + 3;
        value = strchr(field, ':');
        if (!value)
            goto fail;
        *value = '\0';
        value++;
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        ff_amf_write_field_name(p, field);
    } else {
        goto fail;
    }

    switch (type) {
    case 'B':
        ff_amf_write_bool(p, value[0] != '0');
        break;
    case 'S':
        ff_amf_write_string(p, value);
        break;
    case 'N':
        ff_amf_write_number(p, strtod(value, NULL));
        break;
    case 'Z':
        ff_amf_write_null(p);
        break;
    case 'O':
        if (value[0] != '0')
            ff_amf_write_object_start(p);
        else
            ff_amf_write_object_end(p);
        break;
    default:
        goto fail;
        break;
    }

    return 0;

fail:
    av_log(s, AV_LOG_ERROR, "Invalid AMF parameter: %s\n", param);
    return AVERROR(EINVAL);
}

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/**
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 * Generate 'connect' call and send it to the server.
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 */
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static int gen_connect(URLContext *s, RTMPContext *rt)
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{
    RTMPPacket pkt;
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    uint8_t *p;
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    int ret;

    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
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                                     0, 4096 + APP_MAX_LENGTH)) < 0)
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        return ret;
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    p = pkt.data;

    ff_amf_write_string(&p, "connect");
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    ff_amf_write_number(&p, ++rt->nb_invokes);
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    ff_amf_write_object_start(&p);
    ff_amf_write_field_name(&p, "app");
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    ff_amf_write_string2(&p, rt->app, rt->auth_params);
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    if (!rt->is_input) {
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        ff_amf_write_field_name(&p, "type");
        ff_amf_write_string(&p, "nonprivate");
    }
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    ff_amf_write_field_name(&p, "flashVer");
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    ff_amf_write_string(&p, rt->flashver);
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    if (rt->swfurl) {
        ff_amf_write_field_name(&p, "swfUrl");
        ff_amf_write_string(&p, rt->swfurl);
    }

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    ff_amf_write_field_name(&p, "tcUrl");
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    ff_amf_write_string2(&p, rt->tcurl, rt->auth_params);
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    if (rt->is_input) {
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        ff_amf_write_field_name(&p, "fpad");
        ff_amf_write_bool(&p, 0);
        ff_amf_write_field_name(&p, "capabilities");
        ff_amf_write_number(&p, 15.0);
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        /* Tell the server we support all the audio codecs except
         * SUPPORT_SND_INTEL (0x0008) and SUPPORT_SND_UNUSED (0x0010)
         * which are unused in the RTMP protocol implementation. */
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        ff_amf_write_field_name(&p, "audioCodecs");
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        ff_amf_write_number(&p, 4071.0);
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        ff_amf_write_field_name(&p, "videoCodecs");
        ff_amf_write_number(&p, 252.0);
        ff_amf_write_field_name(&p, "videoFunction");
        ff_amf_write_number(&p, 1.0);
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        if (rt->pageurl) {
            ff_amf_write_field_name(&p, "pageUrl");
            ff_amf_write_string(&p, rt->pageurl);
        }
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    }
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    ff_amf_write_object_end(&p);

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    if (rt->conn) {
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        char *param = rt->conn;
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        // Write arbitrary AMF data to the Connect message.
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        while (param) {
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            char *sep;
            param += strspn(param, " ");
            if (!*param)
                break;
            sep = strchr(param, ' ');
            if (sep)
                *sep = '\0';
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            if ((ret = rtmp_write_amf_data(s, param, &p)) < 0) {
                // Invalid AMF parameter.
                ff_rtmp_packet_destroy(&pkt);
                return ret;
            }

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            if (sep)
                param = sep + 1;
            else
                break;
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        }
    }

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    pkt.size = p - pkt.data;
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    return rtmp_send_packet(rt, &pkt, 1);
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}

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static int read_connect(URLContext *s, RTMPContext *rt)
{
    RTMPPacket pkt = { 0 };
    uint8_t *p;
    const uint8_t *cp;
    int ret;
    char command[64];
    int stringlen;
    double seqnum;
    uint8_t tmpstr[256];
    GetByteContext gbc;

    if ((ret = ff_rtmp_packet_read(rt->stream, &pkt, rt->in_chunk_size,
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                                   &rt->prev_pkt[0], &rt->nb_prev_pkt[0])) < 0)
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        return ret;
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    if (pkt.type == RTMP_PT_CHUNK_SIZE) {
        if ((ret = handle_chunk_size(s, &pkt)) < 0)
            return ret;

        ff_rtmp_packet_destroy(&pkt);
        if ((ret = ff_rtmp_packet_read(rt->stream, &pkt, rt->in_chunk_size,
                                       &rt->prev_pkt[0], &rt->nb_prev_pkt[0])) < 0)
            return ret;
    }

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    cp = pkt.data;
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    bytestream2_init(&gbc, cp, pkt.size);
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    if (ff_amf_read_string(&gbc, command, sizeof(command), &stringlen)) {
        av_log(s, AV_LOG_ERROR, "Unable to read command string\n");
        ff_rtmp_packet_destroy(&pkt);
        return AVERROR_INVALIDDATA;
    }
    if (strcmp(command, "connect")) {
        av_log(s, AV_LOG_ERROR, "Expecting connect, got %s\n", command);
        ff_rtmp_packet_destroy(&pkt);
        return AVERROR_INVALIDDATA;
    }
    ret = ff_amf_read_number(&gbc, &seqnum);
    if (ret)
        av_log(s, AV_LOG_WARNING, "SeqNum not found\n");
    /* Here one could parse an AMF Object with data as flashVers and others. */
    ret = ff_amf_get_field_value(gbc.buffer,
                                 gbc.buffer + bytestream2_get_bytes_left(&gbc),
                                 "app", tmpstr, sizeof(tmpstr));
    if (ret)
        av_log(s, AV_LOG_WARNING, "App field not found in connect\n");
    if (!ret && strcmp(tmpstr, rt->app))
        av_log(s, AV_LOG_WARNING, "App field don't match up: %s <-> %s\n",
               tmpstr, rt->app);
    ff_rtmp_packet_destroy(&pkt);

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    // Send Window Acknowledgement Size (as defined in specification)
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    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL,
                                     RTMP_PT_SERVER_BW, 0, 4)) < 0)
        return ret;
    p = pkt.data;
    bytestream_put_be32(&p, rt->server_bw);
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    pkt.size = p - pkt.data;
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    ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
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                               &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
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    ff_rtmp_packet_destroy(&pkt);
    if (ret < 0)
        return ret;
    // Send Peer Bandwidth
    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL,
                                     RTMP_PT_CLIENT_BW, 0, 5)) < 0)
        return ret;
    p = pkt.data;
    bytestream_put_be32(&p, rt->server_bw);
    bytestream_put_byte(&p, 2); // dynamic
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    pkt.size = p - pkt.data;
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    ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
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                               &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
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    ff_rtmp_packet_destroy(&pkt);
    if (ret < 0)
        return ret;

    // Ping request
    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL,
                                     RTMP_PT_PING, 0, 6)) < 0)
        return ret;

    p = pkt.data;
    bytestream_put_be16(&p, 0); // 0 -> Stream Begin
    bytestream_put_be32(&p, 0);
    ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
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                               &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
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    ff_rtmp_packet_destroy(&pkt);
    if (ret < 0)
        return ret;

    // Chunk size
    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL,
                                     RTMP_PT_CHUNK_SIZE, 0, 4)) < 0)
        return ret;

    p = pkt.data;
    bytestream_put_be32(&p, rt->out_chunk_size);
    ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
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                               &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
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    ff_rtmp_packet_destroy(&pkt);
    if (ret < 0)
        return ret;

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    // Send _result NetConnection.Connect.Success to connect
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    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL,
                                     RTMP_PT_INVOKE, 0,
                                     RTMP_PKTDATA_DEFAULT_SIZE)) < 0)
        return ret;

    p = pkt.data;
    ff_amf_write_string(&p, "_result");
    ff_amf_write_number(&p, seqnum);

    ff_amf_write_object_start(&p);
    ff_amf_write_field_name(&p, "fmsVer");
    ff_amf_write_string(&p, "FMS/3,0,1,123");
    ff_amf_write_field_name(&p, "capabilities");
    ff_amf_write_number(&p, 31);
    ff_amf_write_object_end(&p);

    ff_amf_write_object_start(&p);
    ff_amf_write_field_name(&p, "level");
    ff_amf_write_string(&p, "status");
    ff_amf_write_field_name(&p, "code");
    ff_amf_write_string(&p, "NetConnection.Connect.Success");
    ff_amf_write_field_name(&p, "description");
    ff_amf_write_string(&p, "Connection succeeded.");
    ff_amf_write_field_name(&p, "objectEncoding");
    ff_amf_write_number(&p, 0);
    ff_amf_write_object_end(&p);

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    pkt.size = p - pkt.data;
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    ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
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                               &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
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    ff_rtmp_packet_destroy(&pkt);
    if (ret < 0)
        return ret;

    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL,
                                     RTMP_PT_INVOKE, 0, 30)) < 0)
        return ret;
    p = pkt.data;
    ff_amf_write_string(&p, "onBWDone");
    ff_amf_write_number(&p, 0);
    ff_amf_write_null(&p);
    ff_amf_write_number(&p, 8192);
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    pkt.size = p - pkt.data;
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    ret = ff_rtmp_packet_write(rt->stream, &pkt, rt->out_chunk_size,
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                               &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
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    ff_rtmp_packet_destroy(&pkt);

    return ret;
}

558
/**
559
 * Generate 'releaseStream' call and send it to the server. It should make
560 561
 * the server release some channel for media streams.
 */
562
static int gen_release_stream(URLContext *s, RTMPContext *rt)
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{
    RTMPPacket pkt;
    uint8_t *p;
566
    int ret;
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    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
                                     0, 29 + strlen(rt->playpath))) < 0)
        return ret;
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    av_log(s, AV_LOG_DEBUG, "Releasing stream...\n");
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    p = pkt.data;
    ff_amf_write_string(&p, "releaseStream");
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    ff_amf_write_number(&p, ++rt->nb_invokes);
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    ff_amf_write_null(&p);
    ff_amf_write_string(&p, rt->playpath);

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    return rtmp_send_packet(rt, &pkt, 1);
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}

/**
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 * Generate 'FCPublish' call and send it to the server. It should make
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 * the server prepare for receiving media streams.
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 */
586
static int gen_fcpublish_stream(URLContext *s, RTMPContext *rt)
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{
    RTMPPacket pkt;
    uint8_t *p;
590
    int ret;
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    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
                                     0, 25 + strlen(rt->playpath))) < 0)
        return ret;
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596
    av_log(s, AV_LOG_DEBUG, "FCPublish stream...\n");
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    p = pkt.data;
    ff_amf_write_string(&p, "FCPublish");
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    ff_amf_write_number(&p, ++rt->nb_invokes);
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    ff_amf_write_null(&p);
    ff_amf_write_string(&p, rt->playpath);

603
    return rtmp_send_packet(rt, &pkt, 1);
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}

/**
607
 * Generate 'FCUnpublish' call and send it to the server. It should make
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 * the server destroy stream.
 */
610
static int gen_fcunpublish_stream(URLContext *s, RTMPContext *rt)
611 612 613
{
    RTMPPacket pkt;
    uint8_t *p;
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    int ret;
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    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
                                     0, 27 + strlen(rt->playpath))) < 0)
        return ret;
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    av_log(s, AV_LOG_DEBUG, "UnPublishing stream...\n");
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    p = pkt.data;
    ff_amf_write_string(&p, "FCUnpublish");
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    ff_amf_write_number(&p, ++rt->nb_invokes);
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    ff_amf_write_null(&p);
    ff_amf_write_string(&p, rt->playpath);

627
    return rtmp_send_packet(rt, &pkt, 0);
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}

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/**
631
 * Generate 'createStream' call and send it to the server. It should make
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 * the server allocate some channel for media streams.
 */
634
static int gen_create_stream(URLContext *s, RTMPContext *rt)
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{
    RTMPPacket pkt;
    uint8_t *p;
638
    int ret;
639

640
    av_log(s, AV_LOG_DEBUG, "Creating stream...\n");
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    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
                                     0, 25)) < 0)
        return ret;
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    p = pkt.data;
    ff_amf_write_string(&p, "createStream");
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    ff_amf_write_number(&p, ++rt->nb_invokes);
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    ff_amf_write_null(&p);

651
    return rtmp_send_packet(rt, &pkt, 1);
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}


/**
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 * Generate 'deleteStream' call and send it to the server. It should make
657 658
 * the server remove some channel for media streams.
 */
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static int gen_delete_stream(URLContext *s, RTMPContext *rt)
660 661 662
{
    RTMPPacket pkt;
    uint8_t *p;
663
    int ret;
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665
    av_log(s, AV_LOG_DEBUG, "Deleting stream...\n");
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    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
                                     0, 34)) < 0)
        return ret;
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    p = pkt.data;
    ff_amf_write_string(&p, "deleteStream");
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    ff_amf_write_number(&p, ++rt->nb_invokes);
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    ff_amf_write_null(&p);
675
    ff_amf_write_number(&p, rt->stream_id);
676

677
    return rtmp_send_packet(rt, &pkt, 0);
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}

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/**
 * Generate 'getStreamLength' call and send it to the server. If the server
 * knows the duration of the selected stream, it will reply with the duration
 * in seconds.
 */
static int gen_get_stream_length(URLContext *s, RTMPContext *rt)
{
    RTMPPacket pkt;
    uint8_t *p;
    int ret;

    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SOURCE_CHANNEL, RTMP_PT_INVOKE,
                                     0, 31 + strlen(rt->playpath))) < 0)
        return ret;

    p = pkt.data;
    ff_amf_write_string(&p, "getStreamLength");
    ff_amf_write_number(&p, ++rt->nb_invokes);
    ff_amf_write_null(&p);
    ff_amf_write_string(&p, rt->playpath);

    return rtmp_send_packet(rt, &pkt, 1);
}

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/**
 * Generate client buffer time and send it to the server.
 */
static int gen_buffer_time(URLContext *s, RTMPContext *rt)
{
    RTMPPacket pkt;
    uint8_t *p;
    int ret;

    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_PING,
                                     1, 10)) < 0)
        return ret;

    p = pkt.data;
    bytestream_put_be16(&p, 3);
719
    bytestream_put_be32(&p, rt->stream_id);
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    bytestream_put_be32(&p, rt->client_buffer_time);

722
    return rtmp_send_packet(rt, &pkt, 0);
723 724
}

725
/**
726
 * Generate 'play' call and send it to the server, then ping the server
727 728
 * to start actual playing.
 */
729
static int gen_play(URLContext *s, RTMPContext *rt)
730 731 732
{
    RTMPPacket pkt;
    uint8_t *p;
733
    int ret;
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735
    av_log(s, AV_LOG_DEBUG, "Sending play command for '%s'\n", rt->playpath);
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737
    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SOURCE_CHANNEL, RTMP_PT_INVOKE,
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                                     0, 29 + strlen(rt->playpath))) < 0)
        return ret;

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    pkt.extra = rt->stream_id;
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    p = pkt.data;
    ff_amf_write_string(&p, "play");
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    ff_amf_write_number(&p, ++rt->nb_invokes);
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    ff_amf_write_null(&p);
    ff_amf_write_string(&p, rt->playpath);
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    ff_amf_write_number(&p, rt->live * 1000);
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750
    return rtmp_send_packet(rt, &pkt, 1);
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}

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static int gen_seek(URLContext *s, RTMPContext *rt, int64_t timestamp)
{
    RTMPPacket pkt;
    uint8_t *p;
    int ret;

759 760
    av_log(s, AV_LOG_DEBUG, "Sending seek command for timestamp %"PRId64"\n",
           timestamp);
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    if ((ret = ff_rtmp_packet_create(&pkt, 3, RTMP_PT_INVOKE, 0, 26)) < 0)
        return ret;

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    pkt.extra = rt->stream_id;
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    p = pkt.data;
    ff_amf_write_string(&p, "seek");
    ff_amf_write_number(&p, 0); //no tracking back responses
    ff_amf_write_null(&p); //as usual, the first null param
    ff_amf_write_number(&p, timestamp); //where we want to jump

    return rtmp_send_packet(rt, &pkt, 1);
}

776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802
/**
 * Generate a pause packet that either pauses or unpauses the current stream.
 */
static int gen_pause(URLContext *s, RTMPContext *rt, int pause, uint32_t timestamp)
{
    RTMPPacket pkt;
    uint8_t *p;
    int ret;

    av_log(s, AV_LOG_DEBUG, "Sending pause command for timestamp %d\n",
           timestamp);

    if ((ret = ff_rtmp_packet_create(&pkt, 3, RTMP_PT_INVOKE, 0, 29)) < 0)
        return ret;

    pkt.extra = rt->stream_id;

    p = pkt.data;
    ff_amf_write_string(&p, "pause");
    ff_amf_write_number(&p, 0); //no tracking back responses
    ff_amf_write_null(&p); //as usual, the first null param
    ff_amf_write_bool(&p, pause); // pause or unpause
    ff_amf_write_number(&p, timestamp); //where we pause the stream

    return rtmp_send_packet(rt, &pkt, 1);
}

803
/**
804
 * Generate 'publish' call and send it to the server.
805
 */
806
static int gen_publish(URLContext *s, RTMPContext *rt)
807 808 809
{
    RTMPPacket pkt;
    uint8_t *p;
810
    int ret;
811

812
    av_log(s, AV_LOG_DEBUG, "Sending publish command for '%s'\n", rt->playpath);
813 814 815 816 817

    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SOURCE_CHANNEL, RTMP_PT_INVOKE,
                                     0, 30 + strlen(rt->playpath))) < 0)
        return ret;

818
    pkt.extra = rt->stream_id;
819 820 821

    p = pkt.data;
    ff_amf_write_string(&p, "publish");
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    ff_amf_write_number(&p, ++rt->nb_invokes);
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    ff_amf_write_null(&p);
    ff_amf_write_string(&p, rt->playpath);
    ff_amf_write_string(&p, "live");

827
    return rtmp_send_packet(rt, &pkt, 1);
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}

830
/**
831
 * Generate ping reply and send it to the server.
832
 */
833
static int gen_pong(URLContext *s, RTMPContext *rt, RTMPPacket *ppkt)
834 835 836
{
    RTMPPacket pkt;
    uint8_t *p;
837 838
    int ret;

839
    if (ppkt->size < 6) {
840
        av_log(s, AV_LOG_ERROR, "Too short ping packet (%d)\n",
841
               ppkt->size);
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        return AVERROR_INVALIDDATA;
    }

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    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_PING,
                                     ppkt->timestamp + 1, 6)) < 0)
        return ret;
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    p = pkt.data;
    bytestream_put_be16(&p, 7);
851
    bytestream_put_be32(&p, AV_RB32(ppkt->data+2));
852

853
    return rtmp_send_packet(rt, &pkt, 0);
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}

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/**
 * Generate SWF verification message and send it to the server.
 */
static int gen_swf_verification(URLContext *s, RTMPContext *rt)
{
    RTMPPacket pkt;
    uint8_t *p;
    int ret;

    av_log(s, AV_LOG_DEBUG, "Sending SWF verification...\n");
    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_PING,
                                     0, 44)) < 0)
        return ret;

    p = pkt.data;
    bytestream_put_be16(&p, 27);
    memcpy(p, rt->swfverification, 42);

    return rtmp_send_packet(rt, &pkt, 0);
}

877 878 879
/**
 * Generate server bandwidth message and send it to the server.
 */
880
static int gen_server_bw(URLContext *s, RTMPContext *rt)
881 882 883
{
    RTMPPacket pkt;
    uint8_t *p;
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    int ret;

    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_SERVER_BW,
                                     0, 4)) < 0)
        return ret;
889 890

    p = pkt.data;
891
    bytestream_put_be32(&p, rt->server_bw);
892

893
    return rtmp_send_packet(rt, &pkt, 0);
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}

896 897 898
/**
 * Generate check bandwidth message and send it to the server.
 */
899
static int gen_check_bw(URLContext *s, RTMPContext *rt)
900 901 902
{
    RTMPPacket pkt;
    uint8_t *p;
903
    int ret;
904

905 906 907
    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
                                     0, 21)) < 0)
        return ret;
908 909 910

    p = pkt.data;
    ff_amf_write_string(&p, "_checkbw");
911
    ff_amf_write_number(&p, ++rt->nb_invokes);
912 913
    ff_amf_write_null(&p);

914
    return rtmp_send_packet(rt, &pkt, 1);
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}

917
/**
918
 * Generate report on bytes read so far and send it to the server.
919
 */
920
static int gen_bytes_read(URLContext *s, RTMPContext *rt, uint32_t ts)
921 922 923
{
    RTMPPacket pkt;
    uint8_t *p;
924 925 926 927 928
    int ret;

    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_NETWORK_CHANNEL, RTMP_PT_BYTES_READ,
                                     ts, 4)) < 0)
        return ret;
929 930 931

    p = pkt.data;
    bytestream_put_be32(&p, rt->bytes_read);
932

933
    return rtmp_send_packet(rt, &pkt, 0);
934 935
}

936 937
static int gen_fcsubscribe_stream(URLContext *s, RTMPContext *rt,
                                  const char *subscribe)
938 939 940 941 942 943
{
    RTMPPacket pkt;
    uint8_t *p;
    int ret;

    if ((ret = ff_rtmp_packet_create(&pkt, RTMP_SYSTEM_CHANNEL, RTMP_PT_INVOKE,
944
                                     0, 27 + strlen(subscribe))) < 0)
945 946 947 948 949 950
        return ret;

    p = pkt.data;
    ff_amf_write_string(&p, "FCSubscribe");
    ff_amf_write_number(&p, ++rt->nb_invokes);
    ff_amf_write_null(&p);
951
    ff_amf_write_string(&p, subscribe);
952

953
    return rtmp_send_packet(rt, &pkt, 1);
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}

956 957
int ff_rtmp_calc_digest(const uint8_t *src, int len, int gap,
                        const uint8_t *key, int keylen, uint8_t *dst)
958
{
959
    AVHMAC *hmac;
960

961 962
    hmac = av_hmac_alloc(AV_HMAC_SHA256);
    if (!hmac)
963
        return AVERROR(ENOMEM);
964

965
    av_hmac_init(hmac, key, keylen);
966
    if (gap <= 0) {
967
        av_hmac_update(hmac, src, len);
968
    } else { //skip 32 bytes used for storing digest
969 970
        av_hmac_update(hmac, src, gap);
        av_hmac_update(hmac, src + gap + 32, len - gap - 32);
971
    }
972
    av_hmac_final(hmac, dst, 32);
973

974
    av_hmac_free(hmac);
975 976

    return 0;
977 978
}

979 980 981 982 983 984 985 986 987 988 989 990
int ff_rtmp_calc_digest_pos(const uint8_t *buf, int off, int mod_val,
                            int add_val)
{
    int i, digest_pos = 0;

    for (i = 0; i < 4; i++)
        digest_pos += buf[i + off];
    digest_pos = digest_pos % mod_val + add_val;

    return digest_pos;
}

991
/**
992
 * Put HMAC-SHA2 digest of packet data (except for the bytes where this digest
993 994 995
 * will be stored) into that packet.
 *
 * @param buf handshake data (1536 bytes)
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996
 * @param encrypted use an encrypted connection (RTMPE)
997 998
 * @return offset to the digest inside input data
 */
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static int rtmp_handshake_imprint_with_digest(uint8_t *buf, int encrypted)
1000
{
1001
    int ret, digest_pos;
1002

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    if (encrypted)
        digest_pos = ff_rtmp_calc_digest_pos(buf, 772, 728, 776);
    else
        digest_pos = ff_rtmp_calc_digest_pos(buf, 8, 728, 12);
1007

1008 1009 1010
    ret = ff_rtmp_calc_digest(buf, RTMP_HANDSHAKE_PACKET_SIZE, digest_pos,
                              rtmp_player_key, PLAYER_KEY_OPEN_PART_LEN,
                              buf + digest_pos);
1011 1012 1013
    if (ret < 0)
        return ret;

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    return digest_pos;
}

/**
1018
 * Verify that the received server response has the expected digest value.
1019 1020 1021 1022 1023 1024 1025 1026
 *
 * @param buf handshake data received from the server (1536 bytes)
 * @param off position to search digest offset from
 * @return 0 if digest is valid, digest position otherwise
 */
static int rtmp_validate_digest(uint8_t *buf, int off)
{
    uint8_t digest[32];
1027
    int ret, digest_pos;
1028

1029
    digest_pos = ff_rtmp_calc_digest_pos(buf, off, 728, off + 4);
1030

1031 1032 1033
    ret = ff_rtmp_calc_digest(buf, RTMP_HANDSHAKE_PACKET_SIZE, digest_pos,
                              rtmp_server_key, SERVER_KEY_OPEN_PART_LEN,
                              digest);
1034 1035 1036
    if (ret < 0)
        return ret;

1037 1038 1039 1040 1041
    if (!memcmp(digest, buf + digest_pos, 32))
        return digest_pos;
    return 0;
}

1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065
static int rtmp_calc_swf_verification(URLContext *s, RTMPContext *rt,
                                      uint8_t *buf)
{
    uint8_t *p;
    int ret;

    if (rt->swfhash_len != 32) {
        av_log(s, AV_LOG_ERROR,
               "Hash of the decompressed SWF file is not 32 bytes long.\n");
        return AVERROR(EINVAL);
    }

    p = &rt->swfverification[0];
    bytestream_put_byte(&p, 1);
    bytestream_put_byte(&p, 1);
    bytestream_put_be32(&p, rt->swfsize);
    bytestream_put_be32(&p, rt->swfsize);

    if ((ret = ff_rtmp_calc_digest(rt->swfhash, 32, 0, buf, 32, p)) < 0)
        return ret;

    return 0;
}

1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120
#if CONFIG_ZLIB
static int rtmp_uncompress_swfplayer(uint8_t *in_data, int64_t in_size,
                                     uint8_t **out_data, int64_t *out_size)
{
    z_stream zs = { 0 };
    void *ptr;
    int size;
    int ret = 0;

    zs.avail_in = in_size;
    zs.next_in  = in_data;
    ret = inflateInit(&zs);
    if (ret != Z_OK)
        return AVERROR_UNKNOWN;

    do {
        uint8_t tmp_buf[16384];

        zs.avail_out = sizeof(tmp_buf);
        zs.next_out  = tmp_buf;

        ret = inflate(&zs, Z_NO_FLUSH);
        if (ret != Z_OK && ret != Z_STREAM_END) {
            ret = AVERROR_UNKNOWN;
            goto fail;
        }

        size = sizeof(tmp_buf) - zs.avail_out;
        if (!(ptr = av_realloc(*out_data, *out_size + size))) {
            ret = AVERROR(ENOMEM);
            goto fail;
        }
        *out_data = ptr;

        memcpy(*out_data + *out_size, tmp_buf, size);
        *out_size += size;
    } while (zs.avail_out == 0);

fail:
    inflateEnd(&zs);
    return ret;
}
#endif

static int rtmp_calc_swfhash(URLContext *s)
{
    RTMPContext *rt = s->priv_data;
    uint8_t *in_data = NULL, *out_data = NULL, *swfdata;
    int64_t in_size, out_size;
    URLContext *stream;
    char swfhash[32];
    int swfsize;
    int ret = 0;

    /* Get the SWF player file. */
1121 1122
    if ((ret = ffurl_open_whitelist(&stream, rt->swfverify, AVIO_FLAG_READ,
                                    &s->interrupt_callback, NULL,
1123
                                    s->protocol_whitelist, s->protocol_blacklist, s)) < 0) {
1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189
        av_log(s, AV_LOG_ERROR, "Cannot open connection %s.\n", rt->swfverify);
        goto fail;
    }

    if ((in_size = ffurl_seek(stream, 0, AVSEEK_SIZE)) < 0) {
        ret = AVERROR(EIO);
        goto fail;
    }

    if (!(in_data = av_malloc(in_size))) {
        ret = AVERROR(ENOMEM);
        goto fail;
    }

    if ((ret = ffurl_read_complete(stream, in_data, in_size)) < 0)
        goto fail;

    if (in_size < 3) {
        ret = AVERROR_INVALIDDATA;
        goto fail;
    }

    if (!memcmp(in_data, "CWS", 3)) {
        /* Decompress the SWF player file using Zlib. */
        if (!(out_data = av_malloc(8))) {
            ret = AVERROR(ENOMEM);
            goto fail;
        }
        *in_data = 'F'; // magic stuff
        memcpy(out_data, in_data, 8);
        out_size = 8;

#if CONFIG_ZLIB
        if ((ret = rtmp_uncompress_swfplayer(in_data + 8, in_size - 8,
                                             &out_data, &out_size)) < 0)
            goto fail;
#else
        av_log(s, AV_LOG_ERROR,
               "Zlib is required for decompressing the SWF player file.\n");
        ret = AVERROR(EINVAL);
        goto fail;
#endif
        swfsize = out_size;
        swfdata = out_data;
    } else {
        swfsize = in_size;
        swfdata = in_data;
    }

    /* Compute the SHA256 hash of the SWF player file. */
    if ((ret = ff_rtmp_calc_digest(swfdata, swfsize, 0,
                                   "Genuine Adobe Flash Player 001", 30,
                                   swfhash)) < 0)
        goto fail;

    /* Set SWFVerification parameters. */
    av_opt_set_bin(rt, "rtmp_swfhash", swfhash, 32, 0);
    rt->swfsize = swfsize;

fail:
    av_freep(&in_data);
    av_freep(&out_data);
    ffurl_close(stream);
    return ret;
}

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/**
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 * Perform handshake with the server by means of exchanging pseudorandom data
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 * signed with HMAC-SHA2 digest.
 *
 * @return 0 if handshake succeeds, negative value otherwise
 */
static int rtmp_handshake(URLContext *s, RTMPContext *rt)
{
    AVLFG rnd;
    uint8_t tosend    [RTMP_HANDSHAKE_PACKET_SIZE+1] = {
        3,                // unencrypted data
        0, 0, 0, 0,       // client uptime
        RTMP_CLIENT_VER1,
        RTMP_CLIENT_VER2,
        RTMP_CLIENT_VER3,
        RTMP_CLIENT_VER4,
    };
    uint8_t clientdata[RTMP_HANDSHAKE_PACKET_SIZE];
    uint8_t serverdata[RTMP_HANDSHAKE_PACKET_SIZE+1];
    int i;
    int server_pos, client_pos;
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    uint8_t digest[32], signature[32];
    int ret, type = 0;
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    av_log(s, AV_LOG_DEBUG, "Handshaking...\n");
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    av_lfg_init(&rnd, 0xDEADC0DE);
    // generate handshake packet - 1536 bytes of pseudorandom data
    for (i = 9; i <= RTMP_HANDSHAKE_PACKET_SIZE; i++)
        tosend[i] = av_lfg_get(&rnd) >> 24;
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    if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) {
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        /* When the client wants to use RTMPE, we have to change the command
         * byte to 0x06 which means to use encrypted data and we have to set
         * the flash version to at least 9.0.115.0. */
        tosend[0] = 6;
        tosend[5] = 128;
        tosend[6] = 0;
        tosend[7] = 3;
        tosend[8] = 2;

        /* Initialize the Diffie-Hellmann context and generate the public key
         * to send to the server. */
        if ((ret = ff_rtmpe_gen_pub_key(rt->stream, tosend + 1)) < 0)
            return ret;
    }

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    client_pos = rtmp_handshake_imprint_with_digest(tosend + 1, rt->encrypted);
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    if (client_pos < 0)
        return client_pos;
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    if ((ret = ffurl_write(rt->stream, tosend,
                           RTMP_HANDSHAKE_PACKET_SIZE + 1)) < 0) {
        av_log(s, AV_LOG_ERROR, "Cannot write RTMP handshake request\n");
        return ret;
    }

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    if ((ret = ffurl_read_complete(rt->stream, serverdata,
                                   RTMP_HANDSHAKE_PACKET_SIZE + 1)) < 0) {
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        av_log(s, AV_LOG_ERROR, "Cannot read RTMP handshake response\n");
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        return ret;
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    }
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    if ((ret = ffurl_read_complete(rt->stream, clientdata,
                                   RTMP_HANDSHAKE_PACKET_SIZE)) < 0) {
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        av_log(s, AV_LOG_ERROR, "Cannot read RTMP handshake response\n");
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        return ret;
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    }

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    av_log(s, AV_LOG_DEBUG, "Type answer %d\n", serverdata[0]);
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    av_log(s, AV_LOG_DEBUG, "Server version %d.%d.%d.%d\n",
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           serverdata[5], serverdata[6], serverdata[7], serverdata[8]);

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    if (rt->is_input && serverdata[5] >= 3) {
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        server_pos = rtmp_validate_digest(serverdata + 1, 772);
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        if (server_pos < 0)
            return server_pos;

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        if (!server_pos) {
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            type = 1;
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            server_pos = rtmp_validate_digest(serverdata + 1, 8);
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            if (server_pos < 0)
                return server_pos;

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            if (!server_pos) {
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                av_log(s, AV_LOG_ERROR, "Server response validating failed\n");
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                return AVERROR(EIO);
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            }
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        }

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        /* Generate SWFVerification token (SHA256 HMAC hash of decompressed SWF,
         * key are the last 32 bytes of the server handshake. */
        if (rt->swfsize) {
            if ((ret = rtmp_calc_swf_verification(s, rt, serverdata + 1 +
                                                  RTMP_HANDSHAKE_PACKET_SIZE - 32)) < 0)
                return ret;
        }

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        ret = ff_rtmp_calc_digest(tosend + 1 + client_pos, 32, 0,
                                  rtmp_server_key, sizeof(rtmp_server_key),
                                  digest);
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        if (ret < 0)
            return ret;

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        ret = ff_rtmp_calc_digest(clientdata, RTMP_HANDSHAKE_PACKET_SIZE - 32,
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                                  0, digest, 32, signature);
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        if (ret < 0)
            return ret;

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        if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) {
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            /* Compute the shared secret key sent by the server and initialize
             * the RC4 encryption. */
            if ((ret = ff_rtmpe_compute_secret_key(rt->stream, serverdata + 1,
                                                   tosend + 1, type)) < 0)
                return ret;

            /* Encrypt the signature received by the server. */
            ff_rtmpe_encrypt_sig(rt->stream, signature, digest, serverdata[0]);
        }

        if (memcmp(signature, clientdata + RTMP_HANDSHAKE_PACKET_SIZE - 32, 32)) {
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            av_log(s, AV_LOG_ERROR, "Signature mismatch\n");
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            return AVERROR(EIO);
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        }
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        for (i = 0; i < RTMP_HANDSHAKE_PACKET_SIZE; i++)
            tosend[i] = av_lfg_get(&rnd) >> 24;
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        ret = ff_rtmp_calc_digest(serverdata + 1 + server_pos, 32, 0,
                                  rtmp_player_key, sizeof(rtmp_player_key),
                                  digest);
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        if (ret < 0)
            return ret;

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        ret = ff_rtmp_calc_digest(tosend, RTMP_HANDSHAKE_PACKET_SIZE - 32, 0,
                                  digest, 32,
                                  tosend + RTMP_HANDSHAKE_PACKET_SIZE - 32);
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        if (ret < 0)
            return ret;
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        if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) {
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            /* Encrypt the signature to be send to the server. */
            ff_rtmpe_encrypt_sig(rt->stream, tosend +
                                 RTMP_HANDSHAKE_PACKET_SIZE - 32, digest,
                                 serverdata[0]);
        }

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        // write reply back to the server
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        if ((ret = ffurl_write(rt->stream, tosend,
                               RTMP_HANDSHAKE_PACKET_SIZE)) < 0)
            return ret;
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        if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) {
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            /* Set RC4 keys for encryption and update the keystreams. */
            if ((ret = ff_rtmpe_update_keystream(rt->stream)) < 0)
                return ret;
        }
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    } else {
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        if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) {
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            /* Compute the shared secret key sent by the server and initialize
             * the RC4 encryption. */
            if ((ret = ff_rtmpe_compute_secret_key(rt->stream, serverdata + 1,
                            tosend + 1, 1)) < 0)
                return ret;

            if (serverdata[0] == 9) {
                /* Encrypt the signature received by the server. */
                ff_rtmpe_encrypt_sig(rt->stream, signature, digest,
                                     serverdata[0]);
            }
        }

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        if ((ret = ffurl_write(rt->stream, serverdata + 1,
                               RTMP_HANDSHAKE_PACKET_SIZE)) < 0)
            return ret;
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        if (CONFIG_FFRTMPCRYPT_PROTOCOL && rt->encrypted) {
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            /* Set RC4 keys for encryption and update the keystreams. */
            if ((ret = ff_rtmpe_update_keystream(rt->stream)) < 0)
                return ret;
        }
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    }

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    return 0;
}

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static int rtmp_receive_hs_packet(RTMPContext* rt, uint32_t *first_int,
                                  uint32_t *second_int, char *arraydata,
                                  int size)
{
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    int inoutsize;
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    inoutsize = ffurl_read_complete(rt->stream, arraydata,
                                    RTMP_HANDSHAKE_PACKET_SIZE);
    if (inoutsize <= 0)
        return AVERROR(EIO);
    if (inoutsize != RTMP_HANDSHAKE_PACKET_SIZE) {
        av_log(rt, AV_LOG_ERROR, "Erroneous Message size %d"
               " not following standard\n", (int)inoutsize);
        return AVERROR(EINVAL);
    }

    *first_int  = AV_RB32(arraydata);
    *second_int = AV_RB32(arraydata + 4);
    return 0;
}

static int rtmp_send_hs_packet(RTMPContext* rt, uint32_t first_int,
                               uint32_t second_int, char *arraydata, int size)
{
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    int inoutsize;
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    AV_WB32(arraydata, first_int);
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    AV_WB32(arraydata + 4, second_int);
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    inoutsize = ffurl_write(rt->stream, arraydata,
                            RTMP_HANDSHAKE_PACKET_SIZE);
    if (inoutsize != RTMP_HANDSHAKE_PACKET_SIZE) {
        av_log(rt, AV_LOG_ERROR, "Unable to write answer\n");
        return AVERROR(EIO);
    }

    return 0;
}

/**
 * rtmp handshake server side
 */
static int rtmp_server_handshake(URLContext *s, RTMPContext *rt)
{
    uint8_t buffer[RTMP_HANDSHAKE_PACKET_SIZE];
    uint32_t hs_epoch;
    uint32_t hs_my_epoch;
    uint8_t hs_c1[RTMP_HANDSHAKE_PACKET_SIZE];
    uint8_t hs_s1[RTMP_HANDSHAKE_PACKET_SIZE];
    uint32_t zeroes;
    uint32_t temp       = 0;
    int randomidx       = 0;
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    int inoutsize       = 0;
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    int ret;

    inoutsize = ffurl_read_complete(rt->stream, buffer, 1);       // Receive C0
    if (inoutsize <= 0) {
        av_log(s, AV_LOG_ERROR, "Unable to read handshake\n");
        return AVERROR(EIO);
    }
    // Check Version
    if (buffer[0] != 3) {
        av_log(s, AV_LOG_ERROR, "RTMP protocol version mismatch\n");
        return AVERROR(EIO);
    }
    if (ffurl_write(rt->stream, buffer, 1) <= 0) {                 // Send S0
        av_log(s, AV_LOG_ERROR,
               "Unable to write answer - RTMP S0\n");
        return AVERROR(EIO);
    }
    /* Receive C1 */
    ret = rtmp_receive_hs_packet(rt, &hs_epoch, &zeroes, hs_c1,
                                 RTMP_HANDSHAKE_PACKET_SIZE);
    if (ret) {
        av_log(s, AV_LOG_ERROR, "RTMP Handshake C1 Error\n");
        return ret;
    }
    /* Send S1 */
    /* By now same epoch will be sent */
    hs_my_epoch = hs_epoch;
    /* Generate random */
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    for (randomidx = 8; randomidx < (RTMP_HANDSHAKE_PACKET_SIZE);
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         randomidx += 4)
1457
        AV_WB32(hs_s1 + randomidx, av_get_random_seed());
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    ret = rtmp_send_hs_packet(rt, hs_my_epoch, 0, hs_s1,
                              RTMP_HANDSHAKE_PACKET_SIZE);
    if (ret) {
        av_log(s, AV_LOG_ERROR, "RTMP Handshake S1 Error\n");
        return ret;
    }
    /* Send S2 */
    ret = rtmp_send_hs_packet(rt, hs_epoch, 0, hs_c1,
                              RTMP_HANDSHAKE_PACKET_SIZE);
    if (ret) {
        av_log(s, AV_LOG_ERROR, "RTMP Handshake S2 Error\n");
        return ret;
    }
    /* Receive C2 */
    ret = rtmp_receive_hs_packet(rt, &temp, &zeroes, buffer,
                                 RTMP_HANDSHAKE_PACKET_SIZE);
    if (ret) {
        av_log(s, AV_LOG_ERROR, "RTMP Handshake C2 Error\n");
        return ret;
    }
    if (temp != hs_my_epoch)
        av_log(s, AV_LOG_WARNING,
               "Erroneous C2 Message epoch does not match up with C1 epoch\n");
    if (memcmp(buffer + 8, hs_s1 + 8,
               RTMP_HANDSHAKE_PACKET_SIZE - 8))
        av_log(s, AV_LOG_WARNING,
               "Erroneous C2 Message random does not match up\n");

    return 0;
}

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static int handle_chunk_size(URLContext *s, RTMPPacket *pkt)
{
    RTMPContext *rt = s->priv_data;
    int ret;

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    if (pkt->size < 4) {
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        av_log(s, AV_LOG_ERROR,
1497
               "Too short chunk size change packet (%d)\n",
1498
               pkt->size);
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        return AVERROR_INVALIDDATA;
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    }

    if (!rt->is_input) {
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        /* Send the same chunk size change packet back to the server,
         * setting the outgoing chunk size to the same as the incoming one. */
        if ((ret = ff_rtmp_packet_write(rt->stream, pkt, rt->out_chunk_size,
1506
                                        &rt->prev_pkt[1], &rt->nb_prev_pkt[1])) < 0)
1507
            return ret;
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        rt->out_chunk_size = AV_RB32(pkt->data);
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    }

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    rt->in_chunk_size = AV_RB32(pkt->data);
    if (rt->in_chunk_size <= 0) {
        av_log(s, AV_LOG_ERROR, "Incorrect chunk size %d\n",
               rt->in_chunk_size);
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        return AVERROR_INVALIDDATA;
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    }
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    av_log(s, AV_LOG_DEBUG, "New incoming chunk size = %d\n",
           rt->in_chunk_size);
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    return 0;
}

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static int handle_ping(URLContext *s, RTMPPacket *pkt)
{
    RTMPContext *rt = s->priv_data;
    int t, ret;

1528
    if (pkt->size < 2) {
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        av_log(s, AV_LOG_ERROR, "Too short ping packet (%d)\n",
1530
               pkt->size);
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        return AVERROR_INVALIDDATA;
    }

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    t = AV_RB16(pkt->data);
    if (t == 6) {
        if ((ret = gen_pong(s, rt, pkt)) < 0)
            return ret;
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    } else if (t == 26) {
        if (rt->swfsize) {
            if ((ret = gen_swf_verification(s, rt)) < 0)
                return ret;
        } else {
            av_log(s, AV_LOG_WARNING, "Ignoring SWFVerification request.\n");
        }
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    }

    return 0;
}

1550
static int handle_client_bw(URLContext *s, RTMPPacket *pkt)
1551
{
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    RTMPContext *rt = s->priv_data;

1554
    if (pkt->size < 4) {
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        av_log(s, AV_LOG_ERROR,
               "Client bandwidth report packet is less than 4 bytes long (%d)\n",
1557
               pkt->size);
1558
        return AVERROR_INVALIDDATA;
1559
    }
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    rt->client_report_size = AV_RB32(pkt->data);
    if (rt->client_report_size <= 0) {
        av_log(s, AV_LOG_ERROR, "Incorrect client bandwidth %d\n",
                rt->client_report_size);
        return AVERROR_INVALIDDATA;

    }
    av_log(s, AV_LOG_DEBUG, "Client bandwidth = %d\n", rt->client_report_size);
    rt->client_report_size >>= 1;
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    return 0;
}

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static int handle_server_bw(URLContext *s, RTMPPacket *pkt)
{
    RTMPContext *rt = s->priv_data;

1578
    if (pkt->size < 4) {
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        av_log(s, AV_LOG_ERROR,
               "Too short server bandwidth report packet (%d)\n",
1581
               pkt->size);
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        return AVERROR_INVALIDDATA;
    }

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    rt->server_bw = AV_RB32(pkt->data);
    if (rt->server_bw <= 0) {
        av_log(s, AV_LOG_ERROR, "Incorrect server bandwidth %d\n",
               rt->server_bw);
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        return AVERROR_INVALIDDATA;
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    }
    av_log(s, AV_LOG_DEBUG, "Server bandwidth = %d\n", rt->server_bw);

    return 0;
}

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static int do_adobe_auth(RTMPContext *rt, const char *user, const char *salt,
                         const char *opaque, const char *challenge)
{
    uint8_t hash[16];
    char hashstr[AV_BASE64_SIZE(sizeof(hash))], challenge2[10];
    struct AVMD5 *md5 = av_md5_alloc();
    if (!md5)
        return AVERROR(ENOMEM);

    snprintf(challenge2, sizeof(challenge2), "%08x", av_get_random_seed());

    av_md5_init(md5);
    av_md5_update(md5, user, strlen(user));
    av_md5_update(md5, salt, strlen(salt));
    av_md5_update(md5, rt->password, strlen(rt->password));
    av_md5_final(md5, hash);
    av_base64_encode(hashstr, sizeof(hashstr), hash,
                     sizeof(hash));
    av_md5_init(md5);
    av_md5_update(md5, hashstr, strlen(hashstr));
    if (opaque)
        av_md5_update(md5, opaque, strlen(opaque));
    else if (challenge)
        av_md5_update(md5, challenge, strlen(challenge));
    av_md5_update(md5, challenge2, strlen(challenge2));
    av_md5_final(md5, hash);
    av_base64_encode(hashstr, sizeof(hashstr), hash,
                     sizeof(hash));
    snprintf(rt->auth_params, sizeof(rt->auth_params),
             "?authmod=%s&user=%s&challenge=%s&response=%s",
             "adobe", user, challenge2, hashstr);
    if (opaque)
        av_strlcatf(rt->auth_params, sizeof(rt->auth_params),
                    "&opaque=%s", opaque);

    av_free(md5);
    return 0;
}

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static int do_llnw_auth(RTMPContext *rt, const char *user, const char *nonce)
{
    uint8_t hash[16];
    char hashstr1[33], hashstr2[33];
    const char *realm = "live";
    const char *method = "publish";
    const char *qop = "auth";
    const char *nc = "00000001";
    char cnonce[10];
    struct AVMD5 *md5 = av_md5_alloc();
    if (!md5)
        return AVERROR(ENOMEM);

    snprintf(cnonce, sizeof(cnonce), "%08x", av_get_random_seed());

    av_md5_init(md5);
    av_md5_update(md5, user, strlen(user));
    av_md5_update(md5, ":", 1);
    av_md5_update(md5, realm, strlen(realm));
    av_md5_update(md5, ":", 1);
    av_md5_update(md5, rt->password, strlen(rt->password));
    av_md5_final(md5, hash);
    ff_data_to_hex(hashstr1, hash, 16, 1);
    hashstr1[32] = '\0';

    av_md5_init(md5);
    av_md5_update(md5, method, strlen(method));
    av_md5_update(md5, ":/", 2);
    av_md5_update(md5, rt->app, strlen(rt->app));
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    if (!strchr(rt->app, '/'))
        av_md5_update(md5, "/_definst_", strlen("/_definst_"));
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    av_md5_final(md5, hash);
    ff_data_to_hex(hashstr2, hash, 16, 1);
    hashstr2[32] = '\0';

    av_md5_init(md5);
    av_md5_update(md5, hashstr1, strlen(hashstr1));
    av_md5_update(md5, ":", 1);
    if (nonce)
        av_md5_update(md5, nonce, strlen(nonce));
    av_md5_update(md5, ":", 1);
    av_md5_update(md5, nc, strlen(nc));
    av_md5_update(md5, ":", 1);
    av_md5_update(md5, cnonce, strlen(cnonce));
    av_md5_update(md5, ":", 1);
    av_md5_update(md5, qop, strlen(qop));
    av_md5_update(md5, ":", 1);
    av_md5_update(md5, hashstr2, strlen(hashstr2));
    av_md5_final(md5, hash);
    ff_data_to_hex(hashstr1, hash, 16, 1);

    snprintf(rt->auth_params, sizeof(rt->auth_params),
             "?authmod=%s&user=%s&nonce=%s&cnonce=%s&nc=%s&response=%s",
             "llnw", user, nonce, cnonce, nc, hashstr1);

    av_free(md5);
    return 0;
}

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static int handle_connect_error(URLContext *s, const char *desc)
{
    RTMPContext *rt = s->priv_data;
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    char buf[300], *ptr, authmod[15];
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    int i = 0, ret = 0;
    const char *user = "", *salt = "", *opaque = NULL,
1700
               *challenge = NULL, *cptr = NULL, *nonce = NULL;
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1702 1703
    if (!(cptr = strstr(desc, "authmod=adobe")) &&
        !(cptr = strstr(desc, "authmod=llnw"))) {
1704 1705 1706 1707
        av_log(s, AV_LOG_ERROR,
               "Unknown connect error (unsupported authentication method?)\n");
        return AVERROR_UNKNOWN;
    }
1708 1709 1710 1711
    cptr += strlen("authmod=");
    while (*cptr && *cptr != ' ' && i < sizeof(authmod) - 1)
        authmod[i++] = *cptr++;
    authmod[i] = '\0';
1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734

    if (!rt->username[0] || !rt->password[0]) {
        av_log(s, AV_LOG_ERROR, "No credentials set\n");
        return AVERROR_UNKNOWN;
    }

    if (strstr(desc, "?reason=authfailed")) {
        av_log(s, AV_LOG_ERROR, "Incorrect username/password\n");
        return AVERROR_UNKNOWN;
    } else if (strstr(desc, "?reason=nosuchuser")) {
        av_log(s, AV_LOG_ERROR, "Incorrect username\n");
        return AVERROR_UNKNOWN;
    }

    if (rt->auth_tried) {
        av_log(s, AV_LOG_ERROR, "Authentication failed\n");
        return AVERROR_UNKNOWN;
    }

    rt->auth_params[0] = '\0';

    if (strstr(desc, "code=403 need auth")) {
        snprintf(rt->auth_params, sizeof(rt->auth_params),
1735
                 "?authmod=%s&user=%s", authmod, rt->username);
1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751
        return 0;
    }

    if (!(cptr = strstr(desc, "?reason=needauth"))) {
        av_log(s, AV_LOG_ERROR, "No auth parameters found\n");
        return AVERROR_UNKNOWN;
    }

    av_strlcpy(buf, cptr + 1, sizeof(buf));
    ptr = buf;

    while (ptr) {
        char *next  = strchr(ptr, '&');
        char *value = strchr(ptr, '=');
        if (next)
            *next++ = '\0';
1752
        if (value) {
1753
            *value++ = '\0';
1754 1755 1756 1757 1758 1759 1760 1761 1762 1763
            if (!strcmp(ptr, "user")) {
                user = value;
            } else if (!strcmp(ptr, "salt")) {
                salt = value;
            } else if (!strcmp(ptr, "opaque")) {
                opaque = value;
            } else if (!strcmp(ptr, "challenge")) {
                challenge = value;
            } else if (!strcmp(ptr, "nonce")) {
                nonce = value;
1764 1765
            } else {
                av_log(s, AV_LOG_INFO, "Ignoring unsupported var %s\n", ptr);
1766 1767 1768
            }
        } else {
            av_log(s, AV_LOG_WARNING, "Variable %s has NULL value\n", ptr);
1769 1770 1771 1772
        }
        ptr = next;
    }

1773
    if (!strcmp(authmod, "adobe")) {
1774
        if ((ret = do_adobe_auth(rt, user, salt, opaque, challenge)) < 0)
1775 1776 1777 1778 1779
            return ret;
    } else {
        if ((ret = do_llnw_auth(rt, user, nonce)) < 0)
            return ret;
    }
1780 1781 1782 1783 1784

    rt->auth_tried = 1;
    return 0;
}

1785
static int handle_invoke_error(URLContext *s, RTMPPacket *pkt)
1786
{
1787
    RTMPContext *rt = s->priv_data;
1788
    const uint8_t *data_end = pkt->data + pkt->size;
1789 1790
    char *tracked_method = NULL;
    int level = AV_LOG_ERROR;
1791
    uint8_t tmpstr[256];
1792 1793 1794 1795
    int ret;

    if ((ret = find_tracked_method(s, pkt, 9, &tracked_method)) < 0)
        return ret;
1796 1797 1798

    if (!ff_amf_get_field_value(pkt->data + 9, data_end,
                                "description", tmpstr, sizeof(tmpstr))) {
1799 1800 1801 1802 1803
        if (tracked_method && (!strcmp(tracked_method, "_checkbw")      ||
                               !strcmp(tracked_method, "releaseStream") ||
                               !strcmp(tracked_method, "FCSubscribe")   ||
                               !strcmp(tracked_method, "FCPublish"))) {
            /* Gracefully ignore Adobe-specific historical artifact errors. */
1804 1805
            level = AV_LOG_WARNING;
            ret = 0;
1806 1807
        } else if (tracked_method && !strcmp(tracked_method, "getStreamLength")) {
            level = rt->live ? AV_LOG_DEBUG : AV_LOG_WARNING;
1808
            ret = 0;
1809 1810 1811 1812 1813 1814
        } else if (tracked_method && !strcmp(tracked_method, "connect")) {
            ret = handle_connect_error(s, tmpstr);
            if (!ret) {
                rt->do_reconnect = 1;
                level = AV_LOG_VERBOSE;
            }
1815
        } else
1816
            ret = AVERROR_UNKNOWN;
1817
        av_log(s, level, "Server error: %s\n", tmpstr);
1818 1819
    }

1820 1821
    av_free(tracked_method);
    return ret;
1822 1823
}

1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842
static int write_begin(URLContext *s)
{
    RTMPContext *rt = s->priv_data;
    PutByteContext pbc;
    RTMPPacket spkt = { 0 };
    int ret;

    // Send Stream Begin 1
    if ((ret = ff_rtmp_packet_create(&spkt, RTMP_NETWORK_CHANNEL,
                                     RTMP_PT_PING, 0, 6)) < 0) {
        av_log(s, AV_LOG_ERROR, "Unable to create response packet\n");
        return ret;
    }

    bytestream2_init_writer(&pbc, spkt.data, spkt.size);
    bytestream2_put_be16(&pbc, 0);          // 0 -> Stream Begin
    bytestream2_put_be32(&pbc, rt->nb_streamid);

    ret = ff_rtmp_packet_write(rt->stream, &spkt, rt->out_chunk_size,
1843
                               &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889

    ff_rtmp_packet_destroy(&spkt);

    return ret;
}

static int write_status(URLContext *s, RTMPPacket *pkt,
                        const char *status, const char *filename)
{
    RTMPContext *rt = s->priv_data;
    RTMPPacket spkt = { 0 };
    char statusmsg[128];
    uint8_t *pp;
    int ret;

    if ((ret = ff_rtmp_packet_create(&spkt, RTMP_SYSTEM_CHANNEL,
                                     RTMP_PT_INVOKE, 0,
                                     RTMP_PKTDATA_DEFAULT_SIZE)) < 0) {
        av_log(s, AV_LOG_ERROR, "Unable to create response packet\n");
        return ret;
    }

    pp = spkt.data;
    spkt.extra = pkt->extra;
    ff_amf_write_string(&pp, "onStatus");
    ff_amf_write_number(&pp, 0);
    ff_amf_write_null(&pp);

    ff_amf_write_object_start(&pp);
    ff_amf_write_field_name(&pp, "level");
    ff_amf_write_string(&pp, "status");
    ff_amf_write_field_name(&pp, "code");
    ff_amf_write_string(&pp, status);
    ff_amf_write_field_name(&pp, "description");
    snprintf(statusmsg, sizeof(statusmsg),
             "%s is now published", filename);
    ff_amf_write_string(&pp, statusmsg);
    ff_amf_write_field_name(&pp, "details");
    ff_amf_write_string(&pp, filename);
    ff_amf_write_field_name(&pp, "clientid");
    snprintf(statusmsg, sizeof(statusmsg), "%s", LIBAVFORMAT_IDENT);
    ff_amf_write_string(&pp, statusmsg);
    ff_amf_write_object_end(&pp);

    spkt.size = pp - spkt.data;
    ret = ff_rtmp_packet_write(rt->stream, &spkt, rt->out_chunk_size,
1890
                               &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
1891 1892 1893 1894 1895
    ff_rtmp_packet_destroy(&spkt);

    return ret;
}

1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909
static int send_invoke_response(URLContext *s, RTMPPacket *pkt)
{
    RTMPContext *rt = s->priv_data;
    double seqnum;
    char filename[64];
    char command[64];
    int stringlen;
    char *pchar;
    const uint8_t *p = pkt->data;
    uint8_t *pp      = NULL;
    RTMPPacket spkt  = { 0 };
    GetByteContext gbc;
    int ret;

1910
    bytestream2_init(&gbc, p, pkt->size);
1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953
    if (ff_amf_read_string(&gbc, command, sizeof(command),
                           &stringlen)) {
        av_log(s, AV_LOG_ERROR, "Error in PT_INVOKE\n");
        return AVERROR_INVALIDDATA;
    }

    ret = ff_amf_read_number(&gbc, &seqnum);
    if (ret)
        return ret;
    ret = ff_amf_read_null(&gbc);
    if (ret)
        return ret;
    if (!strcmp(command, "FCPublish") ||
        !strcmp(command, "publish")) {
        ret = ff_amf_read_string(&gbc, filename,
                                 sizeof(filename), &stringlen);
        // check with url
        if (s->filename) {
            pchar = strrchr(s->filename, '/');
            if (!pchar) {
                av_log(s, AV_LOG_WARNING,
                       "Unable to find / in url %s, bad format\n",
                       s->filename);
                pchar = s->filename;
            }
            pchar++;
            if (strcmp(pchar, filename))
                av_log(s, AV_LOG_WARNING, "Unexpected stream %s, expecting"
                       " %s\n", filename, pchar);
        }
        rt->state = STATE_RECEIVING;
    }

    if (!strcmp(command, "FCPublish")) {
        if ((ret = ff_rtmp_packet_create(&spkt, RTMP_SYSTEM_CHANNEL,
                                         RTMP_PT_INVOKE, 0,
                                         RTMP_PKTDATA_DEFAULT_SIZE)) < 0) {
            av_log(s, AV_LOG_ERROR, "Unable to create response packet\n");
            return ret;
        }
        pp = spkt.data;
        ff_amf_write_string(&pp, "onFCPublish");
    } else if (!strcmp(command, "publish")) {
1954
        ret = write_begin(s);
1955 1956 1957 1958
        if (ret < 0)
            return ret;

        // Send onStatus(NetStream.Publish.Start)
1959 1960
        return write_status(s, pkt, "NetStream.Publish.Start",
                           filename);
1961 1962 1963 1964 1965 1966 1967
    } else if (!strcmp(command, "play")) {
        ret = write_begin(s);
        if (ret < 0)
            return ret;
        rt->state = STATE_SENDING;
        return write_status(s, pkt, "NetStream.Play.Start",
                            filename);
1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988
    } else {
        if ((ret = ff_rtmp_packet_create(&spkt, RTMP_SYSTEM_CHANNEL,
                                         RTMP_PT_INVOKE, 0,
                                         RTMP_PKTDATA_DEFAULT_SIZE)) < 0) {
            av_log(s, AV_LOG_ERROR, "Unable to create response packet\n");
            return ret;
        }
        pp = spkt.data;
        ff_amf_write_string(&pp, "_result");
        ff_amf_write_number(&pp, seqnum);
        ff_amf_write_null(&pp);
        if (!strcmp(command, "createStream")) {
            rt->nb_streamid++;
            if (rt->nb_streamid == 0 || rt->nb_streamid == 2)
                rt->nb_streamid++; /* Values 0 and 2 are reserved */
            ff_amf_write_number(&pp, rt->nb_streamid);
            /* By now we don't control which streams are removed in
             * deleteStream. There is no stream creation control
             * if a client creates more than 2^32 - 2 streams. */
        }
    }
1989
    spkt.size = pp - spkt.data;
1990
    ret = ff_rtmp_packet_write(rt->stream, &spkt, rt->out_chunk_size,
1991
                               &rt->prev_pkt[1], &rt->nb_prev_pkt[1]);
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    ff_rtmp_packet_destroy(&spkt);
    return ret;
}

1996 1997 1998 1999 2000 2001 2002
/**
 * Read the AMF_NUMBER response ("_result") to a function call
 * (e.g. createStream()). This response should be made up of the AMF_STRING
 * "result", a NULL object and then the response encoded as AMF_NUMBER. On a
 * successful response, we will return set the value to number (otherwise number
 * will not be changed).
 *
2003
 * @return 0 if reading the value succeeds, negative value otherwise
2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025
 */
static int read_number_result(RTMPPacket *pkt, double *number)
{
    // We only need to fit "_result" in this.
    uint8_t strbuffer[8];
    int stringlen;
    double numbuffer;
    GetByteContext gbc;

    bytestream2_init(&gbc, pkt->data, pkt->size);

    // Value 1/4: "_result" as AMF_STRING
    if (ff_amf_read_string(&gbc, strbuffer, sizeof(strbuffer), &stringlen))
        return AVERROR_INVALIDDATA;
    if (strcmp(strbuffer, "_result"))
        return AVERROR_INVALIDDATA;
    // Value 2/4: The callee reference number
    if (ff_amf_read_number(&gbc, &numbuffer))
        return AVERROR_INVALIDDATA;
    // Value 3/4: Null
    if (ff_amf_read_null(&gbc))
        return AVERROR_INVALIDDATA;
2026
    // Value 4/4: The response as AMF_NUMBER
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    if (ff_amf_read_number(&gbc, &numbuffer))
        return AVERROR_INVALIDDATA;
    else
        *number = numbuffer;

    return 0;
}

2035 2036 2037
static int handle_invoke_result(URLContext *s, RTMPPacket *pkt)
{
    RTMPContext *rt = s->priv_data;
2038 2039
    char *tracked_method = NULL;
    int ret = 0;
2040

2041
    if ((ret = find_tracked_method(s, pkt, 10, &tracked_method)) < 0)
2042
        return ret;
2043

2044 2045 2046 2047
    if (!tracked_method) {
        /* Ignore this reply when the current method is not tracked. */
        return ret;
    }
2048

2049
    if (!strcmp(tracked_method, "connect")) {
2050 2051 2052
        if (!rt->is_input) {
            if ((ret = gen_release_stream(s, rt)) < 0)
                goto fail;
2053

2054 2055 2056 2057 2058
            if ((ret = gen_fcpublish_stream(s, rt)) < 0)
                goto fail;
        } else {
            if ((ret = gen_server_bw(s, rt)) < 0)
                goto fail;
2059 2060
        }

2061 2062
        if ((ret = gen_create_stream(s, rt)) < 0)
            goto fail;
2063

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        if (rt->is_input) {
            /* Send the FCSubscribe command when the name of live
             * stream is defined by the user or if it's a live stream. */
            if (rt->subscribe) {
                if ((ret = gen_fcsubscribe_stream(s, rt, rt->subscribe)) < 0)
                    goto fail;
            } else if (rt->live == -1) {
                if ((ret = gen_fcsubscribe_stream(s, rt, rt->playpath)) < 0)
                    goto fail;
2073
            }
2074
        }
2075
    } else if (!strcmp(tracked_method, "createStream")) {
2076 2077
        double stream_id;
        if (read_number_result(pkt, &stream_id)) {
2078 2079
            av_log(s, AV_LOG_WARNING, "Unexpected reply on connect()\n");
        } else {
2080
            rt->stream_id = stream_id;
2081
        }
2082 2083 2084 2085 2086

        if (!rt->is_input) {
            if ((ret = gen_publish(s, rt)) < 0)
                goto fail;
        } else {
2087 2088 2089 2090
            if (rt->live != -1) {
                if ((ret = gen_get_stream_length(s, rt)) < 0)
                    goto fail;
            }
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            if ((ret = gen_play(s, rt)) < 0)
                goto fail;
            if ((ret = gen_buffer_time(s, rt)) < 0)
                goto fail;
2095
        }
2096 2097 2098 2099
    } else if (!strcmp(tracked_method, "getStreamLength")) {
        if (read_number_result(pkt, &rt->duration)) {
            av_log(s, AV_LOG_WARNING, "Unexpected reply on getStreamLength()\n");
        }
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    }

fail:
    av_free(tracked_method);
    return ret;
}

2107
static int handle_invoke_status(URLContext *s, RTMPPacket *pkt)
2108
{
2109
    RTMPContext *rt = s->priv_data;
2110
    const uint8_t *data_end = pkt->data + pkt->size;
2111
    const uint8_t *ptr = pkt->data + RTMP_HEADER;
2112
    uint8_t tmpstr[256];
2113
    int i, t;
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    for (i = 0; i < 2; i++) {
        t = ff_amf_tag_size(ptr, data_end);
        if (t < 0)
            return 1;
        ptr += t;
    }

    t = ff_amf_get_field_value(ptr, data_end, "level", tmpstr, sizeof(tmpstr));
    if (!t && !strcmp(tmpstr, "error")) {
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        t = ff_amf_get_field_value(ptr, data_end,
                                   "description", tmpstr, sizeof(tmpstr));
        if (t || !tmpstr[0])
            t = ff_amf_get_field_value(ptr, data_end, "code",
                                       tmpstr, sizeof(tmpstr));
        if (!t)
2130 2131 2132 2133 2134 2135 2136 2137 2138
            av_log(s, AV_LOG_ERROR, "Server error: %s\n", tmpstr);
        return -1;
    }

    t = ff_amf_get_field_value(ptr, data_end, "code", tmpstr, sizeof(tmpstr));
    if (!t && !strcmp(tmpstr, "NetStream.Play.Start")) rt->state = STATE_PLAYING;
    if (!t && !strcmp(tmpstr, "NetStream.Play.Stop")) rt->state = STATE_STOPPED;
    if (!t && !strcmp(tmpstr, "NetStream.Play.UnpublishNotify")) rt->state = STATE_STOPPED;
    if (!t && !strcmp(tmpstr, "NetStream.Publish.Start")) rt->state = STATE_PUBLISHING;
2139
    if (!t && !strcmp(tmpstr, "NetStream.Seek.Notify")) rt->state = STATE_PLAYING;
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    return 0;
}

static int handle_invoke(URLContext *s, RTMPPacket *pkt)
{
    RTMPContext *rt = s->priv_data;
2147
    int ret = 0;
2148

2149
    //TODO: check for the messages sent for wrong state?
2150
    if (ff_amf_match_string(pkt->data, pkt->size, "_error")) {
2151 2152
        if ((ret = handle_invoke_error(s, pkt)) < 0)
            return ret;
2153
    } else if (ff_amf_match_string(pkt->data, pkt->size, "_result")) {
2154
        if ((ret = handle_invoke_result(s, pkt)) < 0)
2155
            return ret;
2156
    } else if (ff_amf_match_string(pkt->data, pkt->size, "onStatus")) {
2157 2158
        if ((ret = handle_invoke_status(s, pkt)) < 0)
            return ret;
2159
    } else if (ff_amf_match_string(pkt->data, pkt->size, "onBWDone")) {
2160 2161
        if ((ret = gen_check_bw(s, rt)) < 0)
            return ret;
2162 2163 2164
    } else if (ff_amf_match_string(pkt->data, pkt->size, "releaseStream") ||
               ff_amf_match_string(pkt->data, pkt->size, "FCPublish")     ||
               ff_amf_match_string(pkt->data, pkt->size, "publish")       ||
2165
               ff_amf_match_string(pkt->data, pkt->size, "play")          ||
2166 2167
               ff_amf_match_string(pkt->data, pkt->size, "_checkbw")      ||
               ff_amf_match_string(pkt->data, pkt->size, "createStream")) {
2168
        if ((ret = send_invoke_response(s, pkt)) < 0)
2169
            return ret;
2170 2171
    }

2172
    return ret;
2173 2174
}

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static int update_offset(RTMPContext *rt, int size)
{
    int old_flv_size;
2178

2179 2180
    // generate packet header and put data into buffer for FLV demuxer
    if (rt->flv_off < rt->flv_size) {
2181
        // There is old unread data in the buffer, thus append at the end
2182
        old_flv_size  = rt->flv_size;
2183
        rt->flv_size += size;
2184
    } else {
2185
        // All data has been read, write the new data at the start of the buffer
2186
        old_flv_size = 0;
2187
        rt->flv_size = size;
2188
        rt->flv_off  = 0;
2189
    }
2190

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    return old_flv_size;
}

static int append_flv_data(RTMPContext *rt, RTMPPacket *pkt, int skip)
{
    int old_flv_size, ret;
    PutByteContext pbc;
    const uint8_t *data = pkt->data + skip;
    const int size      = pkt->size - skip;
    uint32_t ts         = pkt->timestamp;

2202 2203 2204 2205 2206 2207
    if (pkt->type == RTMP_PT_AUDIO) {
        rt->has_audio = 1;
    } else if (pkt->type == RTMP_PT_VIDEO) {
        rt->has_video = 1;
    }

2208
    old_flv_size = update_offset(rt, size + 15);
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2210 2211
    if ((ret = av_reallocp(&rt->flv_data, rt->flv_size)) < 0) {
        rt->flv_size = rt->flv_off = 0;
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        return ret;
2213
    }
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    bytestream2_init_writer(&pbc, rt->flv_data, rt->flv_size);
    bytestream2_skip_p(&pbc, old_flv_size);
    bytestream2_put_byte(&pbc, pkt->type);
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    bytestream2_put_be24(&pbc, size);
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    bytestream2_put_be24(&pbc, ts);
    bytestream2_put_byte(&pbc, ts >> 24);
    bytestream2_put_be24(&pbc, 0);
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    bytestream2_put_buffer(&pbc, data, size);
2222
    bytestream2_put_be32(&pbc, size + RTMP_HEADER);
2223

2224 2225 2226
    return 0;
}

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static int handle_notify(URLContext *s, RTMPPacket *pkt)
{
    RTMPContext *rt  = s->priv_data;
    uint8_t commandbuffer[64];
    char statusmsg[128];
    int stringlen, ret, skip = 0;
    GetByteContext gbc;

    bytestream2_init(&gbc, pkt->data, pkt->size);
    if (ff_amf_read_string(&gbc, commandbuffer, sizeof(commandbuffer),
                           &stringlen))
        return AVERROR_INVALIDDATA;

2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271
    if (!strcmp(commandbuffer, "onMetaData")) {
        // metadata properties should be stored in a mixed array
        if (bytestream2_get_byte(&gbc) == AMF_DATA_TYPE_MIXEDARRAY) {
            // We have found a metaData Array so flv can determine the streams
            // from this.
            rt->received_metadata = 1;
            // skip 32-bit max array index
            bytestream2_skip(&gbc, 4);
            while (bytestream2_get_bytes_left(&gbc) > 3) {
                if (ff_amf_get_string(&gbc, statusmsg, sizeof(statusmsg),
                                      &stringlen))
                    return AVERROR_INVALIDDATA;
                // We do not care about the content of the property (yet).
                stringlen = ff_amf_tag_size(gbc.buffer, gbc.buffer_end);
                if (stringlen < 0)
                    return AVERROR_INVALIDDATA;
                bytestream2_skip(&gbc, stringlen);

                // The presence of the following properties indicates that the
                // respective streams are present.
                if (!strcmp(statusmsg, "videocodecid")) {
                    rt->has_video = 1;
                }
                if (!strcmp(statusmsg, "audiocodecid")) {
                    rt->has_audio = 1;
                }
            }
            if (bytestream2_get_be24(&gbc) != AMF_END_OF_OBJECT)
                return AVERROR_INVALIDDATA;
        }
    }

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2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283
    // Skip the @setDataFrame string and validate it is a notification
    if (!strcmp(commandbuffer, "@setDataFrame")) {
        skip = gbc.buffer - pkt->data;
        ret = ff_amf_read_string(&gbc, statusmsg,
                                 sizeof(statusmsg), &stringlen);
        if (ret < 0)
            return AVERROR_INVALIDDATA;
    }

    return append_flv_data(rt, pkt, skip);
}

2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298
/**
 * Parse received packet and possibly perform some action depending on
 * the packet contents.
 * @return 0 for no errors, negative values for serious errors which prevent
 *         further communications, positive values for uncritical errors
 */
static int rtmp_parse_result(URLContext *s, RTMPContext *rt, RTMPPacket *pkt)
{
    int ret;

#ifdef DEBUG
    ff_rtmp_packet_dump(s, pkt);
#endif

    switch (pkt->type) {
2299
    case RTMP_PT_BYTES_READ:
2300
        av_log(s, AV_LOG_TRACE, "received bytes read report\n");
2301
        break;
2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320
    case RTMP_PT_CHUNK_SIZE:
        if ((ret = handle_chunk_size(s, pkt)) < 0)
            return ret;
        break;
    case RTMP_PT_PING:
        if ((ret = handle_ping(s, pkt)) < 0)
            return ret;
        break;
    case RTMP_PT_CLIENT_BW:
        if ((ret = handle_client_bw(s, pkt)) < 0)
            return ret;
        break;
    case RTMP_PT_SERVER_BW:
        if ((ret = handle_server_bw(s, pkt)) < 0)
            return ret;
        break;
    case RTMP_PT_INVOKE:
        if ((ret = handle_invoke(s, pkt)) < 0)
            return ret;
2321
        break;
2322 2323
    case RTMP_PT_VIDEO:
    case RTMP_PT_AUDIO:
2324
    case RTMP_PT_METADATA:
2325
    case RTMP_PT_NOTIFY:
2326
        /* Audio, Video and Metadata packets are parsed in get_packet() */
2327
        break;
2328 2329 2330
    default:
        av_log(s, AV_LOG_VERBOSE, "Unknown packet type received 0x%02X\n", pkt->type);
        break;
2331 2332 2333 2334
    }
    return 0;
}

2335 2336 2337 2338 2339 2340 2341 2342 2343 2344
static int handle_metadata(RTMPContext *rt, RTMPPacket *pkt)
{
    int ret, old_flv_size, type;
    const uint8_t *next;
    uint8_t *p;
    uint32_t size;
    uint32_t ts, cts, pts = 0;

    old_flv_size = update_offset(rt, pkt->size);

2345 2346
    if ((ret = av_reallocp(&rt->flv_data, rt->flv_size)) < 0) {
        rt->flv_size = rt->flv_off = 0;
2347
        return ret;
2348
    }
2349 2350 2351 2352 2353 2354 2355

    next = pkt->data;
    p    = rt->flv_data + old_flv_size;

    /* copy data while rewriting timestamps */
    ts = pkt->timestamp;

2356
    while (next - pkt->data < pkt->size - RTMP_HEADER) {
2357 2358 2359 2360 2361 2362 2363 2364
        type = bytestream_get_byte(&next);
        size = bytestream_get_be24(&next);
        cts  = bytestream_get_be24(&next);
        cts |= bytestream_get_byte(&next) << 24;
        if (!pts)
            pts = cts;
        ts += cts - pts;
        pts = cts;
2365 2366
        if (size + 3 + 4 > pkt->data + pkt->size - next)
            break;
2367 2368 2369 2370 2371
        bytestream_put_byte(&p, type);
        bytestream_put_be24(&p, size);
        bytestream_put_be24(&p, ts);
        bytestream_put_byte(&p, ts >> 24);
        memcpy(p, next, size + 3 + 4);
2372
        p    += size + 3;
2373
        bytestream_put_be32(&p, size + RTMP_HEADER);
2374 2375
        next += size + 3 + 4;
    }
2376 2377 2378 2379 2380
    if (p != rt->flv_data + rt->flv_size) {
        av_log(NULL, AV_LOG_WARNING, "Incomplete flv packets in "
                                     "RTMP_PT_METADATA packet\n");
        rt->flv_size = p - rt->flv_data;
    }
2381 2382 2383 2384

    return 0;
}

2385
/**
2386
 * Interact with the server by receiving and sending RTMP packets until
2387 2388 2389
 * there is some significant data (media data or expected status notification).
 *
 * @param s          reading context
2390 2391 2392 2393
 * @param for_header non-zero value tells function to work until it
 * gets notification from the server that playing has been started,
 * otherwise function will work until some media data is received (or
 * an error happens)
2394 2395 2396 2397 2398 2399 2400
 * @return 0 for successful operation, negative value in case of error
 */
static int get_packet(URLContext *s, int for_header)
{
    RTMPContext *rt = s->priv_data;
    int ret;

2401 2402 2403
    if (rt->state == STATE_STOPPED)
        return AVERROR_EOF;

2404
    for (;;) {
2405
        RTMPPacket rpkt = { 0 };
2406
        if ((ret = ff_rtmp_packet_read(rt->stream, &rpkt,
2407 2408
                                       rt->in_chunk_size, &rt->prev_pkt[0],
                                       &rt->nb_prev_pkt[0])) <= 0) {
2409
            if (ret == 0) {
2410 2411 2412 2413 2414
                return AVERROR(EAGAIN);
            } else {
                return AVERROR(EIO);
            }
        }
2415 2416 2417 2418

        // Track timestamp for later use
        rt->last_timestamp = rpkt.timestamp;

2419
        rt->bytes_read += ret;
2420
        if (rt->bytes_read - rt->last_bytes_read > rt->client_report_size) {
2421
            av_log(s, AV_LOG_DEBUG, "Sending bytes read report\n");
2422 2423
            if ((ret = gen_bytes_read(s, rt, rpkt.timestamp + 1)) < 0)
                return ret;
2424 2425
            rt->last_bytes_read = rt->bytes_read;
        }
2426 2427

        ret = rtmp_parse_result(s, rt, &rpkt);
2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438

        // At this point we must check if we are in the seek state and continue
        // with the next packet. handle_invoke will get us out of this state
        // when the right message is encountered
        if (rt->state == STATE_SEEKING) {
            ff_rtmp_packet_destroy(&rpkt);
            // We continue, let the natural flow of things happen:
            // AVERROR(EAGAIN) or handle_invoke gets us out of here
            continue;
        }

2439 2440
        if (ret < 0) {//serious error in current packet
            ff_rtmp_packet_destroy(&rpkt);
2441
            return ret;
2442
        }
2443 2444 2445 2446
        if (rt->do_reconnect && for_header) {
            ff_rtmp_packet_destroy(&rpkt);
            return 0;
        }
2447 2448 2449 2450
        if (rt->state == STATE_STOPPED) {
            ff_rtmp_packet_destroy(&rpkt);
            return AVERROR_EOF;
        }
2451 2452
        if (for_header && (rt->state == STATE_PLAYING    ||
                           rt->state == STATE_PUBLISHING ||
2453
                           rt->state == STATE_SENDING    ||
2454
                           rt->state == STATE_RECEIVING)) {
2455 2456 2457
            ff_rtmp_packet_destroy(&rpkt);
            return 0;
        }
2458
        if (!rpkt.size || !rt->is_input) {
2459 2460 2461
            ff_rtmp_packet_destroy(&rpkt);
            continue;
        }
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2462 2463
        if (rpkt.type == RTMP_PT_VIDEO || rpkt.type == RTMP_PT_AUDIO) {
            ret = append_flv_data(rt, &rpkt, 0);
2464
            ff_rtmp_packet_destroy(&rpkt);
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2465
            return ret;
2466 2467 2468
        } else if (rpkt.type == RTMP_PT_NOTIFY) {
            ret = handle_notify(s, &rpkt);
            ff_rtmp_packet_destroy(&rpkt);
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2469
            return ret;
2470
        } else if (rpkt.type == RTMP_PT_METADATA) {
2471
            ret = handle_metadata(rt, &rpkt);
2472 2473 2474 2475 2476 2477 2478 2479 2480 2481
            ff_rtmp_packet_destroy(&rpkt);
            return 0;
        }
        ff_rtmp_packet_destroy(&rpkt);
    }
}

static int rtmp_close(URLContext *h)
{
    RTMPContext *rt = h->priv_data;
2482
    int ret = 0, i, j;
2483

2484
    if (!rt->is_input) {
2485
        rt->flv_data = NULL;
2486
        if (rt->out_pkt.size)
2487
            ff_rtmp_packet_destroy(&rt->out_pkt);
2488
        if (rt->state > STATE_FCPUBLISH)
2489
            ret = gen_fcunpublish_stream(h, rt);
2490
    }
2491
    if (rt->state > STATE_HANDSHAKED)
2492
        ret = gen_delete_stream(h, rt);
2493 2494
    for (i = 0; i < 2; i++) {
        for (j = 0; j < rt->nb_prev_pkt[i]; j++)
2495
            ff_rtmp_packet_destroy(&rt->prev_pkt[i][j]);
2496 2497
        av_freep(&rt->prev_pkt[i]);
    }
2498

2499
    free_tracked_methods(rt);
2500
    av_freep(&rt->flv_data);
2501
    ffurl_close(rt->stream);
2502
    return ret;
2503 2504
}

2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516
/**
 * Insert a fake onMetadata packet into the FLV stream to notify the FLV
 * demuxer about the duration of the stream.
 *
 * This should only be done if there was no real onMetadata packet sent by the
 * server at the start of the stream and if we were able to retrieve a valid
 * duration via a getStreamLength call.
 *
 * @return 0 for successful operation, negative value in case of error
 */
static int inject_fake_duration_metadata(RTMPContext *rt)
{
2517
    // We need to insert the metadata packet directly after the FLV
2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536
    // header, i.e. we need to move all other already read data by the
    // size of our fake metadata packet.

    uint8_t* p;
    // Keep old flv_data pointer
    uint8_t* old_flv_data = rt->flv_data;
    // Allocate a new flv_data pointer with enough space for the additional package
    if (!(rt->flv_data = av_malloc(rt->flv_size + 55))) {
        rt->flv_data = old_flv_data;
        return AVERROR(ENOMEM);
    }

    // Copy FLV header
    memcpy(rt->flv_data, old_flv_data, 13);
    // Copy remaining packets
    memcpy(rt->flv_data + 13 + 55, old_flv_data + 13, rt->flv_size - 13);
    // Increase the size by the injected packet
    rt->flv_size += 55;
    // Delete the old FLV data
2537
    av_freep(&old_flv_data);
2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563

    p = rt->flv_data + 13;
    bytestream_put_byte(&p, FLV_TAG_TYPE_META);
    bytestream_put_be24(&p, 40); // size of data part (sum of all parts below)
    bytestream_put_be24(&p, 0);  // timestamp
    bytestream_put_be32(&p, 0);  // reserved

    // first event name as a string
    bytestream_put_byte(&p, AMF_DATA_TYPE_STRING);
    // "onMetaData" as AMF string
    bytestream_put_be16(&p, 10);
    bytestream_put_buffer(&p, "onMetaData", 10);

    // mixed array (hash) with size and string/type/data tuples
    bytestream_put_byte(&p, AMF_DATA_TYPE_MIXEDARRAY);
    bytestream_put_be32(&p, 1); // metadata_count

    // "duration" as AMF string
    bytestream_put_be16(&p, 8);
    bytestream_put_buffer(&p, "duration", 8);
    bytestream_put_byte(&p, AMF_DATA_TYPE_NUMBER);
    bytestream_put_be64(&p, av_double2int(rt->duration));

    // Finalise object
    bytestream_put_be16(&p, 0); // Empty string
    bytestream_put_byte(&p, AMF_END_OF_OBJECT);
2564
    bytestream_put_be32(&p, 40 + RTMP_HEADER); // size of data part (sum of all parts above)
2565 2566 2567 2568

    return 0;
}

2569
/**
2570
 * Open RTMP connection and verify that the stream can be played.
2571 2572 2573 2574 2575 2576 2577 2578 2579
 *
 * URL syntax: rtmp://server[:port][/app][/playpath]
 *             where 'app' is first one or two directories in the path
 *             (e.g. /ondemand/, /flash/live/, etc.)
 *             and 'playpath' is a file name (the rest of the path,
 *             may be prefixed with "mp4:")
 */
static int rtmp_open(URLContext *s, const char *uri, int flags)
{
2580
    RTMPContext *rt = s->priv_data;
2581
    char proto[8], hostname[256], path[1024], auth[100], *fname;
2582
    char *old_app, *qmark, *n, fname_buffer[1024];
2583
    uint8_t buf[2048];
2584
    int port;
2585
    AVDictionary *opts = NULL;
2586 2587
    int ret;

2588 2589 2590
    if (rt->listen_timeout > 0)
        rt->listen = 1;

2591
    rt->is_input = !(flags & AVIO_FLAG_WRITE);
2592

2593 2594
    av_url_split(proto, sizeof(proto), auth, sizeof(auth),
                 hostname, sizeof(hostname), &port,
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2595
                 path, sizeof(path), s->filename);
2596

2597 2598
    n = strchr(path, ' ');
    if (n) {
2599 2600 2601 2602
        av_log(s, AV_LOG_WARNING,
               "Detected librtmp style URL parameters, these aren't supported "
               "by the libavformat internal RTMP handler currently enabled. "
               "See the documentation for the correct way to pass parameters.\n");
2603
        *n = '\0'; // Trim not supported part
2604 2605
    }

2606 2607 2608 2609 2610 2611 2612 2613 2614
    if (auth[0]) {
        char *ptr = strchr(auth, ':');
        if (ptr) {
            *ptr = '\0';
            av_strlcpy(rt->username, auth, sizeof(rt->username));
            av_strlcpy(rt->password, ptr + 1, sizeof(rt->password));
        }
    }

2615 2616 2617 2618 2619
    if (rt->listen && strcmp(proto, "rtmp")) {
        av_log(s, AV_LOG_ERROR, "rtmp_listen not available for %s\n",
               proto);
        return AVERROR(EINVAL);
    }
2620 2621 2622 2623
    if (!strcmp(proto, "rtmpt") || !strcmp(proto, "rtmpts")) {
        if (!strcmp(proto, "rtmpts"))
            av_dict_set(&opts, "ffrtmphttp_tls", "1", 1);

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2624
        /* open the http tunneling connection */
2625
        ff_url_join(buf, sizeof(buf), "ffrtmphttp", NULL, hostname, port, NULL);
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2626 2627 2628 2629 2630
    } else if (!strcmp(proto, "rtmps")) {
        /* open the tls connection */
        if (port < 0)
            port = RTMPS_DEFAULT_PORT;
        ff_url_join(buf, sizeof(buf), "tls", NULL, hostname, port, NULL);
2631 2632 2633 2634
    } else if (!strcmp(proto, "rtmpe") || (!strcmp(proto, "rtmpte"))) {
        if (!strcmp(proto, "rtmpte"))
            av_dict_set(&opts, "ffrtmpcrypt_tunneling", "1", 1);

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2635 2636 2637
        /* open the encrypted connection */
        ff_url_join(buf, sizeof(buf), "ffrtmpcrypt", NULL, hostname, port, NULL);
        rt->encrypted = 1;
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2638 2639 2640 2641
    } else {
        /* open the tcp connection */
        if (port < 0)
            port = RTMP_DEFAULT_PORT;
2642 2643 2644 2645 2646 2647
        if (rt->listen)
            ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port,
                        "?listen&listen_timeout=%d",
                        rt->listen_timeout * 1000);
        else
            ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL);
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Samuel Pitoiset committed
2648
    }
2649

2650
reconnect:
2651 2652
    if ((ret = ffurl_open_whitelist(&rt->stream, buf, AVIO_FLAG_READ_WRITE,
                                    &s->interrupt_callback, &opts,
2653
                                    s->protocol_whitelist, s->protocol_blacklist, s)) < 0) {
2654
        av_log(s , AV_LOG_ERROR, "Cannot open connection %s\n", buf);
2655
        goto fail;
2656
    }
2657

2658 2659 2660 2661 2662
    if (rt->swfverify) {
        if ((ret = rtmp_calc_swfhash(s)) < 0)
            goto fail;
    }

2663
    rt->state = STATE_START;
2664 2665 2666
    if (!rt->listen && (ret = rtmp_handshake(s, rt)) < 0)
        goto fail;
    if (rt->listen && (ret = rtmp_server_handshake(s, rt)) < 0)
2667
        goto fail;
2668

2669 2670
    rt->out_chunk_size = 128;
    rt->in_chunk_size  = 128; // Probably overwritten later
2671
    rt->state = STATE_HANDSHAKED;
2672 2673 2674 2675 2676 2677

    // Keep the application name when it has been defined by the user.
    old_app = rt->app;

    rt->app = av_malloc(APP_MAX_LENGTH);
    if (!rt->app) {
2678 2679
        ret = AVERROR(ENOMEM);
        goto fail;
2680 2681
    }

2682
    //extract "app" part from path
2683 2684 2685
    qmark = strchr(path, '?');
    if (qmark && strstr(qmark, "slist=")) {
        char* amp;
2686 2687
        // After slist we have the playpath, the full path is used as app
        av_strlcpy(rt->app, path + 1, APP_MAX_LENGTH);
2688 2689 2690 2691
        fname = strstr(path, "slist=") + 6;
        // Strip any further query parameters from fname
        amp = strchr(fname, '&');
        if (amp) {
2692 2693
            av_strlcpy(fname_buffer, fname, FFMIN(amp - fname + 1,
                                                  sizeof(fname_buffer)));
2694 2695 2696
            fname = fname_buffer;
        }
    } else if (!strncmp(path, "/ondemand/", 10)) {
2697 2698 2699
        fname = path + 10;
        memcpy(rt->app, "ondemand", 9);
    } else {
2700 2701
        char *next = *path ? path + 1 : path;
        char *p = strchr(next, '/');
2702
        if (!p) {
2703 2704 2705 2706 2707 2708 2709 2710
            if (old_app) {
                // If name of application has been defined by the user, assume that
                // playpath is provided in the URL
                fname = next;
            } else {
                fname = NULL;
                av_strlcpy(rt->app, next, APP_MAX_LENGTH);
            }
2711
        } else {
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2712
            // make sure we do not mismatch a playpath for an application instance
2713 2714
            char *c = strchr(p + 1, ':');
            fname = strchr(p + 1, '/');
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2715
            if (!fname || (c && c < fname)) {
2716
                fname = p + 1;
2717
                av_strlcpy(rt->app, path + 1, FFMIN(p - path, APP_MAX_LENGTH));
2718
            } else {
2719
                fname++;
2720
                av_strlcpy(rt->app, path + 1, FFMIN(fname - path - 1, APP_MAX_LENGTH));
2721 2722
            }
        }
2723
    }
2724 2725 2726

    if (old_app) {
        // The name of application has been defined by the user, override it.
2727 2728 2729 2730
        if (strlen(old_app) >= APP_MAX_LENGTH) {
            ret = AVERROR(EINVAL);
            goto fail;
        }
2731 2732 2733 2734
        av_free(rt->app);
        rt->app = old_app;
    }

2735 2736 2737
    if (!rt->playpath) {
        rt->playpath = av_malloc(PLAYPATH_MAX_LENGTH);
        if (!rt->playpath) {
2738 2739
            ret = AVERROR(ENOMEM);
            goto fail;
2740 2741
        }

2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753
        if (fname) {
            int len = strlen(fname);
            if (!strchr(fname, ':') && len >= 4 &&
                (!strcmp(fname + len - 4, ".f4v") ||
                 !strcmp(fname + len - 4, ".mp4"))) {
                memcpy(rt->playpath, "mp4:", 5);
            } else {
                if (len >= 4 && !strcmp(fname + len - 4, ".flv"))
                    fname[len - 4] = '\0';
                rt->playpath[0] = 0;
            }
            av_strlcat(rt->playpath, fname, PLAYPATH_MAX_LENGTH);
2754
        } else {
2755
            rt->playpath[0] = '\0';
2756
        }
2757
    }
2758

2759 2760
    if (!rt->tcurl) {
        rt->tcurl = av_malloc(TCURL_MAX_LENGTH);
2761 2762 2763 2764
        if (!rt->tcurl) {
            ret = AVERROR(ENOMEM);
            goto fail;
        }
2765 2766 2767 2768
        ff_url_join(rt->tcurl, TCURL_MAX_LENGTH, proto, NULL, hostname,
                    port, "/%s", rt->app);
    }

2769 2770
    if (!rt->flashver) {
        rt->flashver = av_malloc(FLASHVER_MAX_LENGTH);
2771 2772 2773 2774
        if (!rt->flashver) {
            ret = AVERROR(ENOMEM);
            goto fail;
        }
2775 2776 2777 2778 2779 2780 2781 2782 2783 2784
        if (rt->is_input) {
            snprintf(rt->flashver, FLASHVER_MAX_LENGTH, "%s %d,%d,%d,%d",
                    RTMP_CLIENT_PLATFORM, RTMP_CLIENT_VER1, RTMP_CLIENT_VER2,
                    RTMP_CLIENT_VER3, RTMP_CLIENT_VER4);
        } else {
            snprintf(rt->flashver, FLASHVER_MAX_LENGTH,
                    "FMLE/3.0 (compatible; %s)", LIBAVFORMAT_IDENT);
        }
    }

2785 2786
    rt->client_report_size = 1048576;
    rt->bytes_read = 0;
2787 2788 2789
    rt->has_audio = 0;
    rt->has_video = 0;
    rt->received_metadata = 0;
2790
    rt->last_bytes_read = 0;
2791
    rt->server_bw = 2500000;
2792
    rt->duration = 0;
2793

2794
    av_log(s, AV_LOG_DEBUG, "Proto = %s, path = %s, app = %s, fname = %s\n",
2795
           proto, path, rt->app, rt->playpath);
2796 2797 2798 2799
    if (!rt->listen) {
        if ((ret = gen_connect(s, rt)) < 0)
            goto fail;
    } else {
2800
        if ((ret = read_connect(s, s->priv_data)) < 0)
2801 2802
            goto fail;
    }
2803

2804 2805
    do {
        ret = get_packet(s, 1);
2806
    } while (ret == AVERROR(EAGAIN));
2807 2808
    if (ret < 0)
        goto fail;
2809

2810
    if (rt->do_reconnect) {
2811
        int i;
2812 2813 2814 2815
        ffurl_close(rt->stream);
        rt->stream       = NULL;
        rt->do_reconnect = 0;
        rt->nb_invokes   = 0;
2816 2817 2818
        for (i = 0; i < 2; i++)
            memset(rt->prev_pkt[i], 0,
                   sizeof(**rt->prev_pkt) * rt->nb_prev_pkt[i]);
2819 2820 2821 2822
        free_tracked_methods(rt);
        goto reconnect;
    }

2823
    if (rt->is_input) {
2824 2825
        // generate FLV header for demuxer
        rt->flv_size = 13;
2826 2827
        if ((ret = av_reallocp(&rt->flv_data, rt->flv_size)) < 0)
            goto fail;
2828
        rt->flv_off  = 0;
2829 2830 2831 2832 2833 2834 2835 2836 2837
        memcpy(rt->flv_data, "FLV\1\0\0\0\0\011\0\0\0\0", rt->flv_size);

        // Read packets until we reach the first A/V packet or read metadata.
        // If there was a metadata package in front of the A/V packets, we can
        // build the FLV header from this. If we do not receive any metadata,
        // the FLV decoder will allocate the needed streams when their first
        // audio or video packet arrives.
        while (!rt->has_audio && !rt->has_video && !rt->received_metadata) {
            if ((ret = get_packet(s, 0)) < 0)
2838
               goto fail;
2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849
        }

        // Either after we have read the metadata or (if there is none) the
        // first packet of an A/V stream, we have a better knowledge about the
        // streams, so set the FLV header accordingly.
        if (rt->has_audio) {
            rt->flv_data[4] |= FLV_HEADER_FLAG_HASAUDIO;
        }
        if (rt->has_video) {
            rt->flv_data[4] |= FLV_HEADER_FLAG_HASVIDEO;
        }
2850 2851 2852 2853 2854 2855 2856 2857

        // If we received the first packet of an A/V stream and no metadata but
        // the server returned a valid duration, create a fake metadata packet
        // to inform the FLV decoder about the duration.
        if (!rt->received_metadata && rt->duration > 0) {
            if ((ret = inject_fake_duration_metadata(rt)) < 0)
                goto fail;
        }
2858 2859 2860 2861
    } else {
        rt->flv_size = 0;
        rt->flv_data = NULL;
        rt->flv_off  = 0;
2862
        rt->skip_bytes = 13;
2863 2864
    }

2865
    s->max_packet_size = rt->stream->max_packet_size;
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    s->is_streamed     = 1;
    return 0;

fail:
2870
    av_dict_free(&opts);
2871
    rtmp_close(s);
2872
    return ret;
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}

static int rtmp_read(URLContext *s, uint8_t *buf, int size)
{
    RTMPContext *rt = s->priv_data;
    int orig_size = size;
    int ret;

    while (size > 0) {
        int data_left = rt->flv_size - rt->flv_off;

        if (data_left >= size) {
            memcpy(buf, rt->flv_data + rt->flv_off, size);
            rt->flv_off += size;
            return orig_size;
        }
        if (data_left > 0) {
            memcpy(buf, rt->flv_data + rt->flv_off, data_left);
            buf  += data_left;
            size -= data_left;
            rt->flv_off = rt->flv_size;
2894
            return data_left;
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        }
        if ((ret = get_packet(s, 0)) < 0)
           return ret;
    }
    return orig_size;
}

2902 2903 2904 2905 2906 2907
static int64_t rtmp_seek(URLContext *s, int stream_index, int64_t timestamp,
                         int flags)
{
    RTMPContext *rt = s->priv_data;
    int ret;
    av_log(s, AV_LOG_DEBUG,
2908
           "Seek on stream index %d at timestamp %"PRId64" with flags %08x\n",
2909 2910 2911
           stream_index, timestamp, flags);
    if ((ret = gen_seek(s, rt, timestamp)) < 0) {
        av_log(s, AV_LOG_ERROR,
2912 2913
               "Unable to send seek command on stream index %d at timestamp "
               "%"PRId64" with flags %08x\n",
2914 2915 2916 2917 2918 2919 2920 2921
               stream_index, timestamp, flags);
        return ret;
    }
    rt->flv_off = rt->flv_size;
    rt->state = STATE_SEEKING;
    return timestamp;
}

2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935
static int rtmp_pause(URLContext *s, int pause)
{
    RTMPContext *rt = s->priv_data;
    int ret;
    av_log(s, AV_LOG_DEBUG, "Pause at timestamp %d\n",
           rt->last_timestamp);
    if ((ret = gen_pause(s, rt, pause, rt->last_timestamp)) < 0) {
        av_log(s, AV_LOG_ERROR, "Unable to send pause command at timestamp %d\n",
               rt->last_timestamp);
        return ret;
    }
    return 0;
}

2936
static int rtmp_write(URLContext *s, const uint8_t *buf, int size)
2937
{
2938
    RTMPContext *rt = s->priv_data;
2939
    int size_temp = size;
2940
    int pktsize, pkttype, copy;
2941 2942
    uint32_t ts;
    const uint8_t *buf_temp = buf;
2943
    uint8_t c;
2944
    int ret;
2945 2946

    do {
2947 2948 2949 2950 2951 2952 2953 2954
        if (rt->skip_bytes) {
            int skip = FFMIN(rt->skip_bytes, size_temp);
            buf_temp       += skip;
            size_temp      -= skip;
            rt->skip_bytes -= skip;
            continue;
        }

2955
        if (rt->flv_header_bytes < RTMP_HEADER) {
2956
            const uint8_t *header = rt->flv_header;
2957
            int channel = RTMP_AUDIO_CHANNEL;
2958

2959
            copy = FFMIN(RTMP_HEADER - rt->flv_header_bytes, size_temp);
2960 2961 2962
            bytestream_get_buffer(&buf_temp, rt->flv_header + rt->flv_header_bytes, copy);
            rt->flv_header_bytes += copy;
            size_temp            -= copy;
2963
            if (rt->flv_header_bytes < RTMP_HEADER)
2964
                break;
2965

2966 2967 2968 2969 2970
            pkttype = bytestream_get_byte(&header);
            pktsize = bytestream_get_be24(&header);
            ts = bytestream_get_be24(&header);
            ts |= bytestream_get_byte(&header) << 24;
            bytestream_get_be24(&header);
2971 2972
            rt->flv_size = pktsize;

2973 2974 2975
            if (pkttype == RTMP_PT_VIDEO)
                channel = RTMP_VIDEO_CHANNEL;

2976 2977
            if (((pkttype == RTMP_PT_VIDEO || pkttype == RTMP_PT_AUDIO) && ts == 0) ||
                pkttype == RTMP_PT_NOTIFY) {
2978 2979 2980 2981
                if ((ret = ff_rtmp_check_alloc_array(&rt->prev_pkt[1],
                                                     &rt->nb_prev_pkt[1],
                                                     channel)) < 0)
                    return ret;
2982
                // Force sending a full 12 bytes header by clearing the
2983 2984
                // channel id, to make it not match a potential earlier
                // packet in the same channel.
2985
                rt->prev_pkt[1][channel].channel_id = 0;
2986 2987 2988
            }

            //this can be a big packet, it's better to send it right here
2989
            if ((ret = ff_rtmp_packet_create(&rt->out_pkt, channel,
2990 2991 2992
                                             pkttype, ts, pktsize)) < 0)
                return ret;

2993
            rt->out_pkt.extra = rt->stream_id;
2994 2995 2996
            rt->flv_data = rt->out_pkt.data;
        }

2997 2998 2999 3000
        copy = FFMIN(rt->flv_size - rt->flv_off, size_temp);
        bytestream_get_buffer(&buf_temp, rt->flv_data + rt->flv_off, copy);
        rt->flv_off += copy;
        size_temp   -= copy;
3001 3002

        if (rt->flv_off == rt->flv_size) {
3003 3004
            rt->skip_bytes = 4;

3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031
            if (rt->out_pkt.type == RTMP_PT_NOTIFY) {
                // For onMetaData and |RtmpSampleAccess packets, we want
                // @setDataFrame prepended to the packet before it gets sent.
                // However, not all RTMP_PT_NOTIFY packets (e.g., onTextData
                // and onCuePoint).
                uint8_t commandbuffer[64];
                int stringlen = 0;
                GetByteContext gbc;

                bytestream2_init(&gbc, rt->flv_data, rt->flv_size);
                if (!ff_amf_read_string(&gbc, commandbuffer, sizeof(commandbuffer),
                                        &stringlen)) {
                    if (!strcmp(commandbuffer, "onMetaData") ||
                        !strcmp(commandbuffer, "|RtmpSampleAccess")) {
                        uint8_t *ptr;
                        if ((ret = av_reallocp(&rt->out_pkt.data, rt->out_pkt.size + 16)) < 0) {
                            rt->flv_size = rt->flv_off = rt->flv_header_bytes = 0;
                            return ret;
                        }
                        memmove(rt->out_pkt.data + 16, rt->out_pkt.data, rt->out_pkt.size);
                        rt->out_pkt.size += 16;
                        ptr = rt->out_pkt.data;
                        ff_amf_write_string(&ptr, "@setDataFrame");
                    }
                }
            }

3032
            if ((ret = rtmp_send_packet(rt, &rt->out_pkt, 0)) < 0)
3033
                return ret;
3034 3035
            rt->flv_size = 0;
            rt->flv_off = 0;
3036
            rt->flv_header_bytes = 0;
3037
            rt->flv_nb_packets++;
3038
        }
3039
    } while (buf_temp - buf < size);
3040

3041 3042 3043 3044
    if (rt->flv_nb_packets < rt->flush_interval)
        return size;
    rt->flv_nb_packets = 0;

3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062
    /* set stream into nonblocking mode */
    rt->stream->flags |= AVIO_FLAG_NONBLOCK;

    /* try to read one byte from the stream */
    ret = ffurl_read(rt->stream, &c, 1);

    /* switch the stream back into blocking mode */
    rt->stream->flags &= ~AVIO_FLAG_NONBLOCK;

    if (ret == AVERROR(EAGAIN)) {
        /* no incoming data to handle */
        return size;
    } else if (ret < 0) {
        return ret;
    } else if (ret == 1) {
        RTMPPacket rpkt = { 0 };

        if ((ret = ff_rtmp_packet_read_internal(rt->stream, &rpkt,
3063
                                                rt->in_chunk_size,
3064 3065
                                                &rt->prev_pkt[0],
                                                &rt->nb_prev_pkt[0], c)) <= 0)
3066 3067 3068 3069 3070 3071 3072 3073
             return ret;

        if ((ret = rtmp_parse_result(s, rt, &rpkt)) < 0)
            return ret;

        ff_rtmp_packet_destroy(&rpkt);
    }

3074
    return size;
3075 3076
}

3077 3078 3079 3080 3081 3082
#define OFFSET(x) offsetof(RTMPContext, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
#define ENC AV_OPT_FLAG_ENCODING_PARAM

static const AVOption rtmp_options[] = {
    {"rtmp_app", "Name of application to connect to on the RTMP server", OFFSET(app), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
3083
    {"rtmp_buffer", "Set buffer time in milliseconds. The default is 3000.", OFFSET(client_buffer_time), AV_OPT_TYPE_INT, {.i64 = 3000}, 0, INT_MAX, DEC|ENC},
3084
    {"rtmp_conn", "Append arbitrary AMF data to the Connect message", OFFSET(conn), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
3085
    {"rtmp_flashver", "Version of the Flash plugin used to run the SWF player.", OFFSET(flashver), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
3086 3087
    {"rtmp_flush_interval", "Number of packets flushed in the same request (RTMPT only).", OFFSET(flush_interval), AV_OPT_TYPE_INT, {.i64 = 10}, 0, INT_MAX, ENC},
    {"rtmp_live", "Specify that the media is a live stream.", OFFSET(live), AV_OPT_TYPE_INT, {.i64 = -2}, INT_MIN, INT_MAX, DEC, "rtmp_live"},
3088 3089 3090
    {"any", "both", 0, AV_OPT_TYPE_CONST, {.i64 = -2}, 0, 0, DEC, "rtmp_live"},
    {"live", "live stream", 0, AV_OPT_TYPE_CONST, {.i64 = -1}, 0, 0, DEC, "rtmp_live"},
    {"recorded", "recorded stream", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, 0, 0, DEC, "rtmp_live"},
3091
    {"rtmp_pageurl", "URL of the web page in which the media was embedded. By default no value will be sent.", OFFSET(pageurl), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC},
3092
    {"rtmp_playpath", "Stream identifier to play or to publish", OFFSET(playpath), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
3093
    {"rtmp_subscribe", "Name of live stream to subscribe to. Defaults to rtmp_playpath.", OFFSET(subscribe), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC},
3094
    {"rtmp_swfhash", "SHA256 hash of the decompressed SWF file (32 bytes).", OFFSET(swfhash), AV_OPT_TYPE_BINARY, .flags = DEC},
3095
    {"rtmp_swfsize", "Size of the decompressed SWF file, required for SWFVerification.", OFFSET(swfsize), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, DEC},
3096
    {"rtmp_swfurl", "URL of the SWF player. By default no value will be sent", OFFSET(swfurl), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
3097
    {"rtmp_swfverify", "URL to player swf file, compute hash/size automatically.", OFFSET(swfverify), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC},
3098
    {"rtmp_tcurl", "URL of the target stream. Defaults to proto://host[:port]/app.", OFFSET(tcurl), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, DEC|ENC},
3099
    {"rtmp_listen", "Listen for incoming rtmp connections", OFFSET(listen), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtmp_listen" },
3100
    {"listen",      "Listen for incoming rtmp connections", OFFSET(listen), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, DEC, "rtmp_listen" },
3101
    {"timeout", "Maximum timeout (in seconds) to wait for incoming connections. -1 is infinite. Implies -rtmp_listen 1",  OFFSET(listen_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, DEC, "rtmp_listen" },
3102 3103 3104
    { NULL },
};

3105 3106 3107 3108 3109 3110 3111 3112
#define RTMP_PROTOCOL(flavor)                    \
static const AVClass flavor##_class = {          \
    .class_name = #flavor,                       \
    .item_name  = av_default_item_name,          \
    .option     = rtmp_options,                  \
    .version    = LIBAVUTIL_VERSION_INT,         \
};                                               \
                                                 \
3113
const URLProtocol ff_##flavor##_protocol = {     \
3114 3115 3116
    .name           = #flavor,                   \
    .url_open       = rtmp_open,                 \
    .url_read       = rtmp_read,                 \
3117
    .url_read_seek  = rtmp_seek,                 \
3118
    .url_read_pause = rtmp_pause,                \
3119 3120 3121 3122 3123
    .url_write      = rtmp_write,                \
    .url_close      = rtmp_close,                \
    .priv_data_size = sizeof(RTMPContext),       \
    .flags          = URL_PROTOCOL_FLAG_NETWORK, \
    .priv_data_class= &flavor##_class,           \
3124
};
Samuel Pitoiset's avatar
Samuel Pitoiset committed
3125

Samuel Pitoiset's avatar
Samuel Pitoiset committed
3126

3127 3128 3129 3130 3131 3132
RTMP_PROTOCOL(rtmp)
RTMP_PROTOCOL(rtmpe)
RTMP_PROTOCOL(rtmps)
RTMP_PROTOCOL(rtmpt)
RTMP_PROTOCOL(rtmpte)
RTMP_PROTOCOL(rtmpts)