avformat/rtpproto: use factorized ip functions

Signed-off-by: Marton Balint <cus@passwd.hu>

libavformat/Makefile

@@ -596,7 +596,7 @@ OBJS-$(CONFIG_RTMPS_PROTOCOL)            += rtmpproto.o rtmpdigest.o rtmppkt.o
 OBJS-$(CONFIG_RTMPT_PROTOCOL)            += rtmpproto.o rtmpdigest.o rtmppkt.o
 OBJS-$(CONFIG_RTMPTE_PROTOCOL)           += rtmpproto.o rtmpdigest.o rtmppkt.o
 OBJS-$(CONFIG_RTMPTS_PROTOCOL)           += rtmpproto.o rtmpdigest.o rtmppkt.o
-OBJS-$(CONFIG_RTP_PROTOCOL)              += rtpproto.o
+OBJS-$(CONFIG_RTP_PROTOCOL)              += rtpproto.o ip.o
 OBJS-$(CONFIG_SCTP_PROTOCOL)             += sctp.o
 OBJS-$(CONFIG_SRTP_PROTOCOL)             += srtpproto.o srtp.o
 OBJS-$(CONFIG_SUBFILE_PROTOCOL)          += subfile.o

libavformat/rtpproto.c

@@ -32,6 +32,7 @@
 #include "rtp.h"
 #include "rtpproto.h"
 #include "url.h"
+#include "ip.h"
 
 #include <stdarg.h>
 #include "internal.h"
@@ -45,8 +46,8 @@
 typedef struct RTPContext {
     const AVClass *class;
     URLContext *rtp_hd, *rtcp_hd, *fec_hd;
-    int rtp_fd, rtcp_fd, nb_ssm_include_addrs, nb_ssm_exclude_addrs;
-    struct sockaddr_storage **ssm_include_addrs, **ssm_exclude_addrs;
+    int rtp_fd, rtcp_fd;
+    IPSourceFilters filters;
     int write_to_source;
     struct sockaddr_storage last_rtp_source, last_rtcp_source;
     socklen_t last_rtp_source_len, last_rtcp_source_len;
@@ -126,45 +127,6 @@ int ff_rtp_set_remote_url(URLContext *h, const char *uri)
     return 0;
 }
 
-static struct addrinfo* rtp_resolve_host(const char *hostname, int port,
-                                         int type, int family, int flags)
-{
-    struct addrinfo hints = { 0 }, *res = 0;
-    int error;
-    char service[16];
-
-    snprintf(service, sizeof(service), "%d", port);
-    hints.ai_socktype = type;
-    hints.ai_family   = family;
-    hints.ai_flags    = flags;
-    if ((error = getaddrinfo(hostname, service, &hints, &res))) {
-        res = NULL;
-        av_log(NULL, AV_LOG_ERROR, "rtp_resolve_host: %s\n", gai_strerror(error));
-    }
-
-    return res;
-}
-
-static int compare_addr(const struct sockaddr_storage *a,
-                        const struct sockaddr_storage *b)
-{
-    if (a->ss_family != b->ss_family)
-        return 1;
-    if (a->ss_family == AF_INET) {
-        return (((const struct sockaddr_in *)a)->sin_addr.s_addr !=
-                ((const struct sockaddr_in *)b)->sin_addr.s_addr);
-    }
-
-#if HAVE_STRUCT_SOCKADDR_IN6
-    if (a->ss_family == AF_INET6) {
-        const uint8_t *s6_addr_a = ((const struct sockaddr_in6 *)a)->sin6_addr.s6_addr;
-        const uint8_t *s6_addr_b = ((const struct sockaddr_in6 *)b)->sin6_addr.s6_addr;
-        return memcmp(s6_addr_a, s6_addr_b, 16);
-    }
-#endif
-    return 1;
-}
-
 static int get_port(const struct sockaddr_storage *ss)
 {
     if (ss->ss_family == AF_INET)
@@ -186,25 +148,6 @@ static void set_port(struct sockaddr_storage *ss, int port)
 #endif
 }
 
-static int rtp_check_source_lists(RTPContext *s, struct sockaddr_storage *source_addr_ptr)
-{
-    int i;
-    if (s->nb_ssm_exclude_addrs) {
-        for (i = 0; i < s->nb_ssm_exclude_addrs; i++) {
-            if (!compare_addr(source_addr_ptr, s->ssm_exclude_addrs[i]))
-                return 1;
-        }
-    }
-    if (s->nb_ssm_include_addrs) {
-        for (i = 0; i < s->nb_ssm_include_addrs; i++) {
-            if (!compare_addr(source_addr_ptr, s->ssm_include_addrs[i]))
-                return 0;
-        }
-        return 1;
-    }
-    return 0;
-}
-
 /**
  * add option to url of the form:
  * "http://host:port/path?option1=val1&option2=val2...
@@ -252,48 +195,6 @@ static void build_udp_url(RTPContext *s,
         url_add_option(buf, buf_size, "block=%s", exclude_sources);
 }
 
-static void rtp_parse_addr_list(URLContext *h, char *buf,
-                                struct sockaddr_storage ***address_list_ptr,
-                                int *address_list_size_ptr)
-{
-    struct addrinfo *ai = NULL;
-    struct sockaddr_storage *source_addr;
-    char tmp = '\0', *p = buf, *next;
-
-    /* Resolve all of the IPs */
-
-    while (p && p[0]) {
-        next = strchr(p, ',');
-
-        if (next) {
-            tmp = *next;
-            *next = '\0';
-        }
-
-        ai = rtp_resolve_host(p, 0, SOCK_DGRAM, AF_UNSPEC, 0);
-        if (ai) {
-            source_addr = av_mallocz(sizeof(struct sockaddr_storage));
-            if (!source_addr) {
-                freeaddrinfo(ai);
-                break;
-            }
-
-            memcpy(source_addr, ai->ai_addr, ai->ai_addrlen);
-            freeaddrinfo(ai);
-            dynarray_add(address_list_ptr, address_list_size_ptr, source_addr);
-        } else {
-            av_log(h, AV_LOG_WARNING, "Unable to resolve %s\n", p);
-        }
-
-        if (next) {
-            *next = tmp;
-            p = next + 1;
-        } else {
-            p = NULL;
-        }
-    }
-}
-
 /**
  * url syntax: rtp://host:port[?option=val...]
  * option: 'ttl=n'            : set the ttl value (for multicast only)
@@ -366,17 +267,16 @@ static int rtp_open(URLContext *h, const char *uri, int flags)
         }
         if (av_find_info_tag(buf, sizeof(buf), "sources", p)) {
             av_strlcpy(include_sources, buf, sizeof(include_sources));
-
-            rtp_parse_addr_list(h, buf, &s->ssm_include_addrs, &s->nb_ssm_include_addrs);
+            ff_ip_parse_sources(h, buf, &s->filters);
         } else {
-            rtp_parse_addr_list(h, s->sources, &s->ssm_include_addrs, &s->nb_ssm_include_addrs);
+            ff_ip_parse_sources(h, s->sources, &s->filters);
             sources = s->sources;
         }
         if (av_find_info_tag(buf, sizeof(buf), "block", p)) {
             av_strlcpy(exclude_sources, buf, sizeof(exclude_sources));
-            rtp_parse_addr_list(h, buf, &s->ssm_exclude_addrs, &s->nb_ssm_exclude_addrs);
+            ff_ip_parse_blocks(h, buf, &s->filters);
         } else {
-            rtp_parse_addr_list(h, s->block, &s->ssm_exclude_addrs, &s->nb_ssm_exclude_addrs);
+            ff_ip_parse_blocks(h, s->block, &s->filters);
             block = s->block;
         }
     }
@@ -500,7 +400,7 @@ static int rtp_read(URLContext *h, uint8_t *buf, int size)
                         continue;
                     return AVERROR(EIO);
                 }
-                if (rtp_check_source_lists(s, addrs[i]))
+                if (ff_ip_check_source_lists(addrs[i], &s->filters))
                     continue;
                 return len;
             }
@@ -603,14 +503,8 @@ static int rtp_write(URLContext *h, const uint8_t *buf, int size)
 static int rtp_close(URLContext *h)
 {
     RTPContext *s = h->priv_data;
-    int i;
-
-    for (i = 0; i < s->nb_ssm_include_addrs; i++)
-        av_freep(&s->ssm_include_addrs[i]);
-    av_freep(&s->ssm_include_addrs);
-    for (i = 0; i < s->nb_ssm_exclude_addrs; i++)
-        av_freep(&s->ssm_exclude_addrs[i]);
-    av_freep(&s->ssm_exclude_addrs);
+
+    ff_ip_reset_filters(&s->filters);
 
     ffurl_close(s->rtp_hd);
     ffurl_close(s->rtcp_hd);