static int sdp_get_address(char *dest_addr, int size, int *ttl, const char *url) { int port; const char *p; char proto[32]; ff_url_split(proto, sizeof(proto), NULL, 0, dest_addr, size, &port, NULL, 0, url); *ttl = 0; if (strcmp(proto, "rtp")) { /* The url isn't for the actual rtp sessions, * don't parse out anything else than the destination. */ return 0; } p = strchr(url, '?'); if (p) { char buff[64]; int is_multicast = find_info_tag(buff, sizeof(buff), "multicast", p); if (is_multicast) { if (find_info_tag(buff, sizeof(buff), "ttl", p)) { *ttl = strtol(buff, NULL, 10); } else { *ttl = 5; } } } return port; }
/** * If no filename is given to av_open_input_file because you want to * get the local port first, then you must call this function to set * the remote server address. * * url syntax: udp://host:port[?option=val...] * option: 'ttl=n' : set the ttl value (for multicast only) * 'localport=n' : set the local port * 'pkt_size=n' : set max packet size * 'reuse=1' : enable reusing the socket * * @param h media file context * @param uri of the remote server * @return zero if no error. */ int udp_set_remote_url(URLContext *h, const char *uri) { UDPContext *s = h->priv_data; char hostname[256], buf[10]; int port; const char *p; av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); /* set the destination address */ s->dest_addr_len = udp_set_url(&s->dest_addr, hostname, port); if (s->dest_addr_len < 0) { return AVERROR(EIO); } s->is_multicast = ff_is_multicast_address((struct sockaddr*) &s->dest_addr); p = strchr(uri, '?'); if (p) { if (find_info_tag(buf, sizeof(buf), "connect", p)) { int was_connected = s->is_connected; s->is_connected = strtol(buf, NULL, 10); if (s->is_connected && !was_connected) { if (connect(s->udp_fd, (struct sockaddr *) &s->dest_addr, s->dest_addr_len)) { s->is_connected = 0; av_log(NULL, AV_LOG_ERROR, "connect: %s\n", strerror(errno)); return AVERROR(EIO); } } } } return 0; }
/* return non zero if error */ static int udp_open(URLContext *h, const char *uri, int flags) { char hostname[1024]; int port, udp_fd = -1, tmp, bind_ret = -1; UDPContext *s = NULL; int is_output; const char *p; char buf[256]; #if !CONFIG_IPV6 struct sockaddr_in my_addr; #else struct sockaddr_storage my_addr; #endif int len; h->is_streamed = 1; h->max_packet_size = 1472; is_output = (flags & URL_WRONLY); if(!ff_network_init()) return AVERROR(EIO); s = av_mallocz(sizeof(UDPContext)); if (!s) return AVERROR(ENOMEM); h->priv_data = s; s->ttl = 16; s->buffer_size = is_output ? UDP_TX_BUF_SIZE : UDP_MAX_PKT_SIZE; p = strchr(uri, '?'); if (p) { s->reuse_socket = find_info_tag(buf, sizeof(buf), "reuse", p); if (find_info_tag(buf, sizeof(buf), "ttl", p)) { s->ttl = strtol(buf, NULL, 10); } if (find_info_tag(buf, sizeof(buf), "localport", p)) { s->local_port = strtol(buf, NULL, 10); } if (find_info_tag(buf, sizeof(buf), "pkt_size", p)) { h->max_packet_size = strtol(buf, NULL, 10); } if (find_info_tag(buf, sizeof(buf), "buffer_size", p)) { s->buffer_size = strtol(buf, NULL, 10); } } /* fill the dest addr */ url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); /* XXX: fix url_split */ if (hostname[0] == '\0' || hostname[0] == '?') { /* only accepts null hostname if input */ if (flags & URL_WRONLY) goto fail; } else { udp_set_remote_url(h, uri); } if (s->is_multicast && !(h->flags & URL_WRONLY)) s->local_port = port; udp_fd = udp_socket_create(s, &my_addr, &len); if (udp_fd < 0) goto fail; if (s->reuse_socket) if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0) goto fail; /* the bind is needed to give a port to the socket now */ /* if multicast, try the multicast address bind first */ if (s->is_multicast && !(h->flags & URL_WRONLY)) { bind_ret = bind(udp_fd,(struct sockaddr *)&s->dest_addr, len); } /* bind to the local address if not multicast or if the multicast * bind failed */ if (bind_ret < 0 && bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0) goto fail; len = sizeof(my_addr); getsockname(udp_fd, (struct sockaddr *)&my_addr, &len); s->local_port = udp_port(&my_addr, len); if (s->is_multicast) { if (h->flags & URL_WRONLY) { /* output */ if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0) goto fail; } else { /* input */ if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0) goto fail; } } if (is_output) { /* limit the tx buf size to limit latency */ tmp = s->buffer_size; if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) { av_log(NULL, AV_LOG_ERROR, "setsockopt(SO_SNDBUF): %s\n", strerror(errno)); goto fail; } } else { /* set udp recv buffer size to the largest possible udp packet size to * avoid losing data on OSes that set this too low by default. */ tmp = s->buffer_size; if (setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp)) < 0) { av_log(NULL, AV_LOG_WARNING, "setsockopt(SO_RECVBUF): %s\n", strerror(errno)); } /* make the socket non-blocking */ ff_socket_nonblock(udp_fd, 1); } s->udp_fd = udp_fd; return 0; fail: if (udp_fd >= 0) closesocket(udp_fd); av_free(s); return AVERROR(EIO); }
/* return non zero if error */ static int udp_open(URLContext *h, const char *uri, int flags) { char hostname[1024]; int port, udp_fd = -1, tmp; UDPContext *s = NULL; int is_output; const char *p; char buf[256]; #ifndef CONFIG_IPV6 struct sockaddr_in my_addr, my_addr1; int len; #endif h->is_streamed = 1; h->max_packet_size = 1472; is_output = (flags & URL_WRONLY); s = av_malloc(sizeof(UDPContext)); if (!s) return -ENOMEM; h->priv_data = s; s->ttl = 16; s->is_multicast = 0; s->local_port = 0; p = strchr(uri, '?'); if (p) { s->is_multicast = find_info_tag(buf, sizeof(buf), "multicast", p); if (find_info_tag(buf, sizeof(buf), "ttl", p)) { s->ttl = strtol(buf, NULL, 10); } if (find_info_tag(buf, sizeof(buf), "localport", p)) { s->local_port = strtol(buf, NULL, 10); } if (find_info_tag(buf, sizeof(buf), "pkt_size", p)) { h->max_packet_size = strtol(buf, NULL, 10); } } /* fill the dest addr */ url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri); /* XXX: fix url_split */ if (hostname[0] == '\0' || hostname[0] == '?') { /* only accepts null hostname if input */ if (s->is_multicast || (flags & URL_WRONLY)) goto fail; } else { udp_set_remote_url(h, uri); } #ifndef CONFIG_IPV6 udp_fd = socket(PF_INET, SOCK_DGRAM, 0); if (udp_fd < 0) goto fail; my_addr.sin_family = AF_INET; my_addr.sin_addr.s_addr = htonl (INADDR_ANY); if (s->is_multicast && !(h->flags & URL_WRONLY)) { /* special case: the bind must be done on the multicast address port */ my_addr.sin_port = s->dest_addr.sin_port; } else { my_addr.sin_port = htons(s->local_port); } /* the bind is needed to give a port to the socket now */ if (bind(udp_fd,(struct sockaddr *)&my_addr, sizeof(my_addr)) < 0) goto fail; len = sizeof(my_addr1); getsockname(udp_fd, (struct sockaddr *)&my_addr1, &len); s->local_port = ntohs(my_addr1.sin_port); #ifndef CONFIG_BEOS_NETSERVER if (s->is_multicast) { if (h->flags & URL_WRONLY) { /* output */ if (setsockopt(udp_fd, IPPROTO_IP, IP_MULTICAST_TTL, &s->ttl, sizeof(s->ttl)) < 0) { perror("IP_MULTICAST_TTL"); goto fail; } } else { /* input */ memset(&s->mreq, 0, sizeof(s->mreq)); s->mreq.imr_multiaddr = s->dest_addr.sin_addr; s->mreq.imr_interface.s_addr = htonl (INADDR_ANY); if (setsockopt(udp_fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, &s->mreq, sizeof(s->mreq)) < 0) { perror("rtp: IP_ADD_MEMBERSHIP"); goto fail; } } } #endif #else if (s->is_multicast && !(h->flags & URL_WRONLY)) s->local_port = port; udp_fd = udp_ipv6_set_local(h); if (udp_fd < 0) goto fail; #ifndef CONFIG_BEOS_NETSERVER if (s->is_multicast) { if (h->flags & URL_WRONLY) { if (udp_ipv6_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0) goto fail; } else { if (udp_ipv6_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0) goto fail; } } #endif #endif if (is_output) { /* limit the tx buf size to limit latency */ tmp = UDP_TX_BUF_SIZE; if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) { perror("setsockopt sndbuf"); goto fail; } } s->udp_fd = udp_fd; return 0; fail: if (udp_fd >= 0) #ifdef CONFIG_BEOS_NETSERVER closesocket(udp_fd); #else close(udp_fd); #endif av_free(s); return AVERROR_IO; }
/* * url syntax: rtp://host:port[?option=val...] * option: 'multicast=1' : enable multicast * 'ttl=n' : set the ttl value (for multicast only) * 'localport=n' : set the local port to n * */ static int rtp_open(URLContext *h, const char *uri, int flags) { RTPContext *s; int port, is_output, is_multicast, ttl, local_port; char hostname[256]; char buf[1024]; char path[1024]; const char *p; is_output = (flags & URL_WRONLY); s = av_mallocz(sizeof(RTPContext)); if (!s) return AVERROR(ENOMEM); h->priv_data = s; url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, path, sizeof(path), uri); /* extract parameters */ is_multicast = 0; ttl = -1; local_port = -1; p = strchr(uri, '?'); if (p) { is_multicast = find_info_tag(buf, sizeof(buf), "multicast", p); if (find_info_tag(buf, sizeof(buf), "ttl", p)) { ttl = strtol(buf, NULL, 10); } if (find_info_tag(buf, sizeof(buf), "localport", p)) { local_port = strtol(buf, NULL, 10); } } build_udp_url(buf, sizeof(buf), hostname, port, local_port, is_multicast, ttl); if (url_open(&s->rtp_hd, buf, flags) < 0) goto fail; local_port = udp_get_local_port(s->rtp_hd); /* XXX: need to open another connexion if the port is not even */ /* well, should suppress localport in path */ build_udp_url(buf, sizeof(buf), hostname, port + 1, local_port + 1, is_multicast, ttl); if (url_open(&s->rtcp_hd, buf, flags) < 0) goto fail; /* just to ease handle access. XXX: need to suppress direct handle access */ s->rtp_fd = udp_get_file_handle(s->rtp_hd); s->rtcp_fd = udp_get_file_handle(s->rtcp_hd); h->max_packet_size = url_get_max_packet_size(s->rtp_hd); h->is_streamed = 1; return 0; fail: if (s->rtp_hd) url_close(s->rtp_hd); if (s->rtcp_hd) url_close(s->rtcp_hd); av_free(s); return AVERROR_IO; }
static int rtp_open(URLContext *h, const char *uri, int flags) { RTPContext *s; int rtp_port, rtcp_port, is_output, ttl, local_rtp_port, local_rtcp_port, max_packet_size; char hostname[256]; char buf[1024]; char path[1024]; const char *p; is_output = (flags & URL_WRONLY); s = av_mallocz(sizeof(RTPContext)); if (!s) return AVERROR(ENOMEM); h->priv_data = s; av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &rtp_port, path, sizeof(path), uri); /* extract parameters */ ttl = -1; rtcp_port = rtp_port+1; local_rtp_port = -1; local_rtcp_port = -1; max_packet_size = -1; p = strchr(uri, '?'); if (p) { if (find_info_tag(buf, sizeof(buf), "ttl", p)) { ttl = strtol(buf, NULL, 10); } if (find_info_tag(buf, sizeof(buf), "rtcpport", p)) { rtcp_port = strtol(buf, NULL, 10); } if (find_info_tag(buf, sizeof(buf), "localport", p)) { local_rtp_port = strtol(buf, NULL, 10); } if (find_info_tag(buf, sizeof(buf), "localrtpport", p)) { local_rtp_port = strtol(buf, NULL, 10); } if (find_info_tag(buf, sizeof(buf), "localrtcpport", p)) { local_rtcp_port = strtol(buf, NULL, 10); } if (find_info_tag(buf, sizeof(buf), "pkt_size", p)) { max_packet_size = strtol(buf, NULL, 10); } } build_udp_url(buf, sizeof(buf), hostname, rtp_port, local_rtp_port, ttl, max_packet_size); if (url_open(&s->rtp_hd, buf, flags) < 0) goto fail; if (local_rtp_port>=0 && local_rtcp_port<0) local_rtcp_port = udp_get_local_port(s->rtp_hd) + 1; build_udp_url(buf, sizeof(buf), hostname, rtcp_port, local_rtcp_port, ttl, max_packet_size); if (url_open(&s->rtcp_hd, buf, flags) < 0) goto fail; /* just to ease handle access. XXX: need to suppress direct handle access */ s->rtp_fd = url_get_file_handle(s->rtp_hd); s->rtcp_fd = url_get_file_handle(s->rtcp_hd); h->max_packet_size = url_get_max_packet_size(s->rtp_hd); h->is_streamed = 1; return 0; fail: if (s->rtp_hd) url_close(s->rtp_hd); if (s->rtcp_hd) url_close(s->rtcp_hd); av_free(s); return AVERROR(EIO); }