X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Frtpproto.c;h=d5ecfc8898c46284625a353a68366edb113e3c17;hb=fcae9f212a6001d966c52dc22cd4b22e9851b428;hp=03794ae1ce2a5d1a28c205fdfb20b1c24c1bb0b9;hpb=32b83aeec1a129d6eef2e89c7f107c614dfb4574;p=ffmpeg diff --git a/libavformat/rtpproto.c b/libavformat/rtpproto.c index 03794ae1ce2..d5ecfc8898c 100644 --- a/libavformat/rtpproto.c +++ b/libavformat/rtpproto.c @@ -28,10 +28,10 @@ #include "libavutil/avstring.h" #include "avformat.h" #include "avio_internal.h" -#include "rtpdec.h" +#include "rtp.h" +#include "rtpproto.h" #include "url.h" -#include #include #include "internal.h" #include "network.h" @@ -40,14 +40,14 @@ #if HAVE_POLL_H #include #endif -#include - -#define RTP_TX_BUF_SIZE (64 * 1024) -#define RTP_RX_BUF_SIZE (128 * 1024) typedef struct RTPContext { URLContext *rtp_hd, *rtcp_hd; - int rtp_fd, rtcp_fd; + int rtp_fd, rtcp_fd, nb_ssm_include_addrs, nb_ssm_exclude_addrs; + struct sockaddr_storage **ssm_include_addrs, **ssm_exclude_addrs; + int write_to_source; + struct sockaddr_storage last_rtp_source, last_rtcp_source; + socklen_t last_rtp_source_len, last_rtcp_source_len; } RTPContext; /** @@ -64,22 +64,109 @@ int ff_rtp_set_remote_url(URLContext *h, const char *uri) { RTPContext *s = h->priv_data; char hostname[256]; - int port; + int port, rtcp_port; + const char *p; char buf[1024]; char path[1024]; av_url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, path, sizeof(path), uri); + rtcp_port = port + 1; + + p = strchr(uri, '?'); + if (p) { + if (av_find_info_tag(buf, sizeof(buf), "rtcpport", p)) { + rtcp_port = strtol(buf, NULL, 10); + } + } ff_url_join(buf, sizeof(buf), "udp", NULL, hostname, port, "%s", path); ff_udp_set_remote_url(s->rtp_hd, buf); - ff_url_join(buf, sizeof(buf), "udp", NULL, hostname, port + 1, "%s", path); + ff_url_join(buf, sizeof(buf), "udp", NULL, hostname, rtcp_port, "%s", path); ff_udp_set_remote_url(s->rtcp_hd, buf); 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) + return ntohs(((const struct sockaddr_in *)ss)->sin_port); +#if HAVE_STRUCT_SOCKADDR_IN6 + if (ss->ss_family == AF_INET6) + return ntohs(((const struct sockaddr_in6 *)ss)->sin6_port); +#endif + return 0; +} + +static void set_port(struct sockaddr_storage *ss, int port) +{ + if (ss->ss_family == AF_INET) + ((struct sockaddr_in *)ss)->sin_port = htons(port); +#if HAVE_STRUCT_SOCKADDR_IN6 + else if (ss->ss_family == AF_INET6) + ((struct sockaddr_in6 *)ss)->sin6_port = htons(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: @@ -104,7 +191,9 @@ static av_printf_format(3, 4) void url_add_option(char *buf, int buf_size, const static void build_udp_url(char *buf, int buf_size, const char *hostname, int port, int local_port, int ttl, - int max_packet_size, int connect) + int max_packet_size, int connect, + const char *include_sources, + const char *exclude_sources) { ff_url_join(buf, buf_size, "udp", NULL, hostname, port, NULL); if (local_port >= 0) @@ -115,6 +204,52 @@ static void build_udp_url(char *buf, int buf_size, url_add_option(buf, buf_size, "pkt_size=%d", max_packet_size); if (connect) url_add_option(buf, buf_size, "connect=1"); + if (include_sources && include_sources[0]) + url_add_option(buf, buf_size, "sources=%s", include_sources); + if (exclude_sources && exclude_sources[0]) + 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; + } + } } /** @@ -125,6 +260,9 @@ static void build_udp_url(char *buf, int buf_size, * 'localrtcpport=n' : set the local rtcp port to n * 'pkt_size=n' : set max packet size * 'connect=0/1' : do a connect() on the UDP socket + * 'sources=ip[,ip]' : list allowed source IP addresses + * 'block=ip[,ip]' : list disallowed source IP addresses + * 'write_to_source=0/1' : send packets to the source address of the latest received packet * deprecated option: * 'localport=n' : set the local port to n * @@ -140,7 +278,7 @@ static int rtp_open(URLContext *h, const char *uri, int flags) int rtp_port, rtcp_port, ttl, connect, local_rtp_port, local_rtcp_port, max_packet_size; - char hostname[256]; + char hostname[256], include_sources[1024] = "", exclude_sources[1024] = ""; char buf[1024]; char path[1024]; const char *p; @@ -178,11 +316,22 @@ static int rtp_open(URLContext *h, const char *uri, int flags) if (av_find_info_tag(buf, sizeof(buf), "connect", p)) { connect = strtol(buf, NULL, 10); } + if (av_find_info_tag(buf, sizeof(buf), "write_to_source", p)) { + s->write_to_source = strtol(buf, NULL, 10); + } + 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); + } + 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); + } } build_udp_url(buf, sizeof(buf), hostname, rtp_port, local_rtp_port, ttl, max_packet_size, - connect); + connect, include_sources, exclude_sources); if (ffurl_open(&s->rtp_hd, buf, flags, &h->interrupt_callback, NULL) < 0) goto fail; if (local_rtp_port>=0 && local_rtcp_port<0) @@ -190,7 +339,7 @@ static int rtp_open(URLContext *h, const char *uri, int flags) build_udp_url(buf, sizeof(buf), hostname, rtcp_port, local_rtcp_port, ttl, max_packet_size, - connect); + connect, include_sources, exclude_sources); if (ffurl_open(&s->rtcp_hd, buf, flags, &h->interrupt_callback, NULL) < 0) goto fail; @@ -214,48 +363,41 @@ static int rtp_open(URLContext *h, const char *uri, int flags) static int rtp_read(URLContext *h, uint8_t *buf, int size) { RTPContext *s = h->priv_data; - struct sockaddr_storage from; - socklen_t from_len; - int len, n; + int len, n, i; struct pollfd p[2] = {{s->rtp_fd, POLLIN, 0}, {s->rtcp_fd, POLLIN, 0}}; + int poll_delay = h->flags & AVIO_FLAG_NONBLOCK ? 0 : 100; + struct sockaddr_storage *addrs[2] = { &s->last_rtp_source, &s->last_rtcp_source }; + socklen_t *addr_lens[2] = { &s->last_rtp_source_len, &s->last_rtcp_source_len }; for(;;) { if (ff_check_interrupt(&h->interrupt_callback)) return AVERROR_EXIT; - /* build fdset to listen to RTP and RTCP packets */ - n = poll(p, 2, 100); + n = poll(p, 2, poll_delay); if (n > 0) { - /* first try RTCP */ - if (p[1].revents & POLLIN) { - from_len = sizeof(from); - len = recvfrom (s->rtcp_fd, buf, size, 0, - (struct sockaddr *)&from, &from_len); + /* first try RTCP, then RTP */ + for (i = 1; i >= 0; i--) { + if (!(p[i].revents & POLLIN)) + continue; + *addr_lens[i] = sizeof(*addrs[i]); + len = recvfrom(p[i].fd, buf, size, 0, + (struct sockaddr *)addrs[i], addr_lens[i]); if (len < 0) { if (ff_neterrno() == AVERROR(EAGAIN) || ff_neterrno() == AVERROR(EINTR)) continue; return AVERROR(EIO); } - break; - } - /* then RTP */ - if (p[0].revents & POLLIN) { - from_len = sizeof(from); - len = recvfrom (s->rtp_fd, buf, size, 0, - (struct sockaddr *)&from, &from_len); - if (len < 0) { - if (ff_neterrno() == AVERROR(EAGAIN) || - ff_neterrno() == AVERROR(EINTR)) - continue; - return AVERROR(EIO); - } - break; + if (rtp_check_source_lists(s, addrs[i])) + continue; + return len; } } else if (n < 0) { if (ff_neterrno() == AVERROR(EINTR)) continue; return AVERROR(EIO); } + if (h->flags & AVIO_FLAG_NONBLOCK) + return AVERROR(EAGAIN); } return len; } @@ -266,7 +408,61 @@ static int rtp_write(URLContext *h, const uint8_t *buf, int size) int ret; URLContext *hd; - if (buf[1] >= RTCP_SR && buf[1] <= RTCP_APP) { + if (size < 2) + return AVERROR(EINVAL); + + if (s->write_to_source) { + int fd; + struct sockaddr_storage *source, temp_source; + socklen_t *source_len, temp_len; + if (!s->last_rtp_source.ss_family && !s->last_rtcp_source.ss_family) { + av_log(h, AV_LOG_ERROR, + "Unable to send packet to source, no packets received yet\n"); + // Intentionally not returning an error here + return size; + } + + if (RTP_PT_IS_RTCP(buf[1])) { + fd = s->rtcp_fd; + source = &s->last_rtcp_source; + source_len = &s->last_rtcp_source_len; + } else { + fd = s->rtp_fd; + source = &s->last_rtp_source; + source_len = &s->last_rtp_source_len; + } + if (!source->ss_family) { + source = &temp_source; + source_len = &temp_len; + if (RTP_PT_IS_RTCP(buf[1])) { + temp_source = s->last_rtp_source; + temp_len = s->last_rtp_source_len; + set_port(source, get_port(source) + 1); + av_log(h, AV_LOG_INFO, + "Not received any RTCP packets yet, inferring peer port " + "from the RTP port\n"); + } else { + temp_source = s->last_rtcp_source; + temp_len = s->last_rtcp_source_len; + set_port(source, get_port(source) - 1); + av_log(h, AV_LOG_INFO, + "Not received any RTP packets yet, inferring peer port " + "from the RTCP port\n"); + } + } + + if (!(h->flags & AVIO_FLAG_NONBLOCK)) { + ret = ff_network_wait_fd(fd, 1); + if (ret < 0) + return ret; + } + ret = sendto(fd, buf, size, 0, (struct sockaddr *) source, + *source_len); + + return ret < 0 ? ff_neterrno() : ret; + } + + if (RTP_PT_IS_RTCP(buf[1])) { /* RTCP payload type */ hd = s->rtcp_hd; } else { @@ -281,6 +477,14 @@ 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_free(s->ssm_include_addrs[i]); + av_freep(&s->ssm_include_addrs); + for (i = 0; i < s->nb_ssm_exclude_addrs; i++) + av_free(s->ssm_exclude_addrs[i]); + av_freep(&s->ssm_exclude_addrs); ffurl_close(s->rtp_hd); ffurl_close(s->rtcp_hd); @@ -317,18 +521,27 @@ static int rtp_get_file_handle(URLContext *h) return s->rtp_fd; } -int ff_rtp_get_rtcp_file_handle(URLContext *h) { +static int rtp_get_multi_file_handle(URLContext *h, int **handles, + int *numhandles) +{ RTPContext *s = h->priv_data; - return s->rtcp_fd; + int *hs = *handles = av_malloc(sizeof(**handles) * 2); + if (!hs) + return AVERROR(ENOMEM); + hs[0] = s->rtp_fd; + hs[1] = s->rtcp_fd; + *numhandles = 2; + return 0; } URLProtocol ff_rtp_protocol = { - .name = "rtp", - .url_open = rtp_open, - .url_read = rtp_read, - .url_write = rtp_write, - .url_close = rtp_close, - .url_get_file_handle = rtp_get_file_handle, - .priv_data_size = sizeof(RTPContext), - .flags = URL_PROTOCOL_FLAG_NETWORK, + .name = "rtp", + .url_open = rtp_open, + .url_read = rtp_read, + .url_write = rtp_write, + .url_close = rtp_close, + .url_get_file_handle = rtp_get_file_handle, + .url_get_multi_file_handle = rtp_get_multi_file_handle, + .priv_data_size = sizeof(RTPContext), + .flags = URL_PROTOCOL_FLAG_NETWORK, };