#include "libavutil/parseutils.h"
#include "libavutil/avstring.h"
+#include "libavutil/opt.h"
#include "avformat.h"
#include "avio_internal.h"
-#include "rtpdec.h"
+#include "rtp.h"
+#include "rtpproto.h"
#include "url.h"
#include <stdarg.h>
#endif
typedef struct RTPContext {
+ const AVClass *class;
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;
+ int ttl;
+ int buffer_size;
+ int rtcp_port, local_rtpport, local_rtcpport;
+ int connect;
+ int pkt_size;
+ char *sources;
+ char *block;
} RTPContext;
+#define OFFSET(x) offsetof(RTPContext, x)
+#define D AV_OPT_FLAG_DECODING_PARAM
+#define E AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+ { "ttl", "Time to live (in milliseconds, multicast only)", OFFSET(ttl), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
+ { "buffer_size", "Send/Receive buffer size (in bytes)", OFFSET(buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
+ { "rtcp_port", "Custom rtcp port", OFFSET(rtcp_port), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
+ { "local_rtpport", "Local rtp port", OFFSET(local_rtpport), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
+ { "local_rtcpport", "Local rtcp port", OFFSET(local_rtcpport), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
+ { "connect", "Connect socket", OFFSET(connect), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = D|E },
+ { "write_to_source", "Send packets to the source address of the latest received packet", OFFSET(write_to_source), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = D|E },
+ { "pkt_size", "Maximum packet size", OFFSET(pkt_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
+ { "sources", "Source list", OFFSET(sources), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
+ { "block", "Block list", OFFSET(block), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = D|E },
+ { NULL }
+};
+
+static const AVClass rtp_class = {
+ .class_name = "rtp",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
/**
* 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
{
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:
va_end(ap);
}
-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)
+static void build_udp_url(RTPContext *s,
+ char *buf, int buf_size,
+ const char *hostname,
+ int port, int local_port,
+ const char *include_sources,
+ const char *exclude_sources)
{
ff_url_join(buf, buf_size, "udp", NULL, hostname, port, NULL);
if (local_port >= 0)
url_add_option(buf, buf_size, "localport=%d", local_port);
- if (ttl >= 0)
- url_add_option(buf, buf_size, "ttl=%d", ttl);
- if (max_packet_size >=0)
- url_add_option(buf, buf_size, "pkt_size=%d", max_packet_size);
- if (connect)
+ if (s->ttl >= 0)
+ url_add_option(buf, buf_size, "ttl=%d", s->ttl);
+ if (s->buffer_size >= 0)
+ url_add_option(buf, buf_size, "buffer_size=%d", s->buffer_size);
+ if (s->pkt_size >= 0)
+ url_add_option(buf, buf_size, "pkt_size=%d", s->pkt_size);
+ if (s->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;
+ }
+ }
}
/**
* '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
*
static int rtp_open(URLContext *h, const char *uri, int flags)
{
RTPContext *s = h->priv_data;
- int rtp_port, rtcp_port,
- ttl, connect,
- local_rtp_port, local_rtcp_port, max_packet_size;
- char hostname[256];
+ int rtp_port;
+ char hostname[256], include_sources[1024] = "", exclude_sources[1024] = "";
+ char *sources = include_sources, *block = exclude_sources;
char buf[1024];
char path[1024];
const char *p;
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;
- connect = 0;
+ if (s->rtcp_port < 0)
+ s->rtcp_port = rtp_port + 1;
p = strchr(uri, '?');
if (p) {
if (av_find_info_tag(buf, sizeof(buf), "ttl", p)) {
- ttl = strtol(buf, NULL, 10);
+ s->ttl = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "rtcpport", p)) {
- rtcp_port = strtol(buf, NULL, 10);
+ s->rtcp_port = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "localport", p)) {
- local_rtp_port = strtol(buf, NULL, 10);
+ s->local_rtpport = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "localrtpport", p)) {
- local_rtp_port = strtol(buf, NULL, 10);
+ s->local_rtpport = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "localrtcpport", p)) {
- local_rtcp_port = strtol(buf, NULL, 10);
+ s->local_rtcpport = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
- max_packet_size = strtol(buf, NULL, 10);
+ s->pkt_size = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "connect", p)) {
- connect = strtol(buf, NULL, 10);
+ s->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);
+ } else {
+ rtp_parse_addr_list(h, s->sources, &s->ssm_include_addrs, &s->nb_ssm_include_addrs);
+ 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);
+ } else {
+ rtp_parse_addr_list(h, s->block, &s->ssm_exclude_addrs, &s->nb_ssm_exclude_addrs);
+ block = s->block;
}
}
- build_udp_url(buf, sizeof(buf),
- hostname, rtp_port, local_rtp_port, ttl, max_packet_size,
- connect);
- if (ffurl_open(&s->rtp_hd, buf, flags, &h->interrupt_callback, NULL) < 0)
+ build_udp_url(s, buf, sizeof(buf),
+ hostname, rtp_port, s->local_rtpport, sources, block);
+ if (ffurl_open(&s->rtp_hd, buf, flags, &h->interrupt_callback, NULL,
+ h->protocols, h) < 0)
goto fail;
- if (local_rtp_port>=0 && local_rtcp_port<0)
- local_rtcp_port = ff_udp_get_local_port(s->rtp_hd) + 1;
+ if (s->local_rtpport >= 0 && s->local_rtcpport < 0)
+ s->local_rtcpport = ff_udp_get_local_port(s->rtp_hd) + 1;
- build_udp_url(buf, sizeof(buf),
- hostname, rtcp_port, local_rtcp_port, ttl, max_packet_size,
- connect);
- if (ffurl_open(&s->rtcp_hd, buf, flags, &h->interrupt_callback, NULL) < 0)
+ build_udp_url(s, buf, sizeof(buf),
+ hostname, s->rtcp_port, s->local_rtcpport, sources, block);
+ if (ffurl_open(&s->rtcp_hd, buf, flags, &h->interrupt_callback, NULL,
+ h->protocols, h) < 0)
goto fail;
/* just to ease handle access. XXX: need to suppress direct handle
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;
}
int ret;
URLContext *hd;
+ if (size < 2)
+ return AVERROR(EINVAL);
+
+ if ((buf[0] & 0xc0) != (RTP_VERSION << 6))
+ av_log(h, AV_LOG_WARNING, "Data doesn't look like RTP packets, "
+ "make sure the RTP muxer is used\n");
+
+ 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;
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);
return 0;
}
-URLProtocol ff_rtp_protocol = {
+const URLProtocol ff_rtp_protocol = {
.name = "rtp",
.url_open = rtp_open,
.url_read = rtp_read,
.url_get_multi_file_handle = rtp_get_multi_file_handle,
.priv_data_size = sizeof(RTPContext),
.flags = URL_PROTOCOL_FLAG_NETWORK,
+ .priv_data_class = &rtp_class,
};
projects / ffmpeg / blobdiff