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Diffstat (limited to 'contrib/ffmpeg/libavformat/udp.c')
-rw-r--r--contrib/ffmpeg/libavformat/udp.c492
1 files changed, 492 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavformat/udp.c b/contrib/ffmpeg/libavformat/udp.c
new file mode 100644
index 000000000..bbf8ca2ec
--- /dev/null
+++ b/contrib/ffmpeg/libavformat/udp.c
@@ -0,0 +1,492 @@
+/*
+ * UDP prototype streaming system
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
+ *
+ * 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
+ */
+#include "avformat.h"
+#include <unistd.h>
+#include "network.h"
+
+#ifndef IPV6_ADD_MEMBERSHIP
+#define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
+#define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
+#endif
+
+typedef struct {
+ int udp_fd;
+ int ttl;
+ int is_multicast;
+ int local_port;
+ int reuse_socket;
+#ifndef CONFIG_IPV6
+ struct ip_mreq mreq;
+ struct sockaddr_in dest_addr;
+#else
+ struct sockaddr_storage dest_addr;
+ size_t dest_addr_len;
+#endif
+} UDPContext;
+
+#define UDP_TX_BUF_SIZE 32768
+
+#ifdef CONFIG_IPV6
+
+static int udp_ipv6_is_multicast_address(const struct sockaddr *addr) {
+ if (addr->sa_family == AF_INET)
+ return IN_MULTICAST(ntohl(((struct sockaddr_in *)addr)->sin_addr.s_addr));
+ if (addr->sa_family == AF_INET6)
+ return IN6_IS_ADDR_MULTICAST(&((struct sockaddr_in6 *)addr)->sin6_addr);
+ return -1;
+}
+
+static int udp_ipv6_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr) {
+ if (addr->sa_family == AF_INET) {
+ if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
+ perror("setsockopt(IP_MULTICAST_TTL)");
+ return -1;
+ }
+ }
+ if (addr->sa_family == AF_INET6) {
+ if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
+ perror("setsockopt(IPV6_MULTICAST_HOPS)");
+ return -1;
+ }
+ }
+ return 0;
+}
+
+static int udp_ipv6_join_multicast_group(int sockfd, struct sockaddr *addr) {
+ struct ip_mreq mreq;
+ struct ipv6_mreq mreq6;
+ if (addr->sa_family == AF_INET) {
+ mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
+ mreq.imr_interface.s_addr= INADDR_ANY;
+ if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
+ perror("setsockopt(IP_ADD_MEMBERSHIP)");
+ return -1;
+ }
+ }
+ if (addr->sa_family == AF_INET6) {
+ memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
+ mreq6.ipv6mr_interface= 0;
+ if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
+ perror("setsockopt(IPV6_ADD_MEMBERSHIP)");
+ return -1;
+ }
+ }
+ return 0;
+}
+
+static int udp_ipv6_leave_multicast_group(int sockfd, struct sockaddr *addr) {
+ struct ip_mreq mreq;
+ struct ipv6_mreq mreq6;
+ if (addr->sa_family == AF_INET) {
+ mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
+ mreq.imr_interface.s_addr= INADDR_ANY;
+ if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
+ perror("setsockopt(IP_DROP_MEMBERSHIP)");
+ return -1;
+ }
+ }
+ if (addr->sa_family == AF_INET6) {
+ memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
+ mreq6.ipv6mr_interface= 0;
+ if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
+ perror("setsockopt(IPV6_DROP_MEMBERSHIP)");
+ return -1;
+ }
+ }
+ return 0;
+}
+
+static struct addrinfo* udp_ipv6_resolve_host(const char *hostname, int port, int type, int family, int flags) {
+ struct addrinfo hints, *res = 0;
+ int error;
+ char sport[16];
+ const char *node = 0, *service = 0;
+
+ if (port > 0) {
+ snprintf(sport, sizeof(sport), "%d", port);
+ service = sport;
+ }
+ if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) {
+ node = hostname;
+ }
+ if ((node) || (service)) {
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_socktype = type;
+ hints.ai_family = family;
+ hints.ai_flags = flags;
+ if ((error = getaddrinfo(node, service, &hints, &res))) {
+ av_log(NULL, AV_LOG_ERROR, "udp_ipv6_resolve_host: %s\n", gai_strerror(error));
+ }
+ }
+ return res;
+}
+
+static int udp_ipv6_set_remote_url(URLContext *h, const char *uri) {
+ UDPContext *s = h->priv_data;
+ char hostname[256];
+ int port;
+ struct addrinfo *res0;
+ url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
+ res0 = udp_ipv6_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
+ if (res0 == 0) return AVERROR_IO;
+ memcpy(&s->dest_addr, res0->ai_addr, res0->ai_addrlen);
+ s->dest_addr_len = res0->ai_addrlen;
+ freeaddrinfo(res0);
+ return 0;
+}
+
+static int udp_ipv6_set_local(URLContext *h) {
+ UDPContext *s = h->priv_data;
+ int udp_fd = -1;
+ struct sockaddr_storage clientaddr;
+ socklen_t addrlen;
+ char sbuf[NI_MAXSERV];
+ char hbuf[NI_MAXHOST];
+ struct addrinfo *res0 = NULL, *res = NULL;
+
+ if (s->local_port != 0) {
+ res0 = udp_ipv6_resolve_host(0, s->local_port, SOCK_DGRAM, AF_UNSPEC, AI_PASSIVE);
+ if (res0 == 0)
+ goto fail;
+ for (res = res0; res; res=res->ai_next) {
+ udp_fd = socket(res->ai_family, SOCK_DGRAM, 0);
+ if (udp_fd > 0) break;
+ perror("socket");
+ }
+ } else {
+ udp_fd = socket(s->dest_addr.ss_family, SOCK_DGRAM, 0);
+ if (udp_fd < 0)
+ perror("socket");
+ }
+
+ if (udp_fd < 0)
+ goto fail;
+
+ if (s->local_port != 0) {
+ if (bind(udp_fd, res0->ai_addr, res0->ai_addrlen) < 0) {
+ perror("bind");
+ goto fail;
+ }
+ freeaddrinfo(res0);
+ res0 = NULL;
+ }
+
+ addrlen = sizeof(clientaddr);
+ if (getsockname(udp_fd, (struct sockaddr *)&clientaddr, &addrlen) < 0) {
+ perror("getsockname");
+ goto fail;
+ }
+
+ if (getnameinfo((struct sockaddr *)&clientaddr, addrlen, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
+ perror("getnameinfo");
+ goto fail;
+ }
+
+ s->local_port = strtol(sbuf, NULL, 10);
+
+ return udp_fd;
+
+ fail:
+ if (udp_fd >= 0)
+ closesocket(udp_fd);
+ if(res0)
+ freeaddrinfo(res0);
+ return -1;
+}
+
+#endif
+
+
+/**
+ * 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: 'multicast=1' : enable multicast
+ * '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 s1 media file context
+ * @param uri of the remote server
+ * @return zero if no error.
+ */
+int udp_set_remote_url(URLContext *h, const char *uri)
+{
+#ifdef CONFIG_IPV6
+ return udp_ipv6_set_remote_url(h, uri);
+#else
+ UDPContext *s = h->priv_data;
+ char hostname[256];
+ int port;
+
+ url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
+
+ /* set the destination address */
+ if (resolve_host(&s->dest_addr.sin_addr, hostname) < 0)
+ return AVERROR_IO;
+ s->dest_addr.sin_family = AF_INET;
+ s->dest_addr.sin_port = htons(port);
+ return 0;
+#endif
+}
+
+/**
+ * Return the local port used by the UDP connexion
+ * @param s1 media file context
+ * @return the local port number
+ */
+int udp_get_local_port(URLContext *h)
+{
+ UDPContext *s = h->priv_data;
+ return s->local_port;
+}
+
+/**
+ * Return the udp file handle for select() usage to wait for several RTP
+ * streams at the same time.
+ * @param h media file context
+ */
+int udp_get_file_handle(URLContext *h)
+{
+ UDPContext *s = h->priv_data;
+ return s->udp_fd;
+}
+
+/* put it in UDP context */
+/* 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 AVERROR(ENOMEM);
+
+ h->priv_data = s;
+ s->ttl = 16;
+ s->is_multicast = 0;
+ s->local_port = 0;
+ s->reuse_socket = 0;
+ p = strchr(uri, '?');
+ if (p) {
+ s->is_multicast = find_info_tag(buf, sizeof(buf), "multicast", 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);
+ }
+ }
+
+ /* 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(AF_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);
+ }
+
+ 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 (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);
+
+#ifdef IP_MULTICAST_TTL
+ 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;
+ 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
+
+ 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)
+ closesocket(udp_fd);
+ av_free(s);
+ return AVERROR_IO;
+}
+
+static int udp_read(URLContext *h, uint8_t *buf, int size)
+{
+ UDPContext *s = h->priv_data;
+#ifndef CONFIG_IPV6
+ struct sockaddr_in from;
+#else
+ struct sockaddr_storage from;
+#endif
+ socklen_t from_len;
+ int len;
+
+ for(;;) {
+ from_len = sizeof(from);
+ len = recvfrom (s->udp_fd, buf, size, 0,
+ (struct sockaddr *)&from, &from_len);
+ if (len < 0) {
+ if (errno != EAGAIN && errno != EINTR)
+ return AVERROR_IO;
+ } else {
+ break;
+ }
+ }
+ return len;
+}
+
+static int udp_write(URLContext *h, uint8_t *buf, int size)
+{
+ UDPContext *s = h->priv_data;
+ int ret;
+
+ for(;;) {
+ ret = sendto (s->udp_fd, buf, size, 0,
+ (struct sockaddr *) &s->dest_addr,
+#ifndef CONFIG_IPV6
+ sizeof (s->dest_addr));
+#else
+ s->dest_addr_len);
+#endif
+ if (ret < 0) {
+ if (errno != EINTR && errno != EAGAIN)
+ return AVERROR_IO;
+ } else {
+ break;
+ }
+ }
+ return size;
+}
+
+static int udp_close(URLContext *h)
+{
+ UDPContext *s = h->priv_data;
+
+#ifndef CONFIG_IPV6
+#ifdef IP_DROP_MEMBERSHIP
+ if (s->is_multicast && !(h->flags & URL_WRONLY)) {
+ if (setsockopt(s->udp_fd, IPPROTO_IP, IP_DROP_MEMBERSHIP,
+ &s->mreq, sizeof(s->mreq)) < 0) {
+ perror("IP_DROP_MEMBERSHIP");
+ }
+ }
+#endif
+#else
+ if (s->is_multicast && !(h->flags & URL_WRONLY))
+ udp_ipv6_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr);
+#endif
+ closesocket(s->udp_fd);
+ av_free(s);
+ return 0;
+}
+
+URLProtocol udp_protocol = {
+ "udp",
+ udp_open,
+ udp_read,
+ udp_write,
+ NULL, /* seek */
+ udp_close,
+};
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-26 18:10:40 +0000