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00021 #include "avformat.h"
00022 #include <unistd.h>
00023 #include "network.h"
00024 #include "os_support.h"
00025
00026 #ifndef IPV6_ADD_MEMBERSHIP
00027 #define IPV6_ADD_MEMBERSHIP IPV6_JOIN_GROUP
00028 #define IPV6_DROP_MEMBERSHIP IPV6_LEAVE_GROUP
00029 #endif
00030
00031 typedef struct {
00032 int udp_fd;
00033 int ttl;
00034 int is_multicast;
00035 int local_port;
00036 int reuse_socket;
00037 #ifndef CONFIG_IPV6
00038 struct sockaddr_in dest_addr;
00039 #else
00040 struct sockaddr_storage dest_addr;
00041 #endif
00042 size_t dest_addr_len;
00043 } UDPContext;
00044
00045 #define UDP_TX_BUF_SIZE 32768
00046 #define UDP_MAX_PKT_SIZE 65536
00047
00048 static int udp_set_multicast_ttl(int sockfd, int mcastTTL, struct sockaddr *addr) {
00049 #ifdef IP_MULTICAST_TTL
00050 if (addr->sa_family == AF_INET) {
00051 if (setsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &mcastTTL, sizeof(mcastTTL)) < 0) {
00052 av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_MULTICAST_TTL): %s\n", strerror(errno));
00053 return -1;
00054 }
00055 }
00056 #endif
00057 #ifdef CONFIG_IPV6
00058 if (addr->sa_family == AF_INET6) {
00059 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &mcastTTL, sizeof(mcastTTL)) < 0) {
00060 av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_MULTICAST_HOPS): %s\n", strerror(errno));
00061 return -1;
00062 }
00063 }
00064 #endif
00065 return 0;
00066 }
00067
00068 static int udp_join_multicast_group(int sockfd, struct sockaddr *addr) {
00069 #ifdef IP_ADD_MEMBERSHIP
00070 if (addr->sa_family == AF_INET) {
00071 struct ip_mreq mreq;
00072
00073 mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
00074 mreq.imr_interface.s_addr= INADDR_ANY;
00075 if (setsockopt(sockfd, IPPROTO_IP, IP_ADD_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
00076 av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_ADD_MEMBERSHIP): %s\n", strerror(errno));
00077 return -1;
00078 }
00079 }
00080 #endif
00081 #ifdef CONFIG_IPV6
00082 if (addr->sa_family == AF_INET6) {
00083 struct ipv6_mreq mreq6;
00084
00085 memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
00086 mreq6.ipv6mr_interface= 0;
00087 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
00088 av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_ADD_MEMBERSHIP): %s\n", strerror(errno));
00089 return -1;
00090 }
00091 }
00092 #endif
00093 return 0;
00094 }
00095
00096 static int udp_leave_multicast_group(int sockfd, struct sockaddr *addr) {
00097 #ifdef IP_DROP_MEMBERSHIP
00098 if (addr->sa_family == AF_INET) {
00099 struct ip_mreq mreq;
00100
00101 mreq.imr_multiaddr.s_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
00102 mreq.imr_interface.s_addr= INADDR_ANY;
00103 if (setsockopt(sockfd, IPPROTO_IP, IP_DROP_MEMBERSHIP, (const void *)&mreq, sizeof(mreq)) < 0) {
00104 av_log(NULL, AV_LOG_ERROR, "setsockopt(IP_DROP_MEMBERSHIP): %s\n", strerror(errno));
00105 return -1;
00106 }
00107 }
00108 #endif
00109 #ifdef CONFIG_IPV6
00110 if (addr->sa_family == AF_INET6) {
00111 struct ipv6_mreq mreq6;
00112
00113 memcpy(&mreq6.ipv6mr_multiaddr, &(((struct sockaddr_in6 *)addr)->sin6_addr), sizeof(struct in6_addr));
00114 mreq6.ipv6mr_interface= 0;
00115 if (setsockopt(sockfd, IPPROTO_IPV6, IPV6_DROP_MEMBERSHIP, &mreq6, sizeof(mreq6)) < 0) {
00116 av_log(NULL, AV_LOG_ERROR, "setsockopt(IPV6_DROP_MEMBERSHIP): %s\n", strerror(errno));
00117 return -1;
00118 }
00119 }
00120 #endif
00121 return 0;
00122 }
00123
00124 #ifdef CONFIG_IPV6
00125 static struct addrinfo* udp_ipv6_resolve_host(const char *hostname, int port, int type, int family, int flags) {
00126 struct addrinfo hints, *res = 0;
00127 int error;
00128 char sport[16];
00129 const char *node = 0, *service = "0";
00130
00131 if (port > 0) {
00132 snprintf(sport, sizeof(sport), "%d", port);
00133 service = sport;
00134 }
00135 if ((hostname) && (hostname[0] != '\0') && (hostname[0] != '?')) {
00136 node = hostname;
00137 }
00138 memset(&hints, 0, sizeof(hints));
00139 hints.ai_socktype = type;
00140 hints.ai_family = family;
00141 hints.ai_flags = flags;
00142 if ((error = getaddrinfo(node, service, &hints, &res))) {
00143 av_log(NULL, AV_LOG_ERROR, "udp_ipv6_resolve_host: %s\n", gai_strerror(error));
00144 }
00145
00146 return res;
00147 }
00148
00149 static int udp_set_url(struct sockaddr_storage *addr, const char *hostname, int port) {
00150 struct addrinfo *res0;
00151 int addr_len;
00152
00153 res0 = udp_ipv6_resolve_host(hostname, port, SOCK_DGRAM, AF_UNSPEC, 0);
00154 if (res0 == 0) return AVERROR(EIO);
00155 memcpy(addr, res0->ai_addr, res0->ai_addrlen);
00156 addr_len = res0->ai_addrlen;
00157 freeaddrinfo(res0);
00158
00159 return addr_len;
00160 }
00161
00162 static int udp_socket_create(UDPContext *s, struct sockaddr_storage *addr, int *addr_len)
00163 {
00164 int udp_fd = -1;
00165 struct addrinfo *res0 = NULL, *res = NULL;
00166 int family = AF_UNSPEC;
00167
00168 if (((struct sockaddr *) &s->dest_addr)->sa_family)
00169 family = ((struct sockaddr *) &s->dest_addr)->sa_family;
00170 res0 = udp_ipv6_resolve_host(0, s->local_port, SOCK_DGRAM, family, AI_PASSIVE);
00171 if (res0 == 0)
00172 goto fail;
00173 for (res = res0; res; res=res->ai_next) {
00174 udp_fd = socket(res->ai_family, SOCK_DGRAM, 0);
00175 if (udp_fd > 0) break;
00176 av_log(NULL, AV_LOG_ERROR, "socket: %s\n", strerror(errno));
00177 }
00178
00179 if (udp_fd < 0)
00180 goto fail;
00181
00182 memcpy(addr, res->ai_addr, res->ai_addrlen);
00183 *addr_len = res->ai_addrlen;
00184
00185 freeaddrinfo(res0);
00186
00187 return udp_fd;
00188
00189 fail:
00190 if (udp_fd >= 0)
00191 closesocket(udp_fd);
00192 if(res0)
00193 freeaddrinfo(res0);
00194 return -1;
00195 }
00196
00197 static int udp_port(struct sockaddr_storage *addr, int addr_len)
00198 {
00199 char sbuf[NI_MAXSERV];
00200 char hbuf[NI_MAXHOST];
00201
00202 if (getnameinfo((struct sockaddr *)addr, addr_len, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf), NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
00203 av_log(NULL, AV_LOG_ERROR, "getnameinfo: %s\n", strerror(errno));
00204 return -1;
00205 }
00206
00207 return strtol(sbuf, NULL, 10);
00208 }
00209
00210 #else
00211
00212 static int udp_set_url(struct sockaddr_in *addr, const char *hostname, int port)
00213 {
00214
00215 if (resolve_host(&addr->sin_addr, hostname) < 0)
00216 return AVERROR(EIO);
00217 addr->sin_family = AF_INET;
00218 addr->sin_port = htons(port);
00219
00220 return sizeof(struct sockaddr_in);
00221 }
00222
00223 static int udp_socket_create(UDPContext *s, struct sockaddr_in *addr, int *addr_len)
00224 {
00225 int fd;
00226
00227 fd = socket(AF_INET, SOCK_DGRAM, 0);
00228 if (fd < 0)
00229 return -1;
00230
00231 addr->sin_family = AF_INET;
00232 addr->sin_addr.s_addr = htonl (INADDR_ANY);
00233 addr->sin_port = htons(s->local_port);
00234 *addr_len = sizeof(struct sockaddr_in);
00235
00236 return fd;
00237 }
00238
00239 static int udp_port(struct sockaddr_in *addr, int len)
00240 {
00241 return ntohs(addr->sin_port);
00242 }
00243 #endif
00244
00245
00262 int udp_set_remote_url(URLContext *h, const char *uri)
00263 {
00264 UDPContext *s = h->priv_data;
00265 char hostname[256];
00266 int port;
00267
00268 url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
00269
00270
00271 s->dest_addr_len = udp_set_url(&s->dest_addr, hostname, port);
00272 if (s->dest_addr_len < 0) {
00273 return AVERROR(EIO);
00274 }
00275
00276 return 0;
00277 }
00278
00284 int udp_get_local_port(URLContext *h)
00285 {
00286 UDPContext *s = h->priv_data;
00287 return s->local_port;
00288 }
00289
00295 int udp_get_file_handle(URLContext *h)
00296 {
00297 UDPContext *s = h->priv_data;
00298 return s->udp_fd;
00299 }
00300
00301
00302
00303 static int udp_open(URLContext *h, const char *uri, int flags)
00304 {
00305 char hostname[1024];
00306 int port, udp_fd = -1, tmp;
00307 UDPContext *s = NULL;
00308 int is_output;
00309 const char *p;
00310 char buf[256];
00311 #ifndef CONFIG_IPV6
00312 struct sockaddr_in my_addr;
00313 #else
00314 struct sockaddr_storage my_addr;
00315 #endif
00316 int len;
00317
00318 h->is_streamed = 1;
00319 h->max_packet_size = 1472;
00320
00321 is_output = (flags & URL_WRONLY);
00322
00323 s = av_mallocz(sizeof(UDPContext));
00324 if (!s)
00325 return AVERROR(ENOMEM);
00326
00327 h->priv_data = s;
00328 s->ttl = 16;
00329 p = strchr(uri, '?');
00330 if (p) {
00331 s->is_multicast = find_info_tag(buf, sizeof(buf), "multicast", p);
00332 s->reuse_socket = find_info_tag(buf, sizeof(buf), "reuse", p);
00333 if (find_info_tag(buf, sizeof(buf), "ttl", p)) {
00334 s->ttl = strtol(buf, NULL, 10);
00335 }
00336 if (find_info_tag(buf, sizeof(buf), "localport", p)) {
00337 s->local_port = strtol(buf, NULL, 10);
00338 }
00339 if (find_info_tag(buf, sizeof(buf), "pkt_size", p)) {
00340 h->max_packet_size = strtol(buf, NULL, 10);
00341 }
00342 }
00343
00344
00345 url_split(NULL, 0, NULL, 0, hostname, sizeof(hostname), &port, NULL, 0, uri);
00346
00347
00348 if (hostname[0] == '\0' || hostname[0] == '?') {
00349
00350 if (s->is_multicast || (flags & URL_WRONLY))
00351 goto fail;
00352 } else {
00353 udp_set_remote_url(h, uri);
00354 }
00355
00356 if(!ff_network_init())
00357 return AVERROR(EIO);
00358
00359 if (s->is_multicast && !(h->flags & URL_WRONLY))
00360 s->local_port = port;
00361 udp_fd = udp_socket_create(s, &my_addr, &len);
00362 if (udp_fd < 0)
00363 goto fail;
00364
00365 if (s->reuse_socket)
00366 if (setsockopt (udp_fd, SOL_SOCKET, SO_REUSEADDR, &(s->reuse_socket), sizeof(s->reuse_socket)) != 0)
00367 goto fail;
00368
00369
00370 if (bind(udp_fd,(struct sockaddr *)&my_addr, len) < 0)
00371 goto fail;
00372
00373 len = sizeof(my_addr);
00374 getsockname(udp_fd, (struct sockaddr *)&my_addr, &len);
00375 s->local_port = udp_port(&my_addr, len);
00376
00377 if (s->is_multicast) {
00378 if (h->flags & URL_WRONLY) {
00379
00380 if (udp_set_multicast_ttl(udp_fd, s->ttl, (struct sockaddr *)&s->dest_addr) < 0)
00381 goto fail;
00382 } else {
00383
00384 if (udp_join_multicast_group(udp_fd, (struct sockaddr *)&s->dest_addr) < 0)
00385 goto fail;
00386 }
00387 }
00388
00389 if (is_output) {
00390
00391 tmp = UDP_TX_BUF_SIZE;
00392 if (setsockopt(udp_fd, SOL_SOCKET, SO_SNDBUF, &tmp, sizeof(tmp)) < 0) {
00393 av_log(NULL, AV_LOG_ERROR, "setsockopt(SO_SNDBUF): %s\n", strerror(errno));
00394 goto fail;
00395 }
00396 } else {
00397
00398
00399 tmp = UDP_MAX_PKT_SIZE;
00400 setsockopt(udp_fd, SOL_SOCKET, SO_RCVBUF, &tmp, sizeof(tmp));
00401 }
00402
00403 s->udp_fd = udp_fd;
00404 return 0;
00405 fail:
00406 if (udp_fd >= 0)
00407 closesocket(udp_fd);
00408 av_free(s);
00409 return AVERROR(EIO);
00410 }
00411
00412 static int udp_read(URLContext *h, uint8_t *buf, int size)
00413 {
00414 UDPContext *s = h->priv_data;
00415 int len;
00416
00417 for(;;) {
00418 len = recv(s->udp_fd, buf, size, 0);
00419 if (len < 0) {
00420 if (ff_neterrno() != FF_NETERROR(EAGAIN) &&
00421 ff_neterrno() != FF_NETERROR(EINTR))
00422 return AVERROR(EIO);
00423 } else {
00424 break;
00425 }
00426 }
00427 return len;
00428 }
00429
00430 static int udp_write(URLContext *h, uint8_t *buf, int size)
00431 {
00432 UDPContext *s = h->priv_data;
00433 int ret;
00434
00435 for(;;) {
00436 ret = sendto (s->udp_fd, buf, size, 0,
00437 (struct sockaddr *) &s->dest_addr,
00438 s->dest_addr_len);
00439 if (ret < 0) {
00440 if (ff_neterrno() != FF_NETERROR(EINTR) &&
00441 ff_neterrno() != FF_NETERROR(EAGAIN))
00442 return AVERROR(EIO);
00443 } else {
00444 break;
00445 }
00446 }
00447 return size;
00448 }
00449
00450 static int udp_close(URLContext *h)
00451 {
00452 UDPContext *s = h->priv_data;
00453
00454 if (s->is_multicast && !(h->flags & URL_WRONLY))
00455 udp_leave_multicast_group(s->udp_fd, (struct sockaddr *)&s->dest_addr);
00456 closesocket(s->udp_fd);
00457 ff_network_close();
00458 av_free(s);
00459 return 0;
00460 }
00461
00462 URLProtocol udp_protocol = {
00463 "udp",
00464 udp_open,
00465 udp_read,
00466 udp_write,
00467 NULL,
00468 udp_close,
00469 };