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-rw-r--r--src/rtsp_client.c731
1 files changed, 731 insertions, 0 deletions
diff --git a/src/rtsp_client.c b/src/rtsp_client.c
new file mode 100644
index 000000000..a808ef207
--- /dev/null
+++ b/src/rtsp_client.c
@@ -0,0 +1,731 @@
+/*
+ * Copyright (C) 2003-2011 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/*
+ * Based on the RTSP client by Shiro Ninomiya <shiron@snino.com>
+ */
+
+#include "rtsp_client.h"
+#include "tcp_socket.h"
+#include "glib_compat.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <sys/time.h>
+
+#ifdef WIN32
+#define WINVER 0x0501
+#include <ws2tcpip.h>
+#include <winsock.h>
+#else
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#endif
+
+/*
+ * Free all memory associated with key_data
+ */
+void
+free_kd(struct key_data *kd)
+{
+ struct key_data *iter = kd;
+ while (iter) {
+ g_free(iter->key);
+ g_free(iter->data);
+ iter = iter->next;
+ g_free(kd);
+ kd = iter;
+ }
+}
+
+/*
+ * key_data type data look up
+ */
+char *
+kd_lookup(struct key_data *kd, const char *key)
+{
+ while (kd) {
+ if (!strcmp(kd->key, key)) {
+ return kd->data;
+ }
+ kd = kd->next;
+ }
+ return NULL;
+}
+
+struct rtspcl_data *
+rtspcl_open(void)
+{
+ struct rtspcl_data *rtspcld;
+ rtspcld = g_new0(struct rtspcl_data, 1);
+ rtspcld->mutex = g_mutex_new();
+ rtspcld->cond = g_cond_new();
+ rtspcld->received_lines = g_queue_new();
+ rtspcld->useragent = "RTSPClient";
+ return rtspcld;
+}
+
+/* bind an opened socket to specified hostname and port.
+ * if hostname=NULL, use INADDR_ANY.
+ * if *port=0, use dynamically assigned port
+ */
+static int bind_host(int sd, char *hostname, unsigned long ulAddr,
+ unsigned short *port, GError **error_r)
+{
+ struct sockaddr_in my_addr;
+ socklen_t nlen = sizeof(struct sockaddr);
+ struct hostent *h;
+
+ memset(&my_addr, 0, sizeof(my_addr));
+ /* use specified hostname */
+ if (hostname) {
+ /* get server IP address (no check if input is IP address or DNS name) */
+ h = gethostbyname(hostname);
+ if (h == NULL) {
+ if (strstr(hostname, "255.255.255.255") == hostname) {
+ my_addr.sin_addr.s_addr=-1;
+ } else {
+ if ((my_addr.sin_addr.s_addr = inet_addr(hostname)) == 0xFFFFFFFF) {
+ g_set_error(error_r, rtsp_client_quark(), 0,
+ "failed to resolve host '%s'",
+ hostname);
+ return -1;
+ }
+ }
+ my_addr.sin_family = AF_INET;
+ } else {
+ my_addr.sin_family = h->h_addrtype;
+ memcpy((char *) &my_addr.sin_addr.s_addr,
+ h->h_addr_list[0], h->h_length);
+ }
+ } else {
+ // if hostname=NULL, use INADDR_ANY
+ if (ulAddr)
+ my_addr.sin_addr.s_addr = ulAddr;
+ else
+ my_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+ my_addr.sin_family = AF_INET;
+ }
+
+ /* bind a specified port */
+ my_addr.sin_port = htons(*port);
+
+ if (bind(sd, (struct sockaddr *) &my_addr, sizeof(my_addr)) < 0) {
+ g_set_error(error_r, rtsp_client_quark(), errno,
+ "failed to bind socket: %s",
+ g_strerror(errno));
+ return -1;
+ }
+
+ if (*port == 0) {
+ getsockname(sd, (struct sockaddr *) &my_addr, &nlen);
+ *port = ntohs(my_addr.sin_port);
+ }
+
+ return 0;
+}
+
+/*
+ * open tcp port
+ */
+static int
+open_tcp_socket(char *hostname, unsigned short *port,
+ GError **error_r)
+{
+ int sd;
+
+ /* socket creation */
+ sd = socket(AF_INET, SOCK_STREAM, 0);
+ if (sd < 0) {
+ g_set_error(error_r, rtsp_client_quark(), errno,
+ "failed to create TCP socket: %s",
+ g_strerror(errno));
+ return -1;
+ }
+ if (bind_host(sd, hostname, 0, port, error_r)) {
+ close(sd);
+ return -1;
+ }
+
+ return sd;
+}
+
+static bool
+get_sockaddr_by_host(const char *host, short destport,
+ struct sockaddr_in *addr,
+ GError **error_r)
+{
+ struct hostent *h;
+
+ h = gethostbyname(host);
+ if (h) {
+ addr->sin_family = h->h_addrtype;
+ memcpy((char *) &addr->sin_addr.s_addr, h->h_addr_list[0], h->h_length);
+ } else {
+ addr->sin_family = AF_INET;
+ if ((addr->sin_addr.s_addr=inet_addr(host))==0xFFFFFFFF) {
+ g_set_error(error_r, rtsp_client_quark(), 0,
+ "failed to resolve host '%s'", host);
+ return false;
+ }
+ }
+ addr->sin_port = htons(destport);
+ return true;
+}
+
+/*
+ * create tcp connection
+ * as long as the socket is not non-blocking, this can block the process
+ * nsport is network byte order
+ */
+static bool
+get_tcp_connect(int sd, struct sockaddr_in dest_addr, GError **error_r)
+{
+ if (connect(sd, (struct sockaddr *)&dest_addr, sizeof(struct sockaddr))){
+ g_usleep(100000);
+ // try one more time
+ if (connect(sd, (struct sockaddr *)&dest_addr, sizeof(struct sockaddr))) {
+ g_set_error(error_r, rtsp_client_quark(), errno,
+ "failed to connect to %s:%d: %s",
+ inet_ntoa(dest_addr.sin_addr),
+ ntohs(dest_addr.sin_port),
+ g_strerror(errno));
+ return false;
+ }
+ }
+ return true;
+}
+
+static bool
+get_tcp_connect_by_host(int sd, const char *host, short destport,
+ GError **error_r)
+{
+ struct sockaddr_in addr;
+
+ return get_sockaddr_by_host(host, destport, &addr, error_r) &&
+ get_tcp_connect(sd, addr, error_r);
+}
+
+static void
+rtsp_client_flush_received(struct rtspcl_data *rtspcld)
+{
+ char *line;
+ while ((line = g_queue_pop_head(rtspcld->received_lines)) != NULL)
+ g_free(line);
+}
+
+static size_t
+rtsp_client_socket_data(const void *_data, size_t length, void *ctx)
+{
+ struct rtspcl_data *rtspcld = ctx;
+
+ g_mutex_lock(rtspcld->mutex);
+
+ if (rtspcld->tcp_socket == NULL) {
+ g_mutex_unlock(rtspcld->mutex);
+ return 0;
+ }
+
+ const bool was_empty = g_queue_is_empty(rtspcld->received_lines);
+ bool added = false;
+ const char *data = _data, *end = data + length, *p = data, *eol;
+ while ((eol = memchr(p, '\n', end - p)) != NULL) {
+ const char *next = eol + 1;
+
+ if (rtspcld->received_lines->length < 64) {
+ if (eol > p && eol[-1] == '\r')
+ --eol;
+
+ g_queue_push_tail(rtspcld->received_lines,
+ g_strndup(p, eol - p));
+ added = true;
+ }
+
+ p = next;
+ }
+
+ if (was_empty && added)
+ g_cond_broadcast(rtspcld->cond);
+
+ g_mutex_unlock(rtspcld->mutex);
+
+ return p - data;
+}
+
+static void
+rtsp_client_socket_error(GError *error, void *ctx)
+{
+ struct rtspcl_data *rtspcld = ctx;
+
+ g_warning("%s", error->message);
+ g_error_free(error);
+
+ g_mutex_lock(rtspcld->mutex);
+
+ rtsp_client_flush_received(rtspcld);
+
+ struct tcp_socket *s = rtspcld->tcp_socket;
+ rtspcld->tcp_socket = NULL;
+
+ g_cond_broadcast(rtspcld->cond);
+
+ g_mutex_unlock(rtspcld->mutex);
+
+ if (s != NULL)
+ tcp_socket_free(s);
+}
+
+static void
+rtsp_client_socket_disconnected(void *ctx)
+{
+ struct rtspcl_data *rtspcld = ctx;
+
+ g_mutex_lock(rtspcld->mutex);
+
+ rtsp_client_flush_received(rtspcld);
+
+ struct tcp_socket *s = rtspcld->tcp_socket;
+ rtspcld->tcp_socket = NULL;
+
+ g_cond_broadcast(rtspcld->cond);
+
+ g_mutex_unlock(rtspcld->mutex);
+
+ if (s != NULL)
+ tcp_socket_free(s);
+}
+
+static const struct tcp_socket_handler rtsp_client_socket_handler = {
+ .data = rtsp_client_socket_data,
+ .error = rtsp_client_socket_error,
+ .disconnected = rtsp_client_socket_disconnected,
+};
+
+bool
+rtspcl_connect(struct rtspcl_data *rtspcld, const char *host, short destport,
+ const char *sid, GError **error_r)
+{
+ assert(rtspcld->tcp_socket == NULL);
+
+ unsigned short myport = 0;
+ struct sockaddr_in name;
+ socklen_t namelen = sizeof(name);
+
+ int fd = open_tcp_socket(NULL, &myport, error_r);
+ if (fd < 0)
+ return false;
+
+ if (!get_tcp_connect_by_host(fd, host, destport, error_r))
+ return false;
+
+ getsockname(fd, (struct sockaddr*)&name, &namelen);
+ memcpy(&rtspcld->local_addr, &name.sin_addr,sizeof(struct in_addr));
+ sprintf(rtspcld->url, "rtsp://%s/%s", inet_ntoa(name.sin_addr), sid);
+ getpeername(fd, (struct sockaddr*)&name, &namelen);
+ memcpy(&rtspcld->host_addr, &name.sin_addr, sizeof(struct in_addr));
+
+ rtspcld->tcp_socket = tcp_socket_new(fd, &rtsp_client_socket_handler,
+ rtspcld);
+
+ return true;
+}
+
+static void
+rtspcl_disconnect(struct rtspcl_data *rtspcld)
+{
+ g_mutex_lock(rtspcld->mutex);
+ rtsp_client_flush_received(rtspcld);
+ g_mutex_unlock(rtspcld->mutex);
+
+ if (rtspcld->tcp_socket != NULL) {
+ tcp_socket_free(rtspcld->tcp_socket);
+ rtspcld->tcp_socket = NULL;
+ }
+}
+
+static void
+rtspcl_remove_all_exthds(struct rtspcl_data *rtspcld)
+{
+ free_kd(rtspcld->exthds);
+ rtspcld->exthds = NULL;
+}
+
+void
+rtspcl_close(struct rtspcl_data *rtspcld)
+{
+ rtspcl_disconnect(rtspcld);
+ g_queue_free(rtspcld->received_lines);
+ rtspcl_remove_all_exthds(rtspcld);
+ g_free(rtspcld->session);
+ g_cond_free(rtspcld->cond);
+ g_mutex_free(rtspcld->mutex);
+ g_free(rtspcld);
+}
+
+void
+rtspcl_add_exthds(struct rtspcl_data *rtspcld, const char *key, char *data)
+{
+ struct key_data *new_kd;
+ new_kd = g_new(struct key_data, 1);
+ new_kd->key = g_strdup(key);
+ new_kd->data = g_strdup(data);
+ new_kd->next = NULL;
+ if (!rtspcld->exthds) {
+ rtspcld->exthds = new_kd;
+ } else {
+ struct key_data *iter = rtspcld->exthds;
+ while (iter->next) {
+ iter = iter->next;
+ }
+ iter->next = new_kd;
+ }
+}
+
+/*
+ * read one line from the file descriptor
+ * timeout: msec unit, -1 for infinite
+ * if CR comes then following LF is expected
+ * returned string in line is always null terminated, maxlen-1 is maximum string length
+ */
+static int
+read_line(struct rtspcl_data *rtspcld, char *line, int maxlen,
+ int timeout)
+{
+ g_mutex_lock(rtspcld->mutex);
+
+ GTimeVal end_time;
+ if (timeout >= 0) {
+ g_get_current_time(&end_time);
+
+ end_time.tv_sec += timeout / 1000;
+ timeout %= 1000;
+ end_time.tv_usec = timeout * 1000;
+ if (end_time.tv_usec > 1000000) {
+ end_time.tv_usec -= 1000000;
+ ++end_time.tv_sec;
+ }
+ }
+
+ while (true) {
+ if (!g_queue_is_empty(rtspcld->received_lines)) {
+ /* success, copy to buffer */
+
+ char *p = g_queue_pop_head(rtspcld->received_lines);
+ g_mutex_unlock(rtspcld->mutex);
+
+ g_strlcpy(line, p, maxlen);
+ g_free(p);
+
+ return strlen(line);
+ }
+
+ if (rtspcld->tcp_socket == NULL) {
+ /* error */
+ g_mutex_unlock(rtspcld->mutex);
+ return -1;
+ }
+
+ if (timeout < 0) {
+ g_cond_wait(rtspcld->cond, rtspcld->mutex);
+ } else if (!g_cond_timed_wait(rtspcld->cond, rtspcld->mutex,
+ &end_time)) {
+ g_mutex_unlock(rtspcld->mutex);
+ return 0;
+ }
+ }
+}
+
+/*
+ * send RTSP request, and get response if it's needed
+ * if this gets a success, *kd is allocated or reallocated (if *kd is not NULL)
+ */
+bool
+exec_request(struct rtspcl_data *rtspcld, const char *cmd,
+ const char *content_type, const char *content,
+ int get_response,
+ const struct key_data *hds, struct key_data **kd,
+ GError **error_r)
+{
+ char line[1024];
+ char req[1024];
+ char reql[128];
+ const char delimiters[] = " ";
+ char *token, *dp;
+ int dsize = 0;
+ int timeout = 5000; // msec unit
+
+ if (!rtspcld) {
+ g_set_error_literal(error_r, rtsp_client_quark(), 0,
+ "not connected");
+ return false;
+ }
+
+ sprintf(req, "%s %s RTSP/1.0\r\nCSeq: %d\r\n", cmd, rtspcld->url, ++rtspcld->cseq );
+
+ if ( rtspcld->session != NULL ) {
+ sprintf(reql,"Session: %s\r\n", rtspcld->session );
+ strncat(req,reql,sizeof(req));
+ }
+
+ const struct key_data *hd_iter = hds;
+ while (hd_iter) {
+ sprintf(reql, "%s: %s\r\n", hd_iter->key, hd_iter->data);
+ strncat(req, reql, sizeof(req));
+ hd_iter = hd_iter->next;
+ }
+
+ if (content_type && content) {
+ sprintf(reql, "Content-Type: %s\r\nContent-Length: %d\r\n",
+ content_type, (int) strlen(content));
+ strncat(req,reql,sizeof(req));
+ }
+
+ sprintf(reql, "User-Agent: %s\r\n", rtspcld->useragent);
+ strncat(req, reql, sizeof(req));
+
+ hd_iter = rtspcld->exthds;
+ while (hd_iter) {
+ sprintf(reql, "%s: %s\r\n", hd_iter->key, hd_iter->data);
+ strncat(req, reql, sizeof(req));
+ hd_iter = hd_iter->next;
+ }
+ strncat(req, "\r\n", sizeof(req));
+
+ if (content_type && content)
+ strncat(req, content, sizeof(req));
+
+ if (!tcp_socket_send(rtspcld->tcp_socket, req, strlen(req))) {
+ g_set_error(error_r, rtsp_client_quark(), errno,
+ "write error: %s",
+ g_strerror(errno));
+ return false;
+ }
+
+ if (!get_response) return true;
+
+ if (read_line(rtspcld, line, sizeof(line), timeout) <= 0) {
+ g_set_error_literal(error_r, rtsp_client_quark(), 0,
+ "request failed");
+ return false;
+ }
+
+ token = strtok(line, delimiters);
+ token = strtok(NULL, delimiters);
+ if (token == NULL) {
+ g_set_error_literal(error_r, rtsp_client_quark(), 0,
+ "request failed");
+ return false;
+ }
+
+ if (strcmp(token, "200") != 0) {
+ g_set_error(error_r, rtsp_client_quark(), 0,
+ "request failed: %s", token);
+ return false;
+ }
+
+ /* if the caller isn't interested in response headers, put
+ them on the trash, which is freed before returning from
+ this function */
+ struct key_data *trash = NULL;
+ if (kd == NULL)
+ kd = &trash;
+
+ struct key_data *cur_kd = *kd;
+
+ struct key_data *new_kd = NULL;
+ while (read_line(rtspcld, line, sizeof(line), timeout) > 0) {
+ timeout = 1000; // once it started, it shouldn't take a long time
+ if (new_kd != NULL && line[0] == ' ') {
+ const char *j = line;
+ while (*j == ' ')
+ ++j;
+
+ dsize += strlen(j);
+ new_kd->data = g_realloc(new_kd->data, dsize);
+ strcat(new_kd->data, j);
+ continue;
+ }
+ dp = strstr(line, ":");
+ if (!dp) {
+ free_kd(*kd);
+ *kd = NULL;
+
+ g_set_error_literal(error_r, rtsp_client_quark(), 0,
+ "request failed, bad header");
+ return false;
+ }
+
+ *dp++ = 0;
+ new_kd = g_new(struct key_data, 1);
+ new_kd->key = g_strdup(line);
+ dsize = strlen(dp) + 1;
+ new_kd->data = g_strdup(dp);
+ new_kd->next = NULL;
+ if (cur_kd == NULL) {
+ cur_kd = *kd = new_kd;
+ } else {
+ cur_kd->next = new_kd;
+ cur_kd = new_kd;
+ }
+ }
+
+ free_kd(trash);
+
+ return true;
+}
+
+bool
+rtspcl_set_parameter(struct rtspcl_data *rtspcld, const char *parameter,
+ GError **error_r)
+{
+ return exec_request(rtspcld, "SET_PARAMETER", "text/parameters",
+ parameter, 1, NULL, NULL, error_r);
+}
+
+void
+rtspcl_set_useragent(struct rtspcl_data *rtspcld, const char *name)
+{
+ rtspcld->useragent = name;
+}
+
+bool
+rtspcl_announce_sdp(struct rtspcl_data *rtspcld, const char *sdp,
+ GError **error_r)
+{
+ return exec_request(rtspcld, "ANNOUNCE", "application/sdp", sdp, 1,
+ NULL, NULL, error_r);
+}
+
+bool
+rtspcl_setup(struct rtspcl_data *rtspcld, struct key_data **kd,
+ int control_port, int ntp_port,
+ GError **error_r)
+{
+ struct key_data *rkd = NULL, hds;
+ const char delimiters[] = ";";
+ char *buf = NULL;
+ char *token, *pc;
+ int rval = false;
+
+ static char transport_key[] = "Transport";
+
+ char transport_value[256];
+ snprintf(transport_value, sizeof(transport_value),
+ "RTP/AVP/UDP;unicast;interleaved=0-1;mode=record;control_port=%d;timing_port=%d",
+ control_port, ntp_port);
+
+ hds.key = transport_key;
+ hds.data = transport_value;
+ hds.next = NULL;
+ if (!exec_request(rtspcld, "SETUP", NULL, NULL, 1,
+ &hds, &rkd, error_r))
+ return false;
+
+ if (!(rtspcld->session = g_strdup(kd_lookup(rkd, "Session")))) {
+ g_set_error_literal(error_r, rtsp_client_quark(), 0,
+ "no session in response");
+ goto erexit;
+ }
+ if (!(rtspcld->transport = kd_lookup(rkd, "Transport"))) {
+ g_set_error_literal(error_r, rtsp_client_quark(), 0,
+ "no transport in response");
+ goto erexit;
+ }
+ buf = g_strdup(rtspcld->transport);
+ token = strtok(buf, delimiters);
+ rtspcld->server_port = 0;
+ rtspcld->control_port = 0;
+ while (token) {
+ if ((pc = strstr(token, "="))) {
+ *pc = 0;
+ if (!strcmp(token,"server_port")) {
+ rtspcld->server_port=atoi(pc + 1);
+ }
+ if (!strcmp(token,"control_port")) {
+ rtspcld->control_port=atoi(pc + 1);
+ }
+ }
+ token = strtok(NULL, delimiters);
+ }
+ if (rtspcld->server_port == 0) {
+ g_set_error_literal(error_r, rtsp_client_quark(), 0,
+ "no server_port in response");
+ goto erexit;
+ }
+ if (rtspcld->control_port == 0) {
+ g_set_error_literal(error_r, rtsp_client_quark(), 0,
+ "no control_port in response");
+ goto erexit;
+ }
+ rval = true;
+ erexit:
+ g_free(buf);
+
+ if (!rval || kd == NULL) {
+ free_kd(rkd);
+ rkd = NULL;
+ }
+
+ if (kd != NULL)
+ *kd = rkd;
+
+ return rval;
+}
+
+bool
+rtspcl_record(struct rtspcl_data *rtspcld,
+ int seq_num, int rtptime,
+ GError **error_r)
+{
+ if (!rtspcld->session) {
+ g_set_error_literal(error_r, rtsp_client_quark(), 0,
+ "no session in progress");
+ return false;
+ }
+
+ char buf[128];
+ sprintf(buf, "seq=%d,rtptime=%u", seq_num, rtptime);
+
+ struct key_data rtp;
+ static char rtp_key[] = "RTP-Info";
+ rtp.key = rtp_key;
+ rtp.data = buf;
+ rtp.next = NULL;
+
+ struct key_data range;
+ static char range_key[] = "Range";
+ range.key = range_key;
+ static char range_value[] = "npt=0-";
+ range.data = range_value;
+ range.next = &rtp;
+
+ return exec_request(rtspcld, "RECORD", NULL, NULL, 1, &range,
+ NULL, error_r);
+}
+
+char *
+rtspcl_local_ip(struct rtspcl_data *rtspcld)
+{
+ return inet_ntoa(rtspcld->local_addr);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-18 14:24:10 +0000