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ffserver.c
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ffserver.c
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/*
* 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
*/
/**
* @file
* multiple format streaming server based on the FFmpeg libraries
*/
#include "config.h"
#if !HAVE_CLOSESOCKET
#define closesocket close
#endif
#include <string.h>
#include <stdlib.h>
#include "libavformat/avformat.h"
// FIXME those are internal headers, ffserver _really_ shouldn't use them
#include "libavformat/ffm.h"
#include "libavformat/network.h"
#include "libavformat/os_support.h"
#include "libavformat/rtpdec.h"
#include "libavformat/rtsp.h"
#include "libavformat/avio_internal.h"
#include "libavformat/internal.h"
#include "libavformat/url.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/lfg.h"
#include "libavutil/dict.h"
#include "libavutil/mathematics.h"
#include "libavutil/random_seed.h"
#include "libavutil/parseutils.h"
#include "libavutil/opt.h"
#include <stdarg.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#if HAVE_POLL_H
#include <poll.h>
#endif
#include <errno.h>
#include <time.h>
#include <sys/wait.h>
#include <signal.h>
#if HAVE_DLFCN_H
#include <dlfcn.h>
#endif
#include "cmdutils.h"
const char program_name[] = "ffserver";
const int program_birth_year = 2000;
static const OptionDef options[];
enum HTTPState {
HTTPSTATE_WAIT_REQUEST,
HTTPSTATE_SEND_HEADER,
HTTPSTATE_SEND_DATA_HEADER,
HTTPSTATE_SEND_DATA, /* sending TCP or UDP data */
HTTPSTATE_SEND_DATA_TRAILER,
HTTPSTATE_RECEIVE_DATA,
HTTPSTATE_WAIT_FEED, /* wait for data from the feed */
HTTPSTATE_READY,
RTSPSTATE_WAIT_REQUEST,
RTSPSTATE_SEND_REPLY,
RTSPSTATE_SEND_PACKET,
};
static const char *http_state[] = {
"HTTP_WAIT_REQUEST",
"HTTP_SEND_HEADER",
"SEND_DATA_HEADER",
"SEND_DATA",
"SEND_DATA_TRAILER",
"RECEIVE_DATA",
"WAIT_FEED",
"READY",
"RTSP_WAIT_REQUEST",
"RTSP_SEND_REPLY",
"RTSP_SEND_PACKET",
};
#define MAX_STREAMS 20
#define IOBUFFER_INIT_SIZE 8192
/* timeouts are in ms */
#define HTTP_REQUEST_TIMEOUT (15 * 1000)
#define RTSP_REQUEST_TIMEOUT (3600 * 24 * 1000)
#define SYNC_TIMEOUT (10 * 1000)
typedef struct RTSPActionServerSetup {
uint32_t ipaddr;
char transport_option[512];
} RTSPActionServerSetup;
typedef struct {
int64_t count1, count2;
int64_t time1, time2;
} DataRateData;
/* context associated with one connection */
typedef struct HTTPContext {
enum HTTPState state;
int fd; /* socket file descriptor */
struct sockaddr_in from_addr; /* origin */
struct pollfd *poll_entry; /* used when polling */
int64_t timeout;
uint8_t *buffer_ptr, *buffer_end;
int http_error;
int post;
int chunked_encoding;
int chunk_size; /* 0 if it needs to be read */
struct HTTPContext *next;
int got_key_frame; /* stream 0 => 1, stream 1 => 2, stream 2=> 4 */
int64_t data_count;
/* feed input */
int feed_fd;
/* input format handling */
AVFormatContext *fmt_in;
int64_t start_time; /* In milliseconds - this wraps fairly often */
int64_t first_pts; /* initial pts value */
int64_t cur_pts; /* current pts value from the stream in us */
int64_t cur_frame_duration; /* duration of the current frame in us */
int cur_frame_bytes; /* output frame size, needed to compute
the time at which we send each
packet */
int pts_stream_index; /* stream we choose as clock reference */
int64_t cur_clock; /* current clock reference value in us */
/* output format handling */
struct FFStream *stream;
/* -1 is invalid stream */
int feed_streams[MAX_STREAMS]; /* index of streams in the feed */
int switch_feed_streams[MAX_STREAMS]; /* index of streams in the feed */
int switch_pending;
AVFormatContext fmt_ctx; /* instance of FFStream for one user */
int last_packet_sent; /* true if last data packet was sent */
int suppress_log;
DataRateData datarate;
int wmp_client_id;
char protocol[16];
char method[16];
char url[128];
int buffer_size;
uint8_t *buffer;
int is_packetized; /* if true, the stream is packetized */
int packet_stream_index; /* current stream for output in state machine */
/* RTSP state specific */
uint8_t *pb_buffer; /* XXX: use that in all the code */
AVIOContext *pb;
int seq; /* RTSP sequence number */
/* RTP state specific */
enum RTSPLowerTransport rtp_protocol;
char session_id[32]; /* session id */
AVFormatContext *rtp_ctx[MAX_STREAMS];
/* RTP/UDP specific */
URLContext *rtp_handles[MAX_STREAMS];
/* RTP/TCP specific */
struct HTTPContext *rtsp_c;
uint8_t *packet_buffer, *packet_buffer_ptr, *packet_buffer_end;
} HTTPContext;
/* each generated stream is described here */
enum StreamType {
STREAM_TYPE_LIVE,
STREAM_TYPE_STATUS,
STREAM_TYPE_REDIRECT,
};
enum IPAddressAction {
IP_ALLOW = 1,
IP_DENY,
};
typedef struct IPAddressACL {
struct IPAddressACL *next;
enum IPAddressAction action;
/* These are in host order */
struct in_addr first;
struct in_addr last;
} IPAddressACL;
/* description of each stream of the ffserver.conf file */
typedef struct FFStream {
enum StreamType stream_type;
char filename[1024]; /* stream filename */
struct FFStream *feed; /* feed we are using (can be null if
coming from file) */
AVDictionary *in_opts; /* input parameters */
AVInputFormat *ifmt; /* if non NULL, force input format */
AVOutputFormat *fmt;
IPAddressACL *acl;
char dynamic_acl[1024];
int nb_streams;
int prebuffer; /* Number of millseconds early to start */
int64_t max_time; /* Number of milliseconds to run */
int send_on_key;
AVStream *streams[MAX_STREAMS];
int feed_streams[MAX_STREAMS]; /* index of streams in the feed */
char feed_filename[1024]; /* file name of the feed storage, or
input file name for a stream */
char author[512];
char title[512];
char copyright[512];
char comment[512];
pid_t pid; /* Of ffmpeg process */
time_t pid_start; /* Of ffmpeg process */
char **child_argv;
struct FFStream *next;
unsigned bandwidth; /* bandwidth, in kbits/s */
/* RTSP options */
char *rtsp_option;
/* multicast specific */
int is_multicast;
struct in_addr multicast_ip;
int multicast_port; /* first port used for multicast */
int multicast_ttl;
int loop; /* if true, send the stream in loops (only meaningful if file) */
/* feed specific */
int feed_opened; /* true if someone is writing to the feed */
int is_feed; /* true if it is a feed */
int readonly; /* True if writing is prohibited to the file */
int truncate; /* True if feeder connection truncate the feed file */
int conns_served;
int64_t bytes_served;
int64_t feed_max_size; /* maximum storage size, zero means unlimited */
int64_t feed_write_index; /* current write position in feed (it wraps around) */
int64_t feed_size; /* current size of feed */
struct FFStream *next_feed;
} FFStream;
typedef struct FeedData {
long long data_count;
float avg_frame_size; /* frame size averaged over last frames with exponential mean */
} FeedData;
static struct sockaddr_in my_http_addr;
static struct sockaddr_in my_rtsp_addr;
static char logfilename[1024];
static HTTPContext *first_http_ctx;
static FFStream *first_feed; /* contains only feeds */
static FFStream *first_stream; /* contains all streams, including feeds */
static void new_connection(int server_fd, int is_rtsp);
static void close_connection(HTTPContext *c);
/* HTTP handling */
static int handle_connection(HTTPContext *c);
static int http_parse_request(HTTPContext *c);
static int http_send_data(HTTPContext *c);
static void compute_status(HTTPContext *c);
static int open_input_stream(HTTPContext *c, const char *info);
static int http_start_receive_data(HTTPContext *c);
static int http_receive_data(HTTPContext *c);
/* RTSP handling */
static int rtsp_parse_request(HTTPContext *c);
static void rtsp_cmd_describe(HTTPContext *c, const char *url);
static void rtsp_cmd_options(HTTPContext *c, const char *url);
static void rtsp_cmd_setup(HTTPContext *c, const char *url, RTSPMessageHeader *h);
static void rtsp_cmd_play(HTTPContext *c, const char *url, RTSPMessageHeader *h);
static void rtsp_cmd_pause(HTTPContext *c, const char *url, RTSPMessageHeader *h);
static void rtsp_cmd_teardown(HTTPContext *c, const char *url, RTSPMessageHeader *h);
/* SDP handling */
static int prepare_sdp_description(FFStream *stream, uint8_t **pbuffer,
struct in_addr my_ip);
/* RTP handling */
static HTTPContext *rtp_new_connection(struct sockaddr_in *from_addr,
FFStream *stream, const char *session_id,
enum RTSPLowerTransport rtp_protocol);
static int rtp_new_av_stream(HTTPContext *c,
int stream_index, struct sockaddr_in *dest_addr,
HTTPContext *rtsp_c);
static const char *my_program_name;
static const char *my_program_dir;
static const char *config_filename = "/etc/ffserver.conf";
static int ffserver_debug;
static int ffserver_daemon;
static int no_launch;
static int need_to_start_children;
/* maximum number of simultaneous HTTP connections */
static unsigned int nb_max_http_connections = 2000;
static unsigned int nb_max_connections = 5;
static unsigned int nb_connections;
static uint64_t max_bandwidth = 1000;
static uint64_t current_bandwidth;
static int64_t cur_time; // Making this global saves on passing it around everywhere
static AVLFG random_state;
static FILE *logfile = NULL;
/* FIXME: make ffserver work with IPv6 */
void av_noreturn exit_program(int ret)
{
exit(ret);
}
/* resolve host with also IP address parsing */
static int resolve_host(struct in_addr *sin_addr, const char *hostname)
{
if (!ff_inet_aton(hostname, sin_addr)) {
#if HAVE_GETADDRINFO
struct addrinfo *ai, *cur;
struct addrinfo hints = { 0 };
hints.ai_family = AF_INET;
if (getaddrinfo(hostname, NULL, &hints, &ai))
return -1;
/* getaddrinfo returns a linked list of addrinfo structs.
* Even if we set ai_family = AF_INET above, make sure
* that the returned one actually is of the correct type. */
for (cur = ai; cur; cur = cur->ai_next) {
if (cur->ai_family == AF_INET) {
*sin_addr = ((struct sockaddr_in *)cur->ai_addr)->sin_addr;
freeaddrinfo(ai);
return 0;
}
}
freeaddrinfo(ai);
return -1;
#else
struct hostent *hp;
hp = gethostbyname(hostname);
if (!hp)
return -1;
memcpy(sin_addr, hp->h_addr_list[0], sizeof(struct in_addr));
#endif
}
return 0;
}
static char *ctime1(char *buf2)
{
time_t ti;
char *p;
ti = time(NULL);
p = ctime(&ti);
strcpy(buf2, p);
p = buf2 + strlen(p) - 1;
if (*p == '\n')
*p = '\0';
return buf2;
}
static void http_vlog(const char *fmt, va_list vargs)
{
static int print_prefix = 1;
if (logfile) {
if (print_prefix) {
char buf[32];
ctime1(buf);
fprintf(logfile, "%s ", buf);
}
print_prefix = strstr(fmt, "\n") != NULL;
vfprintf(logfile, fmt, vargs);
fflush(logfile);
}
}
#ifdef __GNUC__
__attribute__ ((format (printf, 1, 2)))
#endif
static void http_log(const char *fmt, ...)
{
va_list vargs;
va_start(vargs, fmt);
http_vlog(fmt, vargs);
va_end(vargs);
}
static void http_av_log(void *ptr, int level, const char *fmt, va_list vargs)
{
static int print_prefix = 1;
AVClass *avc = ptr ? *(AVClass**)ptr : NULL;
if (level > av_log_get_level())
return;
if (print_prefix && avc)
http_log("[%s @ %p]", avc->item_name(ptr), ptr);
print_prefix = strstr(fmt, "\n") != NULL;
http_vlog(fmt, vargs);
}
static void log_connection(HTTPContext *c)
{
if (c->suppress_log)
return;
http_log("%s - - [%s] \"%s %s\" %d %"PRId64"\n",
inet_ntoa(c->from_addr.sin_addr), c->method, c->url,
c->protocol, (c->http_error ? c->http_error : 200), c->data_count);
}
static void update_datarate(DataRateData *drd, int64_t count)
{
if (!drd->time1 && !drd->count1) {
drd->time1 = drd->time2 = cur_time;
drd->count1 = drd->count2 = count;
} else if (cur_time - drd->time2 > 5000) {
drd->time1 = drd->time2;
drd->count1 = drd->count2;
drd->time2 = cur_time;
drd->count2 = count;
}
}
/* In bytes per second */
static int compute_datarate(DataRateData *drd, int64_t count)
{
if (cur_time == drd->time1)
return 0;
return ((count - drd->count1) * 1000) / (cur_time - drd->time1);
}
static void start_children(FFStream *feed)
{
if (no_launch)
return;
for (; feed; feed = feed->next) {
if (feed->child_argv && !feed->pid) {
feed->pid_start = time(0);
feed->pid = fork();
if (feed->pid < 0) {
http_log("Unable to create children\n");
exit(1);
}
if (!feed->pid) {
/* In child */
char pathname[1024];
char *slash;
int i;
av_strlcpy(pathname, my_program_name, sizeof(pathname));
slash = strrchr(pathname, '/');
if (!slash)
slash = pathname;
else
slash++;
strcpy(slash, "ffmpeg");
http_log("Launch command line: ");
http_log("%s ", pathname);
for (i = 1; feed->child_argv[i] && feed->child_argv[i][0]; i++)
http_log("%s ", feed->child_argv[i]);
http_log("\n");
for (i = 3; i < 256; i++)
close(i);
if (!ffserver_debug) {
i = open("/dev/null", O_RDWR);
if (i != -1) {
dup2(i, 0);
dup2(i, 1);
dup2(i, 2);
close(i);
}
}
/* This is needed to make relative pathnames work */
if (chdir(my_program_dir) < 0) {
http_log("chdir failed\n");
exit(1);
}
signal(SIGPIPE, SIG_DFL);
execvp(pathname, feed->child_argv);
_exit(1);
}
}
}
}
/* open a listening socket */
static int socket_open_listen(struct sockaddr_in *my_addr)
{
int server_fd, tmp;
server_fd = socket(AF_INET,SOCK_STREAM,0);
if (server_fd < 0) {
perror ("socket");
return -1;
}
tmp = 1;
setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof(tmp));
my_addr->sin_family = AF_INET;
if (bind (server_fd, (struct sockaddr *) my_addr, sizeof (*my_addr)) < 0) {
char bindmsg[32];
snprintf(bindmsg, sizeof(bindmsg), "bind(port %d)", ntohs(my_addr->sin_port));
perror (bindmsg);
closesocket(server_fd);
return -1;
}
if (listen (server_fd, 5) < 0) {
perror ("listen");
closesocket(server_fd);
return -1;
}
ff_socket_nonblock(server_fd, 1);
return server_fd;
}
/* start all multicast streams */
static void start_multicast(void)
{
FFStream *stream;
char session_id[32];
HTTPContext *rtp_c;
struct sockaddr_in dest_addr;
int default_port, stream_index;
default_port = 6000;
for(stream = first_stream; stream != NULL; stream = stream->next) {
if (stream->is_multicast) {
unsigned random0 = av_lfg_get(&random_state);
unsigned random1 = av_lfg_get(&random_state);
/* open the RTP connection */
snprintf(session_id, sizeof(session_id), "%08x%08x",
random0, random1);
/* choose a port if none given */
if (stream->multicast_port == 0) {
stream->multicast_port = default_port;
default_port += 100;
}
dest_addr.sin_family = AF_INET;
dest_addr.sin_addr = stream->multicast_ip;
dest_addr.sin_port = htons(stream->multicast_port);
rtp_c = rtp_new_connection(&dest_addr, stream, session_id,
RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
if (!rtp_c)
continue;
if (open_input_stream(rtp_c, "") < 0) {
http_log("Could not open input stream for stream '%s'\n",
stream->filename);
continue;
}
/* open each RTP stream */
for(stream_index = 0; stream_index < stream->nb_streams;
stream_index++) {
dest_addr.sin_port = htons(stream->multicast_port +
2 * stream_index);
if (rtp_new_av_stream(rtp_c, stream_index, &dest_addr, NULL) < 0) {
http_log("Could not open output stream '%s/streamid=%d'\n",
stream->filename, stream_index);
exit(1);
}
}
/* change state to send data */
rtp_c->state = HTTPSTATE_SEND_DATA;
}
}
}
/* main loop of the http server */
static int http_server(void)
{
int server_fd = 0, rtsp_server_fd = 0;
int ret, delay, delay1;
struct pollfd *poll_table, *poll_entry;
HTTPContext *c, *c_next;
if(!(poll_table = av_mallocz((nb_max_http_connections + 2)*sizeof(*poll_table)))) {
http_log("Impossible to allocate a poll table handling %d connections.\n", nb_max_http_connections);
return -1;
}
if (my_http_addr.sin_port) {
server_fd = socket_open_listen(&my_http_addr);
if (server_fd < 0)
return -1;
}
if (my_rtsp_addr.sin_port) {
rtsp_server_fd = socket_open_listen(&my_rtsp_addr);
if (rtsp_server_fd < 0)
return -1;
}
if (!rtsp_server_fd && !server_fd) {
http_log("HTTP and RTSP disabled.\n");
return -1;
}
http_log("FFserver started.\n");
start_children(first_feed);
start_multicast();
for(;;) {
poll_entry = poll_table;
if (server_fd) {
poll_entry->fd = server_fd;
poll_entry->events = POLLIN;
poll_entry++;
}
if (rtsp_server_fd) {
poll_entry->fd = rtsp_server_fd;
poll_entry->events = POLLIN;
poll_entry++;
}
/* wait for events on each HTTP handle */
c = first_http_ctx;
delay = 1000;
while (c != NULL) {
int fd;
fd = c->fd;
switch(c->state) {
case HTTPSTATE_SEND_HEADER:
case RTSPSTATE_SEND_REPLY:
case RTSPSTATE_SEND_PACKET:
c->poll_entry = poll_entry;
poll_entry->fd = fd;
poll_entry->events = POLLOUT;
poll_entry++;
break;
case HTTPSTATE_SEND_DATA_HEADER:
case HTTPSTATE_SEND_DATA:
case HTTPSTATE_SEND_DATA_TRAILER:
if (!c->is_packetized) {
/* for TCP, we output as much as we can (may need to put a limit) */
c->poll_entry = poll_entry;
poll_entry->fd = fd;
poll_entry->events = POLLOUT;
poll_entry++;
} else {
/* when ffserver is doing the timing, we work by
looking at which packet need to be sent every
10 ms */
delay1 = 10; /* one tick wait XXX: 10 ms assumed */
if (delay1 < delay)
delay = delay1;
}
break;
case HTTPSTATE_WAIT_REQUEST:
case HTTPSTATE_RECEIVE_DATA:
case HTTPSTATE_WAIT_FEED:
case RTSPSTATE_WAIT_REQUEST:
/* need to catch errors */
c->poll_entry = poll_entry;
poll_entry->fd = fd;
poll_entry->events = POLLIN;/* Maybe this will work */
poll_entry++;
break;
default:
c->poll_entry = NULL;
break;
}
c = c->next;
}
/* wait for an event on one connection. We poll at least every
second to handle timeouts */
do {
ret = poll(poll_table, poll_entry - poll_table, delay);
if (ret < 0 && ff_neterrno() != AVERROR(EAGAIN) &&
ff_neterrno() != AVERROR(EINTR))
return -1;
} while (ret < 0);
cur_time = av_gettime() / 1000;
if (need_to_start_children) {
need_to_start_children = 0;
start_children(first_feed);
}
/* now handle the events */
for(c = first_http_ctx; c != NULL; c = c_next) {
c_next = c->next;
if (handle_connection(c) < 0) {
/* close and free the connection */
log_connection(c);
close_connection(c);
}
}
poll_entry = poll_table;
if (server_fd) {
/* new HTTP connection request ? */
if (poll_entry->revents & POLLIN)
new_connection(server_fd, 0);
poll_entry++;
}
if (rtsp_server_fd) {
/* new RTSP connection request ? */
if (poll_entry->revents & POLLIN)
new_connection(rtsp_server_fd, 1);
}
}
}
/* start waiting for a new HTTP/RTSP request */
static void start_wait_request(HTTPContext *c, int is_rtsp)
{
c->buffer_ptr = c->buffer;
c->buffer_end = c->buffer + c->buffer_size - 1; /* leave room for '\0' */
if (is_rtsp) {
c->timeout = cur_time + RTSP_REQUEST_TIMEOUT;
c->state = RTSPSTATE_WAIT_REQUEST;
} else {
c->timeout = cur_time + HTTP_REQUEST_TIMEOUT;
c->state = HTTPSTATE_WAIT_REQUEST;
}
}
static void http_send_too_busy_reply(int fd)
{
char buffer[400];
int len = snprintf(buffer, sizeof(buffer),
"HTTP/1.0 503 Server too busy\r\n"
"Content-type: text/html\r\n"
"\r\n"
"<html><head><title>Too busy</title></head><body>\r\n"
"<p>The server is too busy to serve your request at this time.</p>\r\n"
"<p>The number of current connections is %d, and this exceeds the limit of %d.</p>\r\n"
"</body></html>\r\n",
nb_connections, nb_max_connections);
av_assert0(len < sizeof(buffer));
send(fd, buffer, len, 0);
}
static void new_connection(int server_fd, int is_rtsp)
{
struct sockaddr_in from_addr;
int fd, len;
HTTPContext *c = NULL;
len = sizeof(from_addr);
fd = accept(server_fd, (struct sockaddr *)&from_addr,
&len);
if (fd < 0) {
http_log("error during accept %s\n", strerror(errno));
return;
}
ff_socket_nonblock(fd, 1);
if (nb_connections >= nb_max_connections) {
http_send_too_busy_reply(fd);
goto fail;
}
/* add a new connection */
c = av_mallocz(sizeof(HTTPContext));
if (!c)
goto fail;
c->fd = fd;
c->poll_entry = NULL;
c->from_addr = from_addr;
c->buffer_size = IOBUFFER_INIT_SIZE;
c->buffer = av_malloc(c->buffer_size);
if (!c->buffer)
goto fail;
c->next = first_http_ctx;
first_http_ctx = c;
nb_connections++;
start_wait_request(c, is_rtsp);
return;
fail:
if (c) {
av_free(c->buffer);
av_free(c);
}
closesocket(fd);
}
static void close_connection(HTTPContext *c)
{
HTTPContext **cp, *c1;
int i, nb_streams;
AVFormatContext *ctx;
URLContext *h;
AVStream *st;
/* remove connection from list */
cp = &first_http_ctx;
while ((*cp) != NULL) {
c1 = *cp;
if (c1 == c)
*cp = c->next;
else
cp = &c1->next;
}
/* remove references, if any (XXX: do it faster) */
for(c1 = first_http_ctx; c1 != NULL; c1 = c1->next) {
if (c1->rtsp_c == c)
c1->rtsp_c = NULL;
}
/* remove connection associated resources */
if (c->fd >= 0)
closesocket(c->fd);
if (c->fmt_in) {
/* close each frame parser */
for(i=0;i<c->fmt_in->nb_streams;i++) {
st = c->fmt_in->streams[i];
if (st->codec->codec)
avcodec_close(st->codec);
}
avformat_close_input(&c->fmt_in);
}
/* free RTP output streams if any */
nb_streams = 0;
if (c->stream)
nb_streams = c->stream->nb_streams;
for(i=0;i<nb_streams;i++) {
ctx = c->rtp_ctx[i];
if (ctx) {
av_write_trailer(ctx);
av_dict_free(&ctx->metadata);
av_free(ctx->streams[0]);
av_free(ctx);
}
h = c->rtp_handles[i];
if (h)
ffurl_close(h);
}
ctx = &c->fmt_ctx;
if (!c->last_packet_sent && c->state == HTTPSTATE_SEND_DATA_TRAILER) {
if (ctx->oformat) {
/* prepare header */
if (avio_open_dyn_buf(&ctx->pb) >= 0) {
av_write_trailer(ctx);
av_freep(&c->pb_buffer);
avio_close_dyn_buf(ctx->pb, &c->pb_buffer);
}
}
}
for(i=0; i<ctx->nb_streams; i++)
av_free(ctx->streams[i]);
if (c->stream && !c->post && c->stream->stream_type == STREAM_TYPE_LIVE)
current_bandwidth -= c->stream->bandwidth;
/* signal that there is no feed if we are the feeder socket */
if (c->state == HTTPSTATE_RECEIVE_DATA && c->stream) {
c->stream->feed_opened = 0;
close(c->feed_fd);
}
av_freep(&c->pb_buffer);
av_freep(&c->packet_buffer);
av_free(c->buffer);
av_free(c);
nb_connections--;
}
static int handle_connection(HTTPContext *c)
{
int len, ret;
switch(c->state) {
case HTTPSTATE_WAIT_REQUEST:
case RTSPSTATE_WAIT_REQUEST:
/* timeout ? */
if ((c->timeout - cur_time) < 0)
return -1;
if (c->poll_entry->revents & (POLLERR | POLLHUP))
return -1;
/* no need to read if no events */
if (!(c->poll_entry->revents & POLLIN))
return 0;
/* read the data */
read_loop:
len = recv(c->fd, c->buffer_ptr, 1, 0);
if (len < 0) {
if (ff_neterrno() != AVERROR(EAGAIN) &&
ff_neterrno() != AVERROR(EINTR))
return -1;
} else if (len == 0) {
return -1;
} else {
/* search for end of request. */
uint8_t *ptr;
c->buffer_ptr += len;
ptr = c->buffer_ptr;
if ((ptr >= c->buffer + 2 && !memcmp(ptr-2, "\n\n", 2)) ||
(ptr >= c->buffer + 4 && !memcmp(ptr-4, "\r\n\r\n", 4))) {
/* request found : parse it and reply */
if (c->state == HTTPSTATE_WAIT_REQUEST) {
ret = http_parse_request(c);
} else {
ret = rtsp_parse_request(c);
}
if (ret < 0)
return -1;
} else if (ptr >= c->buffer_end) {
/* request too long: cannot do anything */
return -1;
} else goto read_loop;
}
break;
case HTTPSTATE_SEND_HEADER:
if (c->poll_entry->revents & (POLLERR | POLLHUP))
return -1;
/* no need to write if no events */
if (!(c->poll_entry->revents & POLLOUT))
return 0;
len = send(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr, 0);
if (len < 0) {
if (ff_neterrno() != AVERROR(EAGAIN) &&
ff_neterrno() != AVERROR(EINTR)) {
/* error : close connection */
av_freep(&c->pb_buffer);
return -1;
}
} else {
c->buffer_ptr += len;
if (c->stream)
c->stream->bytes_served += len;
c->data_count += len;
if (c->buffer_ptr >= c->buffer_end) {
av_freep(&c->pb_buffer);
/* if error, exit */
if (c->http_error)
return -1;
/* all the buffer was sent : synchronize to the incoming stream */
c->state = HTTPSTATE_SEND_DATA_HEADER;
c->buffer_ptr = c->buffer_end = c->buffer;
}
}
break;
case HTTPSTATE_SEND_DATA:
case HTTPSTATE_SEND_DATA_HEADER:
case HTTPSTATE_SEND_DATA_TRAILER:
/* for packetized output, we consider we can always write (the
input streams sets the speed). It may be better to verify