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FFmpeg/ffserver.c
Tobias Stoeckmann 95d9a85ca3 ffserver: local OOB write with custom program name 
When the command line for children is created, it is assumed that
my_program_name always ends with "ffserver", which doesn't have to
be true if ffserver is called through a symbolic link.

In such a case, it could be that not enough space for "ffmpeg" is
available at the end, leading to a buffer overflow.

One example would be:

$ ln -s /usr/bin/ffserver ~/f; ~/f

As this is only a local buffer overflow, i.e. is based on a weird
program call, this has NO security impact.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2017-01-08 03:50:56 +01:00

4027 lines
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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 <stdio.h>
#include "libavformat/avformat.h"
/* FIXME: those are internal headers, ffserver _really_ shouldn't use them */
#include "libavformat/rtpproto.h"
#include "libavformat/rtsp.h"
#include "libavformat/avio_internal.h"
#include "libavformat/internal.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/lfg.h"
#include "libavutil/dict.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/random_seed.h"
#include "libavutil/rational.h"
#include "libavutil/parseutils.h"
#include "libavutil/opt.h"
#include "libavutil/time.h"
#include <stdarg.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#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>
#include "cmdutils.h"
#include "ffserver_config.h"
#define PATH_LENGTH 1024
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 * const 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 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 FFServerStream *stream;
/* -1 is invalid stream */
int feed_streams[FFSERVER_MAX_STREAMS]; /* index of streams in the feed */
int switch_feed_streams[FFSERVER_MAX_STREAMS]; /* index of streams in the feed */
int switch_pending;
AVFormatContext *pfmt_ctx; /* instance of FFServerStream 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];
char clean_url[128*7];
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[FFSERVER_MAX_STREAMS];
/* RTP/UDP specific */
URLContext *rtp_handles[FFSERVER_MAX_STREAMS];
/* RTP/TCP specific */
struct HTTPContext *rtsp_c;
uint8_t *packet_buffer, *packet_buffer_ptr, *packet_buffer_end;
} HTTPContext;
static HTTPContext *first_http_ctx;
static FFServerConfig config = {
.nb_max_http_connections = 2000,
.nb_max_connections = 5,
.max_bandwidth = 1000,
.use_defaults = 1,
};
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 inline void print_stream_params(AVIOContext *pb, FFServerStream *stream);
static void compute_status(HTTPContext *c);
static int open_input_stream(HTTPContext *c, const char *info);
static int http_parse_request(HTTPContext *c);
static int http_send_data(HTTPContext *c);
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_interrupt(HTTPContext *c, const char *url,
RTSPMessageHeader *h, int pause_only);
/* SDP handling */
static int prepare_sdp_description(FFServerStream *stream, uint8_t **pbuffer,
struct in_addr my_ip);
/* RTP handling */
static HTTPContext *rtp_new_connection(struct sockaddr_in *from_addr,
FFServerStream *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);
/* utils */
static size_t htmlencode (const char *src, char **dest);
static inline void cp_html_entity (char *buffer, const char *entity);
static inline int check_codec_match(LayeredAVStream *ccf, AVStream *ccs, int stream);
static const char *my_program_name;
static int no_launch;
static int need_to_start_children;
/* maximum number of simultaneous HTTP connections */
static unsigned int nb_connections;
static uint64_t current_bandwidth;
/* Making this global saves on passing it around everywhere */
static int64_t cur_time;
static AVLFG random_state;
static FILE *logfile = NULL;
static void unlayer_stream(AVStream *st, LayeredAVStream *lst)
{
avcodec_free_context(&st->codec);
avcodec_parameters_free(&st->codecpar);
#define COPY(a) st->a = lst->a;
COPY(index)
COPY(id)
COPY(codec)
COPY(codecpar)
COPY(time_base)
COPY(pts_wrap_bits)
COPY(sample_aspect_ratio)
COPY(recommended_encoder_configuration)
}
static inline void cp_html_entity (char *buffer, const char *entity) {
if (!buffer || !entity)
return;
while (*entity)
*buffer++ = *entity++;
}
/**
* Substitutes known conflicting chars on a text string with
* their corresponding HTML entities.
*
* Returns the number of bytes in the 'encoded' representation
* not including the terminating NUL.
*/
static size_t htmlencode (const char *src, char **dest) {
const char *amp = "&amp;";
const char *lt = "&lt;";
const char *gt = "&gt;";
const char *start;
char *tmp;
size_t final_size = 0;
if (!src)
return 0;
start = src;
/* Compute needed dest size */
while (*src != '\0') {
switch(*src) {
case 38: /* & */
final_size += 5;
break;
case 60: /* < */
case 62: /* > */
final_size += 4;
break;
default:
final_size++;
}
src++;
}
src = start;
*dest = av_mallocz(final_size + 1);
if (!*dest)
return 0;
/* Build dest */
tmp = *dest;
while (*src != '\0') {
switch(*src) {
case 38: /* & */
cp_html_entity (tmp, amp);
tmp += 5;
break;
case 60: /* < */
cp_html_entity (tmp, lt);
tmp += 4;
break;
case 62: /* > */
cp_html_entity (tmp, gt);
tmp += 4;
break;
default:
*tmp = *src;
tmp += 1;
}
src++;
}
*tmp = '\0';
return final_size;
}
static int64_t ffm_read_write_index(int fd)
{
uint8_t buf[8];
if (lseek(fd, 8, SEEK_SET) < 0)
return AVERROR(EIO);
if (read(fd, buf, 8) != 8)
return AVERROR(EIO);
return AV_RB64(buf);
}
static int ffm_write_write_index(int fd, int64_t pos)
{
uint8_t buf[8];
int i;
for(i=0;i<8;i++)
buf[i] = (pos >> (56 - i * 8)) & 0xff;
if (lseek(fd, 8, SEEK_SET) < 0)
goto bail_eio;
if (write(fd, buf, 8) != 8)
goto bail_eio;
return 8;
bail_eio:
return AVERROR(EIO);
}
static void ffm_set_write_index(AVFormatContext *s, int64_t pos,
int64_t file_size)
{
av_opt_set_int(s, "server_attached", 1, AV_OPT_SEARCH_CHILDREN);
av_opt_set_int(s, "ffm_write_index", pos, AV_OPT_SEARCH_CHILDREN);
av_opt_set_int(s, "ffm_file_size", file_size, AV_OPT_SEARCH_CHILDREN);
}
static char *ctime1(char *buf2, size_t buf_size)
{
time_t ti;
char *p;
ti = time(NULL);
p = ctime(&ti);
if (!p || !*p) {
*buf2 = '\0';
return buf2;
}
av_strlcpy(buf2, p, buf_size);
p = buf2 + strlen(buf2) - 1;
if (*p == '\n')
*p = '\0';
return buf2;
}
static void http_vlog(const char *fmt, va_list vargs)
{
static int print_prefix = 1;
char buf[32];
if (!logfile)
return;
if (print_prefix) {
ctime1(buf, sizeof(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(FFServerStream *feed)
{
char *pathname;
char *slash;
int i;
size_t cmd_length;
if (no_launch)
return;
cmd_length = strlen(my_program_name);
/**
* FIXME: WIP Safeguard. Remove after clearing all harcoded
* '1024' path lengths
*/
if (cmd_length > PATH_LENGTH - 1) {
http_log("Could not start children. Command line: '%s' exceeds "
"path length limit (%d)\n", my_program_name, PATH_LENGTH);
return;
}
slash = strrchr(my_program_name, '/');
if (!slash) {
pathname = av_mallocz(sizeof("ffmpeg"));
} else {
pathname = av_mallocz(slash - my_program_name + sizeof("ffmpeg"));
if (pathname != NULL) {
memcpy(pathname, my_program_name, slash - my_program_name);
}
}
if (!pathname) {
http_log("Could not allocate memory for children cmd line\n");
return;
}
/* use "ffmpeg" in the path of current program. Ignore user provided path */
strcat(pathname, "ffmpeg");
for (; feed; feed = feed->next) {
if (!feed->child_argv || feed->pid)
continue;
feed->pid_start = time(0);
feed->pid = fork();
if (feed->pid < 0) {
http_log("Unable to create children: %s\n", strerror(errno));
av_free (pathname);
exit(EXIT_FAILURE);
}
if (feed->pid)
continue;
/* In child */
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 (!config.debug) {
if (!freopen("/dev/null", "r", stdin))
http_log("failed to redirect STDIN to /dev/null\n;");
if (!freopen("/dev/null", "w", stdout))
http_log("failed to redirect STDOUT to /dev/null\n;");
if (!freopen("/dev/null", "w", stderr))
http_log("failed to redirect STDERR to /dev/null\n;");
}
signal(SIGPIPE, SIG_DFL);
execvp(pathname, feed->child_argv);
av_free (pathname);
_exit(1);
}
av_free (pathname);
}
/* 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;
if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof(tmp)))
av_log(NULL, AV_LOG_WARNING, "setsockopt SO_REUSEADDR failed\n");
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);
goto fail;
}
if (listen (server_fd, 5) < 0) {
perror ("listen");
goto fail;
}
if (ff_socket_nonblock(server_fd, 1) < 0)
av_log(NULL, AV_LOG_WARNING, "ff_socket_nonblock failed\n");
return server_fd;
fail:
closesocket(server_fd);
return -1;
}
/* start all multicast streams */
static void start_multicast(void)
{
FFServerStream *stream;
char session_id[32];
HTTPContext *rtp_c;
struct sockaddr_in dest_addr = {0};
int default_port, stream_index;
unsigned int random0, random1;
default_port = 6000;
for(stream = config.first_stream; stream; stream = stream->next) {
if (!stream->is_multicast)
continue;
random0 = av_lfg_get(&random_state);
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)
continue;
http_log("Could not open output stream '%s/streamid=%d'\n",
stream->filename, stream_index);
exit(1);
}
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;
struct pollfd *poll_table, *poll_entry;
HTTPContext *c, *c_next;
poll_table = av_mallocz_array(config.nb_max_http_connections + 2,
sizeof(*poll_table));
if(!poll_table) {
http_log("Impossible to allocate a poll table handling %d "
"connections.\n", config.nb_max_http_connections);
return -1;
}
if (config.http_addr.sin_port) {
server_fd = socket_open_listen(&config.http_addr);
if (server_fd < 0)
goto quit;
}
if (config.rtsp_addr.sin_port) {
rtsp_server_fd = socket_open_listen(&config.rtsp_addr);
if (rtsp_server_fd < 0) {
closesocket(server_fd);
goto quit;
}
}
if (!rtsp_server_fd && !server_fd) {
http_log("HTTP and RTSP disabled.\n");
goto quit;
}
http_log("FFserver started.\n");
start_children(config.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) {
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 needs to be sent every
* 10 ms (one tick wait XXX: 10 ms assumed) */
if (delay > 10)
delay = 10;
}
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)) {
goto quit;
}
} while (ret < 0);
cur_time = av_gettime() / 1000;
if (need_to_start_children) {
need_to_start_children = 0;
start_children(config.first_feed);
}
/* now handle the events */
for(c = first_http_ctx; c; c = c_next) {
c_next = c->next;
if (handle_connection(c) < 0) {
log_connection(c);
/* close and free the connection */
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);
}
}
quit:
av_free(poll_table);
return -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' */
c->state = is_rtsp ? RTSPSTATE_WAIT_REQUEST : HTTPSTATE_WAIT_REQUEST;
c->timeout = cur_time +
(is_rtsp ? RTSP_REQUEST_TIMEOUT : HTTP_REQUEST_TIMEOUT);
}
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"
"<!DOCTYPE html>\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 %u, and this "
"exceeds the limit of %u.</p>\r\n"
"</body></html>\r\n",
nb_connections, config.nb_max_connections);
av_assert0(len < sizeof(buffer));
if (send(fd, buffer, len, 0) < len)
av_log(NULL, AV_LOG_WARNING,
"Could not send too-busy reply, send() failed\n");
}
static void new_connection(int server_fd, int is_rtsp)
{
struct sockaddr_in from_addr;
socklen_t len;
int fd;
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;
}
if (ff_socket_nonblock(fd, 1) < 0)
av_log(NULL, AV_LOG_WARNING, "ff_socket_nonblock failed\n");
if (nb_connections >= config.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_freep(&c->buffer);
av_free(c);
}
closesocket(fd);
}
static void close_connection(HTTPContext *c)
{
HTTPContext **cp, *c1;
int i, nb_streams;
AVFormatContext *ctx;
AVStream *st;
/* remove connection from list */
cp = &first_http_ctx;
while (*cp) {
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; 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_freep(&ctx->streams[0]);
av_freep(&ctx);
}
ffurl_close(c->rtp_handles[i]);
}
ctx = c->pfmt_ctx;
if (ctx) {
if (!c->last_packet_sent && c->state == HTTPSTATE_SEND_DATA_TRAILER) {
/* prepare header */
if (ctx->oformat && 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_freep(&ctx->streams[i]);
av_freep(&ctx->streams);
av_freep(&ctx->priv_data);
}
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_freep(&c->buffer);
av_free(c);
nb_connections--;
}
static int handle_connection(HTTPContext *c)
{
int len, ret;
uint8_t *ptr;
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:
if (!(len = recv(c->fd, c->buffer_ptr, 1, 0)))
return -1;
if (len < 0) {
if (ff_neterrno() != AVERROR(EAGAIN) &&
ff_neterrno() != AVERROR(EINTR))
return -1;
break;
}
/* search for end of request. */
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)) {
goto close_connection;
}
break;
}
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 set the speed). It may be better to verify
* that we do not rely too much on the kernel queues */
if (!c->is_packetized) {
if (c->poll_entry->revents & (POLLERR | POLLHUP))
return -1;
/* no need to read if no events */
if (!(c->poll_entry->revents & POLLOUT))
return 0;
}
if (http_send_data(c) < 0)
return -1;
/* close connection if trailer sent */
if (c->state == HTTPSTATE_SEND_DATA_TRAILER)
return -1;
/* Check if it is a single jpeg frame 123 */
if (c->stream->single_frame && c->data_count > c->cur_frame_bytes && c->cur_frame_bytes > 0) {
close_connection(c);
}
break;
case HTTPSTATE_RECEIVE_DATA:
/* no need to read if no events */
if (c->poll_entry->revents & (POLLERR | POLLHUP))
return -1;
if (!(c->poll_entry->revents & POLLIN))
return 0;
if (http_receive_data(c) < 0)
return -1;
break;
case HTTPSTATE_WAIT_FEED:
/* no need to read if no events */
if (c->poll_entry->revents & (POLLIN | POLLERR | POLLHUP))
return -1;
/* nothing to do, we'll be waken up by incoming feed packets */
break;
case RTSPSTATE_SEND_REPLY:
if (c->poll_entry->revents & (POLLERR | POLLHUP))
goto close_connection;
/* 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)) {
goto close_connection;
}
break;
}
c->buffer_ptr += len;
c->data_count += len;
if (c->buffer_ptr >= c->buffer_end) {
/* all the buffer was sent : wait for a new request */
av_freep(&c->pb_buffer);
start_wait_request(c, 1);
}
break;
case RTSPSTATE_SEND_PACKET:
if (c->poll_entry->revents & (POLLERR | POLLHUP)) {
av_freep(&c->packet_buffer);
return -1;
}
/* no need to write if no events */
if (!(c->poll_entry->revents & POLLOUT))
return 0;
len = send(c->fd, c->packet_buffer_ptr,
c->packet_buffer_end - c->packet_buffer_ptr, 0);
if (len < 0) {
if (ff_neterrno() != AVERROR(EAGAIN) &&
ff_neterrno() != AVERROR(EINTR)) {
/* error : close connection */
av_freep(&c->packet_buffer);
return -1;
}
break;
}
c->packet_buffer_ptr += len;
if (c->packet_buffer_ptr >= c->packet_buffer_end) {
/* all the buffer was sent : wait for a new request */
av_freep(&c->packet_buffer);
c->state = RTSPSTATE_WAIT_REQUEST;
}
break;
case HTTPSTATE_READY:
/* nothing to do */
break;
default:
return -1;
}
return 0;
close_connection:
av_freep(&c->pb_buffer);
return -1;
}
static int extract_rates(char *rates, int ratelen, const char *request)
{
const char *p;
for (p = request; *p && *p != '\r' && *p != '\n'; ) {
if (av_strncasecmp(p, "Pragma:", 7) == 0) {
const char *q = p + 7;
while (*q && *q != '\n' && av_isspace(*q))
q++;
if (av_strncasecmp(q, "stream-switch-entry=", 20) == 0) {
int stream_no;
int rate_no;
q += 20;
memset(rates, 0xff, ratelen);
while (1) {
while (*q && *q != '\n' && *q != ':')
q++;
if (sscanf(q, ":%d:%d", &stream_no, &rate_no) != 2)
break;
stream_no--;
if (stream_no < ratelen && stream_no >= 0)
rates[stream_no] = rate_no;
while (*q && *q != '\n' && !av_isspace(*q))
q++;
}
return 1;
}
}
p = strchr(p, '\n');
if (!p)
break;
p++;
}
return 0;
}
static int find_stream_in_feed(FFServerStream *feed, AVCodecParameters *codec,
int bit_rate)
{
int i;
int best_bitrate = 100000000;
int best = -1;
for (i = 0; i < feed->nb_streams; i++) {
AVCodecParameters *feed_codec = feed->streams[i]->codecpar;
if (feed_codec->codec_id != codec->codec_id ||
feed_codec->sample_rate != codec->sample_rate ||
feed_codec->width != codec->width ||
feed_codec->height != codec->height)
continue;
/* Potential stream */
/* We want the fastest stream less than bit_rate, or the slowest
* faster than bit_rate
*/
if (feed_codec->bit_rate <= bit_rate) {
if (best_bitrate > bit_rate ||
feed_codec->bit_rate > best_bitrate) {
best_bitrate = feed_codec->bit_rate;
best = i;
}
continue;
}
if (feed_codec->bit_rate < best_bitrate) {
best_bitrate = feed_codec->bit_rate;
best = i;
}
}
return best;
}
static int modify_current_stream(HTTPContext *c, char *rates)
{
int i;
FFServerStream *req = c->stream;
int action_required = 0;
/* Not much we can do for a feed */
if (!req->feed)
return 0;
for (i = 0; i < req->nb_streams; i++) {
AVCodecParameters *codec = req->streams[i]->codecpar;
switch(rates[i]) {
case 0:
c->switch_feed_streams[i] = req->feed_streams[i];
break;
case 1:
c->switch_feed_streams[i] = find_stream_in_feed(req->feed, codec, codec->bit_rate / 2);
break;
case 2:
/* Wants off or slow */
c->switch_feed_streams[i] = find_stream_in_feed(req->feed, codec, codec->bit_rate / 4);
#ifdef WANTS_OFF
/* This doesn't work well when it turns off the only stream! */
c->switch_feed_streams[i] = -2;
c->feed_streams[i] = -2;
#endif
break;
}
if (c->switch_feed_streams[i] >= 0 &&
c->switch_feed_streams[i] != c->feed_streams[i]) {
action_required = 1;
}
}
return action_required;
}
static void get_word(char *buf, int buf_size, const char **pp)
{
const char *p;
char *q;
#define SPACE_CHARS " \t\r\n"
p = *pp;
p += strspn(p, SPACE_CHARS);
q = buf;
while (!av_isspace(*p) && *p != '\0') {
if ((q - buf) < buf_size - 1)
*q++ = *p;
p++;
}
if (buf_size > 0)
*q = '\0';
*pp = p;
}
static FFServerIPAddressACL* parse_dynamic_acl(FFServerStream *stream,
HTTPContext *c)
{
FILE* f;
char line[1024];
char cmd[1024];
FFServerIPAddressACL *acl = NULL;
int line_num = 0;
const char *p;
f = fopen(stream->dynamic_acl, "r");
if (!f) {
perror(stream->dynamic_acl);
return NULL;
}
acl = av_mallocz(sizeof(FFServerIPAddressACL));
if (!acl) {
fclose(f);
return NULL;
}
/* Build ACL */
while (fgets(line, sizeof(line), f)) {
line_num++;
p = line;
while (av_isspace(*p))
p++;
if (*p == '\0' || *p == '#')
continue;
ffserver_get_arg(cmd, sizeof(cmd), &p);
if (!av_strcasecmp(cmd, "ACL"))
ffserver_parse_acl_row(NULL, NULL, acl, p, stream->dynamic_acl,
line_num);
}
fclose(f);
return acl;
}
static void free_acl_list(FFServerIPAddressACL *in_acl)
{
FFServerIPAddressACL *pacl, *pacl2;
pacl = in_acl;
while(pacl) {
pacl2 = pacl;
pacl = pacl->next;
av_freep(pacl2);
}
}
static int validate_acl_list(FFServerIPAddressACL *in_acl, HTTPContext *c)
{
enum FFServerIPAddressAction last_action = IP_DENY;
FFServerIPAddressACL *acl;
struct in_addr *src = &c->from_addr.sin_addr;
unsigned long src_addr = src->s_addr;
for (acl = in_acl; acl; acl = acl->next) {
if (src_addr >= acl->first.s_addr && src_addr <= acl->last.s_addr)
return (acl->action == IP_ALLOW) ? 1 : 0;
last_action = acl->action;
}
/* Nothing matched, so return not the last action */
return (last_action == IP_DENY) ? 1 : 0;
}
static int validate_acl(FFServerStream *stream, HTTPContext *c)
{
int ret = 0;
FFServerIPAddressACL *acl;
/* if stream->acl is null validate_acl_list will return 1 */
ret = validate_acl_list(stream->acl, c);
if (stream->dynamic_acl[0]) {
acl = parse_dynamic_acl(stream, c);
ret = validate_acl_list(acl, c);
free_acl_list(acl);
}
return ret;
}
/**
* compute the real filename of a file by matching it without its
* extensions to all the stream's filenames
*/
static void compute_real_filename(char *filename, int max_size)
{
char file1[1024];
char file2[1024];
char *p;
FFServerStream *stream;
av_strlcpy(file1, filename, sizeof(file1));
p = strrchr(file1, '.');
if (p)
*p = '\0';
for(stream = config.first_stream; stream; stream = stream->next) {
av_strlcpy(file2, stream->filename, sizeof(file2));
p = strrchr(file2, '.');
if (p)
*p = '\0';
if (!strcmp(file1, file2)) {
av_strlcpy(filename, stream->filename, max_size);
break;
}
}
}
enum RedirType {
REDIR_NONE,
REDIR_ASX,
REDIR_RAM,
REDIR_ASF,
REDIR_RTSP,
REDIR_SDP,
};
/* parse HTTP request and prepare header */
static int http_parse_request(HTTPContext *c)
{
const char *p;
char *p1;
enum RedirType redir_type;
char cmd[32];
char info[1024], filename[1024];
char url[1024], *q;
char protocol[32];
char msg[1024];
char *encoded_msg = NULL;
const char *mime_type;
FFServerStream *stream;
int i;
char ratebuf[32];
const char *useragent = 0;
p = c->buffer;
get_word(cmd, sizeof(cmd), &p);
av_strlcpy(c->method, cmd, sizeof(c->method));
if (!strcmp(cmd, "GET"))
c->post = 0;
else if (!strcmp(cmd, "POST"))
c->post = 1;
else
return -1;
get_word(url, sizeof(url), &p);
av_strlcpy(c->url, url, sizeof(c->url));
get_word(protocol, sizeof(protocol), (const char **)&p);
if (strcmp(protocol, "HTTP/1.0") && strcmp(protocol, "HTTP/1.1"))
return -1;
av_strlcpy(c->protocol, protocol, sizeof(c->protocol));
if (config.debug)
http_log("%s - - New connection: %s %s\n",
inet_ntoa(c->from_addr.sin_addr), cmd, url);
/* find the filename and the optional info string in the request */
p1 = strchr(url, '?');
if (p1) {
av_strlcpy(info, p1, sizeof(info));
*p1 = '\0';
} else
info[0] = '\0';
av_strlcpy(filename, url + ((*url == '/') ? 1 : 0), sizeof(filename)-1);
for (p = c->buffer; *p && *p != '\r' && *p != '\n'; ) {
if (av_strncasecmp(p, "User-Agent:", 11) == 0) {
useragent = p + 11;
if (*useragent && *useragent != '\n' && av_isspace(*useragent))
useragent++;
break;
}
p = strchr(p, '\n');
if (!p)
break;
p++;
}
redir_type = REDIR_NONE;
if (av_match_ext(filename, "asx")) {
redir_type = REDIR_ASX;
filename[strlen(filename)-1] = 'f';
} else if (av_match_ext(filename, "asf") &&
(!useragent || av_strncasecmp(useragent, "NSPlayer", 8))) {
/* if this isn't WMP or lookalike, return the redirector file */
redir_type = REDIR_ASF;
} else if (av_match_ext(filename, "rpm,ram")) {
redir_type = REDIR_RAM;
strcpy(filename + strlen(filename)-2, "m");
} else if (av_match_ext(filename, "rtsp")) {
redir_type = REDIR_RTSP;
compute_real_filename(filename, sizeof(filename) - 1);
} else if (av_match_ext(filename, "sdp")) {
redir_type = REDIR_SDP;
compute_real_filename(filename, sizeof(filename) - 1);
}
/* "redirect" request to index.html */
if (!strlen(filename))
av_strlcpy(filename, "index.html", sizeof(filename) - 1);
stream = config.first_stream;
while (stream) {
if (!strcmp(stream->filename, filename) && validate_acl(stream, c))
break;
stream = stream->next;
}
if (!stream) {
snprintf(msg, sizeof(msg), "File '%s' not found", url);
http_log("File '%s' not found\n", url);
goto send_error;
}
c->stream = stream;
memcpy(c->feed_streams, stream->feed_streams, sizeof(c->feed_streams));
memset(c->switch_feed_streams, -1, sizeof(c->switch_feed_streams));
if (stream->stream_type == STREAM_TYPE_REDIRECT) {
c->http_error = 301;
q = c->buffer;
snprintf(q, c->buffer_size,
"HTTP/1.0 301 Moved\r\n"
"Location: %s\r\n"
"Content-type: text/html\r\n"
"\r\n"
"<!DOCTYPE html>\n"
"<html><head><title>Moved</title></head><body>\r\n"
"You should be <a href=\"%s\">redirected</a>.\r\n"
"</body></html>\r\n",
stream->feed_filename, stream->feed_filename);
q += strlen(q);
/* prepare output buffer */
c->buffer_ptr = c->buffer;
c->buffer_end = q;
c->state = HTTPSTATE_SEND_HEADER;
return 0;
}
/* If this is WMP, get the rate information */
if (extract_rates(ratebuf, sizeof(ratebuf), c->buffer)) {
if (modify_current_stream(c, ratebuf)) {
for (i = 0; i < FF_ARRAY_ELEMS(c->feed_streams); i++) {
if (c->switch_feed_streams[i] >= 0)
c->switch_feed_streams[i] = -1;
}
}
}
if (c->post == 0 && stream->stream_type == STREAM_TYPE_LIVE)
current_bandwidth += stream->bandwidth;
/* If already streaming this feed, do not let another feeder start */
if (stream->feed_opened) {
snprintf(msg, sizeof(msg), "This feed is already being received.");
http_log("Feed '%s' already being received\n", stream->feed_filename);
goto send_error;
}
if (c->post == 0 && config.max_bandwidth < current_bandwidth) {
c->http_error = 503;
q = c->buffer;
snprintf(q, c->buffer_size,
"HTTP/1.0 503 Server too busy\r\n"
"Content-type: text/html\r\n"
"\r\n"
"<!DOCTYPE html>\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 bandwidth being served (including your stream) "
"is %"PRIu64"kbit/s, and this exceeds the limit of "
"%"PRIu64"kbit/s.</p>\r\n"
"</body></html>\r\n",
current_bandwidth, config.max_bandwidth);
q += strlen(q);
/* prepare output buffer */
c->buffer_ptr = c->buffer;
c->buffer_end = q;
c->state = HTTPSTATE_SEND_HEADER;
return 0;
}
if (redir_type != REDIR_NONE) {
const char *hostinfo = 0;
for (p = c->buffer; *p && *p != '\r' && *p != '\n'; ) {
if (av_strncasecmp(p, "Host:", 5) == 0) {
hostinfo = p + 5;
break;
}
p = strchr(p, '\n');
if (!p)
break;
p++;
}
if (hostinfo) {
char *eoh;
char hostbuf[260];
while (av_isspace(*hostinfo))
hostinfo++;
eoh = strchr(hostinfo, '\n');
if (eoh) {
if (eoh[-1] == '\r')
eoh--;
if (eoh - hostinfo < sizeof(hostbuf) - 1) {
memcpy(hostbuf, hostinfo, eoh - hostinfo);
hostbuf[eoh - hostinfo] = 0;
c->http_error = 200;
q = c->buffer;
switch(redir_type) {
case REDIR_ASX:
snprintf(q, c->buffer_size,
"HTTP/1.0 200 ASX Follows\r\n"
"Content-type: video/x-ms-asf\r\n"
"\r\n"
"<ASX Version=\"3\">\r\n"
//"<!-- Autogenerated by ffserver -->\r\n"
"<ENTRY><REF HREF=\"http://%s/%s%s\"/></ENTRY>\r\n"
"</ASX>\r\n", hostbuf, filename, info);
q += strlen(q);
break;
case REDIR_RAM:
snprintf(q, c->buffer_size,
"HTTP/1.0 200 RAM Follows\r\n"
"Content-type: audio/x-pn-realaudio\r\n"
"\r\n"
"# Autogenerated by ffserver\r\n"
"http://%s/%s%s\r\n", hostbuf, filename, info);
q += strlen(q);
break;
case REDIR_ASF:
snprintf(q, c->buffer_size,
"HTTP/1.0 200 ASF Redirect follows\r\n"
"Content-type: video/x-ms-asf\r\n"
"\r\n"
"[Reference]\r\n"
"Ref1=http://%s/%s%s\r\n", hostbuf, filename, info);
q += strlen(q);
break;
case REDIR_RTSP:
{
char hostname[256], *p;
/* extract only hostname */
av_strlcpy(hostname, hostbuf, sizeof(hostname));
p = strrchr(hostname, ':');
if (p)
*p = '\0';
snprintf(q, c->buffer_size,
"HTTP/1.0 200 RTSP Redirect follows\r\n"
/* XXX: incorrect MIME type ? */
"Content-type: application/x-rtsp\r\n"
"\r\n"
"rtsp://%s:%d/%s\r\n", hostname, ntohs(config.rtsp_addr.sin_port), filename);
q += strlen(q);
}
break;
case REDIR_SDP:
{
uint8_t *sdp_data;
int sdp_data_size;
socklen_t len;
struct sockaddr_in my_addr;
snprintf(q, c->buffer_size,
"HTTP/1.0 200 OK\r\n"
"Content-type: application/sdp\r\n"
"\r\n");
q += strlen(q);
len = sizeof(my_addr);
/* XXX: Should probably fail? */
if (getsockname(c->fd, (struct sockaddr *)&my_addr, &len))
http_log("getsockname() failed\n");
/* XXX: should use a dynamic buffer */
sdp_data_size = prepare_sdp_description(stream,
&sdp_data,
my_addr.sin_addr);
if (sdp_data_size > 0) {
memcpy(q, sdp_data, sdp_data_size);
q += sdp_data_size;
*q = '\0';
av_freep(&sdp_data);
}
}
break;
default:
abort();
break;
}
/* prepare output buffer */
c->buffer_ptr = c->buffer;
c->buffer_end = q;
c->state = HTTPSTATE_SEND_HEADER;
return 0;
}
}
}
snprintf(msg, sizeof(msg), "ASX/RAM file not handled");
goto send_error;
}
stream->conns_served++;
/* XXX: add there authenticate and IP match */
if (c->post) {
/* if post, it means a feed is being sent */
if (!stream->is_feed) {
/* However it might be a status report from WMP! Let us log the
* data as it might come handy one day. */
const char *logline = 0;
int client_id = 0;
for (p = c->buffer; *p && *p != '\r' && *p != '\n'; ) {
if (av_strncasecmp(p, "Pragma: log-line=", 17) == 0) {
logline = p;
break;
}
if (av_strncasecmp(p, "Pragma: client-id=", 18) == 0)
client_id = strtol(p + 18, 0, 10);
p = strchr(p, '\n');
if (!p)
break;
p++;
}
if (logline) {
char *eol = strchr(logline, '\n');
logline += 17;
if (eol) {
if (eol[-1] == '\r')
eol--;
http_log("%.*s\n", (int) (eol - logline), logline);
c->suppress_log = 1;
}
}
#ifdef DEBUG
http_log("\nGot request:\n%s\n", c->buffer);
#endif
if (client_id && extract_rates(ratebuf, sizeof(ratebuf), c->buffer)) {
HTTPContext *wmpc;
/* Now we have to find the client_id */
for (wmpc = first_http_ctx; wmpc; wmpc = wmpc->next) {
if (wmpc->wmp_client_id == client_id)
break;
}
if (wmpc && modify_current_stream(wmpc, ratebuf))
wmpc->switch_pending = 1;
}
snprintf(msg, sizeof(msg), "POST command not handled");
c->stream = 0;
goto send_error;
}
if (http_start_receive_data(c) < 0) {
snprintf(msg, sizeof(msg), "could not open feed");
goto send_error;
}
c->http_error = 0;
c->state = HTTPSTATE_RECEIVE_DATA;
return 0;
}
#ifdef DEBUG
if (strcmp(stream->filename + strlen(stream->filename) - 4, ".asf") == 0)
http_log("\nGot request:\n%s\n", c->buffer);
#endif
if (c->stream->stream_type == STREAM_TYPE_STATUS)
goto send_status;
/* open input stream */
if (open_input_stream(c, info) < 0) {
snprintf(msg, sizeof(msg), "Input stream corresponding to '%s' not found", url);
goto send_error;
}
/* prepare HTTP header */
c->buffer[0] = 0;
av_strlcatf(c->buffer, c->buffer_size, "HTTP/1.0 200 OK\r\n");
mime_type = c->stream->fmt->mime_type;
if (!mime_type)
mime_type = "application/x-octet-stream";
av_strlcatf(c->buffer, c->buffer_size, "Pragma: no-cache\r\n");
/* for asf, we need extra headers */
if (!strcmp(c->stream->fmt->name,"asf_stream")) {
/* Need to allocate a client id */
c->wmp_client_id = av_lfg_get(&random_state);
av_strlcatf(c->buffer, c->buffer_size, "Server: Cougar 4.1.0.3923\r\nCache-Control: no-cache\r\nPragma: client-id=%d\r\nPragma: features=\"broadcast\"\r\n", c->wmp_client_id);
}
av_strlcatf(c->buffer, c->buffer_size, "Content-Type: %s\r\n", mime_type);
av_strlcatf(c->buffer, c->buffer_size, "\r\n");
q = c->buffer + strlen(c->buffer);
/* prepare output buffer */
c->http_error = 0;
c->buffer_ptr = c->buffer;
c->buffer_end = q;
c->state = HTTPSTATE_SEND_HEADER;
return 0;
send_error:
c->http_error = 404;
q = c->buffer;
if (!htmlencode(msg, &encoded_msg)) {
http_log("Could not encode filename '%s' as HTML\n", msg);
}
snprintf(q, c->buffer_size,
"HTTP/1.0 404 Not Found\r\n"
"Content-type: text/html\r\n"
"\r\n"
"<!DOCTYPE html>\n"
"<html>\n"
"<head>\n"
"<meta charset=\"UTF-8\">\n"
"<title>404 Not Found</title>\n"
"</head>\n"
"<body>%s</body>\n"
"</html>\n", encoded_msg? encoded_msg : "File not found");
q += strlen(q);
/* prepare output buffer */
c->buffer_ptr = c->buffer;
c->buffer_end = q;
c->state = HTTPSTATE_SEND_HEADER;
av_freep(&encoded_msg);
return 0;
send_status:
compute_status(c);
/* horrible: we use this value to avoid
* going to the send data state */
c->http_error = 200;
c->state = HTTPSTATE_SEND_HEADER;
return 0;
}
static void fmt_bytecount(AVIOContext *pb, int64_t count)
{
static const char suffix[] = " kMGTP";
const char *s;
for (s = suffix; count >= 100000 && s[1]; count /= 1000, s++);
avio_printf(pb, "%"PRId64"%c", count, *s);
}
static inline void print_stream_params(AVIOContext *pb, FFServerStream *stream)
{
int i, stream_no;
const char *type = "unknown";
char parameters[64];
LayeredAVStream *st;
AVCodec *codec;
stream_no = stream->nb_streams;
avio_printf(pb, "<table><tr><th>Stream<th>"
"type<th>kbit/s<th>codec<th>"
"Parameters\n");
for (i = 0; i < stream_no; i++) {
st = stream->streams[i];
codec = avcodec_find_encoder(st->codecpar->codec_id);
parameters[0] = 0;
switch(st->codecpar->codec_type) {
case AVMEDIA_TYPE_AUDIO:
type = "audio";
snprintf(parameters, sizeof(parameters), "%d channel(s), %d Hz",
st->codecpar->channels, st->codecpar->sample_rate);
break;
case AVMEDIA_TYPE_VIDEO:
type = "video";
snprintf(parameters, sizeof(parameters),
"%dx%d, q=%d-%d, fps=%d", st->codecpar->width,
st->codecpar->height, st->codec->qmin, st->codec->qmax,
st->time_base.den / st->time_base.num);
break;
default:
abort();
}
avio_printf(pb, "<tr><td>%d<td>%s<td>%"PRId64
"<td>%s<td>%s\n",
i, type, (int64_t)st->codecpar->bit_rate/1000,
codec ? codec->name : "", parameters);
}
avio_printf(pb, "</table>\n");
}
static void clean_html(char *clean, int clean_len, char *dirty)
{
int i, o;
for (o = i = 0; o+10 < clean_len && dirty[i];) {
int len = strspn(dirty+i, "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ$-_.+!*(),?/ :;%");
if (len) {
if (o + len >= clean_len)
break;
memcpy(clean + o, dirty + i, len);
i += len;
o += len;
} else {
int c = dirty[i++];
switch (c) {
case '&': av_strlcat(clean+o, "&amp;" , clean_len - o); break;
case '<': av_strlcat(clean+o, "&lt;" , clean_len - o); break;
case '>': av_strlcat(clean+o, "&gt;" , clean_len - o); break;
case '\'': av_strlcat(clean+o, "&apos;" , clean_len - o); break;
case '\"': av_strlcat(clean+o, "&quot;" , clean_len - o); break;
default: av_strlcat(clean+o, "&#9785;", clean_len - o); break;
}
o += strlen(clean+o);
}
}
clean[o] = 0;
}
static void compute_status(HTTPContext *c)
{
HTTPContext *c1;
FFServerStream *stream;
char *p;
time_t ti;
int i, len;
AVIOContext *pb;
if (avio_open_dyn_buf(&pb) < 0) {
/* XXX: return an error ? */
c->buffer_ptr = c->buffer;
c->buffer_end = c->buffer;
return;
}
avio_printf(pb, "HTTP/1.0 200 OK\r\n");
avio_printf(pb, "Content-type: text/html\r\n");
avio_printf(pb, "Pragma: no-cache\r\n");
avio_printf(pb, "\r\n");
avio_printf(pb, "<!DOCTYPE html>\n");
avio_printf(pb, "<html><head><title>%s Status</title>\n", program_name);
if (c->stream->feed_filename[0])
avio_printf(pb, "<link rel=\"shortcut icon\" href=\"%s\">\n",
c->stream->feed_filename);
avio_printf(pb, "</head>\n<body>");
avio_printf(pb, "<h1>%s Status</h1>\n", program_name);
/* format status */
avio_printf(pb, "<h2>Available Streams</h2>\n");
avio_printf(pb, "<table>\n");
avio_printf(pb, "<tr><th>Path<th>Served<br>Conns<th><br>bytes<th>Format<th>Bit rate<br>kbit/s<th>Video<br>kbit/s<th><br>Codec<th>Audio<br>kbit/s<th><br>Codec<th>Feed\n");
stream = config.first_stream;
while (stream) {
char sfilename[1024];
char *eosf;
if (stream->feed == stream) {
stream = stream->next;
continue;
}
av_strlcpy(sfilename, stream->filename, sizeof(sfilename) - 10);
eosf = sfilename + strlen(sfilename);
if (eosf - sfilename >= 4) {
if (strcmp(eosf - 4, ".asf") == 0)
strcpy(eosf - 4, ".asx");
else if (strcmp(eosf - 3, ".rm") == 0)
strcpy(eosf - 3, ".ram");
else if (stream->fmt && !strcmp(stream->fmt->name, "rtp")) {
/* generate a sample RTSP director if
* unicast. Generate an SDP redirector if
* multicast */
eosf = strrchr(sfilename, '.');
if (!eosf)
eosf = sfilename + strlen(sfilename);
if (stream->is_multicast)
strcpy(eosf, ".sdp");
else
strcpy(eosf, ".rtsp");
}
}
avio_printf(pb, "<tr><td><a href=\"/%s\">%s</a> ",
sfilename, stream->filename);
avio_printf(pb, "<td> %d <td> ",
stream->conns_served);
// TODO: Investigate if we can make http bitexact so it always produces the same count of bytes
if (!config.bitexact)
fmt_bytecount(pb, stream->bytes_served);
switch(stream->stream_type) {
case STREAM_TYPE_LIVE: {
int audio_bit_rate = 0;
int video_bit_rate = 0;
const char *audio_codec_name = "";
const char *video_codec_name = "";
const char *audio_codec_name_extra = "";
const char *video_codec_name_extra = "";
for(i=0;i<stream->nb_streams;i++) {
LayeredAVStream *st = stream->streams[i];
AVCodec *codec = avcodec_find_encoder(st->codecpar->codec_id);
switch(st->codecpar->codec_type) {
case AVMEDIA_TYPE_AUDIO:
audio_bit_rate += st->codecpar->bit_rate;
if (codec) {
if (*audio_codec_name)
audio_codec_name_extra = "...";
audio_codec_name = codec->name;
}
break;
case AVMEDIA_TYPE_VIDEO:
video_bit_rate += st->codecpar->bit_rate;
if (codec) {
if (*video_codec_name)
video_codec_name_extra = "...";
video_codec_name = codec->name;
}
break;
case AVMEDIA_TYPE_DATA:
video_bit_rate += st->codecpar->bit_rate;
break;
default:
abort();
}
}
avio_printf(pb, "<td> %s <td> %d <td> %d <td> %s %s <td> "
"%d <td> %s %s",
stream->fmt->name, stream->bandwidth,
video_bit_rate / 1000, video_codec_name,
video_codec_name_extra, audio_bit_rate / 1000,
audio_codec_name, audio_codec_name_extra);
if (stream->feed)
avio_printf(pb, "<td>%s", stream->feed->filename);
else
avio_printf(pb, "<td>%s", stream->feed_filename);
avio_printf(pb, "\n");
}
break;
default:
avio_printf(pb, "<td> - <td> - "
"<td> - <td><td> - <td>\n");
break;
}
stream = stream->next;
}
avio_printf(pb, "</table>\n");
stream = config.first_stream;
while (stream) {
if (stream->feed != stream) {
stream = stream->next;
continue;
}
avio_printf(pb, "<h2>Feed %s</h2>", stream->filename);
if (stream->pid) {
avio_printf(pb, "Running as pid %"PRId64".\n", (int64_t) stream->pid);
#if defined(linux)
{
FILE *pid_stat;
char ps_cmd[64];
/* This is somewhat linux specific I guess */
snprintf(ps_cmd, sizeof(ps_cmd),
"ps -o \"%%cpu,cputime\" --no-headers %"PRId64"",
(int64_t) stream->pid);
pid_stat = popen(ps_cmd, "r");
if (pid_stat) {
char cpuperc[10];
char cpuused[64];
if (fscanf(pid_stat, "%9s %63s", cpuperc, cpuused) == 2) {
avio_printf(pb, "Currently using %s%% of the cpu. "
"Total time used %s.\n",
cpuperc, cpuused);
}
fclose(pid_stat);
}
}
#endif
avio_printf(pb, "<p>");
}
print_stream_params(pb, stream);
stream = stream->next;
}
/* connection status */
avio_printf(pb, "<h2>Connection Status</h2>\n");
avio_printf(pb, "Number of connections: %d / %d<br>\n",
nb_connections, config.nb_max_connections);
avio_printf(pb, "Bandwidth in use: %"PRIu64"k / %"PRIu64"k<br>\n",
current_bandwidth, config.max_bandwidth);
avio_printf(pb, "<table>\n");
avio_printf(pb, "<tr><th>#<th>File<th>IP<th>URL<th>Proto<th>State<th>Target "
"bit/s<th>Actual bit/s<th>Bytes transferred\n");
c1 = first_http_ctx;
i = 0;
while (c1) {
int bitrate;
int j;
bitrate = 0;
if (c1->stream) {
for (j = 0; j < c1->stream->nb_streams; j++) {
if (!c1->stream->feed)
bitrate += c1->stream->streams[j]->codecpar->bit_rate;
else if (c1->feed_streams[j] >= 0)
bitrate += c1->stream->feed->streams[c1->feed_streams[j]]->codecpar->bit_rate;
}
}
i++;
p = inet_ntoa(c1->from_addr.sin_addr);
clean_html(c1->clean_url, sizeof(c1->clean_url), c1->url);
avio_printf(pb, "<tr><td><b>%d</b><td>%s%s<td>%s<td>%s<td>%s<td>%s"
"<td>",
i, c1->stream ? c1->stream->filename : "",
c1->state == HTTPSTATE_RECEIVE_DATA ? "(input)" : "",
p,
c1->clean_url,
c1->protocol, http_state[c1->state]);
fmt_bytecount(pb, bitrate);
avio_printf(pb, "<td>");
fmt_bytecount(pb, compute_datarate(&c1->datarate, c1->data_count) * 8);
avio_printf(pb, "<td>");
fmt_bytecount(pb, c1->data_count);
avio_printf(pb, "\n");
c1 = c1->next;
}
avio_printf(pb, "</table>\n");
if (!config.bitexact) {
/* date */
ti = time(NULL);
p = ctime(&ti);
avio_printf(pb, "<hr>Generated at %s", p);
}
avio_printf(pb, "</body>\n</html>\n");
len = avio_close_dyn_buf(pb, &c->pb_buffer);
c->buffer_ptr = c->pb_buffer;
c->buffer_end = c->pb_buffer + len;
}
static int open_input_stream(HTTPContext *c, const char *info)
{
char buf[128];
char input_filename[1024];
AVFormatContext *s = NULL;
int buf_size, i, ret;
int64_t stream_pos;
/* find file name */
if (c->stream->feed) {
strcpy(input_filename, c->stream->feed->feed_filename);
buf_size = FFM_PACKET_SIZE;
/* compute position (absolute time) */
if (av_find_info_tag(buf, sizeof(buf), "date", info)) {
if ((ret = av_parse_time(&stream_pos, buf, 0)) < 0) {
http_log("Invalid date specification '%s' for stream\n", buf);
return ret;
}
} else if (av_find_info_tag(buf, sizeof(buf), "buffer", info)) {
int prebuffer = strtol(buf, 0, 10);
stream_pos = av_gettime() - prebuffer * (int64_t)1000000;
} else
stream_pos = av_gettime() - c->stream->prebuffer * (int64_t)1000;
} else {
strcpy(input_filename, c->stream->feed_filename);
buf_size = 0;
/* compute position (relative time) */
if (av_find_info_tag(buf, sizeof(buf), "date", info)) {
if ((ret = av_parse_time(&stream_pos, buf, 1)) < 0) {
http_log("Invalid date specification '%s' for stream\n", buf);
return ret;
}
} else
stream_pos = 0;
}
if (!input_filename[0]) {
http_log("No filename was specified for stream\n");
return AVERROR(EINVAL);
}
/* open stream */
ret = avformat_open_input(&s, input_filename, c->stream->ifmt,
&c->stream->in_opts);
if (ret < 0) {
http_log("Could not open input '%s': %s\n",
input_filename, av_err2str(ret));
return ret;
}
/* set buffer size */
if (buf_size > 0) {
ret = ffio_set_buf_size(s->pb, buf_size);
if (ret < 0) {
http_log("Failed to set buffer size\n");
return ret;
}
}
s->flags |= AVFMT_FLAG_GENPTS;
c->fmt_in = s;
if (strcmp(s->iformat->name, "ffm") &&
(ret = avformat_find_stream_info(c->fmt_in, NULL)) < 0) {
http_log("Could not find stream info for input '%s'\n", input_filename);
avformat_close_input(&s);
return ret;
}
/* choose stream as clock source (we favor the video stream if
* present) for packet sending */
c->pts_stream_index = 0;
for(i=0;i<c->stream->nb_streams;i++) {
if (c->pts_stream_index == 0 &&
c->stream->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
c->pts_stream_index = i;
}
}
if (c->fmt_in->iformat->read_seek)
av_seek_frame(c->fmt_in, -1, stream_pos, 0);
/* set the start time (needed for maxtime and RTP packet timing) */
c->start_time = cur_time;
c->first_pts = AV_NOPTS_VALUE;
return 0;
}
/* return the server clock (in us) */
static int64_t get_server_clock(HTTPContext *c)
{
/* compute current pts value from system time */
return (cur_time - c->start_time) * 1000;
}
/* return the estimated time (in us) at which the current packet must be sent */
static int64_t get_packet_send_clock(HTTPContext *c)
{
int bytes_left, bytes_sent, frame_bytes;
frame_bytes = c->cur_frame_bytes;
if (frame_bytes <= 0)
return c->cur_pts;
bytes_left = c->buffer_end - c->buffer_ptr;
bytes_sent = frame_bytes - bytes_left;
return c->cur_pts + (c->cur_frame_duration * bytes_sent) / frame_bytes;
}
static int http_prepare_data(HTTPContext *c)
{
int i, len, ret;
AVFormatContext *ctx;
av_freep(&c->pb_buffer);
switch(c->state) {
case HTTPSTATE_SEND_DATA_HEADER:
ctx = avformat_alloc_context();
if (!ctx)
return AVERROR(ENOMEM);
c->pfmt_ctx = ctx;
av_dict_copy(&(c->pfmt_ctx->metadata), c->stream->metadata, 0);
for(i=0;i<c->stream->nb_streams;i++) {
LayeredAVStream *src;
AVStream *st = avformat_new_stream(c->pfmt_ctx, NULL);
if (!st)
return AVERROR(ENOMEM);
/* if file or feed, then just take streams from FFServerStream
* struct */
if (!c->stream->feed ||
c->stream->feed == c->stream)
src = c->stream->streams[i];
else
src = c->stream->feed->streams[c->stream->feed_streams[i]];
unlayer_stream(c->pfmt_ctx->streams[i], src); //TODO we no longer copy st->internal, does this matter?
av_assert0(!c->pfmt_ctx->streams[i]->priv_data);
if (src->codec->flags & AV_CODEC_FLAG_BITEXACT)
c->pfmt_ctx->flags |= AVFMT_FLAG_BITEXACT;
}
/* set output format parameters */
c->pfmt_ctx->oformat = c->stream->fmt;
av_assert0(c->pfmt_ctx->nb_streams == c->stream->nb_streams);
c->got_key_frame = 0;
/* prepare header and save header data in a stream */
if (avio_open_dyn_buf(&c->pfmt_ctx->pb) < 0) {
/* XXX: potential leak */
return -1;
}
c->pfmt_ctx->pb->seekable = 0;
/*
* HACK to avoid MPEG-PS muxer to spit many underflow errors
* Default value from FFmpeg
* Try to set it using configuration option
*/
c->pfmt_ctx->max_delay = (int)(0.7*AV_TIME_BASE);
if ((ret = avformat_write_header(c->pfmt_ctx, NULL)) < 0) {
http_log("Error writing output header for stream '%s': %s\n",
c->stream->filename, av_err2str(ret));
return ret;
}
av_dict_free(&c->pfmt_ctx->metadata);
len = avio_close_dyn_buf(c->pfmt_ctx->pb, &c->pb_buffer);
c->buffer_ptr = c->pb_buffer;
c->buffer_end = c->pb_buffer + len;
c->state = HTTPSTATE_SEND_DATA;
c->last_packet_sent = 0;
break;
case HTTPSTATE_SEND_DATA:
/* find a new packet */
/* read a packet from the input stream */
if (c->stream->feed)
ffm_set_write_index(c->fmt_in,
c->stream->feed->feed_write_index,
c->stream->feed->feed_size);
if (c->stream->max_time &&
c->stream->max_time + c->start_time - cur_time < 0)
/* We have timed out */
c->state = HTTPSTATE_SEND_DATA_TRAILER;
else {
AVPacket pkt;
redo:
ret = av_read_frame(c->fmt_in, &pkt);
if (ret < 0) {
if (c->stream->feed) {
/* if coming from feed, it means we reached the end of the
* ffm file, so must wait for more data */
c->state = HTTPSTATE_WAIT_FEED;
return 1; /* state changed */
}
if (ret == AVERROR(EAGAIN)) {
/* input not ready, come back later */
return 0;
}
if (c->stream->loop) {
avformat_close_input(&c->fmt_in);
if (open_input_stream(c, "") < 0)
goto no_loop;
goto redo;
} else {
no_loop:
/* must send trailer now because EOF or error */
c->state = HTTPSTATE_SEND_DATA_TRAILER;
}
} else {
int source_index = pkt.stream_index;
/* update first pts if needed */
if (c->first_pts == AV_NOPTS_VALUE && pkt.dts != AV_NOPTS_VALUE) {
c->first_pts = av_rescale_q(pkt.dts, c->fmt_in->streams[pkt.stream_index]->time_base, AV_TIME_BASE_Q);
c->start_time = cur_time;
}
/* send it to the appropriate stream */
if (c->stream->feed) {
/* if coming from a feed, select the right stream */
if (c->switch_pending) {
c->switch_pending = 0;
for(i=0;i<c->stream->nb_streams;i++) {
if (c->switch_feed_streams[i] == pkt.stream_index)
if (pkt.flags & AV_PKT_FLAG_KEY)
c->switch_feed_streams[i] = -1;
if (c->switch_feed_streams[i] >= 0)
c->switch_pending = 1;
}
}
for(i=0;i<c->stream->nb_streams;i++) {
if (c->stream->feed_streams[i] == pkt.stream_index) {
AVStream *st = c->fmt_in->streams[source_index];
pkt.stream_index = i;
if (pkt.flags & AV_PKT_FLAG_KEY &&
(st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ||
c->stream->nb_streams == 1))
c->got_key_frame = 1;
if (!c->stream->send_on_key || c->got_key_frame)
goto send_it;
}
}
} else {
AVStream *ist, *ost;
send_it:
ist = c->fmt_in->streams[source_index];
/* specific handling for RTP: we use several
* output streams (one for each RTP connection).
* XXX: need more abstract handling */
if (c->is_packetized) {
/* compute send time and duration */
if (pkt.dts != AV_NOPTS_VALUE) {
c->cur_pts = av_rescale_q(pkt.dts, ist->time_base, AV_TIME_BASE_Q);
c->cur_pts -= c->first_pts;
}
c->cur_frame_duration = av_rescale_q(pkt.duration, ist->time_base, AV_TIME_BASE_Q);
/* find RTP context */
c->packet_stream_index = pkt.stream_index;
ctx = c->rtp_ctx[c->packet_stream_index];
if(!ctx) {
av_packet_unref(&pkt);
break;
}
/* only one stream per RTP connection */
pkt.stream_index = 0;
} else {
ctx = c->pfmt_ctx;
/* Fudge here */
}
if (c->is_packetized) {
int max_packet_size;
if (c->rtp_protocol == RTSP_LOWER_TRANSPORT_TCP)
max_packet_size = RTSP_TCP_MAX_PACKET_SIZE;
else
max_packet_size = c->rtp_handles[c->packet_stream_index]->max_packet_size;
ret = ffio_open_dyn_packet_buf(&ctx->pb,
max_packet_size);
} else
ret = avio_open_dyn_buf(&ctx->pb);
if (ret < 0) {
/* XXX: potential leak */
return -1;
}
ost = ctx->streams[pkt.stream_index];
ctx->pb->seekable = 0;
if (pkt.dts != AV_NOPTS_VALUE)
pkt.dts = av_rescale_q(pkt.dts, ist->time_base,
ost->time_base);
if (pkt.pts != AV_NOPTS_VALUE)
pkt.pts = av_rescale_q(pkt.pts, ist->time_base,
ost->time_base);
pkt.duration = av_rescale_q(pkt.duration, ist->time_base,
ost->time_base);
if ((ret = av_write_frame(ctx, &pkt)) < 0) {
http_log("Error writing frame to output for stream '%s': %s\n",
c->stream->filename, av_err2str(ret));
c->state = HTTPSTATE_SEND_DATA_TRAILER;
}
av_freep(&c->pb_buffer);
len = avio_close_dyn_buf(ctx->pb, &c->pb_buffer);
ctx->pb = NULL;
c->cur_frame_bytes = len;
c->buffer_ptr = c->pb_buffer;
c->buffer_end = c->pb_buffer + len;
if (len == 0) {
av_packet_unref(&pkt);
goto redo;
}
}
av_packet_unref(&pkt);
}
}
break;
default:
case HTTPSTATE_SEND_DATA_TRAILER:
/* last packet test ? */
if (c->last_packet_sent || c->is_packetized)
return -1;
ctx = c->pfmt_ctx;
/* prepare header */
if (avio_open_dyn_buf(&ctx->pb) < 0) {
/* XXX: potential leak */
return -1;
}
c->pfmt_ctx->pb->seekable = 0;
av_write_trailer(ctx);
len = avio_close_dyn_buf(ctx->pb, &c->pb_buffer);
c->buffer_ptr = c->pb_buffer;
c->buffer_end = c->pb_buffer + len;
c->last_packet_sent = 1;
break;
}
return 0;
}
/* should convert the format at the same time */
/* send data starting at c->buffer_ptr to the output connection
* (either UDP or TCP)
*/
static int http_send_data(HTTPContext *c)
{
int len, ret;
for(;;) {
if (c->buffer_ptr >= c->buffer_end) {
ret = http_prepare_data(c);
if (ret < 0)
return -1;
else if (ret)
/* state change requested */
break;
} else {
if (c->is_packetized) {
/* RTP data output */
len = c->buffer_end - c->buffer_ptr;
if (len < 4) {
/* fail safe - should never happen */
fail1:
c->buffer_ptr = c->buffer_end;
return 0;
}
len = (c->buffer_ptr[0] << 24) |
(c->buffer_ptr[1] << 16) |
(c->buffer_ptr[2] << 8) |
(c->buffer_ptr[3]);
if (len > (c->buffer_end - c->buffer_ptr))
goto fail1;
if ((get_packet_send_clock(c) - get_server_clock(c)) > 0) {
/* nothing to send yet: we can wait */
return 0;
}
c->data_count += len;
update_datarate(&c->datarate, c->data_count);
if (c->stream)
c->stream->bytes_served += len;
if (c->rtp_protocol == RTSP_LOWER_TRANSPORT_TCP) {
/* RTP packets are sent inside the RTSP TCP connection */
AVIOContext *pb;
int interleaved_index, size;
uint8_t header[4];
HTTPContext *rtsp_c;
rtsp_c = c->rtsp_c;
/* if no RTSP connection left, error */
if (!rtsp_c)
return -1;
/* if already sending something, then wait. */
if (rtsp_c->state != RTSPSTATE_WAIT_REQUEST)
break;
if (avio_open_dyn_buf(&pb) < 0)
goto fail1;
interleaved_index = c->packet_stream_index * 2;
/* RTCP packets are sent at odd indexes */
if (c->buffer_ptr[1] == 200)
interleaved_index++;
/* write RTSP TCP header */
header[0] = '$';
header[1] = interleaved_index;
header[2] = len >> 8;
header[3] = len;
avio_write(pb, header, 4);
/* write RTP packet data */
c->buffer_ptr += 4;
avio_write(pb, c->buffer_ptr, len);
size = avio_close_dyn_buf(pb, &c->packet_buffer);
/* prepare asynchronous TCP sending */
rtsp_c->packet_buffer_ptr = c->packet_buffer;
rtsp_c->packet_buffer_end = c->packet_buffer + size;
c->buffer_ptr += len;
/* send everything we can NOW */
len = send(rtsp_c->fd, rtsp_c->packet_buffer_ptr,
rtsp_c->packet_buffer_end - rtsp_c->packet_buffer_ptr, 0);
if (len > 0)
rtsp_c->packet_buffer_ptr += len;
if (rtsp_c->packet_buffer_ptr < rtsp_c->packet_buffer_end) {
/* if we could not send all the data, we will
* send it later, so a new state is needed to
* "lock" the RTSP TCP connection */
rtsp_c->state = RTSPSTATE_SEND_PACKET;
break;
} else
/* all data has been sent */
av_freep(&c->packet_buffer);
} else {
/* send RTP packet directly in UDP */
c->buffer_ptr += 4;
ffurl_write(c->rtp_handles[c->packet_stream_index],
c->buffer_ptr, len);
c->buffer_ptr += len;
/* here we continue as we can send several packets
* per 10 ms slot */
}
} else {
/* TCP data output */
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 */
return -1;
else
return 0;
}
c->buffer_ptr += len;
c->data_count += len;
update_datarate(&c->datarate, c->data_count);
if (c->stream)
c->stream->bytes_served += len;
break;
}
}
} /* for(;;) */
return 0;
}
static int http_start_receive_data(HTTPContext *c)
{
int fd;
int ret;
int64_t ret64;
if (c->stream->feed_opened) {
http_log("Stream feed '%s' was not opened\n",
c->stream->feed_filename);
return AVERROR(EINVAL);
}
/* Don't permit writing to this one */
if (c->stream->readonly) {
http_log("Cannot write to read-only file '%s'\n",
c->stream->feed_filename);
return AVERROR(EINVAL);
}
/* open feed */
fd = open(c->stream->feed_filename, O_RDWR);
if (fd < 0) {
ret = AVERROR(errno);
http_log("Could not open feed file '%s': %s\n",
c->stream->feed_filename, strerror(errno));
return ret;
}
c->feed_fd = fd;
if (c->stream->truncate) {
/* truncate feed file */
ffm_write_write_index(c->feed_fd, FFM_PACKET_SIZE);
http_log("Truncating feed file '%s'\n", c->stream->feed_filename);
if (ftruncate(c->feed_fd, FFM_PACKET_SIZE) < 0) {
ret = AVERROR(errno);
http_log("Error truncating feed file '%s': %s\n",
c->stream->feed_filename, strerror(errno));
return ret;
}
} else {
ret64 = ffm_read_write_index(fd);
if (ret64 < 0) {
http_log("Error reading write index from feed file '%s': %s\n",
c->stream->feed_filename, strerror(errno));
return ret64;
}
c->stream->feed_write_index = ret64;
}
c->stream->feed_write_index = FFMAX(ffm_read_write_index(fd),
FFM_PACKET_SIZE);
c->stream->feed_size = lseek(fd, 0, SEEK_END);
lseek(fd, 0, SEEK_SET);
/* init buffer input */
c->buffer_ptr = c->buffer;
c->buffer_end = c->buffer + FFM_PACKET_SIZE;
c->stream->feed_opened = 1;
c->chunked_encoding = !!av_stristr(c->buffer, "Transfer-Encoding: chunked");
return 0;
}
static int http_receive_data(HTTPContext *c)
{
HTTPContext *c1;
int len, loop_run = 0;
while (c->chunked_encoding && !c->chunk_size &&
c->buffer_end > c->buffer_ptr) {
/* read chunk header, if present */
len = recv(c->fd, c->buffer_ptr, 1, 0);
if (len < 0) {
if (ff_neterrno() != AVERROR(EAGAIN) &&
ff_neterrno() != AVERROR(EINTR))
/* error : close connection */
goto fail;
return 0;
} else if (len == 0) {
/* end of connection : close it */
goto fail;
} else if (c->buffer_ptr - c->buffer >= 2 &&
!memcmp(c->buffer_ptr - 1, "\r\n", 2)) {
c->chunk_size = strtol(c->buffer, 0, 16);
if (c->chunk_size <= 0) { // end of stream or invalid chunk size
c->chunk_size = 0;
goto fail;
}
c->buffer_ptr = c->buffer;
break;
} else if (++loop_run > 10)
/* no chunk header, abort */
goto fail;
else
c->buffer_ptr++;
}
if (c->buffer_end > c->buffer_ptr) {
len = recv(c->fd, c->buffer_ptr,
FFMIN(c->chunk_size, c->buffer_end - c->buffer_ptr), 0);
if (len < 0) {
if (ff_neterrno() != AVERROR(EAGAIN) &&
ff_neterrno() != AVERROR(EINTR))
/* error : close connection */
goto fail;
} else if (len == 0)
/* end of connection : close it */
goto fail;
else {
av_assert0(len <= c->chunk_size);
c->chunk_size -= len;
c->buffer_ptr += len;
c->data_count += len;
update_datarate(&c->datarate, c->data_count);
}
}
if (c->buffer_ptr - c->buffer >= 2 && c->data_count > FFM_PACKET_SIZE) {
if (c->buffer[0] != 'f' ||
c->buffer[1] != 'm') {
http_log("Feed stream has become desynchronized -- disconnecting\n");
goto fail;
}
}
if (c->buffer_ptr >= c->buffer_end) {
FFServerStream *feed = c->stream;
/* a packet has been received : write it in the store, except
* if header */
if (c->data_count > FFM_PACKET_SIZE) {
/* XXX: use llseek or url_seek
* XXX: Should probably fail? */
if (lseek(c->feed_fd, feed->feed_write_index, SEEK_SET) == -1)
http_log("Seek to %"PRId64" failed\n", feed->feed_write_index);
if (write(c->feed_fd, c->buffer, FFM_PACKET_SIZE) < 0) {
http_log("Error writing to feed file: %s\n", strerror(errno));
goto fail;
}
feed->feed_write_index += FFM_PACKET_SIZE;
/* update file size */
if (feed->feed_write_index > c->stream->feed_size)
feed->feed_size = feed->feed_write_index;
/* handle wrap around if max file size reached */
if (c->stream->feed_max_size &&
feed->feed_write_index >= c->stream->feed_max_size)
feed->feed_write_index = FFM_PACKET_SIZE;
/* write index */
if (ffm_write_write_index(c->feed_fd, feed->feed_write_index) < 0) {
http_log("Error writing index to feed file: %s\n",
strerror(errno));
goto fail;
}
/* wake up any waiting connections */
for(c1 = first_http_ctx; c1; c1 = c1->next) {
if (c1->state == HTTPSTATE_WAIT_FEED &&
c1->stream->feed == c->stream->feed)
c1->state = HTTPSTATE_SEND_DATA;
}
} else {
/* We have a header in our hands that contains useful data */
AVFormatContext *s = avformat_alloc_context();
AVIOContext *pb;
AVInputFormat *fmt_in;
int i;
if (!s)
goto fail;
/* use feed output format name to find corresponding input format */
fmt_in = av_find_input_format(feed->fmt->name);
if (!fmt_in)
goto fail;
pb = avio_alloc_context(c->buffer, c->buffer_end - c->buffer,
0, NULL, NULL, NULL, NULL);
if (!pb)
goto fail;
pb->seekable = 0;
s->pb = pb;
if (avformat_open_input(&s, c->stream->feed_filename, fmt_in, NULL) < 0) {
av_freep(&pb);
goto fail;
}
/* Now we have the actual streams */
if (s->nb_streams != feed->nb_streams) {
avformat_close_input(&s);
av_freep(&pb);
http_log("Feed '%s' stream number does not match registered feed\n",
c->stream->feed_filename);
goto fail;
}
for (i = 0; i < s->nb_streams; i++) {
LayeredAVStream *fst = feed->streams[i];
AVStream *st = s->streams[i];
avcodec_parameters_to_context(fst->codec, st->codecpar);
avcodec_parameters_from_context(fst->codecpar, fst->codec);
}
avformat_close_input(&s);
av_freep(&pb);
}
c->buffer_ptr = c->buffer;
}
return 0;
fail:
c->stream->feed_opened = 0;
close(c->feed_fd);
/* wake up any waiting connections to stop waiting for feed */
for(c1 = first_http_ctx; c1; c1 = c1->next) {
if (c1->state == HTTPSTATE_WAIT_FEED &&
c1->stream->feed == c->stream->feed)
c1->state = HTTPSTATE_SEND_DATA_TRAILER;
}
return -1;
}
/********************************************************************/
/* RTSP handling */
static void rtsp_reply_header(HTTPContext *c, enum RTSPStatusCode error_number)
{
const char *str;
time_t ti;
struct tm *tm;
char buf2[32];
str = RTSP_STATUS_CODE2STRING(error_number);
if (!str)
str = "Unknown Error";
avio_printf(c->pb, "RTSP/1.0 %d %s\r\n", error_number, str);
avio_printf(c->pb, "CSeq: %d\r\n", c->seq);
/* output GMT time */
ti = time(NULL);
tm = gmtime(&ti);
strftime(buf2, sizeof(buf2), "%a, %d %b %Y %H:%M:%S", tm);
avio_printf(c->pb, "Date: %s GMT\r\n", buf2);
}
static void rtsp_reply_error(HTTPContext *c, enum RTSPStatusCode error_number)
{
rtsp_reply_header(c, error_number);
avio_printf(c->pb, "\r\n");
}
static int rtsp_parse_request(HTTPContext *c)
{
const char *p, *p1, *p2;
char cmd[32];
char url[1024];
char protocol[32];
char line[1024];
int len;
RTSPMessageHeader header1 = { 0 }, *header = &header1;
c->buffer_ptr[0] = '\0';
p = c->buffer;
get_word(cmd, sizeof(cmd), &p);
get_word(url, sizeof(url), &p);
get_word(protocol, sizeof(protocol), &p);
av_strlcpy(c->method, cmd, sizeof(c->method));
av_strlcpy(c->url, url, sizeof(c->url));
av_strlcpy(c->protocol, protocol, sizeof(c->protocol));
if (avio_open_dyn_buf(&c->pb) < 0) {
/* XXX: cannot do more */
c->pb = NULL; /* safety */
return -1;
}
/* check version name */
if (strcmp(protocol, "RTSP/1.0")) {
rtsp_reply_error(c, RTSP_STATUS_VERSION);
goto the_end;
}
/* parse each header line */
/* skip to next line */
while (*p != '\n' && *p != '\0')
p++;
if (*p == '\n')
p++;
while (*p != '\0') {
p1 = memchr(p, '\n', (char *)c->buffer_ptr - p);
if (!p1)
break;
p2 = p1;
if (p2 > p && p2[-1] == '\r')
p2--;
/* skip empty line */
if (p2 == p)
break;
len = p2 - p;
if (len > sizeof(line) - 1)
len = sizeof(line) - 1;
memcpy(line, p, len);
line[len] = '\0';
ff_rtsp_parse_line(NULL, header, line, NULL, NULL);
p = p1 + 1;
}
/* handle sequence number */
c->seq = header->seq;
if (!strcmp(cmd, "DESCRIBE"))
rtsp_cmd_describe(c, url);
else if (!strcmp(cmd, "OPTIONS"))
rtsp_cmd_options(c, url);
else if (!strcmp(cmd, "SETUP"))
rtsp_cmd_setup(c, url, header);
else if (!strcmp(cmd, "PLAY"))
rtsp_cmd_play(c, url, header);
else if (!strcmp(cmd, "PAUSE"))
rtsp_cmd_interrupt(c, url, header, 1);
else if (!strcmp(cmd, "TEARDOWN"))
rtsp_cmd_interrupt(c, url, header, 0);
else
rtsp_reply_error(c, RTSP_STATUS_METHOD);
the_end:
len = avio_close_dyn_buf(c->pb, &c->pb_buffer);
c->pb = NULL; /* safety */
if (len < 0)
/* XXX: cannot do more */
return -1;
c->buffer_ptr = c->pb_buffer;
c->buffer_end = c->pb_buffer + len;
c->state = RTSPSTATE_SEND_REPLY;
return 0;
}
static int prepare_sdp_description(FFServerStream *stream, uint8_t **pbuffer,
struct in_addr my_ip)
{
AVFormatContext *avc;
AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
AVDictionaryEntry *entry = av_dict_get(stream->metadata, "title", NULL, 0);
int i;
*pbuffer = NULL;
avc = avformat_alloc_context();
if (!avc || !rtp_format)
return -1;
avc->oformat = rtp_format;
av_dict_set(&avc->metadata, "title",
entry ? entry->value : "No Title", 0);
if (stream->is_multicast) {
snprintf(avc->filename, 1024, "rtp://%s:%d?multicast=1?ttl=%d",
inet_ntoa(stream->multicast_ip),
stream->multicast_port, stream->multicast_ttl);
} else
snprintf(avc->filename, 1024, "rtp://0.0.0.0");
for(i = 0; i < stream->nb_streams; i++) {
AVStream *st = avformat_new_stream(avc, NULL);
if (!st)
goto sdp_done;
avcodec_parameters_from_context(stream->streams[i]->codecpar, stream->streams[i]->codec);
unlayer_stream(st, stream->streams[i]);
}
#define PBUFFER_SIZE 2048
*pbuffer = av_mallocz(PBUFFER_SIZE);
if (!*pbuffer)
goto sdp_done;
av_sdp_create(&avc, 1, *pbuffer, PBUFFER_SIZE);
sdp_done:
av_freep(&avc->streams);
av_dict_free(&avc->metadata);
av_free(avc);
return *pbuffer ? strlen(*pbuffer) : AVERROR(ENOMEM);
}
static void rtsp_cmd_options(HTTPContext *c, const char *url)
{
/* rtsp_reply_header(c, RTSP_STATUS_OK); */
avio_printf(c->pb, "RTSP/1.0 %d %s\r\n", RTSP_STATUS_OK, "OK");
avio_printf(c->pb, "CSeq: %d\r\n", c->seq);
avio_printf(c->pb, "Public: %s\r\n",
"OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE");
avio_printf(c->pb, "\r\n");
}
static void rtsp_cmd_describe(HTTPContext *c, const char *url)
{
FFServerStream *stream;
char path1[1024];
const char *path;
uint8_t *content;
int content_length;
socklen_t len;
struct sockaddr_in my_addr;
/* find which URL is asked */
av_url_split(NULL, 0, NULL, 0, NULL, 0, NULL, path1, sizeof(path1), url);
path = path1;
if (*path == '/')
path++;
for(stream = config.first_stream; stream; stream = stream->next) {
if (!stream->is_feed &&
stream->fmt && !strcmp(stream->fmt->name, "rtp") &&
!strcmp(path, stream->filename)) {
goto found;
}
}
/* no stream found */
rtsp_reply_error(c, RTSP_STATUS_NOT_FOUND);
return;
found:
/* prepare the media description in SDP format */
/* get the host IP */
len = sizeof(my_addr);
getsockname(c->fd, (struct sockaddr *)&my_addr, &len);
content_length = prepare_sdp_description(stream, &content,
my_addr.sin_addr);
if (content_length < 0) {
rtsp_reply_error(c, RTSP_STATUS_INTERNAL);
return;
}
rtsp_reply_header(c, RTSP_STATUS_OK);
avio_printf(c->pb, "Content-Base: %s/\r\n", url);
avio_printf(c->pb, "Content-Type: application/sdp\r\n");
avio_printf(c->pb, "Content-Length: %d\r\n", content_length);
avio_printf(c->pb, "\r\n");
avio_write(c->pb, content, content_length);
av_free(content);
}
static HTTPContext *find_rtp_session(const char *session_id)
{
HTTPContext *c;
if (session_id[0] == '\0')
return NULL;
for(c = first_http_ctx; c; c = c->next) {
if (!strcmp(c->session_id, session_id))
return c;
}
return NULL;
}
static RTSPTransportField *find_transport(RTSPMessageHeader *h, enum RTSPLowerTransport lower_transport)
{
RTSPTransportField *th;
int i;
for(i=0;i<h->nb_transports;i++) {
th = &h->transports[i];
if (th->lower_transport == lower_transport)
return th;
}
return NULL;
}
static void rtsp_cmd_setup(HTTPContext *c, const char *url,
RTSPMessageHeader *h)
{
FFServerStream *stream;
int stream_index, rtp_port, rtcp_port;
char buf[1024];
char path1[1024];
const char *path;
HTTPContext *rtp_c;
RTSPTransportField *th;
struct sockaddr_in dest_addr;
RTSPActionServerSetup setup;
/* find which URL is asked */
av_url_split(NULL, 0, NULL, 0, NULL, 0, NULL, path1, sizeof(path1), url);
path = path1;
if (*path == '/')
path++;
/* now check each stream */
for(stream = config.first_stream; stream; stream = stream->next) {
if (stream->is_feed || !stream->fmt ||
strcmp(stream->fmt->name, "rtp")) {
continue;
}
/* accept aggregate filenames only if single stream */
if (!strcmp(path, stream->filename)) {
if (stream->nb_streams != 1) {
rtsp_reply_error(c, RTSP_STATUS_AGGREGATE);
return;
}
stream_index = 0;
goto found;
}
for(stream_index = 0; stream_index < stream->nb_streams;
stream_index++) {
snprintf(buf, sizeof(buf), "%s/streamid=%d",
stream->filename, stream_index);
if (!strcmp(path, buf))
goto found;
}
}
/* no stream found */
rtsp_reply_error(c, RTSP_STATUS_SERVICE); /* XXX: right error ? */
return;
found:
/* generate session id if needed */
if (h->session_id[0] == '\0') {
unsigned random0 = av_lfg_get(&random_state);
unsigned random1 = av_lfg_get(&random_state);
snprintf(h->session_id, sizeof(h->session_id), "%08x%08x",
random0, random1);
}
/* find RTP session, and create it if none found */
rtp_c = find_rtp_session(h->session_id);
if (!rtp_c) {
/* always prefer UDP */
th = find_transport(h, RTSP_LOWER_TRANSPORT_UDP);
if (!th) {
th = find_transport(h, RTSP_LOWER_TRANSPORT_TCP);
if (!th) {
rtsp_reply_error(c, RTSP_STATUS_TRANSPORT);
return;
}
}
rtp_c = rtp_new_connection(&c->from_addr, stream, h->session_id,
th->lower_transport);
if (!rtp_c) {
rtsp_reply_error(c, RTSP_STATUS_BANDWIDTH);
return;
}
/* open input stream */
if (open_input_stream(rtp_c, "") < 0) {
rtsp_reply_error(c, RTSP_STATUS_INTERNAL);
return;
}
}
/* test if stream is OK (test needed because several SETUP needs
* to be done for a given file) */
if (rtp_c->stream != stream) {
rtsp_reply_error(c, RTSP_STATUS_SERVICE);
return;
}
/* test if stream is already set up */
if (rtp_c->rtp_ctx[stream_index]) {
rtsp_reply_error(c, RTSP_STATUS_STATE);
return;
}
/* check transport */
th = find_transport(h, rtp_c->rtp_protocol);
if (!th || (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
th->client_port_min <= 0)) {
rtsp_reply_error(c, RTSP_STATUS_TRANSPORT);
return;
}
/* setup default options */
setup.transport_option[0] = '\0';
dest_addr = rtp_c->from_addr;
dest_addr.sin_port = htons(th->client_port_min);
/* setup stream */
if (rtp_new_av_stream(rtp_c, stream_index, &dest_addr, c) < 0) {
rtsp_reply_error(c, RTSP_STATUS_TRANSPORT);
return;
}
/* now everything is OK, so we can send the connection parameters */
rtsp_reply_header(c, RTSP_STATUS_OK);
/* session ID */
avio_printf(c->pb, "Session: %s\r\n", rtp_c->session_id);
switch(rtp_c->rtp_protocol) {
case RTSP_LOWER_TRANSPORT_UDP:
rtp_port = ff_rtp_get_local_rtp_port(rtp_c->rtp_handles[stream_index]);
rtcp_port = ff_rtp_get_local_rtcp_port(rtp_c->rtp_handles[stream_index]);
avio_printf(c->pb, "Transport: RTP/AVP/UDP;unicast;"
"client_port=%d-%d;server_port=%d-%d",
th->client_port_min, th->client_port_max,
rtp_port, rtcp_port);
break;
case RTSP_LOWER_TRANSPORT_TCP:
avio_printf(c->pb, "Transport: RTP/AVP/TCP;interleaved=%d-%d",
stream_index * 2, stream_index * 2 + 1);
break;
default:
break;
}
if (setup.transport_option[0] != '\0')
avio_printf(c->pb, ";%s", setup.transport_option);
avio_printf(c->pb, "\r\n");
avio_printf(c->pb, "\r\n");
}
/**
* find an RTP connection by using the session ID. Check consistency
* with filename
*/
static HTTPContext *find_rtp_session_with_url(const char *url,
const char *session_id)
{
HTTPContext *rtp_c;
char path1[1024];
const char *path;
char buf[1024];
int s, len;
rtp_c = find_rtp_session(session_id);
if (!rtp_c)
return NULL;
/* find which URL is asked */
av_url_split(NULL, 0, NULL, 0, NULL, 0, NULL, path1, sizeof(path1), url);
path = path1;
if (*path == '/')
path++;
if(!strcmp(path, rtp_c->stream->filename)) return rtp_c;
for(s=0; s<rtp_c->stream->nb_streams; ++s) {
snprintf(buf, sizeof(buf), "%s/streamid=%d",
rtp_c->stream->filename, s);
if(!strncmp(path, buf, sizeof(buf)))
/* XXX: Should we reply with RTSP_STATUS_ONLY_AGGREGATE
* if nb_streams>1? */
return rtp_c;
}
len = strlen(path);
if (len > 0 && path[len - 1] == '/' &&
!strncmp(path, rtp_c->stream->filename, len - 1))
return rtp_c;
return NULL;
}
static void rtsp_cmd_play(HTTPContext *c, const char *url, RTSPMessageHeader *h)
{
HTTPContext *rtp_c;
rtp_c = find_rtp_session_with_url(url, h->session_id);
if (!rtp_c) {
rtsp_reply_error(c, RTSP_STATUS_SESSION);
return;
}
if (rtp_c->state != HTTPSTATE_SEND_DATA &&
rtp_c->state != HTTPSTATE_WAIT_FEED &&
rtp_c->state != HTTPSTATE_READY) {
rtsp_reply_error(c, RTSP_STATUS_STATE);
return;
}
rtp_c->state = HTTPSTATE_SEND_DATA;
/* now everything is OK, so we can send the connection parameters */
rtsp_reply_header(c, RTSP_STATUS_OK);
/* session ID */
avio_printf(c->pb, "Session: %s\r\n", rtp_c->session_id);
avio_printf(c->pb, "\r\n");
}
static void rtsp_cmd_interrupt(HTTPContext *c, const char *url,
RTSPMessageHeader *h, int pause_only)
{
HTTPContext *rtp_c;
rtp_c = find_rtp_session_with_url(url, h->session_id);
if (!rtp_c) {
rtsp_reply_error(c, RTSP_STATUS_SESSION);
return;
}
if (pause_only) {
if (rtp_c->state != HTTPSTATE_SEND_DATA &&
rtp_c->state != HTTPSTATE_WAIT_FEED) {
rtsp_reply_error(c, RTSP_STATUS_STATE);
return;
}
rtp_c->state = HTTPSTATE_READY;
rtp_c->first_pts = AV_NOPTS_VALUE;
}
/* now everything is OK, so we can send the connection parameters */
rtsp_reply_header(c, RTSP_STATUS_OK);
/* session ID */
avio_printf(c->pb, "Session: %s\r\n", rtp_c->session_id);
avio_printf(c->pb, "\r\n");
if (!pause_only)
close_connection(rtp_c);
}
/********************************************************************/
/* RTP handling */
static HTTPContext *rtp_new_connection(struct sockaddr_in *from_addr,
FFServerStream *stream,
const char *session_id,
enum RTSPLowerTransport rtp_protocol)
{
HTTPContext *c = NULL;
const char *proto_str;
/* XXX: should output a warning page when coming
* close to the connection limit */
if (nb_connections >= config.nb_max_connections)
goto fail;
/* add a new connection */
c = av_mallocz(sizeof(HTTPContext));
if (!c)
goto fail;
c->fd = -1;
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;
nb_connections++;
c->stream = stream;
av_strlcpy(c->session_id, session_id, sizeof(c->session_id));
c->state = HTTPSTATE_READY;
c->is_packetized = 1;
c->rtp_protocol = rtp_protocol;
/* protocol is shown in statistics */
switch(c->rtp_protocol) {
case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
proto_str = "MCAST";
break;
case RTSP_LOWER_TRANSPORT_UDP:
proto_str = "UDP";
break;
case RTSP_LOWER_TRANSPORT_TCP:
proto_str = "TCP";
break;
default:
proto_str = "???";
break;
}
av_strlcpy(c->protocol, "RTP/", sizeof(c->protocol));
av_strlcat(c->protocol, proto_str, sizeof(c->protocol));
current_bandwidth += stream->bandwidth;
c->next = first_http_ctx;
first_http_ctx = c;
return c;
fail:
if (c) {
av_freep(&c->buffer);
av_free(c);
}
return NULL;
}
/**
* add a new RTP stream in an RTP connection (used in RTSP SETUP
* command). If RTP/TCP protocol is used, TCP connection 'rtsp_c' is
* used.
*/
static int rtp_new_av_stream(HTTPContext *c,
int stream_index, struct sockaddr_in *dest_addr,
HTTPContext *rtsp_c)
{
AVFormatContext *ctx;
AVStream *st;
char *ipaddr;
URLContext *h = NULL;
uint8_t *dummy_buf;
int max_packet_size;
void *st_internal;
/* now we can open the relevant output stream */
ctx = avformat_alloc_context();
if (!ctx)
return -1;
ctx->oformat = av_guess_format("rtp", NULL, NULL);
st = avformat_new_stream(ctx, NULL);
if (!st)
goto fail;
st_internal = st->internal;
if (!c->stream->feed ||
c->stream->feed == c->stream)
unlayer_stream(st, c->stream->streams[stream_index]);
else
unlayer_stream(st,
c->stream->feed->streams[c->stream->feed_streams[stream_index]]);
av_assert0(st->priv_data == NULL);
av_assert0(st->internal == st_internal);
/* build destination RTP address */
ipaddr = inet_ntoa(dest_addr->sin_addr);
switch(c->rtp_protocol) {
case RTSP_LOWER_TRANSPORT_UDP:
case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
/* RTP/UDP case */
/* XXX: also pass as parameter to function ? */
if (c->stream->is_multicast) {
int ttl;
ttl = c->stream->multicast_ttl;
if (!ttl)
ttl = 16;
snprintf(ctx->filename, sizeof(ctx->filename),
"rtp://%s:%d?multicast=1&ttl=%d",
ipaddr, ntohs(dest_addr->sin_port), ttl);
} else {
snprintf(ctx->filename, sizeof(ctx->filename),
"rtp://%s:%d", ipaddr, ntohs(dest_addr->sin_port));
}
if (ffurl_open(&h, ctx->filename, AVIO_FLAG_WRITE, NULL, NULL) < 0)
goto fail;
c->rtp_handles[stream_index] = h;
max_packet_size = h->max_packet_size;
break;
case RTSP_LOWER_TRANSPORT_TCP:
/* RTP/TCP case */
c->rtsp_c = rtsp_c;
max_packet_size = RTSP_TCP_MAX_PACKET_SIZE;
break;
default:
goto fail;
}
http_log("%s:%d - - \"PLAY %s/streamid=%d %s\"\n",
ipaddr, ntohs(dest_addr->sin_port),
c->stream->filename, stream_index, c->protocol);
/* normally, no packets should be output here, but the packet size may
* be checked */
if (ffio_open_dyn_packet_buf(&ctx->pb, max_packet_size) < 0)
/* XXX: close stream */
goto fail;
if (avformat_write_header(ctx, NULL) < 0) {
fail:
if (h)
ffurl_close(h);
av_free(st);
av_free(ctx);
return -1;
}
avio_close_dyn_buf(ctx->pb, &dummy_buf);
ctx->pb = NULL;
av_free(dummy_buf);
c->rtp_ctx[stream_index] = ctx;
return 0;
}
/********************************************************************/
/* ffserver initialization */
/* FIXME: This code should use avformat_new_stream() */
static LayeredAVStream *add_av_stream1(FFServerStream *stream,
AVCodecContext *codec, int copy)
{
LayeredAVStream *fst;
if(stream->nb_streams >= FF_ARRAY_ELEMS(stream->streams))
return NULL;
fst = av_mallocz(sizeof(*fst));
if (!fst)
return NULL;
if (copy) {
fst->codec = avcodec_alloc_context3(codec->codec);
if (!fst->codec) {
av_free(fst);
return NULL;
}
avcodec_copy_context(fst->codec, codec);
} else
/* live streams must use the actual feed's codec since it may be
* updated later to carry extradata needed by them.
*/
fst->codec = codec;
//NOTE we previously allocated internal & internal->avctx, these seemed uneeded though
fst->codecpar = avcodec_parameters_alloc();
fst->index = stream->nb_streams;
fst->time_base = codec->time_base;
fst->pts_wrap_bits = 33;
fst->sample_aspect_ratio = codec->sample_aspect_ratio;
stream->streams[stream->nb_streams++] = fst;
return fst;
}
/* return the stream number in the feed */
static int add_av_stream(FFServerStream *feed, LayeredAVStream *st)
{
LayeredAVStream *fst;
AVCodecContext *av, *av1;
int i;
av = st->codec;
for(i=0;i<feed->nb_streams;i++) {
av1 = feed->streams[i]->codec;
if (av1->codec_id == av->codec_id &&
av1->codec_type == av->codec_type &&
av1->bit_rate == av->bit_rate) {
switch(av->codec_type) {
case AVMEDIA_TYPE_AUDIO:
if (av1->channels == av->channels &&
av1->sample_rate == av->sample_rate)
return i;
break;
case AVMEDIA_TYPE_VIDEO:
if (av1->width == av->width &&
av1->height == av->height &&
av1->time_base.den == av->time_base.den &&
av1->time_base.num == av->time_base.num &&
av1->gop_size == av->gop_size)
return i;
break;
default:
abort();
}
}
}
fst = add_av_stream1(feed, av, 0);
if (!fst)
return -1;
if (st->recommended_encoder_configuration)
fst->recommended_encoder_configuration =
av_strdup(st->recommended_encoder_configuration);
return feed->nb_streams - 1;
}
static void remove_stream(FFServerStream *stream)
{
FFServerStream **ps;
ps = &config.first_stream;
while (*ps) {
if (*ps == stream)
*ps = (*ps)->next;
else
ps = &(*ps)->next;
}
}
/* compute the needed AVStream for each file */
static void build_file_streams(void)
{
FFServerStream *stream;
AVFormatContext *infile;
int i, ret;
/* gather all streams */
for(stream = config.first_stream; stream; stream = stream->next) {
infile = NULL;
if (stream->stream_type != STREAM_TYPE_LIVE || stream->feed)
continue;
/* the stream comes from a file */
/* try to open the file */
/* open stream */
/* specific case: if transport stream output to RTP,
* we use a raw transport stream reader */
if (stream->fmt && !strcmp(stream->fmt->name, "rtp"))
av_dict_set(&stream->in_opts, "mpeg2ts_compute_pcr", "1", 0);
if (!stream->feed_filename[0]) {
http_log("Unspecified feed file for stream '%s'\n",
stream->filename);
goto fail;
}
http_log("Opening feed file '%s' for stream '%s'\n",
stream->feed_filename, stream->filename);
ret = avformat_open_input(&infile, stream->feed_filename,
stream->ifmt, &stream->in_opts);
if (ret < 0) {
http_log("Could not open '%s': %s\n", stream->feed_filename,
av_err2str(ret));
/* remove stream (no need to spend more time on it) */
fail:
remove_stream(stream);
} else {
/* find all the AVStreams inside and reference them in
* 'stream' */
if (avformat_find_stream_info(infile, NULL) < 0) {
http_log("Could not find codec parameters from '%s'\n",
stream->feed_filename);
avformat_close_input(&infile);
goto fail;
}
for(i=0;i<infile->nb_streams;i++)
add_av_stream1(stream, infile->streams[i]->codec, 1);
avformat_close_input(&infile);
}
}
}
static inline
int check_codec_match(LayeredAVStream *ccf, AVStream *ccs, int stream)
{
int matches = 1;
/* FIXME: Missed check on AVCodecContext.flags */
#define CHECK_CODEC(x) (ccf->codecpar->x != ccs->codecpar->x)
if (CHECK_CODEC(codec_id) || CHECK_CODEC(codec_type)) {
http_log("Codecs do not match for stream %d\n", stream);
matches = 0;
} else if (CHECK_CODEC(bit_rate)) {
http_log("Codec bitrates do not match for stream %d\n", stream);
matches = 0;
} else if (ccf->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
if (av_cmp_q(ccf->time_base, ccs->time_base) ||
CHECK_CODEC(width) || CHECK_CODEC(height)) {
http_log("Codec width, height or framerate do not match for stream %d\n", stream);
matches = 0;
}
} else if (ccf->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
if (CHECK_CODEC(sample_rate) ||
CHECK_CODEC(channels) ||
CHECK_CODEC(frame_size)) {
http_log("Codec sample_rate, channels, frame_size do not match for stream %d\n", stream);
matches = 0;
}
} else {
http_log("Unknown codec type for stream %d\n", stream);
matches = 0;
}
return matches;
}
/* compute the needed AVStream for each feed */
static int build_feed_streams(void)
{
FFServerStream *stream, *feed;
int i, fd;
/* gather all streams */
for(stream = config.first_stream; stream; stream = stream->next) {
feed = stream->feed;
if (!feed)
continue;
if (stream->is_feed) {
for(i=0;i<stream->nb_streams;i++)
stream->feed_streams[i] = i;
continue;
}
/* we handle a stream coming from a feed */
for(i=0;i<stream->nb_streams;i++)
stream->feed_streams[i] = add_av_stream(feed, stream->streams[i]);
}
/* create feed files if needed */
for(feed = config.first_feed; feed; feed = feed->next_feed) {
if (avio_check(feed->feed_filename, AVIO_FLAG_READ) > 0) {
AVFormatContext *s = NULL;
int matches = 0;
/* See if it matches */
if (avformat_open_input(&s, feed->feed_filename, NULL, NULL) < 0) {
http_log("Deleting feed file '%s' as it appears "
"to be corrupt\n",
feed->feed_filename);
goto drop;
}
/* set buffer size */
if (ffio_set_buf_size(s->pb, FFM_PACKET_SIZE) < 0) {
http_log("Failed to set buffer size\n");
avformat_close_input(&s);
goto bail;
}
/* Now see if it matches */
if (s->nb_streams != feed->nb_streams) {
http_log("Deleting feed file '%s' as stream counts "
"differ (%d != %d)\n",
feed->feed_filename, s->nb_streams, feed->nb_streams);
goto drop;
}
matches = 1;
for(i=0;i<s->nb_streams;i++) {
AVStream *ss;
LayeredAVStream *sf;
sf = feed->streams[i];
ss = s->streams[i];
if (sf->index != ss->index || sf->id != ss->id) {
http_log("Index & Id do not match for stream %d (%s)\n",
i, feed->feed_filename);
matches = 0;
break;
}
matches = check_codec_match (sf, ss, i);
if (!matches)
break;
}
drop:
if (s)
avformat_close_input(&s);
if (!matches) {
if (feed->readonly) {
http_log("Unable to delete read-only feed file '%s'\n",
feed->feed_filename);
goto bail;
}
unlink(feed->feed_filename);
}
}
if (avio_check(feed->feed_filename, AVIO_FLAG_WRITE) <= 0) {
AVFormatContext *s = avformat_alloc_context();
if (!s) {
http_log("Failed to allocate context\n");
goto bail;
}
if (feed->readonly) {
http_log("Unable to create feed file '%s' as it is "
"marked readonly\n",
feed->feed_filename);
avformat_free_context(s);
goto bail;
}
/* only write the header of the ffm file */
if (avio_open(&s->pb, feed->feed_filename, AVIO_FLAG_WRITE) < 0) {
http_log("Could not open output feed file '%s'\n",
feed->feed_filename);
avformat_free_context(s);
goto bail;
}
s->oformat = feed->fmt;
for (i = 0; i<feed->nb_streams; i++) {
AVStream *st = avformat_new_stream(s, NULL); // FIXME free this
if (!st) {
http_log("Failed to allocate stream\n");
goto bail;
}
unlayer_stream(st, feed->streams[i]);
}
if (avformat_write_header(s, NULL) < 0) {
http_log("Container doesn't support the required parameters\n");
avio_closep(&s->pb);
s->streams = NULL;
s->nb_streams = 0;
avformat_free_context(s);
goto bail;
}
/* XXX: need better API */
av_freep(&s->priv_data);
avio_closep(&s->pb);
s->streams = NULL;
s->nb_streams = 0;
avformat_free_context(s);
}
/* get feed size and write index */
fd = open(feed->feed_filename, O_RDONLY);
if (fd < 0) {
http_log("Could not open output feed file '%s'\n",
feed->feed_filename);
goto bail;
}
feed->feed_write_index = FFMAX(ffm_read_write_index(fd),
FFM_PACKET_SIZE);
feed->feed_size = lseek(fd, 0, SEEK_END);
/* ensure that we do not wrap before the end of file */
if (feed->feed_max_size && feed->feed_max_size < feed->feed_size)
feed->feed_max_size = feed->feed_size;
close(fd);
}
return 0;
bail:
return -1;
}
/* compute the bandwidth used by each stream */
static void compute_bandwidth(void)
{
unsigned bandwidth;
int i;
FFServerStream *stream;
for(stream = config.first_stream; stream; stream = stream->next) {
bandwidth = 0;
for(i=0;i<stream->nb_streams;i++) {
LayeredAVStream *st = stream->streams[i];
switch(st->codec->codec_type) {
case AVMEDIA_TYPE_AUDIO:
case AVMEDIA_TYPE_VIDEO:
bandwidth += st->codec->bit_rate;
break;
default:
break;
}
}
stream->bandwidth = (bandwidth + 999) / 1000;
}
}
static void handle_child_exit(int sig)
{
pid_t pid;
int status;
time_t uptime;
while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
FFServerStream *feed;
for (feed = config.first_feed; feed; feed = feed->next) {
if (feed->pid != pid)
continue;
uptime = time(0) - feed->pid_start;
feed->pid = 0;
fprintf(stderr,
"%s: Pid %"PRId64" exited with status %d after %"PRId64" "
"seconds\n",
feed->filename, (int64_t) pid, status, (int64_t)uptime);
if (uptime < 30)
/* Turn off any more restarts */
ffserver_free_child_args(&feed->child_argv);
}
}
need_to_start_children = 1;
}
static void opt_debug(void)
{
config.debug = 1;
snprintf(config.logfilename, sizeof(config.logfilename), "-");
}
void show_help_default(const char *opt, const char *arg)
{
printf("usage: ffserver [options]\n"
"Hyper fast multi format Audio/Video streaming server\n");
printf("\n");
show_help_options(options, "Main options:", 0, 0, 0);
}
static const OptionDef options[] = {
#include "cmdutils_common_opts.h"
{ "n", OPT_BOOL, {(void *)&no_launch }, "enable no-launch mode" },
{ "d", 0, {(void*)opt_debug}, "enable debug mode" },
{ "f", HAS_ARG | OPT_STRING, {(void*)&config.filename }, "use configfile instead of /etc/ffserver.conf", "configfile" },
{ NULL },
};
int main(int argc, char **argv)
{
struct sigaction sigact = { { 0 } };
int cfg_parsed;
int ret = EXIT_FAILURE;
init_dynload();
config.filename = av_strdup("/etc/ffserver.conf");
parse_loglevel(argc, argv, options);
av_register_all();
avformat_network_init();
show_banner(argc, argv, options);
my_program_name = argv[0];
parse_options(NULL, argc, argv, options, NULL);
unsetenv("http_proxy"); /* Kill the http_proxy */
av_lfg_init(&random_state, av_get_random_seed());
sigact.sa_handler = handle_child_exit;
sigact.sa_flags = SA_NOCLDSTOP | SA_RESTART;
sigaction(SIGCHLD, &sigact, 0);
if ((cfg_parsed = ffserver_parse_ffconfig(config.filename, &config)) < 0) {
fprintf(stderr, "Error reading configuration file '%s': %s\n",
config.filename, av_err2str(cfg_parsed));
goto bail;
}
/* open log file if needed */
if (config.logfilename[0] != '\0') {
if (!strcmp(config.logfilename, "-"))
logfile = stdout;
else
logfile = fopen(config.logfilename, "a");
av_log_set_callback(http_av_log);
}
build_file_streams();
if (build_feed_streams() < 0) {
http_log("Could not setup feed streams\n");
goto bail;
}
compute_bandwidth();
/* signal init */
signal(SIGPIPE, SIG_IGN);
if (http_server() < 0) {
http_log("Could not start server\n");
goto bail;
}
ret=EXIT_SUCCESS;
bail:
av_freep (&config.filename);
avformat_network_deinit();
return ret;
}
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