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rtpp_command.c
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rtpp_command.c
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/*
* Copyright (c) 2004-2006 Maxim Sobolev <[email protected]>
* Copyright (c) 2006-2007 Sippy Software, Inc., http://www.sippysoft.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include "config.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/uio.h>
#include <netinet/in.h>
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <netdb.h>
#include <pthread.h>
#include <sched.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "rtpp_command.h"
#include "rtpp_log.h"
#include "rtpp_notify.h"
#include "rtpp_record.h"
#include "rtpp_session.h"
#include "rtpp_util.h"
struct proto_cap proto_caps[] = {
/*
* The first entry must be basic protocol version and isn't shown
* as extension on -v.
*/
{ "20040107", "Basic RTP proxy functionality" },
{ "20050322", "Support for multiple RTP streams and MOH" },
{ "20060704", "Support for extra parameter in the V command" },
{ "20071116", "Support for RTP re-packetization" },
{ "20071218", "Support for forking (copying) RTP stream" },
{ "20080403", "Support for RTP statistics querying" },
{ "20081102", "Support for setting codecs in the update/lookup command" },
{ "20081224", "Support for session timeout notifications" },
{ "20090810", "Support for automatic bridging" },
{ NULL, NULL }
};
static int create_twinlistener(struct cfg_stable *, struct sockaddr *, int, int *);
static int create_listener(struct cfg *, struct sockaddr *, int *, int *);
static int handle_delete(struct cfg *, char *, char *, char *, int);
static void handle_noplay(struct cfg *, struct rtpp_session *, int);
static int handle_play(struct cfg *, struct rtpp_session *, int, char *, char *, int);
static void handle_copy(struct cfg *, struct rtpp_session *, int, char *);
static int handle_record(struct cfg *, char *, char *, char *);
static void handle_query(struct cfg *, int, struct rtpp_command *,
struct rtpp_session *, int);
static void handle_info(struct cfg *, int, struct rtpp_command *,
int);
static int
create_twinlistener(struct cfg_stable *cf, struct sockaddr *ia, int port, int *fds)
{
struct sockaddr_storage iac;
int rval, i, flags;
fds[0] = fds[1] = -1;
rval = -1;
for (i = 0; i < 2; i++) {
fds[i] = socket(ia->sa_family, SOCK_DGRAM, 0);
if (fds[i] == -1) {
rtpp_log_ewrite(RTPP_LOG_ERR, cf->glog, "can't create %s socket",
(ia->sa_family == AF_INET) ? "IPv4" : "IPv6");
goto failure;
}
memcpy(&iac, ia, SA_LEN(ia));
satosin(&iac)->sin_port = htons(port);
if (bind(fds[i], sstosa(&iac), SA_LEN(ia)) != 0) {
if (errno != EADDRINUSE && errno != EACCES) {
rtpp_log_ewrite(RTPP_LOG_ERR, cf->glog, "can't bind to the %s port %d",
(ia->sa_family == AF_INET) ? "IPv4" : "IPv6", port);
} else {
rval = -2;
}
goto failure;
}
port++;
if ((ia->sa_family == AF_INET) && (cf->tos >= 0) &&
(setsockopt(fds[i], IPPROTO_IP, IP_TOS, &cf->tos, sizeof(cf->tos)) == -1))
rtpp_log_ewrite(RTPP_LOG_ERR, cf->glog, "unable to set TOS to %d", cf->tos);
flags = fcntl(fds[i], F_GETFL);
fcntl(fds[i], F_SETFL, flags | O_NONBLOCK);
}
return 0;
failure:
for (i = 0; i < 2; i++)
if (fds[i] != -1) {
close(fds[i]);
fds[i] = -1;
}
return rval;
}
static int
create_listener(struct cfg *cf, struct sockaddr *ia, int *port, int *fds)
{
int i, idx, rval;
for (i = 0; i < 2; i++)
fds[i] = -1;
for (i = 1; i < cf->stable.port_table_len; i++) {
idx = (cf->port_table_idx + i) % cf->stable.port_table_len;
*port = cf->stable.port_table[idx];
rval = create_twinlistener(&(cf->stable), ia, *port, fds);
if (rval == 0) {
cf->port_table_idx = idx;
return 0;
}
if (rval == -1)
break;
}
return -1;
}
static void
doreply(struct cfg_stable *cf, int fd, char *buf, int len,
struct sockaddr_storage *raddr, socklen_t rlen)
{
buf[len] = '\0';
rtpp_log_write(RTPP_LOG_DBUG, cf->glog, "sending reply \"%s\"", buf);
if (cf->umode == 0) {
write(fd, buf, len);
} else {
while (sendto(fd, buf, len, 0, sstosa(raddr),
rlen) == -1 && errno == ENOBUFS);
}
}
static void
reply_number(struct cfg_stable *cf, int fd, struct rtpp_command *cmd,
int number)
{
int len;
char buf[1024 * 8];
if (cmd->cookie != NULL)
len = sprintf(buf, "%s %d\n", cmd->cookie, number);
else {
len = sprintf(buf, "%d\n", number);
}
doreply(cf, fd, buf, len, &cmd->raddr, cmd->rlen);
}
static void
reply_ok(struct cfg_stable *cf, int fd, struct rtpp_command *cmd)
{
reply_number(cf, fd, cmd, 0);
}
static void
reply_port(struct cfg_stable *cf, int fd, struct rtpp_command *cmd,
int lport, struct sockaddr **lia)
{
int len;
char buf[1024 * 8], *cp;
cp = buf;
len = 0;
if (cmd->cookie != NULL) {
len = sprintf(cp, "%s ", cmd->cookie);
cp += len;
}
if (lia[0] == NULL || ishostnull(lia[0]))
len += sprintf(cp, "%d\n", lport);
else {
if(cf->advaddr[0] != NULL) {
if(cf->bmode!=0 && cf->advaddr[1]!=NULL
&& lia[0]==cf->bindaddr[1]) {
len += sprintf(cp, "%d %s%s\n", lport, cf->advaddr[1],
(lia[0]->sa_family == AF_INET) ? "" : " 6");
} else {
len += sprintf(cp, "%d %s%s\n", lport, cf->advaddr[0],
(lia[0]->sa_family == AF_INET) ? "" : " 6");
}
} else {
len += sprintf(cp, "%d %s%s\n", lport, addr2char(lia[0]),
(lia[0]->sa_family == AF_INET) ? "" : " 6");
}
}
doreply(cf, fd, buf, len, &cmd->raddr, cmd->rlen);
}
static void
reply_error(struct cfg_stable *cf, int fd, struct rtpp_command *cmd,
int ecode)
{
int len;
char buf[1024 * 8];
if (cmd->cookie != NULL)
len = sprintf(buf, "%s E%d\n", cmd->cookie, ecode);
else
len = sprintf(buf, "E%d\n", ecode);
doreply(cf, fd, buf, len, &cmd->raddr, cmd->rlen);
}
static void
handle_nomem(struct cfg_stable *cf, int fd, struct rtpp_command *cmd,
int ecode, struct sockaddr **ia, int *fds,
struct rtpp_session *spa, struct rtpp_session *spb)
{
int i;
rtpp_log_write(RTPP_LOG_ERR, cf->glog, "can't allocate memory");
for (i = 0; i < 2; i++)
if (ia[i] != NULL)
free(ia[i]);
if (spa != NULL) {
if (spa->call_id != NULL)
free(spa->call_id);
free(spa);
}
if (spb != NULL)
free(spb);
for (i = 0; i < 2; i++)
if (fds[i] != -1)
close(fds[i]);
reply_error(cf, fd, cmd, ecode);
}
int
get_command(struct cfg_stable *cfs, int controlfd, struct rtpp_command *cmd)
{
char **ap;
char *cp;
int len, i;
if (cfs->umode == 0) {
for (;;) {
len = read(controlfd, cmd->buf, sizeof(cmd->buf) - 1);
if (len != -1 || (errno != EAGAIN && errno != EINTR))
break;
sched_yield();
}
} else {
cmd->rlen = sizeof(cmd->raddr);
len = recvfrom(controlfd, cmd->buf, sizeof(cmd->buf) - 1, 0,
sstosa(&cmd->raddr), &cmd->rlen);
}
if (len == -1) {
if (errno != EAGAIN && errno != EINTR)
rtpp_log_ewrite(RTPP_LOG_ERR, cfs->glog, "can't read from control socket");
return (-1);
}
cmd->buf[len] = '\0';
rtpp_log_write(RTPP_LOG_DBUG, cfs->glog, "received command \"%s\"", cmd->buf);
cp = cmd->buf;
cmd->argc = 0;
memset(cmd->argv, 0, sizeof(cmd->argv));
for (ap = cmd->argv; (*ap = rtpp_strsep(&cp, "\r\n\t ")) != NULL;)
if (**ap != '\0') {
cmd->argc++;
if (++ap >= &cmd->argv[10])
break;
}
cmd->cookie = NULL;
if (cmd->argc < 1 || (cfs->umode != 0 && cmd->argc < 2)) {
rtpp_log_write(RTPP_LOG_ERR, cfs->glog, "command syntax error");
reply_error(cfs, controlfd, cmd, 0);
return (0);
}
/* Stream communication mode doesn't use cookie */
if (cfs->umode != 0) {
cmd->cookie = cmd->argv[0];
for (i = 1; i < cmd->argc; i++)
cmd->argv[i - 1] = cmd->argv[i];
cmd->argc--;
cmd->argv[cmd->argc] = NULL;
} else {
cmd->cookie = NULL;
}
return (cmd->argc);
}
int
handle_command(struct cfg *cf, int controlfd, struct rtpp_command *cmd, double dtime)
{
int len, i, pidx, asymmetric;
int external, pf, lidx, playcount, weak, tpf;
int fds[2], lport, n;
char *cp, *call_id, *from_tag, *to_tag, *addr, *port;
char *pname, *codecs, *recording_name, *t;
struct rtpp_session *spa, *spb;
const char *rname, *errmsg;
struct sockaddr *ia[2], *lia[2];
int requested_nsamples;
enum {DELETE, RECORD, PLAY, NOPLAY, COPY, UPDATE, LOOKUP, QUERY} op;
int max_argc;
char *socket_name_u, *notify_tag;
struct sockaddr *local_addr;
char c;
requested_nsamples = -1;
ia[0] = ia[1] = NULL;
spa = spb = NULL;
lia[0] = lia[1] = cf->stable.bindaddr[0];
lidx = 1;
fds[0] = fds[1] = -1;
recording_name = NULL;
socket_name_u = notify_tag = NULL;
local_addr = NULL;
codecs = NULL;
addr = port = NULL;
switch (cmd->argv[0][0]) {
case 'u':
case 'U':
/* U[opts] callid remote_ip remote_port from_tag [to_tag] */
op = UPDATE;
rname = "update/create";
break;
case 'l':
case 'L':
op = LOOKUP;
rname = "lookup";
break;
case 'd':
case 'D':
op = DELETE;
rname = "delete";
break;
case 'p':
case 'P':
/*
* P callid pname codecs from_tag to_tag
*
* <codecs> could be either comma-separated list of supported
* payload types or word "session" (without quotes), in which
* case list saved on last session update will be used instead.
*/
op = PLAY;
rname = "play";
playcount = 1;
pname = cmd->argv[2];
codecs = cmd->argv[3];
break;
case 'r':
case 'R':
op = RECORD;
rname = "record";
break;
case 'c':
case 'C':
op = COPY;
rname = "copy";
break;
case 's':
case 'S':
op = NOPLAY;
rname = "noplay";
break;
case 'v':
case 'V':
if (cmd->argv[0][1] == 'F' || cmd->argv[0][1] == 'f') {
int i, known;
/*
* Wait for protocol version datestamp and check whether we
* know it.
*/
if (cmd->argc != 2 && cmd->argc != 3) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "command syntax error");
reply_error(&cf->stable, controlfd, cmd, 2);
return 0;
}
/*
* Only list 20081224 protocol mod as supported if
* user actually enabled notification with -n
*/
if (strcmp(cmd->argv[1], "20081224") == 0 &&
cf->timeout_handler == NULL) {
reply_number(&cf->stable, controlfd, cmd, 0);
return 0;
}
for (known = i = 0; proto_caps[i].pc_id != NULL; ++i) {
if (!strcmp(cmd->argv[1], proto_caps[i].pc_id)) {
known = 1;
break;
}
}
reply_number(&cf->stable, controlfd, cmd, known);
return 0;
}
if (cmd->argc != 1 && cmd->argc != 2) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "command syntax error");
reply_error(&cf->stable, controlfd, cmd, 2);
return 0;
}
/* This returns base version. */
reply_number(&cf->stable, controlfd, cmd, CPROTOVER);
return 0;
case 'i':
case 'I':
handle_info(cf, controlfd, cmd,
(cmd->argv[0][1] == 'b' || cmd->argv[0][1] == 'B') ? 1 : 0);
return 0;
break;
case 'q':
case 'Q':
op = QUERY;
rname = "query";
break;
case 'x':
case 'X':
/* Delete all active sessions */
rtpp_log_write(RTPP_LOG_INFO, cf->stable.glog, "deleting all active sessions");
pthread_mutex_lock(&cf->sessinfo.lock);
for (i = 0; i < cf->sessinfo.nsessions; i++) {
spa = cf->sessinfo.sessions[i];
if (spa == NULL || spa->sidx[0] != i)
continue;
/* Skip RTCP twin session */
if (spa->rtcp != NULL) {
remove_session(cf, spa);
}
}
pthread_mutex_unlock(&cf->sessinfo.lock);
reply_ok(&cf->stable, controlfd, cmd);
return 0;
break;
default:
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "unknown command");
reply_error(&cf->stable, controlfd, cmd, 3);
return 0;
}
call_id = cmd->argv[1];
if (op == UPDATE || op == LOOKUP || op == PLAY) {
max_argc = (op == UPDATE ? 8 : 6);
if (cmd->argc < 5 || cmd->argc > max_argc) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "command syntax error");
reply_error(&cf->stable, controlfd, cmd, 4);
return 0;
}
from_tag = cmd->argv[4];
to_tag = cmd->argv[5];
if (op == PLAY && cmd->argv[0][1] != '\0')
playcount = atoi(cmd->argv[0] + 1);
if (op == UPDATE && cmd->argc > 6) {
socket_name_u = cmd->argv[6];
if (strncmp("unix:", socket_name_u, 5) == 0)
socket_name_u += 5;
if (cmd->argc == 8) {
notify_tag = cmd->argv[7];
len = url_unquote((uint8_t *)notify_tag, strlen(notify_tag));
if (len == -1) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog,
"command syntax error - invalid URL encoding");
reply_error(&cf->stable, controlfd, cmd, 4);
return 0;
}
notify_tag[len] = '\0';
}
}
}
if (op == COPY) {
if (cmd->argc < 4 || cmd->argc > 5) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "command syntax error");
reply_error(&cf->stable, controlfd, cmd, 1);
return 0;
}
recording_name = cmd->argv[2];
from_tag = cmd->argv[3];
to_tag = cmd->argv[4];
}
if (op == DELETE || op == RECORD || op == NOPLAY || op == QUERY) {
if (cmd->argc < 3 || cmd->argc > 4) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "command syntax error");
reply_error(&cf->stable, controlfd, cmd, 1);
return 0;
}
from_tag = cmd->argv[2];
to_tag = cmd->argv[3];
}
if (op == DELETE || op == RECORD || op == COPY || op == NOPLAY) {
/* D, R and S commands don't take any modifiers */
if (cmd->argv[0][1] != '\0') {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "command syntax error");
reply_error(&cf->stable, controlfd, cmd, 1);
return 0;
}
}
if (op == UPDATE || op == LOOKUP || op == DELETE) {
addr = cmd->argv[2];
port = cmd->argv[3];
/* Process additional command modifiers */
external = 1;
/* In bridge mode all clients are assumed to be asymmetric */
asymmetric = (cf->stable.bmode != 0) ? 1 : 0;
pf = AF_INET;
weak = 0;
for (cp = cmd->argv[0] + 1; *cp != '\0'; cp++) {
switch (*cp) {
case 'a':
case 'A':
asymmetric = 1;
break;
case 'e':
case 'E':
if (lidx < 0) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "command syntax error");
reply_error(&cf->stable, controlfd, cmd, 1);
return 0;
}
lia[lidx] = cf->stable.bindaddr[1];
lidx--;
break;
case 'i':
case 'I':
if (lidx < 0) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "command syntax error");
reply_error(&cf->stable, controlfd, cmd, 1);
return 0;
}
lia[lidx] = cf->stable.bindaddr[0];
lidx--;
break;
case '6':
pf = AF_INET6;
break;
case 's':
case 'S':
asymmetric = 0;
break;
case 'w':
case 'W':
weak = 1;
break;
case 'z':
case 'Z':
requested_nsamples = (strtol(cp + 1, &cp, 10) / 10) * 80;
if (requested_nsamples <= 0) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "command syntax error");
reply_error(&cf->stable, controlfd, cmd, 1);
return 0;
}
cp--;
break;
case 'c':
case 'C':
cp += 1;
for (t = cp; *cp != '\0'; cp++) {
if (!isdigit(*cp) && *cp != ',')
break;
}
if (t == cp) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "command syntax error");
reply_error(&cf->stable, controlfd, cmd, 1);
return 0;
}
codecs = alloca(cp - t + 1);
memcpy(codecs, t, cp - t);
codecs[cp - t] = '\0';
cp--;
break;
case 'l':
case 'L':
len = extractaddr(cp + 1, &t, &cp, &tpf);
if (len == -1) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "command syntax error");
reply_error(&cf->stable, controlfd, cmd, 1);
return 0;
}
c = t[len];
t[len] = '\0';
pthread_mutex_unlock(&cf->glock);
local_addr = host2bindaddr(cf, t, tpf, &errmsg);
pthread_mutex_lock(&cf->glock);
if (local_addr == NULL) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog,
"invalid local address: %s: %s", t, errmsg);
reply_error(&cf->stable, controlfd, cmd, 1);
return 0;
}
t[len] = c;
cp--;
break;
case 'r':
case 'R':
len = extractaddr(cp + 1, &t, &cp, &tpf);
if (len == -1) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "command syntax error");
reply_error(&cf->stable, controlfd, cmd, 1);
return 0;
}
c = t[len];
t[len] = '\0';
local_addr = alloca(sizeof(struct sockaddr_storage));
pthread_mutex_unlock(&cf->glock);
n = resolve(local_addr, tpf, t, SERVICE, AI_PASSIVE);
pthread_mutex_lock(&cf->glock);
if (n != 0) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog,
"invalid remote address: %s: %s", t, gai_strerror(n));
reply_error(&cf->stable, controlfd, cmd, 1);
return 0;
}
if (local4remote(local_addr, satoss(local_addr)) == -1) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog,
"can't find local address for remote address: %s", t);
reply_error(&cf->stable, controlfd, cmd, 1);
return 0;
}
local_addr = addr2bindaddr(cf, local_addr, &errmsg);
if (local_addr == NULL) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog,
"invalid local address: %s", errmsg);
reply_error(&cf->stable, controlfd, cmd, 1);
return 0;
}
t[len] = c;
cp--;
break;
default:
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "unknown command modifier `%c'",
*cp);
break;
}
}
if (op != DELETE && addr != NULL && port != NULL && strlen(addr) >= 7) {
struct sockaddr_storage tia;
pthread_mutex_unlock(&cf->glock);
n = resolve(sstosa(&tia), pf, addr, port, AI_NUMERICHOST);
pthread_mutex_lock(&cf->glock);
if (n == 0) {
if (!ishostnull(sstosa(&tia))) {
for (i = 0; i < 2; i++) {
ia[i] = malloc(SS_LEN(&tia));
if (ia[i] == NULL) {
handle_nomem(&cf->stable, controlfd, cmd,
5, ia, fds, spa, spb);
return 0;
}
memcpy(ia[i], &tia, SS_LEN(&tia));
}
/* Set port for RTCP, will work both for IPv4 and IPv6 */
n = ntohs(satosin(ia[1])->sin_port);
satosin(ia[1])->sin_port = htons(n + 1);
}
} else {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "getaddrinfo: %s",
gai_strerror(n));
}
}
}
/*
* Record and delete need special handling since they apply to all
* streams in the session.
*/
switch (op) {
case DELETE:
i = handle_delete(cf, call_id, from_tag, to_tag, weak);
break;
case RECORD:
i = handle_record(cf, call_id, from_tag, to_tag);
break;
default:
i = find_stream(cf, call_id, from_tag, to_tag, &spa);
if (i != -1 && op != UPDATE)
i = NOT(i);
break;
}
if (i == -1 && op != UPDATE) {
rtpp_log_write(RTPP_LOG_INFO, cf->stable.glog,
"%s request failed: session %s, tags %s/%s not found", rname,
call_id, from_tag, to_tag != NULL ? to_tag : "NONE");
if (op == LOOKUP) {
for (i = 0; i < 2; i++)
if (ia[i] != NULL)
free(ia[i]);
reply_port(&cf->stable, controlfd, cmd, 0, lia);
return 0;
}
reply_error(&cf->stable, controlfd, cmd, 8);
return 0;
}
switch (op) {
case DELETE:
case RECORD:
reply_ok(&cf->stable, controlfd, cmd);
return 0;
case NOPLAY:
handle_noplay(cf, spa, i);
reply_ok(&cf->stable, controlfd, cmd);
return 0;
case PLAY:
handle_noplay(cf, spa, i);
if (strcmp(codecs, "session") == 0) {
if (spa->codecs[i] == NULL) {
reply_error(&cf->stable, controlfd, cmd, 6);
return 0;
}
codecs = spa->codecs[i];
}
if (playcount != 0 && handle_play(cf, spa, i, codecs, pname, playcount) != 0) {
reply_error(&cf->stable, controlfd, cmd, 6);
return 0;
}
reply_ok(&cf->stable, controlfd, cmd);
return 0;
case COPY:
handle_copy(cf, spa, i, recording_name);
reply_ok(&cf->stable, controlfd, cmd);
return 0;
case QUERY:
handle_query(cf, controlfd, cmd, spa, i);
return 0;
case LOOKUP:
case UPDATE:
/* those are handled below */
break;
default:
/* Programmatic error, should not happen */
abort();
}
pidx = 1;
lport = 0;
if (i != -1) {
assert(op == UPDATE || op == LOOKUP);
if (spa->fds[i] == -1) {
if (local_addr != NULL) {
spa->laddr[i] = local_addr;
}
if (create_listener(cf, spa->laddr[i], &lport, fds) == -1) {
rtpp_log_write(RTPP_LOG_ERR, spa->log, "can't create listener");
reply_error(&cf->stable, controlfd, cmd, 7);
return 0;
}
assert(spa->fds[i] == -1);
spa->fds[i] = fds[0];
assert(spa->rtcp->fds[i] == -1);
spa->rtcp->fds[i] = fds[1];
spa->ports[i] = lport;
spa->rtcp->ports[i] = lport + 1;
spa->complete = spa->rtcp->complete = 1;
append_session(cf, spa, i);
append_session(cf, spa->rtcp, i);
}
if (weak)
spa->weak[i] = 1;
else if (op == UPDATE)
spa->strong = 1;
lport = spa->ports[i];
lia[0] = spa->laddr[i];
pidx = (i == 0) ? 1 : 0;
spa->ttl_mode = cf->stable.ttl_mode;
spa->ttl[0] = cf->stable.max_ttl;
spa->ttl[1] = cf->stable.max_ttl;
if (op == UPDATE) {
rtpp_log_write(RTPP_LOG_INFO, spa->log,
"adding %s flag to existing session, new=%d/%d/%d",
weak ? ( i ? "weak[1]" : "weak[0]" ) : "strong",
spa->strong, spa->weak[0], spa->weak[1]);
}
rtpp_log_write(RTPP_LOG_INFO, spa->log,
"lookup on ports %d/%d, session timer restarted", spa->ports[0],
spa->ports[1]);
} else {
assert(op == UPDATE);
rtpp_log_write(RTPP_LOG_INFO, cf->stable.glog,
"new session %s, tag %s requested, type %s",
call_id, from_tag, weak ? "weak" : "strong");
if (local_addr != NULL) {
lia[0] = lia[1] = local_addr;
if (lia[0] == NULL) {
rtpp_log_write(RTPP_LOG_ERR, spa->log,
"can't create listener: %s", t);
reply_error(&cf->stable, controlfd, cmd, 10);
return 0;
}
}
if (create_listener(cf, lia[0], &lport, fds) == -1) {
rtpp_log_write(RTPP_LOG_ERR, cf->stable.glog, "can't create listener");
reply_error(&cf->stable, controlfd, cmd, 10);
return 0;
}
/*
* Session creation. If creation is requested with weak flag,
* set weak[0].
*/
spa = malloc(sizeof(*spa));
if (spa == NULL) {
handle_nomem(&cf->stable, controlfd, cmd, 11, ia,
fds, spa, spb);
return 0;
}
/* spb is RTCP twin session for this one. */
spb = malloc(sizeof(*spb));
if (spb == NULL) {
handle_nomem(&cf->stable, controlfd, cmd, 12, ia,
fds, spa, spb);
return 0;
}
memset(spa, 0, sizeof(*spa));
memset(spb, 0, sizeof(*spb));
for (i = 0; i < 2; i++) {
spa->fds[i] = spb->fds[i] = -1;
spa->last_update[i] = 0;
spb->last_update[i] = 0;
}
spa->call_id = strdup(call_id);
if (spa->call_id == NULL) {
handle_nomem(&cf->stable, controlfd, cmd, 13, ia,
fds, spa, spb);
return 0;
}
spb->call_id = spa->call_id;
spa->tag = strdup(from_tag);
if (spa->tag == NULL) {
handle_nomem(&cf->stable, controlfd, cmd, 14, ia,
fds, spa, spb);
return 0;
}
spb->tag = spa->tag;
for (i = 0; i < 2; i++) {
spa->rrcs[i] = NULL;
spb->rrcs[i] = NULL;
spa->laddr[i] = lia[i];
spb->laddr[i] = lia[i];
}
spa->strong = spa->weak[0] = spa->weak[1] = 0;
if (weak)
spa->weak[0] = 1;
else
spa->strong = 1;
assert(spa->fds[0] == -1);
spa->fds[0] = fds[0];
assert(spb->fds[0] == -1);
spb->fds[0] = fds[1];
spa->ports[0] = lport;
spb->ports[0] = lport + 1;
spa->ttl[0] = cf->stable.max_ttl;
spa->ttl[1] = cf->stable.max_ttl;
spb->ttl[0] = -1;
spb->ttl[1] = -1;
spa->log = rtpp_log_open(&cf->stable, "rtpproxy", spa->call_id, 0);
spb->log = spa->log;
spa->rtcp = spb;
spb->rtcp = NULL;
spa->rtp = NULL;
spb->rtp = spa;
spa->sridx = spb->sridx = -1;
append_session(cf, spa, 0);
append_session(cf, spa, 1);
append_session(cf, spb, 0);
append_session(cf, spb, 1);
hash_table_append(cf, spa);
cf->sessions_created++;
cf->sessions_active++;
/*
* Each session can consume up to 5 open file descriptors (2 RTP,
* 2 RTCP and 1 logging) so that warn user when he is likely to
* exceed 80% mark on hard limit.
*/
if (cf->sessions_active > (cf->stable.nofile_limit.rlim_max * 80 / (100 * 5)) &&
cf->nofile_limit_warned == 0) {
cf->nofile_limit_warned = 1;
rtpp_log_write(RTPP_LOG_WARN, cf->stable.glog, "passed 80%% "
"threshold on the open file descriptors limit (%d), "
"consider increasing the limit using -L command line "
"option", (int)cf->stable.nofile_limit.rlim_max);
}
rtpp_log_write(RTPP_LOG_INFO, spa->log, "new session on a port %d created, "
"tag %s", lport, from_tag);
if (cf->stable.record_all != 0) {
handle_copy(cf, spa, 0, NULL);
handle_copy(cf, spa, 1, NULL);
}
}
if (op == UPDATE) {
if (cf->timeout_handler == NULL && socket_name_u != NULL)
rtpp_log_write(RTPP_LOG_ERR, spa->log, "must permit notification socket with -n");
if (spa->timeout_data.notify_tag != NULL) {
free(spa->timeout_data.notify_tag);
spa->timeout_data.notify_tag = NULL;
}
if (cf->timeout_handler != NULL && socket_name_u != NULL) {
if (strcmp(cf->timeout_handler->socket_name, socket_name_u) != 0) {
rtpp_log_write(RTPP_LOG_ERR, spa->log, "invalid socket name %s", socket_name_u);
socket_name_u = NULL;
} else {
rtpp_log_write(RTPP_LOG_INFO, spa->log, "setting timeout handler");
spa->timeout_data.handler = cf->timeout_handler;
spa->timeout_data.notify_tag = strdup(notify_tag);
}
} else if (socket_name_u == NULL && spa->timeout_data.handler != NULL) {
spa->timeout_data.handler = NULL;
rtpp_log_write(RTPP_LOG_INFO, spa->log, "disabling timeout handler");
}
}
if (ia[0] != NULL && ia[1] != NULL) {
if (spa->addr[pidx] != NULL)
spa->last_update[pidx] = dtime;
if (spa->rtcp->addr[pidx] != NULL)
spa->rtcp->last_update[pidx] = dtime;
/*
* Unless the address provided by client historically
* cannot be trusted and address is different from one
* that we recorded update it.
*/
if (spa->untrusted_addr[pidx] == 0 && !(spa->addr[pidx] != NULL &&
SA_LEN(ia[0]) == SA_LEN(spa->addr[pidx]) &&
memcmp(ia[0], spa->addr[pidx], SA_LEN(ia[0])) == 0)) {
rtpp_log_write(RTPP_LOG_INFO, spa->log, "pre-filling %s's address "
"with %s:%s", (pidx == 0) ? "callee" : "caller", addr, port);
if (spa->addr[pidx] != NULL) {
if (spa->canupdate[pidx] == 0) {
if (spa->prev_addr[pidx] != NULL)
free(spa->prev_addr[pidx]);
spa->prev_addr[pidx] = spa->addr[pidx];
} else {
free(spa->addr[pidx]);
}
}
spa->addr[pidx] = ia[0];