static int
UseMediaProxy(struct sip_msg* msg, char* str1, char* str2)
{
str sdp, sessionIP, callId, fromDomain, toDomain, userAgent, tokens[64];
str fromAddr, toAddr, fromTag, toTag;
char *clientIP, *ptr, *command, *result, *agent, *fromType, *toType, *info;
int streamCount, i, port, count, portCount, cmdlen, infolen, success, type;
StreamInfo streams[64], stream;
Bool request;
if (msg->first_line.type == SIP_REQUEST) {
if (msg->first_line.u.request.method_value == METHOD_INVITE)
type = MSG_INVITE;
else if (msg->first_line.u.request.method_value == METHOD_ACK)
type = MSG_ACK;
else
type = MSG_UNKNOWN;
} else if (msg->first_line.type == SIP_REPLY) {
type = MSG_REPLY;
} else {
type = MSG_UNKNOWN;
}
if (type==MSG_INVITE || type==MSG_ACK) {
request = True;
} else if (type==MSG_REPLY) {
request = False;
} else {
return -1;
}
if (!getCallId(msg, &callId)) {
LOG(L_ERR, "error: use_media_proxy(): can't get Call-Id\n");
return -1;
}
success = getSDPMessage(msg, &sdp);
if (success==0 && type==MSG_ACK) {
return 1; // nothing to do. it's ok for ACK to not have a SDP body
} else if (success <= 0) {
LOG(L_ERR, "error: use_media_proxy(): failed to get the SDP message\n");
return -1;
}
if (!getSessionLevelMediaIP(&sdp, &sessionIP)) {
LOG(L_ERR, "error: use_media_proxy(): error parsing the SDP message\n");
return -1;
}
streamCount = getMediaStreams(&sdp, &sessionIP, streams, 64);
if (streamCount == -1) {
LOG(L_ERR, "error: use_media_proxy(): can't extract media streams "
"from the SDP message\n");
return -1;
}
if (streamCount == 0) {
// there are no media streams. we have nothing to do.
return 1;
}
fromDomain = getFromDomain(&fromType, msg);
fromAddr = getFromAddress(msg);
toAddr = getToAddress(msg);
fromTag = getFromTag(msg);
toTag = getToTag(msg);
userAgent = getUserAgent(msg);
if (request) {
toDomain = getDestinationDomain(&toType, msg); // call only for requests
} else {
toDomain = getToDomain(&toType, msg);
}
clientIP = ip_addr2a(&msg->rcv.src_ip);
infolen = fromAddr.len + toAddr.len + fromTag.len + toTag.len + 64;
cmdlen = callId.len + strlen(clientIP) + fromDomain.len + toDomain.len +
userAgent.len*3 + infolen + 128;
for (i=0; i<streamCount; i++) {
stream = streams[i];
cmdlen += stream.ip.len + stream.port.len + stream.type.len + 4;
}
command = pkg_malloc(cmdlen);
if (!command) {
LOG(L_ERR, "error: use_media_proxy(): out of memory\n");
return -1;
}
if (request)
count = sprintf(command, "request %.*s", callId.len, callId.s);
else
count = sprintf(command, "lookup %.*s", callId.len, callId.s);
for (i=0, ptr=command+count; i<streamCount; i++) {
char c = (i==0 ? ' ' : ',');
count = sprintf(ptr, "%c%.*s:%.*s:%.*s", c,
streams[i].ip.len, streams[i].ip.s,
streams[i].port.len, streams[i].port.s,
streams[i].type.len, streams[i].type.s);
ptr += count;
}
agent = encodeQuopri(userAgent);
if (!agent) {
LOG(L_ERR, "error: use_media_proxy(): out of memory\n");
pkg_free(command);
return -1;
}
info = pkg_malloc(infolen);
if (!info) {
LOG(L_ERR, "error: use_media_proxy(): out of memory\n");
pkg_free(command);
pkg_free(agent);
return -1;
}
sprintf(info, "from:%.*s,to:%.*s,fromtag:%.*s,totag:%.*s",
fromAddr.len, fromAddr.s, toAddr.len, toAddr.s,
fromTag.len, fromTag.s, toTag.len, toTag.s);
if (isRTPAsymmetric(userAgent)) {
strcat(info, ",asymmetric");
}
snprintf(ptr, command + cmdlen - ptr, " %s %.*s %s %.*s %s %s info=%s\n",
clientIP, fromDomain.len, fromDomain.s, fromType,
toDomain.len, toDomain.s, toType, agent, info);
pkg_free(info);
pkg_free(agent);
result = sendMediaproxyCommand(command);
pkg_free(command);
if (result == NULL)
return -1;
count = getTokens(result, tokens, sizeof(tokens)/sizeof(str));
if (count == 0) {
LOG(L_ERR, "error: use_media_proxy(): empty response from mediaproxy\n");
return -1;
} else if (count<streamCount+1) {
if (request) {
LOG(L_ERR, "error: use_media_proxy(): insufficient ports returned "
"from mediaproxy: got %d, expected %d\n", count-1, streamCount);
return -1;
} else {
LOG(L_WARN, "warning: use_media_proxy(): broken client. Called UA "
"added extra media stream(s) in the OK reply\n");
}
}
if (sessionIP.s && !isAnyAddress(sessionIP)) {
success = replaceElement(msg, &sessionIP, &tokens[0]);
if (!success) {
LOG(L_ERR, "error: use_media_proxy(): failed to replace "
"session-level media IP in SDP body\n");
return -1;
}
}
portCount = min(count-1, streamCount);
for (i=0; i<portCount; i++) {
// check. is this really necessary?
port = strtoint(&tokens[i+1]);
if (port <= 0 || port > 65535) {
LOG(L_ERR, "error: use_media_proxy(): invalid port returned "
"by mediaproxy: %.*s\n", tokens[i+1].len, tokens[i+1].s);
//return -1;
continue;
}
if (streams[i].port.len!=1 || streams[i].port.s[0]!='0') {
success = replaceElement(msg, &(streams[i].port), &tokens[i+1]);
if (!success) {
LOG(L_ERR, "error: use_media_proxy(): failed to replace "
"port in media stream nr. %d\n", i+1);
return -1;
}
}
if (streams[i].localIP && !isAnyAddress(streams[i].ip)) {
success = replaceElement(msg, &(streams[i].ip), &tokens[0]);
if (!success) {
LOG(L_ERR, "error: use_media_proxy(): failed to replace "
"IP address in media stream nr. %d\n", i+1);
return -1;
}
}
}
return 1;
}
static int
UseMediaProxy(struct sip_msg* msg, char* str1, char* str2)
{
str sdp, sessionIP, signalingIP, callId, userAgent, tokens[64];
str fromDomain, toDomain, fromAddr, toAddr, fromTag, toTag, domain;
char *ptr, *command, *result, *agent, *fromType, *toType, *info;
int streamCount, i, port, count, portCount, cmdlen, infolen, status;
StreamInfo streams[64], stream;
Bool request;
if (msg->first_line.type == SIP_REQUEST) {
request = True;
} else if (msg->first_line.type == SIP_REPLY) {
request = False;
} else {
return -1;
}
if (!getCallId(msg, &callId)) {
LM_ERR("can't get Call-Id\n");
return -1;
}
status = getSDPMessage(msg, &sdp);
// status = -1 is error, -2 is missing SDP body
if (status < 0)
return status;
if (!getSessionLevelMediaIP(&sdp, &sessionIP)) {
LM_ERR("failed to parse the SDP message\n");
return -1;
}
streamCount = getMediaStreams(&sdp, &sessionIP, streams, 64);
if (streamCount == -1) {
LM_ERR("can't extract media streams from the SDP message\n");
return -1;
}
if (streamCount == 0)
return 1; // there are no media streams. we have nothing to do.
fromDomain = getFromDomain(msg);
fromType = (isFromLocal(msg, NULL, NULL)>0) ? "local" : "remote";
fromAddr = getFromAddress(msg);
toAddr = getToAddress(msg);
fromTag = getFromTag(msg);
toTag = getToTag(msg);
userAgent = getUserAgent(msg);
if (request) {
toDomain = getDestinationDomain(msg); // call only for requests
toType = (isDestinationLocal(msg, NULL, NULL)>0) ? "local" : "remote";
} else {
toDomain.s = "unknown";
toDomain.len = 7;
toType = "unknown";
}
signalingIP = getSignalingIP(msg);
domain = getMediaproxyDomain(msg);
infolen = fromAddr.len + toAddr.len + fromTag.len + toTag.len +
domain.len + 64;
cmdlen = callId.len + signalingIP.len + fromDomain.len + toDomain.len +
userAgent.len*3 + infolen + 128;
for (i=0; i<streamCount; i++) {
stream = streams[i];
cmdlen += stream.ip.len + stream.port.len + stream.type.len + 4;
}
command = pkg_malloc(cmdlen);
if (!command) {
LM_ERR("out of memory\n");
return -1;
}
if (request)
count = sprintf(command, "request %.*s", callId.len, callId.s);
else
count = sprintf(command, "lookup %.*s", callId.len, callId.s);
for (i=0, ptr=command+count; i<streamCount; i++) {
char c = (i==0 ? ' ' : ',');
count = sprintf(ptr, "%c%.*s:%.*s:%.*s", c,
streams[i].ip.len, streams[i].ip.s,
streams[i].port.len, streams[i].port.s,
streams[i].type.len, streams[i].type.s);
ptr += count;
}
agent = encodeQuopri(userAgent);
if (!agent) {
LM_ERR("out of memory\n");
pkg_free(command);
return -1;
}
info = pkg_malloc(infolen);
if (!info) {
LM_ERR("out of memory\n");
pkg_free(command);
pkg_free(agent);
return -1;
}
sprintf(info, "from:%.*s,to:%.*s,fromtag:%.*s,totag:%.*s",
fromAddr.len, fromAddr.s, toAddr.len, toAddr.s,
fromTag.len, fromTag.s, toTag.len, toTag.s);
if (domain.len) {
strcat(info, ",domain:");
strncat(info, domain.s, domain.len);
}
if (isRTPAsymmetric(userAgent)) {
strcat(info, ",asymmetric");
}
snprintf(ptr, command + cmdlen - ptr, " %.*s %.*s %s %.*s %s %s info=%s\n",
signalingIP.len, signalingIP.s, fromDomain.len, fromDomain.s,
fromType, toDomain.len, toDomain.s, toType, agent, info);
pkg_free(info);
pkg_free(agent);
result = sendMediaproxyCommand(command);
pkg_free(command);
if (result == NULL)
return -1;
count = getTokens(result, tokens, sizeof(tokens)/sizeof(str));
if (count == 0) {
LM_ERR("empty response from mediaproxy\n");
return -1;
} else if (count<streamCount+1) {
if (request) {
LM_ERR("insufficient ports returned from mediaproxy: got %d, "
"expected %d\n", count-1, streamCount);
return -1;
} else {
LM_WARN("broken client. Called UA added extra media stream(s) "
"in the OK reply\n");
}
}
if (sessionIP.s && !isAnyAddress(sessionIP)) {
if (!replaceElement(msg, &sessionIP, &tokens[0])) {
LM_ERR("failed to replace session-level media IP in the SDP body\n");
return -1;
}
}
portCount = min(count-1, streamCount);
for (i=0; i<portCount; i++) {
// check. is this really necessary?
port = strtoint(&tokens[i+1]);
if (port <= 0 || port > 65535) {
LM_ERR("invalid port returned by mediaproxy: %.*s\n",
tokens[i+1].len, tokens[i+1].s);
//return -1;
continue;
}
if (streams[i].port.len!=1 || streams[i].port.s[0]!='0') {
if (!replaceElement(msg, &(streams[i].port), &tokens[i+1])) {
LM_ERR("failed to replace port in media stream number %d\n", i+1);
return -1;
}
}
if (streams[i].localIP && !isAnyAddress(streams[i].ip)) {
if (!replaceElement(msg, &(streams[i].ip), &tokens[0])) {
LM_ERR("failed to replace IP address in media stream number %d\n", i+1);
return -1;
}
}
}
return 1;
}
