int cf_msg_logger::log(const char* buf, int len,
sockaddr_storage* src_ip,
sockaddr_storage* dst_ip,
cstring method, int reply_code)
{
string src = addr2str(src_ip);
string dst = addr2str(dst_ip);
AmLock _l(fd_mut);
write_src_dst(src);
write_src_dst(dst);
string what = c2stlstr(method);
if(reply_code > 0) {
what = int2str(reply_code) + " / " + what;
}
WRITE_CSTSTR("<call src='");
WRITE_STLSTR(src);
WRITE_CSTSTR("' dst='");
WRITE_STLSTR(dst);
WRITE_CSTSTR("' desc='");
WRITE_STLSTR(what);
WRITE_CSTSTR("'>\n");
if(write(buf,len) != len) return -1;
WRITE_CSTSTR("</call>\n");
return 0;
}
/**
* Computes, set and return the outbound interface
* based on remote_uri, next_hop_ip, outbound_proxy, route.
*/
int AmBasicSipDialog::getOutboundIf()
{
if (outbound_interface >= 0)
return outbound_interface;
if(AmConfig::SIP_Ifs.size() == 1){
return (outbound_interface = 0);
}
// Destination priority:
// 1. next_hop
// 2. outbound_proxy (if 1st req or force_outbound_proxy)
// 3. first route
// 4. remote URI
string dest_uri;
string dest_ip;
string local_ip;
multimap<string,unsigned short>::iterator if_it;
list<sip_destination> ip_list;
if(!next_hop.empty() &&
!parse_next_hop(stl2cstr(next_hop),ip_list) &&
!ip_list.empty()) {
dest_ip = c2stlstr(ip_list.front().host);
}
else if(!outbound_proxy.empty() &&
(remote_tag.empty() || force_outbound_proxy)) {
dest_uri = outbound_proxy;
}
else if(!route.empty()){
// parse first route
sip_header fr;
fr.value = stl2cstr(route);
sip_uri* route_uri = get_first_route_uri(&fr);
if(!route_uri){
ERROR("Could not parse route (local_tag='%s';route='%s')",
local_tag.c_str(),route.c_str());
goto error;
}
dest_ip = c2stlstr(route_uri->host);
}
else {
dest_uri = remote_uri;
}
if(dest_uri.empty() && dest_ip.empty()) {
ERROR("No destination found (local_tag='%s')",local_tag.c_str());
goto error;
}
if(!dest_uri.empty()){
sip_uri d_uri;
if(parse_uri(&d_uri,dest_uri.c_str(),dest_uri.length()) < 0){
ERROR("Could not parse destination URI (local_tag='%s';dest_uri='%s')",
local_tag.c_str(),dest_uri.c_str());
goto error;
}
dest_ip = c2stlstr(d_uri.host);
}
if(get_local_addr_for_dest(dest_ip,local_ip) < 0){
ERROR("No local address for dest '%s' (local_tag='%s')",dest_ip.c_str(),local_tag.c_str());
goto error;
}
if_it = AmConfig::LocalSIPIP2If.find(local_ip);
if(if_it == AmConfig::LocalSIPIP2If.end()){
ERROR("Could not find a local interface for resolved local IP (local_tag='%s';local_ip='%s')",
local_tag.c_str(), local_ip.c_str());
goto error;
}
setOutboundInterface(if_it->second);
return if_it->second;
error:
WARN("Error while computing outbound interface: default interface will be used instead.");
setOutboundInterface(0);
return 0;
}
//
// Ref. RFC 3261 "12.2.1.1 Generating the Request"
//
int trans_layer::set_next_hop(list<sip_header*>& route_hdrs,
cstring& r_uri,
sockaddr_storage* remote_ip)
{
string next_hop;
unsigned short next_port=0;
//assert(msg->type == SIP_REQUEST);
int err=0;
if(!route_hdrs.empty()){
sip_header* fr = route_hdrs.front();
sip_nameaddr na;
const char* c = fr->value.s;
if(parse_nameaddr(&na, &c, fr->value.len)<0) {
DBG("Parsing name-addr failed\n");
return -1;
}
if(parse_uri(&na.uri,na.addr.s,na.addr.len) < 0) {
DBG("Parsing route uri failed\n");
return -1;
}
bool is_lr = false;
if(!na.uri.params.empty()){
list<sip_avp*>::iterator it = na.uri.params.begin();
for(;it != na.uri.params.end(); it++){
if( ((*it)->name.len == 2) &&
(!memcmp((*it)->name.s,"lr",2)) ) {
is_lr = true;
break;
}
}
}
if (SipCtrlInterfaceFactory::outbound_host.empty()) {
next_hop = c2stlstr(na.uri.host);
next_port = na.uri.port;
} else {
next_hop = SipCtrlInterfaceFactory::outbound_host;
next_port = SipCtrlInterfaceFactory::outbound_port;
}
if(!is_lr){
// detect beginning of next route
enum {
RR_PARAMS=0,
RR_QUOTED,
RR_SEP_SWS, // space(s) after ','
RR_NXT_ROUTE
};
int st = RR_PARAMS;
const char* end = fr->value.s + fr->value.len;
for(;c<end;c++){
switch(st){
case RR_PARAMS:
switch(*c){
case SP:
case HTAB:
case CR:
case LF:
break;
case COMMA:
st = RR_SEP_SWS;
break;
case DQUOTE:
st = RR_QUOTED;
break;
}
break;
case RR_QUOTED:
switch(*c){
case BACKSLASH:
c++;
break;
case DQUOTE:
st = RR_PARAMS;
break;
}
break;
case RR_SEP_SWS:
switch(*c){
case SP:
case HTAB:
case CR:
case LF:
break;
default:
st = RR_NXT_ROUTE;
goto nxt_route;
}
break;
}
}
nxt_route:
switch(st){
case RR_QUOTED:
case RR_SEP_SWS:
DBG("Malformed first route header\n");
case RR_PARAMS:
// remove current route header from message
DBG("delete (fr=0x%p)\n",fr);
delete fr; // route_hdrs.front();
route_hdrs.pop_front();
DBG("route_hdrs.length() = %i\n",(int)route_hdrs.size());
break;
case RR_NXT_ROUTE:
// remove current route from this header
fr->value.s = c;
fr->value.len = end-c;
break;
}
// copy r_uri at the end of
// the route set.
route_hdrs.push_back(new sip_header(0,"Route",r_uri));
r_uri = na.addr;
}
}
else {
if (SipCtrlInterfaceFactory::outbound_host.empty()) {
sip_uri parsed_r_uri;
err = parse_uri(&parsed_r_uri,r_uri.s,r_uri.len);
if(err < 0){
ERROR("Invalid Request URI\n");
return -1;
}
next_hop = c2stlstr(parsed_r_uri.host);
next_port = parsed_r_uri.port;
} else {
next_hop = SipCtrlInterfaceFactory::outbound_host;
next_port = SipCtrlInterfaceFactory::outbound_port;
}
}
DBG("next_hop:next_port is <%s:%u>\n", next_hop.c_str(), next_port);
err = resolver::instance()->resolve_name(next_hop.c_str(),
remote_ip,IPv4,UDP);
if(err < 0){
ERROR("Unresolvable Request URI\n");
return -1;
}
((sockaddr_in*)remote_ip)->sin_port = htons(next_port);
return 0;
}