Hi,
I have a need to modify SIPp to support multiple remote destinations in UAC
mode. The idea being to supply additional hosts to SIPp, which are stored in
an array of remote_hosts[], and then each successive call does a round robin to
the next host in the array. A new variable in the call class stores the index
to the socket array that is used by that call's destination. The goal is to
test a N-wide server setup, where launching N instances of SIPp becomes
unwieldy for the operator.
I've done some of this work, but have a few areas of code in sipp.c that I'm
not familiar with, and I'm hoping someone can shed some light:
Issue #1: recv_message in sipp.c makes a call to send_message, which supplies
a socket. The send is in a conditional block like thus:
if((pollfiles[(*poll_idx)].revents & POLLOUT) != 0 ) {
...
if (pending_msg[(*poll_idx)] != NULL)
{
char * VP_tmp = strdup(pending_msg[(*poll_idx)]);
free(pending_msg[(*poll_idx)]);
pending_msg[(*poll_idx)] = NULL;
send_message(pollfiles[(*poll_idx)].fd, NULL, VP_tmp, 0);
free(VP_tmp);
}
Can someone enlighten me on what pollfiles is? This looks like a way to send
messages that have already been queued up by the call somewhere. If using a
call based socket - how would I go about identifying the call instance involved
in the pending message?
Issue #2: This code accepts an incoming TCP connection request.
if(s == main_socket) {
/* New incoming connection */
sipp_socklen_t len = SOCK_ADDR_SIZE(&remote_sockaddr);
int new_sock = accept(s,(sockaddr *)(void *)&remote_sockaddr,&len);
My assumption is that this will only be executed during UAS mode, since UAC
mode initiates all his socket connections?
Issue #3: decompress_if_needed which is called by recv_message uses a sock. At
this point in recv_message, I've no idea what's being done. Can someone speak
intelligently about what the code surrounding decompress_if_needed does?
I'd appreciate any pointers.
Thanks
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