Squid internals

The Helper API (src/helper.c) (ctd.)
How it is used
Create a helper set
hset = helperCreate("helper process set");
Set the redirector type
hset->cmdline = "commandline";
hset->n_to_start = number_to_start;
hset->ipc_type = IPC_TCP_SOCKET;
Open the servers
helperOpenServers(hset);
Submit a request
helperSubmit(hset, buf, callback, callbackdata);
/* Note that buf is a NULL-terminated string */
The reply is given to callback
void helper_callback(void *callbackdata, char *reply);
/* Note that reply is a NULL-terminated string */
Shut down the helper set
helperShutdown(hset);
helperFree(hset);