/*
* @in1 buffer = hep + sip
* @in2 buffer length
* @in3 version - needed to make the difference betwen 3 and the first 2 protos
* @out1 structure containing hep details + headers | see hep.h
*/
int unpack_hep(char *buf, int len, int version, struct hep_desc* h)
{
int err;
if (version == 3)
err = unpack_hepv3(buf, len, h);
else
err = unpack_hepv2(buf, len, h);
return err;
}
static int hep_udp_read_req(struct socket_info *si, int* bytes_read)
{
struct receive_info ri;
int len;
#ifdef DYN_BUF
char* buf;
#else
static char buf [BUF_SIZE+1];
#endif
char *tmp;
unsigned int fromlen;
str msg;
struct hep_desc h;
int ret = 0;
#ifdef DYN_BUF
buf=pkg_malloc(BUF_SIZE+1);
if (buf==0){
LM_ERR("could not allocate receive buffer\n");
goto error;
}
#endif
fromlen=sockaddru_len(si->su);
len=recvfrom(bind_address->socket, buf, BUF_SIZE,0,&ri.src_su.s,&fromlen);
if (len==-1){
if (errno==EAGAIN)
return 0;
if ((errno==EINTR)||(errno==EWOULDBLOCK)|| (errno==ECONNREFUSED))
return -1;
LM_ERR("recvfrom:[%d] %s\n", errno, strerror(errno));
return -2;
}
if (len<MIN_UDP_PACKET) {
LM_DBG("probing packet received len = %d\n", len);
return 0;
}
/* we must 0-term the messages, receive_msg expects it */
buf[len]=0; /* no need to save the previous char */
ri.bind_address = si;
ri.dst_port = si->port_no;
ri.dst_ip = si->address;
ri.proto = si->proto;
ri.proto_reserved1 = ri.proto_reserved2 = 0;
su2ip_addr(&ri.src_ip, &ri.src_su);
ri.src_port=su_getport(&ri.src_su);
msg.s = buf;
msg.len = len;
/* if udp we are sure that version 1 or 2 of the
* protocol is used */
if (unpack_hepv2(buf, len, &h)) {
LM_ERR("hep unpacking failed\n");
return -1;
}
/* run hep callbacks if looks like non-SIP message*/
if( !isalpha(msg.s[0]) ) { /* not-SIP related */
ret=run_hep_cbs(&h, &ri);
if (ret < 0) {
LM_ERR("failed to run hep callbacks\n");
return -1;
}
/* remove the hep header; leave only the payload */
memmove(buf, h.u.hepv12.payload,
/* also copy '\0' character */
strlen(h.u.hepv12.payload)+1);
msg.s = buf;
msg.len = strlen(buf);
}
if (ri.src_port==0){
tmp=ip_addr2a(&ri.src_ip);
LM_INFO("dropping 0 port packet for %s\n", tmp);
return 0;
}
if (ret != HEP_SCRIPT_SKIP) {
/* receive_msg must free buf too!*/
receive_msg( msg.s, msg.len, &ri);
}
return 0;
}