/**
* bin_send - computes the checksum of the current packet and then
* sends the packet over UDP to the @dest destination
*
* @return: number of bytes sent, or -1 on error
*/
int bin_send(union sockaddr_union *dest)
{
int rc, destlen;
str st;
if (!dest)
return 0;
st.s = send_buffer + HEADER_SIZE;
st.len = bin_send_size - HEADER_SIZE;
/* compute a checksum of the binary packet content */
crc32_uint(&st, (unsigned int *)(send_buffer + BIN_PACKET_MARKER_SIZE));
LM_DBG("sending packet {'%.*s', %d}: %.*s [%d B] from socket %d\n",
*(int *)(send_buffer + HEADER_SIZE), send_buffer + HEADER_SIZE +
LEN_FIELD_SIZE, bin_send_type, bin_send_size, send_buffer, bin_send_size,
bin->socket);
destlen=sockaddru_len(*dest);
again:
rc=sendto(bin->socket, send_buffer, bin_send_size, 0, &dest->s, destlen);
if (rc==-1){
if (errno==EINTR) goto again;
LM_ERR("sendto() failed with %s(%d)\n", strerror(errno),errno);
}
return rc;
}
static int has_valid_checksum(char *buf, int len)
{
unsigned int crc, real_crc;
str st;
crc = *(unsigned int *)(buf + BIN_PACKET_MARKER_SIZE);
st.s = buf + HEADER_SIZE;
st.len = len - HEADER_SIZE;
crc32_uint(&st, &real_crc);
return crc == real_crc;
}
static int compute_id(str* first, str* second){
unsigned int crc32_val;
#define BUF_MAXSIZE 1024
char aux[BUF_MAXSIZE];
str tmp;
if(!first){
LM_ERR("Null first parameter received\n");
return -1;
}
if(use_domain){
//compute crc32(user@domain)
LM_DBG("XDBGX: compute_id HAS second key : %.*s", first->len, first->s);
if(!second){
LM_ERR("Null second parameter received and use_domain set to true\n");
return -1;
}
tmp.len = first->len + second->len + 1;
if( tmp.len > BUF_MAXSIZE - 1 ){
LM_ERR("Very long user or domain\n");
return -1;
}
memcpy(aux, first->s, first->len);
aux[first->len] = '@';
memcpy(aux + first->len + 1, second->s, second->len);
tmp.s = aux;
crc32_uint(&tmp, &crc32_val);
return crc32_val % max_loc_nr + 1;
}else{
crc32_uint(first, &crc32_val);
LM_DBG("crc32 for %.*s is %u\n", first->len, first->s, crc32_val);
return crc32_val % max_loc_nr + 1;
}
}
int hash_func (struct sip_msg * msg,
enum hash_source source, int denominator) {
int ret;
unsigned int hash;
str source_string;
if(determine_source (msg, source, &source_string) == -1) {
return -1;
}
crc32_uint(&source_string, &hash);
ret = hash % denominator;
LM_DBG("hash: %u %% %i = %i\n", hash, denominator, ret);
return ret;
}
int hash_func(struct _sipcapture_object *sco, enum hash_source source,
int denominator)
{
int ret;
unsigned int hash;
str source_string;
if(get_source(sco, source, &source_string) == -1) {
return -1;
}
LM_DBG("source string: [%.*s]\n", source_string.len, source_string.s);
crc32_uint(&source_string, &hash);
ret = hash % denominator;
return ret;
}