int main(int argc, char **argv)
{
int ret;
int session_id;
plan_tests(NUM_TESTS);
diag("Live unit tests");
ret = connect_viewer("localhost");
ok(ret == 0, "Connect viewer to relayd");
ret = establish_connection();
ok(ret == 0, "Established connection and version check with %d.%d",
VERSION_MAJOR, VERSION_MINOR);
ret = list_sessions(&session_id);
ok(ret > 0, "List sessions : %d session(s)", ret);
ret = attach_session(session_id);
ok(ret > 0, "Attach to session, %d streams received", ret);
ret = get_metadata();
ok(ret > 0, "Get metadata, received %d bytes", ret);
ret = get_next_index();
ok(ret == 0, "Get one index per stream");
ret = get_data_packet(first_packet_stream_id, first_packet_offset,
first_packet_len);
ok(ret == first_packet_len,
"Get one data packet for stream %d, offset %d, len %d",
first_packet_stream_id, first_packet_offset,
first_packet_len);
return exit_status();
}
void process_input_packet(int fd,
int afi,
int tun_receive_fd)
{
uint8_t *packet = NULL;
int length = 0;
uint8_t ttl = 0;
uint8_t tos = 0;
struct lisphdr *lisp_hdr = NULL;
struct iphdr *iph = NULL;
struct ip6_hdr *ip6h = NULL;
struct udphdr *udph = NULL;
if ((packet = (uint8_t *) malloc(MAX_IP_PACKET))==NULL){
lispd_log_msg(LISP_LOG_ERR,"process_input_packet: Couldn't allocate space for packet: %s", strerror(errno));
return;
}
memset(packet,0,MAX_IP_PACKET);
if (get_data_packet (fd,
afi,
packet,
&length,
&ttl,
&tos) == BAD){
lispd_log_msg(LISP_LOG_DEBUG_2,"process_input_packet: get_data_packet error: %s", strerror(errno));
free(packet);
return;
}
if(afi == AF_INET){
/* With input RAW UDP sockets in IPv4, we get the whole external IPv4 packet */
udph = (struct udphdr *) CO(packet,sizeof(struct iphdr));
}else{
/* With input RAW UDP sockets in IPv6, we get the whole external UDP packet */
udph = (struct udphdr *) packet;
}
/* With input RAW UDP sockets, we receive all UDP packets, we only want lisp data ones */
if(ntohs(udph->dest) != LISP_DATA_PORT){
free(packet);
//lispd_log_msg(LISP_LOG_DEBUG_3,"INPUT (No LISP data): UDP dest: %d ",ntohs(udph->dest));
return;
}
lisp_hdr = (struct lisphdr *) CO(udph,sizeof(struct udphdr));
length = length - sizeof(struct udphdr) - sizeof(struct lisphdr);
iph = (struct iphdr *) CO(lisp_hdr,sizeof(struct lisphdr));
lispd_log_msg(LISP_LOG_DEBUG_3,"INPUT (4341): Inner src: %s | Inner dst: %s ",
get_char_from_lisp_addr_t(extract_src_addr_from_packet((char *)iph)),
get_char_from_lisp_addr_t(extract_dst_addr_from_packet((char *)iph)));
if (iph->version == 4) {
if(ttl!=0){ /*XXX It seems that there is a bug in uClibc that causes ttl=0 in OpenWRT. This is a quick workaround */
iph->ttl = ttl;
}
iph->tos = tos;
/* We need to recompute the checksum since we have changed the TTL and TOS header fields */
iph->check = 0; /* New checksum must be computed with the checksum header field with 0s */
iph->check = ip_checksum((uint16_t*) iph, sizeof(struct iphdr));
}else{
ip6h = ( struct ip6_hdr *) iph;
if(ttl!=0){ /*XXX It seems that there is a bug in uClibc that causes ttl=0 in OpenWRT. This is a quick workaround */
ip6h->ip6_hops = ttl; /* ttl = Hops limit in IPv6 */
}
IPV6_SET_TC(ip6h,tos); /* tos = Traffic class field in IPv6 */
}
if ((write(tun_receive_fd, iph, length)) < 0){
lispd_log_msg(LISP_LOG_DEBUG_2,"lisp_input: write error: %s\n ", strerror(errno));
}
free(packet);
}
