int
isis_recv_pdu_p2p (struct isis_circuit *circuit, u_char * ssnpa)
{
int bytesread, addr_len;
struct sockaddr_ll s_addr;
memset (&s_addr, 0, sizeof (struct sockaddr_ll));
addr_len = sizeof (s_addr);
/* we can read directly to the stream */
bytesread = stream_recvfrom (circuit->rcv_stream, circuit->fd,
circuit->interface->mtu, 0,
(struct sockaddr *) &s_addr,
(socklen_t *) &addr_len);
if (s_addr.sll_pkttype == PACKET_OUTGOING)
{
/* Read the packet into discard buff */
bytesread = recvfrom (circuit->fd, discard_buff, sizeof (discard_buff),
MSG_DONTWAIT, (struct sockaddr *) &s_addr,
(socklen_t *) &addr_len);
if (bytesread < 0)
zlog_warn ("isis_recv_pdu_p2p(): recvfrom() failed");
return ISIS_WARNING;
}
/* If we don't have protocol type 0x00FE which is
* ISO over GRE we exit with pain :)
*/
if (ntohs (s_addr.sll_protocol) != 0x00FE)
{
zlog_warn ("isis_recv_pdu_p2p(): protocol mismatch(): %X",
ntohs (s_addr.sll_protocol));
return ISIS_WARNING;
}
memcpy (ssnpa, &s_addr.sll_addr, s_addr.sll_halen);
return ISIS_OK;
}
//start read packet, 0 one packet, 1 read again, 2 full, -1 error
int udp_read(struct peer* peer)
{
struct peer *vpeer, *tpeer;
int nbytes;
int type;
int src;
int dst;
int readsize;
union sockunion su;
struct sockaddr_in sin;
int len;
int ret;
struct stream *s; //replay packet
int tcpid;
struct stream *rs;
struct stream ss;
/* Read packet header to determine type of the packet */
//if (peer->packet_size == 0)
peer->packet_size = MISAKA_MAX_PACKET_SIZE;
sin = peer->dsu.sin;
len = sizeof(struct sockaddr);
nbytes = stream_recvfrom (peer->ibuf, peer->fd, peer->packet_size, 0, (struct sockaddr*)&sin, &len);
peer->ibuf->su.sin = sin;
/* If read byte is smaller than zero then error occured. */
if (nbytes < 0)
{
}
return IO_CHECK; //0 get one packet
}
