/*udp write process*/
int udp_write(struct peer *peer){
struct stream *s;
int num;
int count =0;
int writenum;
//get first stream;
s = misaka_write_packet (peer->obuf);
if (!s)
return 0;
/* udp Nonblocking write */
do
{
/* Number of bytes to be sent. */
writenum = stream_get_endp (s) - stream_get_getp (s);
/* Call write() system call.*/
num = sendto(peer->fd, STREAM_PNT (s), writenum, \
0, (struct sockaddr*)&s->dsu.sin, sizeof(struct sockaddr));
if (num < 0)
{
}
if (num != writenum)
{
}
/*OK we send packet so delete packet. */
misaka_packet_delete (peer->obuf);
}while (++count < MISAKA_WRITE_PACKET_MAX && (s = misaka_write_packet (peer->obuf)) != NULL);
return count;
}
int ppp_tcp_write (struct thread *thread)
{
struct ppp_mcp_sock *peer;
struct stream *stream;
int num;
int write_errno;
int val, writenum;
/* Yes first of all get peer pointer. */
peer = THREAD_ARG (thread);
peer->t_write = NULL;
if (peer->fd < 0)
{
PPPD_DEBUG_TCP("write: peer's fd is negative value %d", peer->fd);
return -1;
}
if(peer->connect_status != CLIENT_CONNECT_SERVER_OK)
return -1;
while (1)
{
stream = stream_fifo_head(peer->obuf);
if (stream == NULL)
return 0;
val = fcntl (peer->fd, F_GETFL, 0);
fcntl (peer->fd, F_SETFL, val | O_NONBLOCK);
/* Number of bytes to be sent. */
writenum = stream_get_endp (stream) - stream_get_getp (stream);
/* Call write() system call. */
num = write (peer->fd, STREAM_PNT (stream), writenum);
write_errno = errno;
fcntl (peer->fd, F_SETFL, val);
if (num < 0)
{
if (write_errno == EWOULDBLOCK || write_errno == EAGAIN || write_errno == EINTR)
break;
PPPD_DEBUG_TCP("erro,write packet to peer:%s, fd:%u", peer->hostname, peer->fd);
ppp_connect_mcp_error_deal(peer);
return 0;
}
/*发送了数据之后，推迟保活定时器*/
if(num > 0)
pppd_postpone_keepalive_timer(peer);
if (num != writenum) {
stream_forward_getp(stream, num);
break;
} else
stream_free(stream_fifo_pop (peer->obuf));
break;
}
if(stream_fifo_head (peer->obuf))
MCP_WRITE_ON (peer->t_write, ppp_tcp_write, peer, peer->fd);
return 0;
}
