/* osi_NetSend
*
* Return codes:
* 0 = success
* non-zero = failure
*/
int
osi_NetSend(osi_socket sop, struct sockaddr_in *to, struct iovec *iovec,
int iovcnt, afs_int32 size, int istack)
{
struct msghdr msg;
int code;
#ifdef ADAPT_PMTU
int sockerr;
int esize;
while (1) {
sockerr=0;
esize = sizeof(sockerr);
kernel_getsockopt(sop, SOL_SOCKET, SO_ERROR, (char *)&sockerr, &esize);
if (sockerr == 0)
break;
handle_socket_error(sop);
}
#endif
msg.msg_name = to;
msg.msg_namelen = sizeof(*to);
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_flags = 0;
code = kernel_sendmsg(sop, &msg, (struct kvec *) iovec, iovcnt, size);
return (code < 0) ? code : 0;
}
int
ksocknal_lib_get_conn_tunables (ksock_conn_t *conn, int *txmem, int *rxmem, int *nagle)
{
struct socket *sock = conn->ksnc_sock;
int len;
int rc;
rc = ksocknal_connsock_addref(conn);
if (rc != 0) {
LASSERT (conn->ksnc_closing);
*txmem = *rxmem = *nagle = 0;
return (-ESHUTDOWN);
}
rc = lnet_sock_getbuf(sock, txmem, rxmem);
if (rc == 0) {
len = sizeof(*nagle);
rc = kernel_getsockopt(sock, SOL_TCP, TCP_NODELAY,
(char *)nagle, &len);
}
ksocknal_connsock_decref(conn);
if (rc == 0)
*nagle = !*nagle;
else
*txmem = *rxmem = *nagle = 0;
return (rc);
}
int
osi_NetReceive(osi_socket so, struct sockaddr_in *from, struct iovec *iov,
int iovcnt, int *lengthp)
{
struct msghdr msg;
int code;
#ifdef ADAPT_PMTU
int sockerr;
int esize;
#endif
struct iovec tmpvec[RX_MAXWVECS + 2];
struct socket *sop = (struct socket *)so;
if (iovcnt > RX_MAXWVECS + 2) {
osi_Panic("Too many (%d) iovecs passed to osi_NetReceive\n", iovcnt);
}
#ifdef ADAPT_PMTU
while (1) {
sockerr=0;
esize = sizeof(sockerr);
kernel_getsockopt(sop, SOL_SOCKET, SO_ERROR, (char *)&sockerr, &esize);
if (sockerr == 0)
break;
handle_socket_error(so);
}
#endif
memcpy(tmpvec, iov, iovcnt * sizeof(struct iovec));
msg.msg_name = from;
msg.msg_iov = tmpvec;
msg.msg_iovlen = iovcnt;
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_flags = 0;
code = kernel_recvmsg(sop, &msg, (struct kvec *)tmpvec, iovcnt,
*lengthp, 0);
if (code < 0) {
afs_try_to_freeze();
/* Clear the error before using the socket again.
* Oh joy, Linux has hidden header files as well. It appears we can
* simply call again and have it clear itself via sock_error().
*/
flush_signals(current); /* We don't want no stinkin' signals. */
rxk_lastSocketError = code;
rxk_nSocketErrors++;
} else {
*lengthp = code;
code = 0;
}
return code;
}
