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/*
* Copyright (C) Igor Sysoev
* Copyright (C) NGINX, Inc.
*/
#include <nxt_main.h>
#include <nxt_socket_msg.h>
/*
* SOCK_SEQPACKET protocol is supported for AF_UNIX in Solaris 8 X/Open
* sockets, Linux 2.6.4, FreeBSD 9.0, NetBSD 6.0, and OpenBSD 5.0.
*/
/* SOCK_SEQPACKET is disabled to test SOCK_DGRAM on all platforms. */
#if (0 || NXT_HAVE_AF_UNIX_SOCK_SEQPACKET)
#define NXT_UNIX_SOCKET SOCK_SEQPACKET
#else
#define NXT_UNIX_SOCKET SOCK_DGRAM
#endif
nxt_int_t
nxt_socketpair_create(nxt_task_t *task, nxt_socket_t *pair)
{
if (nxt_slow_path(socketpair(AF_UNIX, NXT_UNIX_SOCKET, 0, pair) != 0)) {
nxt_alert(task, "socketpair() failed %E", nxt_errno);
return NXT_ERROR;
}
nxt_debug(task, "socketpair(): %d:%d", pair[0], pair[1]);
if (nxt_slow_path(nxt_socket_nonblocking(task, pair[0]) != NXT_OK)) {
goto fail;
}
if (nxt_slow_path(fcntl(pair[0], F_SETFD, FD_CLOEXEC) == -1)) {
goto fail;
}
if (nxt_slow_path(nxt_socket_nonblocking(task, pair[1]) != NXT_OK)) {
goto fail;
}
if (nxt_slow_path(fcntl(pair[1], F_SETFD, FD_CLOEXEC) == -1)) {
goto fail;
}
#if NXT_HAVE_SOCKOPT_SO_PASSCRED
int enable_creds = 1;
if (nxt_slow_path(setsockopt(pair[0], SOL_SOCKET, SO_PASSCRED,
&enable_creds, sizeof(enable_creds)) == -1))
{
nxt_alert(task, "failed to set SO_PASSCRED %E", nxt_errno);
goto fail;
}
if (nxt_slow_path(setsockopt(pair[1], SOL_SOCKET, SO_PASSCRED,
&enable_creds, sizeof(enable_creds)) == -1))
{
nxt_alert(task, "failed to set SO_PASSCRED %E", nxt_errno);
goto fail;
}
#endif
return NXT_OK;
fail:
nxt_socketpair_close(task, pair);
return NXT_ERROR;
}
void
nxt_socketpair_close(nxt_task_t *task, nxt_socket_t *pair)
{
nxt_socket_close(task, pair[0]);
nxt_socket_close(task, pair[1]);
}
ssize_t
nxt_socketpair_send(nxt_fd_event_t *ev, nxt_fd_t *fd, nxt_iobuf_t *iob,
nxt_uint_t niob)
{
ssize_t n;
nxt_err_t err;
nxt_send_oob_t oob;
nxt_socket_msg_oob_init(&oob, fd);
for ( ;; ) {
n = nxt_sendmsg(ev->fd, iob, niob, &oob);
err = (n == -1) ? nxt_socket_errno : 0;
nxt_debug(ev->task, "sendmsg(%d, %FD, %FD, %ui): %z", ev->fd, fd[0],
fd[1], niob, n);
if (n > 0) {
return n;
}
/* n == -1 */
switch (err) {
case NXT_EAGAIN:
nxt_debug(ev->task, "sendmsg(%d) not ready", ev->fd);
break;
/*
* Returned (at least on OSX) when trying to send many small messages.
*/
case NXT_ENOBUFS:
nxt_debug(ev->task, "sendmsg(%d) no buffers", ev->fd);
break;
case NXT_EINTR:
nxt_debug(ev->task, "sendmsg(%d) interrupted", ev->fd);
continue;
default:
nxt_alert(ev->task, "sendmsg(%d, %FD, %FD, %ui) failed %E",
ev->fd, fd[0], fd[1], niob, err);
return NXT_ERROR;
}
ev->write_ready = 0;
return NXT_AGAIN;
}
}
ssize_t
nxt_socketpair_recv(nxt_fd_event_t *ev, nxt_iobuf_t *iob, nxt_uint_t niob,
void *oob)
{
ssize_t n;
nxt_err_t err;
for ( ;; ) {
n = nxt_recvmsg(ev->fd, iob, niob, oob);
err = (n == -1) ? nxt_socket_errno : 0;
nxt_debug(ev->task, "recvmsg(%d, %ui, %uz): %z",
ev->fd, niob, ((nxt_recv_oob_t *) oob)->size, n);
if (n > 0) {
return n;
}
if (n == 0) {
ev->closed = 1;
ev->read_ready = 0;
return n;
}
/* n == -1 */
switch (err) {
case NXT_EAGAIN:
nxt_debug(ev->task, "recvmsg(%d) not ready", ev->fd);
ev->read_ready = 0;
return NXT_AGAIN;
case NXT_EINTR:
nxt_debug(ev->task, "recvmsg(%d) interrupted", ev->fd);
continue;
default:
nxt_alert(ev->task, "recvmsg(%d, %ui) failed %E",
ev->fd, niob, err);
return NXT_ERROR;
}
}
}
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