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/* $OpenBSD: listen.c,v 1.8 2009/02/04 20:35:14 ratchov Exp $ */
/*
* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "conf.h"
#include "sock.h"
#include "listen.h"
struct fileops listen_ops = {
"listen",
sizeof(struct listen),
listen_close,
NULL, /* read */
NULL, /* write */
NULL, /* start */
NULL, /* stop */
listen_nfds,
listen_pollfd,
listen_revents
};
struct listen *
listen_new(struct fileops *ops, char *path,
struct aparams *wpar, struct aparams *rpar, int maxweight)
{
int sock, oldumask;
struct sockaddr_un sockname;
struct listen *f;
sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (sock < 0) {
perror("socket");
return NULL;
}
if (unlink(path) < 0 && errno != ENOENT) {
perror("unlink");
goto bad_close;
}
sockname.sun_family = AF_UNIX;
strlcpy(sockname.sun_path, path, sizeof(sockname.sun_path));
oldumask = umask(0111);
if (bind(sock, (struct sockaddr *)&sockname,
sizeof(struct sockaddr_un)) < 0) {
perror("bind");
goto bad_close;
}
umask(oldumask);
if (listen(sock, 1) < 0) {
perror("listen");
goto bad_close;
}
f = (struct listen *)file_new(ops, path, 1);
if (f == NULL)
goto bad_close;
f->path = strdup(path);
if (f->path == NULL) {
perror("strdup");
exit(1);
}
f->fd = sock;
f->wpar = *wpar;
f->rpar = *rpar;
f->maxweight = maxweight;
#ifdef DEBUG
if (debug_level > 0) {
fprintf(stderr, "listen_new: %s: wpar=", f->path);
aparams_print(&f->wpar);
fprintf(stderr, ", rpar=");
aparams_print(&f->rpar);
fprintf(stderr, ", vol=%u\n", f->maxweight);
}
#endif
return f;
bad_close:
close(sock);
return NULL;
}
int
listen_nfds(struct file *f) {
return 1;
}
int
listen_pollfd(struct file *file, struct pollfd *pfd, int events)
{
struct listen *f = (struct listen *)file;
pfd->fd = f->fd;
pfd->events = POLLIN;
return 1;
}
int
listen_revents(struct file *file, struct pollfd *pfd)
{
struct listen *f = (struct listen *)file;
struct sockaddr caddr;
socklen_t caddrlen;
int sock;
if (pfd->revents & POLLIN) {
DPRINTF("listen_revents: %s: accepting connection\n", f->path);
caddrlen = sizeof(caddrlen);
sock = accept(f->fd, &caddr, &caddrlen);
if (sock < 0) {
perror("accept");
return 0;
}
if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0) {
perror("fcntl(sock, O_NONBLOCK)");
close(sock);
return 0;
}
if (sock_new(&sock_ops, sock, "socket",
&f->wpar, &f->rpar, f->maxweight) == NULL) {
close(sock);
return 0;
}
}
return 0;
}
void
listen_close(struct file *file)
{
struct listen *f = (struct listen *)file;
(void)unlink(f->path);
free(f->path);
(void)close(f->fd);
}
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