/*-
* Copyright (c) 1997 Brian Somers <brian@Awfulhak.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: server.c,v 1.22 1998/06/27 14:18:10 brian Exp $
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/un.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <termios.h>
#include <unistd.h>
#include "log.h"
#include "descriptor.h"
#include "server.h"
#include "id.h"
#include "prompt.h"
static int
server_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
{
struct server *s = descriptor2server(d);
struct prompt *p;
int sets;
sets = 0;
if (r && s->fd >= 0) {
if (*n < s->fd + 1)
*n = s->fd + 1;
FD_SET(s->fd, r);
log_Printf(LogTIMER, "server: fdset(r) %d\n", s->fd);
sets++;
}
for (p = log_PromptList(); p; p = p->next)
sets += descriptor_UpdateSet(&p->desc, r, w, e, n);
return sets;
}
static int
server_IsSet(struct descriptor *d, const fd_set *fdset)
{
struct server *s = descriptor2server(d);
struct prompt *p;
if (s->fd >= 0 && FD_ISSET(s->fd, fdset))
return 1;
for (p = log_PromptList(); p; p = p->next)
if (descriptor_IsSet(&p->desc, fdset))
return 1;
return 0;
}
#define IN_SIZE sizeof(struct sockaddr_in)
#define UN_SIZE sizeof(struct sockaddr_in)
#define ADDRSZ (IN_SIZE > UN_SIZE ? IN_SIZE : UN_SIZE)
static void
server_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
{
struct server *s = descriptor2server(d);
char hisaddr[ADDRSZ];
struct sockaddr *sa = (struct sockaddr *)hisaddr;
struct sockaddr_in *in = (struct sockaddr_in *)hisaddr;
int ssize = ADDRSZ, wfd;
struct prompt *p;
if (s->fd >= 0 && FD_ISSET(s->fd, fdset)) {
wfd = accept(s->fd, sa, &ssize);
if (wfd < 0)
log_Printf(LogERROR, "server_Read: accept(): %s\n", strerror(errno));
} else
wfd = -1;
if (wfd >= 0)
switch (sa->sa_family) {
case AF_LOCAL:
log_Printf(LogPHASE, "Connected to local client.\n");
break;
case AF_INET:
if (ntohs(in->sin_port) < 1024) {
log_Printf(LogALERT, "Rejected client connection from %s:%u"
"(invalid port number) !\n",
inet_ntoa(in->sin_addr), ntohs(in->sin_port));
close(wfd);
wfd = -1;
break;
}
log_Printf(LogPHASE, "Connected to client from %s:%u\n",
inet_ntoa(in->sin_addr), in->sin_port);
break;
default:
write(wfd, "Unrecognised access !\n", 22);
close(wfd);
wfd = -1;
break;
}
if (wfd >= 0) {
if ((p = prompt_Create(s, bundle, wfd)) == NULL) {
write(wfd, "Connection refused.\n", 20);
close(wfd);
} else {
switch (sa->sa_family) {
case AF_LOCAL:
p->src.type = "local";
strncpy(p->src.from, s->rm, sizeof p->src.from - 1);
p->src.from[sizeof p->src.from - 1] = '\0';
break;
case AF_INET:
p->src.type = "tcp";
snprintf(p->src.from, sizeof p->src.from, "%s:%u",
inet_ntoa(in->sin_addr), in->sin_port);
break;
}
prompt_TtyCommandMode(p);
prompt_Required(p);
}
}
log_PromptListChanged = 0;
for (p = log_PromptList(); p; p = p->next)
if (descriptor_IsSet(&p->desc, fdset)) {
descriptor_Read(&p->desc, bundle, fdset);
if (log_PromptListChanged)
break;
}
}
static int
server_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
{
/* We never want to write here ! */
log_Printf(LogALERT, "server_Write: Internal error: Bad call !\n");
return 0;
}
struct server server = {
{
SERVER_DESCRIPTOR,
server_UpdateSet,
server_IsSet,
server_Read,
server_Write
},
-1
};
int
server_LocalOpen(struct bundle *bundle, const char *name, mode_t mask)
{
int s;
if (server.rm && !strcmp(server.rm, name)) {
if (chmod(server.rm, mask))
log_Printf(LogERROR, "Local: chmod: %s\n", strerror(errno));
return 0;
}
memset(&server.ifsun, '\0', sizeof server.ifsun);
server.ifsun.sun_len = strlen(name);
if (server.ifsun.sun_len > sizeof server.ifsun.sun_path - 1) {
log_Printf(LogERROR, "Local: %s: Path too long\n", name);
return 2;
}
server.ifsun.sun_family = AF_LOCAL;
strcpy(server.ifsun.sun_path, name);
s = ID0socket(PF_LOCAL, SOCK_STREAM, 0);
if (s < 0) {
log_Printf(LogERROR, "Local: socket: %s\n", strerror(errno));
return 3;
}
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &s, sizeof s);
if (mask != (mode_t)-1)
mask = umask(mask);
if (bind(s, (struct sockaddr *)&server.ifsun, sizeof server.ifsun) < 0) {
if (mask != (mode_t)-1)
umask(mask);
log_Printf(LogWARN, "Local: bind: %s\n", strerror(errno));
close(s);
return 4;
}
if (mask != (mode_t)-1)
umask(mask);
if (listen(s, 5) != 0) {
log_Printf(LogERROR, "Local: Unable to listen to socket - BUNDLE overload?\n");
close(s);
ID0unlink(name);
return 5;
}
server_Close(bundle);
server.fd = s;
server.rm = server.ifsun.sun_path;
log_Printf(LogPHASE, "Listening at local socket %s.\n", name);
return 0;
}
int
server_TcpOpen(struct bundle *bundle, int port)
{
struct sockaddr_in ifsin;
int s;
if (server.port == port)
return 0;
s = ID0socket(PF_INET, SOCK_STREAM, 0);
if (s < 0) {
log_Printf(LogERROR, "Tcp: socket: %s\n", strerror(errno));
return 7;
}
memset(&ifsin, '\0', sizeof ifsin);
ifsin.sin_family = AF_INET;
ifsin.sin_addr.s_addr = INADDR_ANY;
ifsin.sin_port = htons(port);
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &s, sizeof s);
if (bind(s, (struct sockaddr *)&ifsin, sizeof ifsin) < 0) {
log_Printf(LogWARN, "Tcp: bind: %s\n", strerror(errno));
close(s);
return 8;
}
if (listen(s, 5) != 0) {
log_Printf(LogERROR, "Tcp: Unable to listen to socket - BUNDLE overload?\n");
close(s);
return 9;
}
server_Close(bundle);
server.fd = s;
server.port = port;
log_Printf(LogPHASE, "Listening at port %d.\n", port);
return 0;
}
int
server_Close(struct bundle *bundle)
{
if (server.fd >= 0) {
close(server.fd);
if (server.rm) {
ID0unlink(server.rm);
server.rm = NULL;
}
server.fd = -1;
server.port = 0;
/* Drop associated prompts */
log_DestroyPrompts(&server);
return 1;
}
return 0;
}
