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/* server.c */
/* No. It doesn't work yet. It's just hard to have 2 separated trees, one for releases
* and one for development */
/*
Copyright 2004 Aris Adamantiadis
This file is part of the SSH Library
The SSH Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version.
The SSH Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the SSH Library; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
/* from times to times, you need to serve your friends */
/* and, perhaps, ssh connections. */
#ifdef WITH_SERVER
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <errno.h>
#include <string.h>
#include "libssh/libssh.h"
#include "libssh/server.h"
int bind_socket() {
struct sockaddr_in myaddr;
int opt = 1;
int s = socket(PF_INET, SOCK_STREAM, 0);
memset(&myaddr, 0, sizeof(myaddr));
myaddr.sin_family = AF_INET;
myaddr.sin_port = htons(2222);
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
if (bind(s, (struct sockaddr *) &myaddr, sizeof(myaddr)) < 0) {
ssh_set_error(NULL, SSH_FATAL, "%s", strerror(errno));
return -1;
}
/* ok, bound */
return s;
}
int listen_socket(int socket) {
int i = listen(socket, 1);
if (i < 0)
ssh_set_error(NULL, SSH_FATAL, "listening on %d : %s",
strerror(errno));
return i;
}
int accept_socket(int socket) {
int i = accept(socket, NULL, NULL);
if (i < 0)
ssh_set_error(NULL, SSH_FATAL, "accepting client on socket %d : %s",
strerror(errno));
return i;
}
SSH_SESSION *getserver(SSH_OPTIONS * options) {
int socket;
int fd;
SSH_SESSION *session;
socket = bind_socket();
if (socket < 0)
return NULL;
if (listen_socket(socket) < 0)
return NULL;
fd = accept_socket(socket);
close(socket);
if (fd < 0) {
return NULL;
}
session = malloc(sizeof(SSH_SESSION));
memset(session, 0, sizeof(SSH_SESSION));
session->fd = fd;
session->options = options;
ssh_send_banner(session);
return session;
}
extern char *supported_methods[];
int server_set_kex(SSH_SESSION * session) {
KEX *server = &session->server_kex;
SSH_OPTIONS *options = session->options;
int i;
char *wanted;
if (!options) {
ssh_set_error(session, SSH_FATAL,
"Options structure is null(client's bug)");
return -1;
}
memset(server,0,sizeof(KEX));
/* the program might ask for a specific cookie to be sent. useful for server
debugging */
if (options->wanted_cookie)
memcpy(server->cookie, options->wanted_cookie, 16);
else
ssh_get_random(server->cookie, 16);
server->methods = malloc(10 * sizeof(char **));
for (i = 0; i < 10; i++) {
if (!(wanted = options->wanted_methods[i]))
wanted = supported_methods[i];
server->methods[i] = wanted;
printf("server->methods[%d]=%s\n",i,wanted);
if (!server->methods[i]) {
ssh_set_error(session, SSH_FATAL,
"kex error : did not find algo");
return -1;
}
return 0;
}
#endif /* HAVE_SERVER */
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