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/*
* osmo-pcap-server code
*
* (C) 2011 by Holger Hans Peter Freyther <zecke@selfish.org>
* (C) 2011 by On-Waves
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <osmo-pcap/osmo_pcap_server.h>
#include <osmo-pcap/common.h>
#include <osmocom/core/socket.h>
#include <osmocom/core/talloc.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
static void close_connection(struct osmo_pcap_conn *conn)
{
if (conn->rem_fd.fd != -1) {
close(conn->rem_fd.fd);
conn->rem_fd.fd = -1;
osmo_fd_unregister(&conn->rem_fd);
}
if (conn->local_fd != -1) {
close(conn->local_fd);
conn->local_fd = -1;
}
}
void osmo_pcap_server_delete(struct osmo_pcap_conn *conn)
{
close_connection(conn);
llist_del(&conn->entry);
talloc_free(conn);
}
struct osmo_pcap_conn *osmo_pcap_server_find(struct osmo_pcap_server *server,
const char *name)
{
struct osmo_pcap_conn *conn;
llist_for_each_entry(conn, &server->conn, entry) {
if (strcmp(conn->name, name) == 0)
return conn;
}
conn = talloc_zero(server, struct osmo_pcap_conn);
if (!conn) {
LOGP(DSERVER, LOGL_ERROR,
"Failed to find the connection.\n");
return NULL;
}
conn->name = talloc_strdup(conn, name);
conn->rem_fd.fd = -1;
conn->server = server;
llist_add_tail(&conn->entry, &server->conn);
return conn;
}
static int read_cb(struct osmo_fd *fd, unsigned int what)
{
struct osmo_pcap_conn *conn;
char buf[4096];
int rc;
conn = fd->data;
rc = read(fd->fd, buf, sizeof(buf));
if (rc < 0) {
LOGP(DSERVER, LOGL_ERROR, "Failed to read from %s\n", conn->name);
close_connection(conn);
return -1;
}
return 0;
}
static void new_connection(struct osmo_pcap_server *server,
struct osmo_pcap_conn *client, int new_fd)
{
close_connection(client);
memset(&client->file_hdr, 0, sizeof(client->file_hdr));
client->rem_fd.fd = new_fd;
if (osmo_fd_register(&client->rem_fd) != 0) {
LOGP(DSERVER, LOGL_ERROR, "Failed to register fd.\n");
client->rem_fd.fd = -1;
close(new_fd);
return;
}
client->rem_fd.data = client;
client->rem_fd.when = BSC_FD_READ;
client->rem_fd.cb = read_cb;
}
static int accept_cb(struct osmo_fd *fd, unsigned int when)
{
struct osmo_pcap_conn *conn;
struct osmo_pcap_server *server;
struct sockaddr_in addr;
socklen_t size = sizeof(addr);
int new_fd;
new_fd = accept(fd->fd, (struct sockaddr *) &addr, &size);
if (new_fd < 0) {
LOGP(DSERVER, LOGL_ERROR, "Failed to accept socket: %d\n", errno);
return -1;
}
server = fd->data;
llist_for_each_entry(conn, &server->conn, entry) {
if (conn->remote_addr.s_addr == addr.sin_addr.s_addr) {
LOGP(DSERVER, LOGL_NOTICE,
"New connection from %s\n", conn->name);
new_connection(server, conn, new_fd);
return 0;
}
}
LOGP(DSERVER, LOGL_ERROR,
"Failed to find client for %s\n", inet_ntoa(addr.sin_addr));
close(new_fd);
return -1;
}
int osmo_pcap_server_listen(struct osmo_pcap_server *server)
{
int fd;
fd = osmo_sock_init(AF_INET, SOCK_STREAM, IPPROTO_TCP,
server->addr, server->port, 1);
if (fd < 0) {
LOGP(DSERVER, LOGL_ERROR, "Failed to create the server socket.\n");
return -1;
}
server->listen_fd.fd = fd;
server->listen_fd.when = BSC_FD_READ;
server->listen_fd.cb = accept_cb;
server->listen_fd.data = server;
if (osmo_fd_register(&server->listen_fd) != 0) {
LOGP(DSERVER, LOGL_ERROR, "Failed to register the socket.\n");
close(fd);
return -1;
}
return 0;
}
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