![Jakub Zawadzki](/assets/img/avatar_default.png)
Change-Id: I65713f6d49fccb2045a99636d0d2f1aa5be44b83 Reviewed-on: https://code.wireshark.org/review/23677 Petri-Dish: Jakub Zawadzki <darkjames-ws@darkjames.pl> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Jakub Zawadzki <darkjames-ws@darkjames.pl>
323 lines
6.4 KiB
C
323 lines
6.4 KiB
C
/* sharkd_daemon.c
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*
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* Copyright (C) 2016 Jakub Zawadzki
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <config.h>
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#include <glib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <signal.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef _WIN32
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#include <wsutil/unicode-utils.h>
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#include <wsutil/filesystem.h>
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#endif
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#include <wsutil/socket.h>
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifndef _WIN32
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#include <sys/un.h>
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#include <netinet/tcp.h>
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#endif
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#include <wsutil/strtoi.h>
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#include "sharkd.h"
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#ifdef _WIN32
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/* for windows support TCP sockets */
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# define SHARKD_TCP_SUPPORT
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#else
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/* for other system support only local sockets */
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# define SHARKD_UNIX_SUPPORT
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#endif
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static int _use_stdinout = 0;
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static socket_handle_t _server_fd = INVALID_SOCKET;
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static socket_handle_t
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socket_init(char *path)
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{
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socket_handle_t fd = INVALID_SOCKET;
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#ifdef _WIN32
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WSADATA wsaData;
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int result;
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result = WSAStartup(MAKEWORD(1, 1), &wsaData);
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if (result != 0) {
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g_warning("ERROR: WSAStartup failed with error: %d", result);
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return INVALID_SOCKET;
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}
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#endif
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#ifdef SHARKD_UNIX_SUPPORT
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if (!strncmp(path, "unix:", 5))
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{
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struct sockaddr_un s_un;
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socklen_t s_un_len;
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path += 5;
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if (strlen(path) + 1 > sizeof(s_un.sun_path))
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return INVALID_SOCKET;
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fd = socket(AF_UNIX, SOCK_STREAM, 0);
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if (fd == INVALID_SOCKET)
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return INVALID_SOCKET;
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memset(&s_un, 0, sizeof(s_un));
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s_un.sun_family = AF_UNIX;
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g_strlcpy(s_un.sun_path, path, sizeof(s_un.sun_path));
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s_un_len = (socklen_t)(offsetof(struct sockaddr_un, sun_path) + strlen(s_un.sun_path));
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if (s_un.sun_path[0] == '@')
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s_un.sun_path[0] = '\0';
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if (bind(fd, (struct sockaddr *) &s_un, s_un_len))
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{
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closesocket(fd);
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return INVALID_SOCKET;
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}
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}
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else
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#endif
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#ifdef SHARKD_TCP_SUPPORT
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if (!strncmp(path, "tcp:", 4))
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{
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struct sockaddr_in s_in;
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int one = 1;
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char *port_sep;
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guint16 port;
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path += 4;
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port_sep = strchr(path, ':');
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if (!port_sep)
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return INVALID_SOCKET;
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*port_sep = '\0';
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if (ws_strtou16(port_sep + 1, NULL, &port) == FALSE)
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return INVALID_SOCKET;
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#ifdef _WIN32
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/* Need to use WSASocket() to disable overlapped I/O operations,
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this way on windows SOCKET can be used as HANDLE for stdin/stdout */
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fd = WSASocket(AF_INET, SOCK_STREAM, 0, NULL, 0, 0);
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#else
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fd = socket(AF_INET, SOCK_STREAM, 0);
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#endif
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if (fd == INVALID_SOCKET)
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return INVALID_SOCKET;
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s_in.sin_family = AF_INET;
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s_in.sin_addr.s_addr = inet_addr(path);
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s_in.sin_port = g_htons(port);
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*port_sep = ':';
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setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *) &one, sizeof(one));
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if (bind(fd, (struct sockaddr *) &s_in, sizeof(struct sockaddr_in)))
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{
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closesocket(fd);
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return INVALID_SOCKET;
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}
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}
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else
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#endif
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{
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return INVALID_SOCKET;
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}
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if (listen(fd, SOMAXCONN))
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{
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closesocket(fd);
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return INVALID_SOCKET;
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}
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return fd;
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}
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int
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sharkd_init(int argc, char **argv)
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{
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#ifndef _WIN32
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pid_t pid;
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#endif
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socket_handle_t fd;
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if (argc != 2)
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{
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fprintf(stderr, "Usage: %s <-|socket>\n", argv[0]);
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fprintf(stderr, "\n");
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fprintf(stderr, "<socket> examples:\n");
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#ifdef SHARKD_UNIX_SUPPORT
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fprintf(stderr, " - unix:/tmp/sharkd.sock - listen on unix file /tmp/sharkd.sock\n");
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#endif
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#ifdef SHARKD_TCP_SUPPORT
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fprintf(stderr, " - tcp:127.0.0.1:4446 - listen on TCP port 4446\n");
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#endif
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fprintf(stderr, "\n");
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return -1;
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}
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#ifndef _WIN32
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signal(SIGCHLD, SIG_IGN);
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#endif
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if (!strcmp(argv[1], "-"))
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{
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_use_stdinout = 1;
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}
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else
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{
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fd = socket_init(argv[1]);
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if (fd == INVALID_SOCKET)
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return -1;
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_server_fd = fd;
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}
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if (!_use_stdinout)
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{
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/* all good - try to daemonize */
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#ifndef _WIN32
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pid = fork();
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if (pid == -1)
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fprintf(stderr, "cannot go to background fork() failed: %s\n", g_strerror(errno));
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if (pid != 0)
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{
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/* parent */
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exit(0);
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}
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#endif
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}
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return 0;
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}
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int
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sharkd_loop(void)
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{
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if (_use_stdinout)
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{
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return sharkd_session_main();
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}
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while (1)
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{
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#ifndef _WIN32
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pid_t pid;
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#else
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PROCESS_INFORMATION pi;
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STARTUPINFO si;
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char *exename;
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gunichar2 *commandline;
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#endif
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socket_handle_t fd;
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fd = accept(_server_fd, NULL, NULL);
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if (fd == INVALID_SOCKET)
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{
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fprintf(stderr, "cannot accept(): %s\n", g_strerror(errno));
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continue;
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}
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/* wireshark is not ready for handling multiple capture files in single process, so fork(), and handle it in separate process */
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#ifndef _WIN32
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pid = fork();
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if (pid == 0)
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{
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closesocket(_server_fd);
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/* redirect stdin, stdout to socket */
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dup2(fd, 0);
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dup2(fd, 1);
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close(fd);
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exit(sharkd_session_main());
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}
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if (pid == -1)
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{
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fprintf(stderr, "cannot fork(): %s\n", g_strerror(errno));
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}
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#else
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memset(&pi, 0, sizeof(pi));
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memset(&si, 0, sizeof(si));
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si.cb = sizeof(si);
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si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
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si.hStdInput = (HANDLE) fd;
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si.hStdOutput = (HANDLE) fd;
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si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
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exename = g_strdup_printf("%s\\%s", get_progfile_dir(), "sharkd.exe");
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commandline = g_utf8_to_utf16("sharkd.exe -", -1, NULL, NULL, NULL);
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if (!CreateProcess(utf_8to16(exename), commandline, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi))
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{
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fprintf(stderr, "CreateProcess(%s) failed\n", exename);
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}
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else
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{
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CloseHandle(pi.hThread);
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}
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g_free(exename);
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g_free(commandline);
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#endif
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closesocket(fd);
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}
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return 0;
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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