![Moshe Kaplan](/assets/img/avatar_default.png)
Fix misppellings in root and ui directories. Most of these are comments, but some are in error messages.
475 lines
13 KiB
C
475 lines
13 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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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include <config.h>
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#define WS_LOG_DOMAIN LOG_DOMAIN_MAIN
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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 _WIN32
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#include <wsutil/unicode-utils.h>
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#include <wsutil/win32-utils.h>
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#endif
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#include <wsutil/filesystem.h>
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#include <wsutil/socket.h>
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#include <wsutil/inet_addr.h>
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#include <wsutil/please_report_bug.h>
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#include <wsutil/wslog.h>
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#include <wsutil/ws_getopt.h>
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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 <wsutil/version_info.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 mode = 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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char *err_msg;
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err_msg = ws_init_sockets();
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if (err_msg != NULL) {
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ws_warning("ERROR: %s", err_msg);
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g_free(err_msg);
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ws_warning("%s", please_report_bug());
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return fd;
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}
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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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(void) 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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ws_inet_pton4(path, (ws_in4_addr *)&(s_in.sin_addr.s_addr));
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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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static void
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print_usage(FILE* output)
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{
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fprintf(output, "\n");
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fprintf(output, "Usage: sharkd [<classic_options>|<gold_options>]\n");
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fprintf(output, "\n");
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fprintf(output, "Classic (classic_options):\n");
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fprintf(output, " [-|<socket>]\n");
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fprintf(output, "\n");
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fprintf(output, " <socket> examples:\n");
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#ifdef SHARKD_UNIX_SUPPORT
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fprintf(output, " - 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(output, " - tcp:127.0.0.1:4446 - listen on TCP port 4446\n");
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#endif
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fprintf(output, "\n");
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fprintf(output, "Gold (gold_options):\n");
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fprintf(output, " -a <socket>, --api <socket>\n");
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fprintf(output, " listen on this socket\n");
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fprintf(output, " -h, --help show this help information\n");
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fprintf(output, " -v, --version show version information\n");
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fprintf(output, " -C <config profile>, --config-profile <config profile>\n");
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fprintf(output, " start with specified configuration profile\n");
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fprintf(output, "\n");
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fprintf(output, " Examples:\n");
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fprintf(output, " sharkd -C myprofile\n");
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fprintf(output, " sharkd -a tcp:127.0.0.1:4446 -C myprofile\n");
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fprintf(output, "\n");
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fprintf(output, "See the sharkd page of the Wireshark wiki for full details.\n");
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fprintf(output, "\n");
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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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/*
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* The leading + ensures that getopt_long() does not permute the argv[]
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* entries.
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*
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* We have to make sure that the first getopt_long() preserves the content
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* of argv[] for the subsequent getopt_long() call.
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*
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* We use getopt_long() in both cases to ensure that we're using a routine
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* whose permutation behavior we can control in the same fashion on all
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* platforms, and so that, if we ever need to process a long argument before
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* doing further initialization, we can do so.
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*
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* Glibc and Solaris libc document that a leading + disables permutation
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* of options, regardless of whether POSIXLY_CORRECT is set or not; *BSD
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* and macOS don't document it, but do so anyway.
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*
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* We do *not* use a leading - because the behavior of a leading - is
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* platform-dependent.
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*/
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#define OPTSTRING "+" "a:hmvC:"
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static const char optstring[] = OPTSTRING;
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// right now we don't have any long options
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static const struct ws_option long_options[] = {
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{"api", ws_required_argument, NULL, 'a'},
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{"help", ws_no_argument, NULL, 'h'},
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{"version", ws_no_argument, NULL, 'v'},
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{"config-profile", ws_required_argument, NULL, 'C'},
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{0, 0, 0, 0 }
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};
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int opt;
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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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print_usage(stderr);
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return -1;
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}
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// check for classic command line
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if (!strcmp(argv[1], "-") || argv[1][0] == 't' || argv[1][0] == 'u')
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{
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mode = SHARKD_MODE_CLASSIC_CONSOLE;
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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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mode = SHARKD_MODE_CLASSIC_CONSOLE;
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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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mode = SHARKD_MODE_CLASSIC_DAEMON;
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}
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}
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else
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mode = SHARKD_MODE_GOLD_CONSOLE; // assume we are running as gold console
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if (mode >= SHARKD_MODE_GOLD_CONSOLE)
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{
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/*
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In Daemon Mode, we will come through here twice; once when we start the Daemon and
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once again after we have forked the session process. The second time through, the
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session process has already had its stdin and stdout wired up to the TCP or UNIX
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socket and so in the original version of sharkd the session process is invoked with
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the command line: sharkd -
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When not using the classic command line, we want to spawn the session process with
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the complete command line with all the new options but with the -a option and
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parameter removed. Invoking a second time with the -a option will cause a loop
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where we repeatedly spawn a new session process.
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*/
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do {
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if (ws_optind > (argc - 1))
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break;
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opt = ws_getopt_long(argc, argv, optstring, long_options, NULL);
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switch (opt) {
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case 'C': /* Configuration Profile */
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if (profile_exists(ws_optarg, FALSE)) {
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set_profile_name(ws_optarg); // In Daemon Mode, we may need to do this again in the child process
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}
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else {
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fprintf(stderr, "Configuration Profile \"%s\" does not exist\n", ws_optarg);
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return -1;
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}
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break;
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case 'a':
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fd = socket_init(ws_optarg);
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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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fprintf(stderr, "Sharkd listening on: %s\n", ws_optarg);
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mode = SHARKD_MODE_GOLD_DAEMON;
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break;
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case 'h':
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print_usage(stderr);
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exit(0);
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break;
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case 'm':
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// m is an internal-only option used when the daemon session process is created
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mode = SHARKD_MODE_GOLD_CONSOLE;
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break;
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case 'v': /* Show version and exit */
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show_version();
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exit(0);
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break;
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default:
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if (!ws_optopt)
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fprintf(stderr, "This option isn't supported: %s\n", argv[ws_optind]);
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fprintf(stderr, "Use sharkd -h for details of supported options\n");
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exit(0);
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break;
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}
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} while (opt != -1);
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}
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if (mode == SHARKD_MODE_CLASSIC_DAEMON || mode == SHARKD_MODE_GOLD_DAEMON)
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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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#ifndef _WIN32
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sharkd_loop(int argc _U_, char* argv[] _U_)
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#else
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sharkd_loop(int argc _U_, char* argv[])
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#endif
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{
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if (mode == SHARKD_MODE_CLASSIC_CONSOLE || mode == SHARKD_MODE_GOLD_CONSOLE)
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{
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return sharkd_session_main(mode);
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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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size_t i_handles;
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HANDLE handles[2];
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PROCESS_INFORMATION pi;
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STARTUPINFO si;
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char *exename;
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char command_line[2048];
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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(mode));
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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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i_handles = 0;
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handles[i_handles++] = (HANDLE)fd;
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if (si.hStdError != NULL) {
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handles[i_handles++] = si.hStdError;
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}
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exename = get_executable_path("sharkd");
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// we need to pass in all of the command line parameters except the -a parameter
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// passing in -a at this point would could a loop, each iteration of which would generate a new session process
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memset(&command_line, 0, sizeof(command_line));
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if (mode <= SHARKD_MODE_CLASSIC_DAEMON)
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{
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(void) g_strlcat(command_line, "sharkd.exe -", sizeof(command_line));
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}
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else
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{
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// The -m option used here is an internal-only option that notifies the child process that it should
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// run in Gold Console mode
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(void) g_strlcat(command_line, "sharkd.exe -m", sizeof(command_line));
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for (int i = 1; i < argc; i++)
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{
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if (
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!g_ascii_strncasecmp(argv[i], "-a", (guint)strlen(argv[i]))
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|| !g_ascii_strncasecmp(argv[i], "--api", (guint)strlen(argv[i]))
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)
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{
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i++; // skip the socket details
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}
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else
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{
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(void) g_strlcat(command_line, " ", sizeof(command_line));
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(void) g_strlcat(command_line, argv[i], sizeof(command_line));
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}
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}
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}
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if (!win32_create_process(exename, command_line, NULL, NULL, i_handles, handles, 0, NULL, NULL, &si, &pi))
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{
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fprintf(stderr, "win32_create_process(%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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#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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