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-rw-r--r--sharkd_daemon.c475
1 files changed, 475 insertions, 0 deletions
diff --git a/sharkd_daemon.c b/sharkd_daemon.c
new file mode 100644
index 00000000..346f87b7
--- /dev/null
+++ b/sharkd_daemon.c
@@ -0,0 +1,475 @@
+/* sharkd_daemon.c
+ *
+ * Copyright (C) 2016 Jakub Zawadzki
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include <config.h>
+#define WS_LOG_DOMAIN LOG_DOMAIN_MAIN
+
+#include <glib.h>
+
+#include <stdio.h>
+#include <errno.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <signal.h>
+
+#ifdef _WIN32
+#include <wsutil/unicode-utils.h>
+#include <wsutil/win32-utils.h>
+#endif
+
+#include <wsutil/filesystem.h>
+#include <wsutil/socket.h>
+#include <wsutil/inet_addr.h>
+#include <wsutil/please_report_bug.h>
+#include <wsutil/wslog.h>
+#include <wsutil/ws_getopt.h>
+
+#ifndef _WIN32
+#include <sys/un.h>
+#include <netinet/tcp.h>
+#endif
+
+#include <wsutil/strtoi.h>
+#include <wsutil/version_info.h>
+
+#include "sharkd.h"
+
+#ifdef _WIN32
+/* for windows support TCP sockets */
+# define SHARKD_TCP_SUPPORT
+#else
+/* for other system support only local sockets */
+# define SHARKD_UNIX_SUPPORT
+#endif
+
+static int mode = 0;
+static socket_handle_t _server_fd = INVALID_SOCKET;
+
+static socket_handle_t
+socket_init(char *path)
+{
+ socket_handle_t fd = INVALID_SOCKET;
+ char *err_msg;
+
+ err_msg = ws_init_sockets();
+ if (err_msg != NULL) {
+ ws_warning("ERROR: %s", err_msg);
+ g_free(err_msg);
+ ws_warning("%s", please_report_bug());
+ return fd;
+ }
+
+#ifdef SHARKD_UNIX_SUPPORT
+ if (!strncmp(path, "unix:", 5))
+ {
+ struct sockaddr_un s_un;
+ socklen_t s_un_len;
+
+ path += 5;
+
+ if (strlen(path) + 1 > sizeof(s_un.sun_path))
+ return INVALID_SOCKET;
+
+ fd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (fd == INVALID_SOCKET)
+ return INVALID_SOCKET;
+
+ memset(&s_un, 0, sizeof(s_un));
+ s_un.sun_family = AF_UNIX;
+ (void) g_strlcpy(s_un.sun_path, path, sizeof(s_un.sun_path));
+
+ s_un_len = (socklen_t)(offsetof(struct sockaddr_un, sun_path) + strlen(s_un.sun_path));
+
+ if (s_un.sun_path[0] == '@')
+ s_un.sun_path[0] = '\0';
+
+ if (bind(fd, (struct sockaddr *) &s_un, s_un_len))
+ {
+ closesocket(fd);
+ return INVALID_SOCKET;
+ }
+ }
+ else
+#endif
+
+#ifdef SHARKD_TCP_SUPPORT
+ if (!strncmp(path, "tcp:", 4))
+ {
+ struct sockaddr_in s_in;
+ int one = 1;
+ char *port_sep;
+ guint16 port;
+
+ path += 4;
+
+ port_sep = strchr(path, ':');
+ if (!port_sep)
+ return INVALID_SOCKET;
+
+ *port_sep = '\0';
+
+ if (ws_strtou16(port_sep + 1, NULL, &port) == FALSE)
+ return INVALID_SOCKET;
+
+#ifdef _WIN32
+ /* Need to use WSASocket() to disable overlapped I/O operations,
+ this way on windows SOCKET can be used as HANDLE for stdin/stdout */
+ fd = WSASocket(AF_INET, SOCK_STREAM, 0, NULL, 0, 0);
+#else
+ fd = socket(AF_INET, SOCK_STREAM, 0);
+#endif
+ if (fd == INVALID_SOCKET)
+ return INVALID_SOCKET;
+
+ s_in.sin_family = AF_INET;
+ ws_inet_pton4(path, (ws_in4_addr *)&(s_in.sin_addr.s_addr));
+ s_in.sin_port = g_htons(port);
+ *port_sep = ':';
+
+ setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *) &one, sizeof(one));
+
+ if (bind(fd, (struct sockaddr *) &s_in, sizeof(struct sockaddr_in)))
+ {
+ closesocket(fd);
+ return INVALID_SOCKET;
+ }
+ }
+ else
+#endif
+ {
+ return INVALID_SOCKET;
+ }
+
+ if (listen(fd, SOMAXCONN))
+ {
+ closesocket(fd);
+ return INVALID_SOCKET;
+ }
+
+ return fd;
+}
+
+static void
+print_usage(FILE* output)
+{
+ fprintf(output, "\n");
+ fprintf(output, "Usage: sharkd [<classic_options>|<gold_options>]\n");
+
+ fprintf(output, "\n");
+ fprintf(output, "Classic (classic_options):\n");
+ fprintf(output, " [-|<socket>]\n");
+ fprintf(output, "\n");
+ fprintf(output, " <socket> examples:\n");
+#ifdef SHARKD_UNIX_SUPPORT
+ fprintf(output, " - unix:/tmp/sharkd.sock - listen on unix file /tmp/sharkd.sock\n");
+#endif
+#ifdef SHARKD_TCP_SUPPORT
+ fprintf(output, " - tcp:127.0.0.1:4446 - listen on TCP port 4446\n");
+#endif
+
+ fprintf(output, "\n");
+ fprintf(output, "Gold (gold_options):\n");
+ fprintf(output, " -a <socket>, --api <socket>\n");
+ fprintf(output, " listen on this socket\n");
+ fprintf(output, " -h, --help show this help information\n");
+ fprintf(output, " -v, --version show version information\n");
+ fprintf(output, " -C <config profile>, --config-profile <config profile>\n");
+ fprintf(output, " start with specified configuration profile\n");
+
+ fprintf(output, "\n");
+ fprintf(output, " Examples:\n");
+ fprintf(output, " sharkd -C myprofile\n");
+ fprintf(output, " sharkd -a tcp:127.0.0.1:4446 -C myprofile\n");
+
+ fprintf(output, "\n");
+ fprintf(output, "See the sharkd page of the Wireshark wiki for full details.\n");
+ fprintf(output, "\n");
+}
+
+int
+sharkd_init(int argc, char **argv)
+{
+ /*
+ * The leading + ensures that getopt_long() does not permute the argv[]
+ * entries.
+ *
+ * We have to make sure that the first getopt_long() preserves the content
+ * of argv[] for the subsequent getopt_long() call.
+ *
+ * We use getopt_long() in both cases to ensure that we're using a routine
+ * whose permutation behavior we can control in the same fashion on all
+ * platforms, and so that, if we ever need to process a long argument before
+ * doing further initialization, we can do so.
+ *
+ * Glibc and Solaris libc document that a leading + disables permutation
+ * of options, regardless of whether POSIXLY_CORRECT is set or not; *BSD
+ * and macOS don't document it, but do so anyway.
+ *
+ * We do *not* use a leading - because the behavior of a leading - is
+ * platform-dependent.
+ */
+
+#define OPTSTRING "+" "a:hmvC:"
+
+ static const char optstring[] = OPTSTRING;
+
+ // right now we don't have any long options
+ static const struct ws_option long_options[] = {
+ {"api", ws_required_argument, NULL, 'a'},
+ {"help", ws_no_argument, NULL, 'h'},
+ {"version", ws_no_argument, NULL, 'v'},
+ {"config-profile", ws_required_argument, NULL, 'C'},
+ {0, 0, 0, 0 }
+ };
+
+ int opt;
+
+#ifndef _WIN32
+ pid_t pid;
+#endif
+ socket_handle_t fd;
+
+ if (argc < 2)
+ {
+ print_usage(stderr);
+ return -1;
+ }
+
+ // check for classic command line
+ if (!strcmp(argv[1], "-") || argv[1][0] == 't' || argv[1][0] == 'u')
+ {
+ mode = SHARKD_MODE_CLASSIC_CONSOLE;
+
+#ifndef _WIN32
+ signal(SIGCHLD, SIG_IGN);
+#endif
+
+ if (!strcmp(argv[1], "-"))
+ {
+ mode = SHARKD_MODE_CLASSIC_CONSOLE;
+ }
+ else
+ {
+ fd = socket_init(argv[1]);
+ if (fd == INVALID_SOCKET)
+ return -1;
+ _server_fd = fd;
+ mode = SHARKD_MODE_CLASSIC_DAEMON;
+ }
+ }
+ else
+ mode = SHARKD_MODE_GOLD_CONSOLE; // assume we are running as gold console
+
+ if (mode >= SHARKD_MODE_GOLD_CONSOLE)
+ {
+ /*
+ In Daemon Mode, we will come through here twice; once when we start the Daemon and
+ once again after we have forked the session process. The second time through, the
+ session process has already had its stdin and stdout wired up to the TCP or UNIX
+ socket and so in the original version of sharkd the session process is invoked with
+ the command line: sharkd -
+
+ When not using the classic command line, we want to spawn the session process with
+ the complete command line with all the new options but with the -a option and
+ parameter removed. Invoking a second time with the -a option will cause a loop
+ where we repeatedly spawn a new session process.
+ */
+
+ do {
+ if (ws_optind > (argc - 1))
+ break;
+
+ opt = ws_getopt_long(argc, argv, optstring, long_options, NULL);
+
+ switch (opt) {
+ case 'C': /* Configuration Profile */
+ if (profile_exists(ws_optarg, FALSE)) {
+ set_profile_name(ws_optarg); // In Daemon Mode, we may need to do this again in the child process
+ }
+ else {
+ fprintf(stderr, "Configuration Profile \"%s\" does not exist\n", ws_optarg);
+ return -1;
+ }
+ break;
+
+ case 'a':
+ fd = socket_init(ws_optarg);
+ if (fd == INVALID_SOCKET)
+ return -1;
+ _server_fd = fd;
+
+ fprintf(stderr, "Sharkd listening on: %s\n", ws_optarg);
+
+ mode = SHARKD_MODE_GOLD_DAEMON;
+ break;
+
+ case 'h':
+ show_help_header("Daemon variant of Wireshark");
+ print_usage(stderr);
+ exit(0);
+ break;
+
+ case 'm':
+ // m is an internal-only option used when the daemon session process is created
+ mode = SHARKD_MODE_GOLD_CONSOLE;
+ break;
+
+ case 'v': /* Show version and exit */
+ show_version();
+ exit(0);
+ break;
+
+ default:
+ if (!ws_optopt)
+ fprintf(stderr, "This option isn't supported: %s\n", argv[ws_optind]);
+ fprintf(stderr, "Use sharkd -h for details of supported options\n");
+ exit(0);
+ break;
+ }
+ } while (opt != -1);
+ }
+
+ if (mode == SHARKD_MODE_CLASSIC_DAEMON || mode == SHARKD_MODE_GOLD_DAEMON)
+ {
+ /* all good - try to daemonize */
+#ifndef _WIN32
+ pid = fork();
+ if (pid == -1)
+ fprintf(stderr, "cannot go to background fork() failed: %s\n", g_strerror(errno));
+
+ if (pid != 0)
+ {
+ /* parent */
+ exit(0);
+ }
+#endif
+ }
+
+ return 0;
+}
+
+int
+#ifndef _WIN32
+sharkd_loop(int argc _U_, char* argv[] _U_)
+#else
+sharkd_loop(int argc _U_, char* argv[])
+#endif
+{
+ if (mode == SHARKD_MODE_CLASSIC_CONSOLE || mode == SHARKD_MODE_GOLD_CONSOLE)
+ {
+ return sharkd_session_main(mode);
+ }
+
+ while (1)
+ {
+#ifndef _WIN32
+ pid_t pid;
+#else
+ size_t i_handles;
+ HANDLE handles[2];
+ PROCESS_INFORMATION pi;
+ STARTUPINFO si;
+ char *exename;
+ char command_line[2048];
+#endif
+ socket_handle_t fd;
+
+ fd = accept(_server_fd, NULL, NULL);
+ if (fd == INVALID_SOCKET)
+ {
+ fprintf(stderr, "cannot accept(): %s\n", g_strerror(errno));
+ continue;
+ }
+
+ /* wireshark is not ready for handling multiple capture files in single process, so fork(), and handle it in separate process */
+#ifndef _WIN32
+ pid = fork();
+ if (pid == 0)
+ {
+ closesocket(_server_fd);
+ /* redirect stdin, stdout to socket */
+ dup2(fd, 0);
+ dup2(fd, 1);
+ close(fd);
+
+ exit(sharkd_session_main(mode));
+ }
+
+ if (pid == -1)
+ {
+ fprintf(stderr, "cannot fork(): %s\n", g_strerror(errno));
+ }
+
+#else
+ memset(&pi, 0, sizeof(pi));
+ memset(&si, 0, sizeof(si));
+
+ si.cb = sizeof(si);
+ si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
+ si.hStdInput = (HANDLE) fd;
+ si.hStdOutput = (HANDLE) fd;
+ si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
+
+ i_handles = 0;
+ handles[i_handles++] = (HANDLE)fd;
+ if (si.hStdError != NULL) {
+ handles[i_handles++] = si.hStdError;
+ }
+
+ exename = get_executable_path("sharkd");
+
+ // we need to pass in all of the command line parameters except the -a parameter
+ // passing in -a at this point would could a loop, each iteration of which would generate a new session process
+ memset(&command_line, 0, sizeof(command_line));
+
+ if (mode <= SHARKD_MODE_CLASSIC_DAEMON)
+ {
+ (void) g_strlcat(command_line, "sharkd.exe -", sizeof(command_line));
+ }
+ else
+ {
+ // The -m option used here is an internal-only option that notifies the child process that it should
+ // run in Gold Console mode
+ (void) g_strlcat(command_line, "sharkd.exe -m", sizeof(command_line));
+
+ for (int i = 1; i < argc; i++)
+ {
+ if (
+ !g_ascii_strncasecmp(argv[i], "-a", (guint)strlen(argv[i]))
+ || !g_ascii_strncasecmp(argv[i], "--api", (guint)strlen(argv[i]))
+ )
+ {
+ i++; // skip the socket details
+ }
+ else
+ {
+ (void) g_strlcat(command_line, " ", sizeof(command_line));
+ (void) g_strlcat(command_line, argv[i], sizeof(command_line));
+ }
+ }
+ }
+
+ if (!win32_create_process(exename, command_line, NULL, NULL, i_handles, handles, 0, NULL, NULL, &si, &pi))
+ {
+ fprintf(stderr, "win32_create_process(%s) failed\n", exename);
+ }
+ else
+ {
+ CloseHandle(pi.hThread);
+ }
+
+ g_free(exename);
+#endif
+
+ closesocket(fd);
+ }
+ return 0;
+}
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