mirror of https://gerrit.osmocom.org/osmo-pcap
322 lines
8.5 KiB
C
322 lines
8.5 KiB
C
/*
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* osmo-pcap-server code
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*
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* (C) 2011-2016 by Holger Hans Peter Freyther <holger@moiji-mobile.com>
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* (C) 2011 by On-Waves
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <osmo-pcap/common.h>
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#include <osmo-pcap/osmo_pcap_server.h>
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#include <osmo-pcap/osmo_tls.h>
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#include <osmocom/core/application.h>
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#include <osmocom/core/rate_ctr.h>
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#include <osmocom/core/select.h>
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#include <osmocom/core/stats.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/vty/logging.h>
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#include <osmocom/vty/telnet_interface.h>
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#include <osmocom/vty/stats.h>
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#include <osmocom/vty/misc.h>
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#include <pcap.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#define _GNU_SOURCE
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#include <getopt.h>
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#include "osmopcapconfig.h"
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static const char *config_file = "osmo-pcap-server.cfg";
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static int daemonize = 0;
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void *tall_srv_ctx;
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struct osmo_pcap_server *pcap_server;
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static const struct rate_ctr_desc pcap_peer_ctr_desc[] = {
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[PEER_CTR_CONNECT] = { "peer:connect", "Connect of a peer " },
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[PEER_CTR_BYTES] = { "peer:bytes", "Received bytes " },
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[PEER_CTR_PKTS] = { "peer:pkts", "Received packets " },
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[PEER_CTR_PROTATE] = { "peer:file_rotated","Capture file rotated" },
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};
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static const struct rate_ctr_desc pcap_server_ctr_desc[] = {
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[SERVER_CTR_CONNECT] = { "server:connect", "Connect of a peer " },
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[SERVER_CTR_BYTES] = { "server:bytes", "Received bytes " },
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[SERVER_CTR_PKTS] = { "server:pkts", "Received packets " },
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[SERVER_CTR_PROTATE] = { "server:file_rotated", "Capture file rotated" },
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[SERVER_CTR_NOCLIENT] = { "server:no_client", "Unknown connected " },
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};
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const struct rate_ctr_group_desc pcap_peer_group_desc = {
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.group_name_prefix = NULL, /* will be dynamically patched */
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.group_description = "PCAP peer statistics",
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.num_ctr = ARRAY_SIZE(pcap_peer_ctr_desc),
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.ctr_desc = pcap_peer_ctr_desc,
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.class_id = OSMO_STATS_CLASS_PEER,
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};
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static const struct rate_ctr_group_desc pcap_server_group_desc = {
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.group_name_prefix = "pcap:server",
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.group_description = "PCAP Server global statistics",
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.num_ctr = ARRAY_SIZE(pcap_server_ctr_desc),
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.ctr_desc = pcap_server_ctr_desc,
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.class_id = OSMO_STATS_CLASS_GLOBAL,
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};
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static struct vty_app_info vty_info = {
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.name = "OsmoPCAPServer",
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.version = PACKAGE_VERSION,
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.go_parent_cb = osmopcap_go_parent,
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};
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static void print_usage()
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{
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printf("Usage: osmo_pcap_server\n");
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}
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static void print_help()
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{
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printf(" Some useful help...\n");
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printf(" -h --help this text\n");
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printf(" -D --daemonize Fork the process into a background daemon\n");
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printf(" -V --version Print the version number\n");
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printf(" -d option --debug=DRLL:DCC:DMM:DRR:DRSL:DNM enable debugging\n");
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printf(" -s --disable-color\n");
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printf(" -T --timestamp. Print a timestamp in the debug output.\n");
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printf(" -e --log-level number. Set a global loglevel.\n");
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printf(" -c --config-file filename The config file to use.\n");
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printf("\nVTY reference generation:\n");
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printf(" --vty-ref-mode MODE VTY reference generation mode (e.g. 'expert').\n");
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printf(" --vty-ref-xml Generate the VTY reference XML output and exit.\n");
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}
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static void handle_long_options(const char *prog_name, const int long_option)
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{
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static int vty_ref_mode = VTY_REF_GEN_MODE_DEFAULT;
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switch (long_option) {
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case 1:
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vty_ref_mode = get_string_value(vty_ref_gen_mode_names, optarg);
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if (vty_ref_mode < 0) {
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fprintf(stderr, "%s: Unknown VTY reference generation "
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"mode '%s'\n", prog_name, optarg);
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exit(2);
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}
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break;
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case 2:
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fprintf(stderr, "Generating the VTY reference in mode '%s' (%s)\n",
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get_value_string(vty_ref_gen_mode_names, vty_ref_mode),
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get_value_string(vty_ref_gen_mode_desc, vty_ref_mode));
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vty_dump_xml_ref_mode(stdout, (enum vty_ref_gen_mode) vty_ref_mode);
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exit(0);
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default:
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fprintf(stderr, "%s: error parsing cmdline options\n", prog_name);
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exit(2);
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}
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}
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static void handle_options(int argc, char **argv)
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{
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while (1) {
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int option_index = 0, c;
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static int long_option = 0;
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static struct option long_options[] = {
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{"help", 0, 0, 'h'},
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{"daemonize", 0, 0, 'D'},
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{"debug", 1, 0, 'd'},
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{"version", 0, 0, 'V'},
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{"disable-color", 0, 0, 's'},
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{"timestamp", 0, 0, 'T'},
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{"log-level", 1, 0, 'e'},
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{"config-file", 1, 0, 'c'},
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{"vty-ref-mode", 1, &long_option, 1},
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{"vty-ref-xml", 0, &long_option, 2},
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{0, 0, 0, 0}
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};
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c = getopt_long(argc, argv, "hd:DsTc:e:",
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long_options, &option_index);
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if (c == -1)
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break;
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switch (c) {
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case 'h':
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print_usage();
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print_help();
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exit(0);
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case 0:
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handle_long_options(argv[0], long_option);
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break;
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case 'D':
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daemonize = 1;
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break;
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case 'd':
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log_parse_category_mask(osmo_stderr_target, optarg);
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break;
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case 'V':
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print_version(1);
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exit(0);
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case 's':
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log_set_use_color(osmo_stderr_target, 0);
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break;
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case 'T':
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log_set_print_timestamp(osmo_stderr_target, 1);
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break;
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case 'e':
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log_set_log_level(osmo_stderr_target, atoi(optarg));
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break;
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case 'c':
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config_file = strdup(optarg);
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break;
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default:
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/* ignore */
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break;
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}
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}
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}
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static void signal_handler(int signum)
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{
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fprintf(stdout, "signal %u received\n", signum);
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switch (signum) {
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case SIGINT:
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exit(0);
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break;
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case SIGABRT:
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/* in case of abort, we want to obtain a talloc report and
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* then run default SIGABRT handler, who will generate coredump
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* and abort the process. abort() should do this for us after we
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* return, but program wouldn't exit if an external SIGABRT is
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* received.
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*/
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talloc_report(tall_vty_ctx, stderr);
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talloc_report_full(tall_srv_ctx, stderr);
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signal(SIGABRT, SIG_DFL);
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raise(SIGABRT);
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break;
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case SIGUSR1:
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talloc_report(tall_vty_ctx, stderr);
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talloc_report_full(tall_srv_ctx, stderr);
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break;
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case SIGHUP:
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osmo_pcap_server_reopen(pcap_server);
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break;
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default:
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break;
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}
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}
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static void talloc_init_ctx()
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{
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tall_srv_ctx = talloc_named_const(NULL, 0, "server");
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msgb_talloc_ctx_init(tall_srv_ctx, 0);
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}
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int main(int argc, char **argv)
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{
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int rc;
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talloc_init_ctx();
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osmo_init_logging2(tall_srv_ctx, &log_info);
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vty_info.copyright = osmopcap_copyright;
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vty_info.tall_ctx = tall_srv_ctx;
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vty_init(&vty_info);
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logging_vty_add_cmds();
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osmo_stats_vty_add_cmds();
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osmo_talloc_vty_add_cmds();
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vty_server_init();
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/* parse options */
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handle_options(argc, argv);
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rate_ctr_init(tall_srv_ctx);
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osmo_stats_init(tall_srv_ctx);
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/* seed the PRNG */
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srand(time(NULL));
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signal(SIGINT, &signal_handler);
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signal(SIGABRT, &signal_handler);
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signal(SIGUSR1, &signal_handler);
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osmo_init_ignore_signals();
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signal(SIGHUP, &signal_handler);
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osmo_tls_init();
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pcap_server = talloc_zero(tall_srv_ctx, struct osmo_pcap_server);
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if (!pcap_server) {
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LOGP(DSERVER, LOGL_ERROR, "Failed to allocate osmo_pcap_server.\n");
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exit(1);
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}
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pcap_server->ctrg = rate_ctr_group_alloc(pcap_server, &pcap_server_group_desc, 0);
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if (!pcap_server->ctrg) {
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LOGP(DSERVER, LOGL_ERROR, "Failed to allocate rate counter.\n");
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exit(1);
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}
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INIT_LLIST_HEAD(&pcap_server->conn);
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pcap_server->base_path = talloc_strdup(pcap_server, "./");
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pcap_server->permission_mask = 0440;
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pcap_server->max_size = 1073741824;
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pcap_server->max_snaplen = DEFAULT_SNAPLEN;
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if (vty_read_config_file(config_file, NULL) < 0) {
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LOGP(DSERVER, LOGL_ERROR,
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"Failed to parse the config file: %s\n", config_file);
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exit(1);
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}
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rc = telnet_init_default(tall_srv_ctx, NULL, OSMO_VTY_PORT_PCAP_SERVER);
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if (rc < 0) {
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LOGP(DCLIENT, LOGL_ERROR, "Failed to bind telnet interface\n");
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exit(1);
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}
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osmo_tls_server_init(pcap_server);
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/* attempt to connect to the remote */
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if (osmo_pcap_server_listen(pcap_server) != 0) {
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LOGP(DSERVER, LOGL_ERROR,
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"Failed to listen for incoming data\n");
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exit(1);
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}
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if (daemonize) {
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rc = osmo_daemonize();
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if (rc < 0) {
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perror("Error during daemonize");
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exit(1);
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}
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}
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while (1) {
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osmo_select_main(0);
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}
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return(0);
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}
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