mirror of
https://github.com/cesanta/mongoose.git
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142 lines
3.8 KiB
C
142 lines
3.8 KiB
C
// Copyright (c) 2014 Cesanta Software Limited
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// All rights reserved
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//
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// This software is dual-licensed: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License version 2 as
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// published by the Free Software Foundation. For the terms of this
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// license, see <http://www.gnu.org/licenses/>.
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//
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// You are free to use this software under the terms of the GNU General
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// Public License, but WITHOUT ANY WARRANTY; without even the implied
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// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU General Public License for more details.
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//
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// Alternatively, you can license this software under a commercial
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// license, as set out in <https://www.cesanta.com/license>.
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//
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// $Date: 2014-09-28 05:04:41 UTC $
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// This file implements "netcat" utility with SSL and traffic hexdump.
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#include "mongoose.h"
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static sig_atomic_t s_received_signal = 0;
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static void signal_handler(int sig_num) {
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signal(sig_num, signal_handler);
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s_received_signal = sig_num;
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}
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static void show_usage_and_exit(const char *prog_name) {
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fprintf(stderr, "%s\n", "Copyright (c) 2014 CESANTA SOFTWARE");
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fprintf(stderr, "%s\n", "Usage:");
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fprintf(stderr,
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" %s\n [-d debug_file] [-l] [tcp|ssl]://[ip:]port[:cert][:ca_cert]",
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prog_name);
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fprintf(stderr, "%s\n", "Examples:");
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fprintf(stderr, " %s\n -d hexdump.txt ssl://google.com:443", prog_name);
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fprintf(stderr, " %s\n -l ssl://443:ssl_cert.pem", prog_name);
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fprintf(stderr, " %s\n -l tcp://8080", prog_name);
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exit(EXIT_FAILURE);
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}
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static void on_stdin_read(struct mg_connection *nc, int ev, void *p) {
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int ch = *(int *) p;
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(void) ev;
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if (ch < 0) {
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// EOF is received from stdin. Schedule the connection to close
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nc->flags |= MG_F_SEND_AND_CLOSE;
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if (nc->send_mbuf.len <= 0) {
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nc->flags |= MG_F_CLOSE_IMMEDIATELY;
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}
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} else {
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// A character is received from stdin. Send it to the connection.
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unsigned char c = (unsigned char) ch;
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mg_send(nc, &c, 1);
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}
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}
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static void *stdio_thread_func(void *param) {
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struct mg_mgr *mgr = (struct mg_mgr *) param;
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int ch;
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// Read stdin until EOF character by character, sending them to the mgr
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while ((ch = getchar()) != EOF) {
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mg_broadcast(mgr, on_stdin_read, &ch, sizeof(ch));
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}
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s_received_signal = 1;
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return NULL;
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}
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static void ev_handler(struct mg_connection *nc, int ev, void *p) {
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(void) p;
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switch (ev) {
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case MG_EV_ACCEPT:
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case MG_EV_CONNECT:
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mg_start_thread(stdio_thread_func, nc->mgr);
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break;
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case MG_EV_CLOSE:
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s_received_signal = 1;
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break;
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case MG_EV_RECV:
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fwrite(nc->recv_mbuf.buf, 1, nc->recv_mbuf.len, stdout);
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mbuf_remove(&nc->recv_mbuf, nc->recv_mbuf.len);
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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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int main(int argc, char *argv[]) {
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struct mg_mgr mgr;
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int i, is_listening = 0;
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const char *address = NULL;
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mg_mgr_init(&mgr, NULL);
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// Parse command line options
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for (i = 1; i < argc && argv[i][0] == '-'; i++) {
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if (strcmp(argv[i], "-l") == 0) {
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is_listening = 1;
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} else if (strcmp(argv[i], "-d") == 0 && i + 1 < argc) {
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mgr.hexdump_file = argv[++i];
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} else {
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show_usage_and_exit(argv[0]);
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}
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}
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if (i + 1 == argc) {
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address = argv[i];
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} else {
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show_usage_and_exit(argv[0]);
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}
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signal(SIGTERM, signal_handler);
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signal(SIGINT, signal_handler);
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signal(SIGPIPE, SIG_IGN);
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if (is_listening) {
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if (mg_bind(&mgr, address, ev_handler) == NULL) {
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fprintf(stderr, "mg_bind(%s) failed\n", address);
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exit(EXIT_FAILURE);
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}
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} else if (mg_connect(&mgr, address, ev_handler) == NULL) {
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fprintf(stderr, "mg_connect(%s) failed\n", address);
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exit(EXIT_FAILURE);
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}
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while (s_received_signal == 0) {
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mg_mgr_poll(&mgr, 1000);
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}
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mg_mgr_free(&mgr);
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return EXIT_SUCCESS;
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}
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