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cltest.c
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srvtest.c
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Editing: srvtest.c
/* $NetBSD: srvtest.c,v 1.10 2015/05/30 22:40:38 christos Exp $ */ /*- * Copyright (c) 2015 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Christos Zoulas. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <sys/cdefs.h> __RCSID("$NetBSD: srvtest.c,v 1.10 2015/05/30 22:40:38 christos Exp $"); #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <stdio.h> #include <signal.h> #include <string.h> #include <syslog.h> #include <unistd.h> #include <stdlib.h> #include <poll.h> #include <err.h> #include "blacklist.h" #ifdef BLDEBUG #include "bl.h" static void *b; #endif #ifndef INFTIM #define INFTIM -1 #endif static void process_tcp(int afd) { ssize_t n; char buffer[256]; memset(buffer, 0, sizeof(buffer)); if ((n = read(afd, buffer, sizeof(buffer))) == -1) err(1, "read"); buffer[sizeof(buffer) - 1] = '\0'; printf("%s: sending %d %s\n", getprogname(), afd, buffer); #ifdef BLDEBUG blacklist_r(b, 1, afd, buffer); #else blacklist(1, afd, buffer); #endif exit(0); } static void process_udp(int afd) { ssize_t n; char buffer[256]; struct sockaddr_storage ss; socklen_t slen; memset(buffer, 0, sizeof(buffer)); slen = (socklen_t)sizeof(ss); memset(&ss, 0, sizeof(ss)); if ((n = recvfrom(afd, buffer, sizeof(buffer), 0, (void *)&ss, &slen)) == -1) err(1, "recvfrom"); buffer[sizeof(buffer) - 1] = '\0'; printf("%s: sending %d %s\n", getprogname(), afd, buffer); blacklist_sa(1, afd, (void *)&ss, slen, buffer); exit(0); } static int cr(int af, int type, in_port_t p) { int sfd; struct sockaddr_storage ss; socklen_t slen; sfd = socket(af == AF_INET ? PF_INET : PF_INET6, type, 0); if (sfd == -1) err(1, "socket"); p = htons(p); memset(&ss, 0, sizeof(ss)); if (af == AF_INET) { struct sockaddr_in *s = (void *)&ss; s->sin_family = AF_INET; slen = sizeof(*s); s->sin_port = p; } else { struct sockaddr_in6 *s6 = (void *)&ss; s6->sin6_family = AF_INET6; slen = sizeof(*s6); s6->sin6_port = p; } #ifdef HAVE_STRUCT_SOCKADDR_SA_LEN ss.ss_len = (uint8_t)slen; #endif if (bind(sfd, (const void *)&ss, slen) == -1) err(1, "bind"); if (type != SOCK_DGRAM) if (listen(sfd, 5) == -1) err(1, "listen"); return sfd; } static void handle(int type, int sfd) { struct sockaddr_storage ss; socklen_t alen = sizeof(ss); int afd; if (type != SOCK_DGRAM) { if ((afd = accept(sfd, (void *)&ss, &alen)) == -1) err(1, "accept"); } else afd = sfd; /* Create child process */ switch (fork()) { case -1: err(1, "fork"); case 0: if (type == SOCK_DGRAM) process_udp(afd); else process_tcp(afd); break; default: close(afd); break; } } static __dead void usage(int c) { warnx("Unknown option `%c'", (char)c); fprintf(stderr, "Usage: %s [-u] [-p <num>]\n", getprogname()); exit(EXIT_FAILURE); } int main(int argc, char *argv[]) { #ifdef __linux__ #define NUMFD 1 #else #define NUMFD 2 #endif struct pollfd pfd[NUMFD]; int type = SOCK_STREAM, c; in_port_t port = 6161; signal(SIGCHLD, SIG_IGN); #ifdef BLDEBUG b = bl_create(false, "blsock", vsyslog); #endif while ((c = getopt(argc, argv, "up:")) != -1) switch (c) { case 'u': type = SOCK_DGRAM; break; case 'p': port = (in_port_t)atoi(optarg); break; default: usage(c); } pfd[0].fd = cr(AF_INET, type, port); pfd[0].events = POLLIN; #if NUMFD > 1 pfd[1].fd = cr(AF_INET6, type, port); pfd[1].events = POLLIN; #endif for (;;) { if (poll(pfd, __arraycount(pfd), INFTIM) == -1) err(1, "poll"); for (size_t i = 0; i < __arraycount(pfd); i++) { if ((pfd[i].revents & POLLIN) == 0) continue; handle(type, pfd[i].fd); } } }
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