+/*
+ * This file is part of DisOrder
+ * Copyright (C) 2007 Richard Kettlewell
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#include <config.h>
+#include "types.h"
+
+#include <getopt.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <errno.h>
+#include <locale.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <ctype.h>
+
+#include "configuration.h"
+#include "syscalls.h"
+#include "log.h"
+#include "addr.h"
+#include "defs.h"
+#include "mem.h"
+
+static const struct option options[] = {
+ { "help", no_argument, 0, 'h' },
+ { "version", no_argument, 0, 'V' },
+ { "output", required_argument, 0, 'o' },
+ { 0, 0, 0, 0 }
+};
+
+/* display usage message and terminate */
+static void help(void) {
+ xprintf("Usage:\n"
+ " disorder-udplog [OPTIONS] ADDRESS PORT\n"
+ "Options:\n"
+ " --output, -o PATH Output to PATH (default: stdout)\n"
+ " --help, -h Display usage message\n"
+ " --version, -V Display version number\n"
+ "\n"
+ "UDP packet receiver.\n");
+ xfclose(stdout);
+ exit(0);
+}
+
+/* display version number and terminate */
+static void version(void) {
+ xprintf("disorder-udplog version %s\n", disorder_version_string);
+ xfclose(stdout);
+ exit(0);
+}
+
+int main(int argc, char **argv) {
+ int n, fd, err, i, j;
+ struct addrinfo *ai;
+ struct stringlist a;
+ char *name, h[4096], s[4096];
+ uint8_t buffer[4096];
+ union {
+ struct sockaddr sa;
+ struct sockaddr_in sin;
+ struct sockaddr_in6 sin6;
+ } sa;
+ socklen_t len;
+ static const struct addrinfo pref = {
+ 0, /* ai_flags */
+ AF_UNSPEC, /* ai_family */
+ SOCK_DGRAM, /* ai_socktype */
+ IPPROTO_UDP, /* ai_protocol */
+ 0,
+ 0,
+ 0,
+ 0
+ };
+
+ set_progname(argv);
+ mem_init();
+ if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale");
+ while((n = getopt_long(argc, argv, "hVo:", options, 0)) >= 0) {
+ switch(n) {
+ case 'h': help();
+ case 'V': version();
+ case 'o':
+ if(!freopen(optarg, "w", stdout))
+ fatal(errno, "%s", optarg);
+ break;
+ default: fatal(0, "invalid option");
+ }
+ }
+ if(optind + 2 != argc)
+ fatal(0, "missing arguments");
+ a.n = 2;
+ a.s = &argv[optind];
+ if(!(ai = get_address(&a, &pref, &name)))
+ exit(1);
+ fd = xsocket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+ if(bind(fd, ai->ai_addr, ai->ai_addrlen) < 0)
+ fatal(errno, "error binding to %s", name);
+ while(getppid() != 1) {
+ len = sizeof sa;
+ n = recvfrom(fd, buffer, sizeof buffer, 0, &sa.sa, &len);
+ if(n < 0) {
+ if(errno == EINTR || errno == EAGAIN)
+ continue;
+ fatal(errno, "%s: recvfrom", name);
+ }
+ if((err = getnameinfo(&sa.sa, len, h, sizeof h, s, sizeof s,
+ NI_NUMERICHOST|NI_NUMERICSERV|NI_DGRAM)))
+ fatal(0, "getnameinfo: %s", gai_strerror(err));
+ xprintf("from host %s service %s: %d bytes\n", h, s, n);
+ for(i = 0; i < n; i += 16) {
+ for(j = i; j < n && j < i + 16; ++j)
+ xprintf(" %02x", buffer[j]);
+ for(; j < i + 16; ++j)
+ xprintf(" ");
+ xprintf(" ");
+ for(j = i; j < n && j < i + 16; ++j)
+ xprintf("%c", buffer[j] < 128 && isprint(buffer[j]) ? buffer[j] : '.');
+ xprintf("\n");
+ if(fflush(stdout) < 0)
+ fatal(errno, "stdout");
+ }
+ }
+ return 0;
+}
+
+/*
+Local Variables:
+c-basic-offset:2
+comment-column:40
+fill-column:79
+indent-tabs-mode:nil
+End:
+*/