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-rw-r--r--srtp/test/rtpw.c519
1 files changed, 519 insertions, 0 deletions
diff --git a/srtp/test/rtpw.c b/srtp/test/rtpw.c
new file mode 100644
index 0000000..e477a77
--- /dev/null
+++ b/srtp/test/rtpw.c
@@ -0,0 +1,519 @@
+/*
+ * rtpw.c
+ *
+ * rtp word sender/receiver
+ *
+ * David A. McGrew
+ * Cisco Systems, Inc.
+ *
+ * This app is a simple RTP application intended only for testing
+ * libsrtp. It reads one word at a time from /usr/dict/words (or
+ * whatever file is specified as DICT_FILE), and sends one word out
+ * each USEC_RATE microseconds. Secure RTP protections can be
+ * applied. See the usage() function for more details.
+ *
+ */
+
+/*
+ *
+ * Copyright (c) 2001-2006, Cisco Systems, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 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.
+ *
+ * Neither the name of the Cisco Systems, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
+ * COPYRIGHT HOLDERS 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.
+ *
+ */
+
+
+#include "datatypes.h"
+#include "getopt_s.h" /* for local getopt() */
+
+#include <stdio.h> /* for printf, fprintf */
+#include <stdlib.h> /* for atoi() */
+#include <errno.h>
+#include <unistd.h> /* for close() */
+
+#include <string.h> /* for strncpy() */
+#include <time.h> /* for usleep() */
+#ifdef HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#elif defined HAVE_WINSOCK2_H
+# include <winsock2.h>
+# include <ws2tcpip.h>
+# define RTPW_USE_WINSOCK2 1
+#endif
+#ifdef HAVE_ARPA_INET_H
+# include <arpa/inet.h>
+#endif
+
+#include "srtp.h"
+#include "rtp.h"
+
+#ifdef RTPW_USE_WINSOCK2
+# define DICT_FILE "words.txt"
+#else
+# define DICT_FILE "/usr/share/dict/words"
+#endif
+#define USEC_RATE (5e5)
+#define MAX_WORD_LEN 128
+#define ADDR_IS_MULTICAST(a) IN_MULTICAST(htonl(a))
+#define MAX_KEY_LEN 64
+#define MASTER_KEY_LEN 30
+
+
+#ifndef HAVE_USLEEP
+# ifdef HAVE_WINDOWS_H
+# define usleep(us) Sleep((us)/1000)
+# else
+# define usleep(us) sleep((us)/1000000)
+# endif
+#endif
+
+
+/*
+ * the function usage() prints an error message describing how this
+ * program should be called, then calls exit()
+ */
+
+void
+usage(char *prog_name);
+
+/*
+ * leave_group(...) de-registers from a multicast group
+ */
+
+void
+leave_group(int sock, struct ip_mreq mreq, char *name);
+
+
+/*
+ * program_type distinguishes the [s]rtp sender and receiver cases
+ */
+
+typedef enum { sender, receiver, unknown } program_type;
+
+int
+main (int argc, char *argv[]) {
+ char *dictfile = DICT_FILE;
+ FILE *dict;
+ char word[MAX_WORD_LEN];
+ int sock, ret;
+ struct in_addr rcvr_addr;
+ struct sockaddr_in name;
+ struct ip_mreq mreq;
+#if BEW
+ struct sockaddr_in local;
+#endif
+ program_type prog_type = unknown;
+ sec_serv_t sec_servs = sec_serv_none;
+ unsigned char ttl = 5;
+ int c;
+ char *input_key = NULL;
+ char *address = NULL;
+ char key[MAX_KEY_LEN];
+ unsigned short port = 0;
+ rtp_sender_t snd;
+ srtp_policy_t policy;
+ err_status_t status;
+ int len;
+ int do_list_mods = 0;
+ uint32_t ssrc = 0xdeadbeef; /* ssrc value hardcoded for now */
+#ifdef RTPW_USE_WINSOCK2
+ WORD wVersionRequested = MAKEWORD(2, 0);
+ WSADATA wsaData;
+
+ ret = WSAStartup(wVersionRequested, &wsaData);
+ if (ret != 0) {
+ fprintf(stderr, "error: WSAStartup() failed: %d\n", ret);
+ exit(1);
+ }
+#endif
+
+ /* initialize srtp library */
+ status = srtp_init();
+ if (status) {
+ printf("error: srtp initialization failed with error code %d\n", status);
+ exit(1);
+ }
+
+ /* check args */
+ while (1) {
+ c = getopt_s(argc, argv, "k:rsaeld:");
+ if (c == -1) {
+ break;
+ }
+ switch (c) {
+ case 'k':
+ input_key = optarg_s;
+ break;
+ case 'e':
+ sec_servs |= sec_serv_conf;
+ break;
+ case 'a':
+ sec_servs |= sec_serv_auth;
+ break;
+ case 'r':
+ prog_type = receiver;
+ break;
+ case 's':
+ prog_type = sender;
+ break;
+ case 'd':
+ status = crypto_kernel_set_debug_module(optarg_s, 1);
+ if (status) {
+ printf("error: set debug module (%s) failed\n", optarg_s);
+ exit(1);
+ }
+ break;
+ case 'l':
+ do_list_mods = 1;
+ break;
+ default:
+ usage(argv[0]);
+ }
+ }
+
+ if (prog_type == unknown) {
+ if (do_list_mods) {
+ status = crypto_kernel_list_debug_modules();
+ if (status) {
+ printf("error: list of debug modules failed\n");
+ exit(1);
+ }
+ return 0;
+ } else {
+ printf("error: neither sender [-s] nor receiver [-r] specified\n");
+ usage(argv[0]);
+ }
+ }
+
+ if ((sec_servs && !input_key) || (!sec_servs && input_key)) {
+ /*
+ * a key must be provided if and only if security services have
+ * been requested
+ */
+ usage(argv[0]);
+ }
+
+ if (argc != optind_s + 2) {
+ /* wrong number of arguments */
+ usage(argv[0]);
+ }
+
+ /* get address from arg */
+ address = argv[optind_s++];
+
+ /* get port from arg */
+ port = atoi(argv[optind_s++]);
+
+ /* set address */
+#ifdef HAVE_INET_ATON
+ if (0 == inet_aton(address, &rcvr_addr)) {
+ fprintf(stderr, "%s: cannot parse IP v4 address %s\n", argv[0], address);
+ exit(1);
+ }
+ if (rcvr_addr.s_addr == INADDR_NONE) {
+ fprintf(stderr, "%s: address error", argv[0]);
+ exit(1);
+ }
+#else
+ rcvr_addr.s_addr = inet_addr(address);
+ if (0xffffffff == rcvr_addr.s_addr) {
+ fprintf(stderr, "%s: cannot parse IP v4 address %s\n", argv[0], address);
+ exit(1);
+ }
+#endif
+
+ /* open socket */
+ sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
+ if (sock < 0) {
+ int err;
+#ifdef RTPW_USE_WINSOCK2
+ err = WSAGetLastError();
+#else
+ err = errno;
+#endif
+ fprintf(stderr, "%s: couldn't open socket: %d\n", argv[0], err);
+ exit(1);
+ }
+
+ name.sin_addr = rcvr_addr;
+ name.sin_family = PF_INET;
+ name.sin_port = htons(port);
+
+ if (ADDR_IS_MULTICAST(rcvr_addr.s_addr)) {
+ if (prog_type == sender) {
+ ret = setsockopt(sock, IPPROTO_IP, IP_MULTICAST_TTL, &ttl,
+ sizeof(ttl));
+ if (ret < 0) {
+ fprintf(stderr, "%s: Failed to set TTL for multicast group", argv[0]);
+ perror("");
+ exit(1);
+ }
+ }
+
+ mreq.imr_multiaddr.s_addr = rcvr_addr.s_addr;
+ mreq.imr_interface.s_addr = htonl(INADDR_ANY);
+ ret = setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, (void*)&mreq,
+ sizeof(mreq));
+ if (ret < 0) {
+ fprintf(stderr, "%s: Failed to join multicast group", argv[0]);
+ perror("");
+ exit(1);
+ }
+ }
+
+ /* report security services selected on the command line */
+ printf("security services: ");
+ if (sec_servs & sec_serv_conf)
+ printf("confidentiality ");
+ if (sec_servs & sec_serv_auth)
+ printf("message authentication");
+ if (sec_servs == sec_serv_none)
+ printf("none");
+ printf("\n");
+
+ /* set up the srtp policy and master key */
+ if (sec_servs) {
+ /*
+ * create policy structure, using the default mechanisms but
+ * with only the security services requested on the command line,
+ * using the right SSRC value
+ */
+ switch (sec_servs) {
+ case sec_serv_conf_and_auth:
+ crypto_policy_set_rtp_default(&policy.rtp);
+ crypto_policy_set_rtcp_default(&policy.rtcp);
+ break;
+ case sec_serv_conf:
+ crypto_policy_set_aes_cm_128_null_auth(&policy.rtp);
+ crypto_policy_set_rtcp_default(&policy.rtcp);
+ break;
+ case sec_serv_auth:
+ crypto_policy_set_null_cipher_hmac_sha1_80(&policy.rtp);
+ crypto_policy_set_rtcp_default(&policy.rtcp);
+ break;
+ default:
+ printf("error: unknown security service requested\n");
+ return -1;
+ }
+ policy.ssrc.type = ssrc_specific;
+ policy.ssrc.value = ssrc;
+ policy.key = (uint8_t *) key;
+ policy.next = NULL;
+ policy.rtp.sec_serv = sec_servs;
+ policy.rtcp.sec_serv = sec_serv_none; /* we don't do RTCP anyway */
+
+ /*
+ * read key from hexadecimal on command line into an octet string
+ */
+ len = hex_string_to_octet_string(key, input_key, MASTER_KEY_LEN*2);
+
+ /* check that hex string is the right length */
+ if (len < MASTER_KEY_LEN*2) {
+ fprintf(stderr,
+ "error: too few digits in key/salt "
+ "(should be %d hexadecimal digits, found %d)\n",
+ MASTER_KEY_LEN*2, len);
+ exit(1);
+ }
+ if (strlen(input_key) > MASTER_KEY_LEN*2) {
+ fprintf(stderr,
+ "error: too many digits in key/salt "
+ "(should be %d hexadecimal digits, found %u)\n",
+ MASTER_KEY_LEN*2, (unsigned)strlen(input_key));
+ exit(1);
+ }
+
+ printf("set master key/salt to %s/", octet_string_hex_string(key, 16));
+ printf("%s\n", octet_string_hex_string(key+16, 14));
+
+ } else {
+ /*
+ * we're not providing security services, so set the policy to the
+ * null policy
+ *
+ * Note that this policy does not conform to the SRTP
+ * specification, since RTCP authentication is required. However,
+ * the effect of this policy is to turn off SRTP, so that this
+ * application is now a vanilla-flavored RTP application.
+ */
+ policy.key = (uint8_t *)key;
+ policy.ssrc.type = ssrc_specific;
+ policy.ssrc.value = ssrc;
+ policy.rtp.cipher_type = NULL_CIPHER;
+ policy.rtp.cipher_key_len = 0;
+ policy.rtp.auth_type = NULL_AUTH;
+ policy.rtp.auth_key_len = 0;
+ policy.rtp.auth_tag_len = 0;
+ policy.rtp.sec_serv = sec_serv_none;
+ policy.rtcp.cipher_type = NULL_CIPHER;
+ policy.rtcp.cipher_key_len = 0;
+ policy.rtcp.auth_type = NULL_AUTH;
+ policy.rtcp.auth_key_len = 0;
+ policy.rtcp.auth_tag_len = 0;
+ policy.rtcp.sec_serv = sec_serv_none;
+ policy.next = NULL;
+ }
+
+ if (prog_type == sender) {
+
+#if BEW
+ /* bind to local socket (to match crypto policy, if need be) */
+ memset(&local, 0, sizeof(struct sockaddr_in));
+ local.sin_addr.s_addr = htonl(INADDR_ANY);
+ local.sin_port = htons(port);
+ ret = bind(sock, (struct sockaddr *) &local, sizeof(struct sockaddr_in));
+ if (ret < 0) {
+ fprintf(stderr, "%s: bind failed\n", argv[0]);
+ perror("");
+ exit(1);
+ }
+#endif /* BEW */
+
+ /* initialize sender's rtp and srtp contexts */
+ snd = rtp_sender_alloc();
+ if (snd == NULL) {
+ fprintf(stderr, "error: malloc() failed\n");
+ exit(1);
+ }
+ rtp_sender_init(snd, sock, name, ssrc);
+ status = rtp_sender_init_srtp(snd, &policy);
+ if (status) {
+ fprintf(stderr,
+ "error: srtp_create() failed with code %d\n",
+ status);
+ exit(1);
+ }
+
+ /* open dictionary */
+ dict = fopen (dictfile, "r");
+ if (dict == NULL) {
+ fprintf(stderr, "%s: couldn't open file %s\n", argv[0], dictfile);
+ if (ADDR_IS_MULTICAST(rcvr_addr.s_addr)) {
+ leave_group(sock, mreq, argv[0]);
+ }
+ exit(1);
+ }
+
+ /* read words from dictionary, then send them off */
+ while (fgets(word, MAX_WORD_LEN, dict) != NULL) {
+ len = strlen(word) + 1; /* plus one for null */
+
+ if (len > MAX_WORD_LEN)
+ printf("error: word %s too large to send\n", word);
+ else {
+ rtp_sendto(snd, word, len);
+ printf("sending word: %s", word);
+ }
+ usleep(USEC_RATE);
+ }
+
+ } else { /* prog_type == receiver */
+ rtp_receiver_t rcvr;
+
+ if (bind(sock, (struct sockaddr *)&name, sizeof(name)) < 0) {
+ close(sock);
+ fprintf(stderr, "%s: socket bind error\n", argv[0]);
+ perror(NULL);
+ if (ADDR_IS_MULTICAST(rcvr_addr.s_addr)) {
+ leave_group(sock, mreq, argv[0]);
+ }
+ exit(1);
+ }
+
+ rcvr = rtp_receiver_alloc();
+ if (rcvr == NULL) {
+ fprintf(stderr, "error: malloc() failed\n");
+ exit(1);
+ }
+ rtp_receiver_init(rcvr, sock, name, ssrc);
+ status = rtp_receiver_init_srtp(rcvr, &policy);
+ if (status) {
+ fprintf(stderr,
+ "error: srtp_create() failed with code %d\n",
+ status);
+ exit(1);
+ }
+
+ /* get next word and loop */
+ while (1) {
+ len = MAX_WORD_LEN;
+ if (rtp_recvfrom(rcvr, word, &len) > -1)
+ printf("\tword: %s", word);
+ }
+
+ }
+
+ if (ADDR_IS_MULTICAST(rcvr_addr.s_addr)) {
+ leave_group(sock, mreq, argv[0]);
+ }
+
+#ifdef RTPW_USE_WINSOCK2
+ WSACleanup();
+#endif
+
+ return 0;
+}
+
+
+void
+usage(char *string) {
+
+ printf("usage: %s [-d <debug>]* [-k <key> [-a][-e]] "
+ "[-s | -r] dest_ip dest_port\n"
+ "or %s -l\n"
+ "where -a use message authentication\n"
+ " -e use encryption\n"
+ " -k <key> sets the srtp master key\n"
+ " -s act as rtp sender\n"
+ " -r act as rtp receiver\n"
+ " -l list debug modules\n"
+ " -d <debug> turn on debugging for module <debug>\n",
+ string, string);
+ exit(1);
+
+}
+
+
+void
+leave_group(int sock, struct ip_mreq mreq, char *name) {
+ int ret;
+
+ ret = setsockopt(sock, IPPROTO_IP, IP_DROP_MEMBERSHIP, (void*)&mreq,
+ sizeof(mreq));
+ if (ret < 0) {
+ fprintf(stderr, "%s: Failed to leave multicast group", name);
+ perror("");
+ }
+}
+
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