diff options
Diffstat (limited to 'test/rtp.c')
| -rw-r--r-- | test/rtp.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/test/rtp.c b/test/rtp.c new file mode 100644 index 0000000..69968f3 --- /dev/null +++ b/test/rtp.c @@ -0,0 +1,167 @@ +/* + * rtp.c + * + * library functions for the real-time transport protocol + * + * David A. McGrew + * Cisco Systems, Inc. + */ + + +#include "rtp_priv.h" + +#include <stdio.h> +#include <string.h> + +#include <sys/types.h> +#ifdef HAVE_SYS_SOCKET_H +# include <sys/socket.h> +#endif + +#define PRINT_DEBUG 0 /* set to 1 to print out debugging data */ +#define VERBOSE_DEBUG 0 /* set to 1 to print out more data */ + +unsigned int +rtp_sendto(rtp_sender_t sender, const void* msg, int len) { + int octets_sent; + err_status_t stat; + int pkt_len = len + RTP_HEADER_LEN; + + /* marshal data */ + strncpy(sender->message.body, msg, len); + + /* update header */ + sender->message.header.seq = ntohs(sender->message.header.seq) + 1; + sender->message.header.seq = htons(sender->message.header.seq); + sender->message.header.ts = ntohl(sender->message.header.ts) + 1; + sender->message.header.ts = htonl(sender->message.header.ts); + + /* apply srtp */ + stat = srtp_protect(sender->srtp_ctx, &sender->message.header, &pkt_len); + if (stat) { +#if PRINT_DEBUG + fprintf(stderr, "error: srtp protection failed with code %d\n", stat); +#endif + return -1; + } +#if VERBOSE_DEBUG + srtp_print_packet(&sender->message.header, pkt_len); +#endif + octets_sent = sendto(sender->socket, (void*)&sender->message, + pkt_len, 0, (struct sockaddr *)&sender->addr, + sizeof (struct sockaddr_in)); + + if (octets_sent != pkt_len) { +#if PRINT_DEBUG + fprintf(stderr, "error: couldn't send message %s", (char *)msg); + perror(""); +#endif + } + + return octets_sent; +} + +unsigned int +rtp_recvfrom(rtp_receiver_t receiver, void *msg, int *len) { + int octets_recvd; + err_status_t stat; + + octets_recvd = recvfrom(receiver->socket, (void *)&receiver->message, + *len, 0, (struct sockaddr *) NULL, 0); + + /* verify rtp header */ + if (receiver->message.header.version != 2) { + *len = 0; + return -1; + } + +#if PRINT_DEBUG + fprintf(stderr, "%d octets received from SSRC %u\n", + octets_recvd, receiver->message.header.ssrc); +#endif +#if VERBOSE_DEBUG + srtp_print_packet(&receiver->message.header, octets_recvd); +#endif + + /* apply srtp */ + stat = srtp_unprotect(receiver->srtp_ctx, + &receiver->message.header, &octets_recvd); + if (stat) { + fprintf(stderr, + "error: srtp unprotection failed with code %d%s\n", stat, + stat == err_status_replay_fail ? " (replay check failed)" : + stat == err_status_auth_fail ? " (auth check failed)" : ""); + return -1; + } + strncpy(msg, receiver->message.body, octets_recvd); + + return octets_recvd; +} + +int +rtp_sender_init(rtp_sender_t sender, + int socket, + struct sockaddr_in addr, + unsigned int ssrc) { + + /* set header values */ + sender->message.header.ssrc = htonl(ssrc); + sender->message.header.ts = 0; + sender->message.header.seq = (uint16_t) rand(); + sender->message.header.m = 0; + sender->message.header.pt = 0x1; + sender->message.header.version = 2; + sender->message.header.p = 0; + sender->message.header.x = 0; + sender->message.header.cc = 0; + + /* set other stuff */ + sender->socket = socket; + sender->addr = addr; + + return 0; +} + +int +rtp_receiver_init(rtp_receiver_t rcvr, + int socket, + struct sockaddr_in addr, + unsigned int ssrc) { + + /* set header values */ + rcvr->message.header.ssrc = htonl(ssrc); + rcvr->message.header.ts = 0; + rcvr->message.header.seq = 0; + rcvr->message.header.m = 0; + rcvr->message.header.pt = 0x1; + rcvr->message.header.version = 2; + rcvr->message.header.p = 0; + rcvr->message.header.x = 0; + rcvr->message.header.cc = 0; + + /* set other stuff */ + rcvr->socket = socket; + rcvr->addr = addr; + + return 0; +} + +int +rtp_sender_init_srtp(rtp_sender_t sender, const srtp_policy_t *policy) { + return srtp_create(&sender->srtp_ctx, policy); +} + +int +rtp_receiver_init_srtp(rtp_receiver_t sender, const srtp_policy_t *policy) { + return srtp_create(&sender->srtp_ctx, policy); +} + +rtp_sender_t +rtp_sender_alloc() { + return (rtp_sender_t)malloc(sizeof(rtp_sender_ctx_t)); +} + +rtp_receiver_t +rtp_receiver_alloc() { + return (rtp_receiver_t)malloc(sizeof(rtp_receiver_ctx_t)); +} |