diff --git a/libavformat/Makefile b/libavformat/Makefile index 565b2972d3..ad6b323f6b 100644 --- a/libavformat/Makefile +++ b/libavformat/Makefile @@ -159,7 +159,7 @@ OBJS-$(CONFIG_RTP_MUXER) += rtp.o \ rtp_aac.o \ rtpenc_h264.o \ avc.o -OBJS-$(CONFIG_RTSP_DEMUXER) += rtsp.o +OBJS-$(CONFIG_RTSP_DEMUXER) += rdt.o rtsp.o OBJS-$(CONFIG_SDP_DEMUXER) += rtsp.o rtp.o rtpdec.o rtp_h264.o OBJS-$(CONFIG_SEGAFILM_DEMUXER) += segafilm.o OBJS-$(CONFIG_SHORTEN_DEMUXER) += raw.o diff --git a/libavformat/rdt.c b/libavformat/rdt.c new file mode 100644 index 0000000000..1d0e4559d0 --- /dev/null +++ b/libavformat/rdt.c @@ -0,0 +1,73 @@ +/* + * Realmedia RTSP protocol (RDT) support. + * Copyright (c) 2007 Ronald S. Bultje + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file rdt.c + * @brief Realmedia RTSP protocol (RDT) support + * @author Ronald S. Bultje + */ + +#include "avformat.h" +#include "libavutil/avstring.h" +#include "rdt.h" +#include "libavutil/base64.h" +#include "libavutil/md5.h" +#include "rm.h" +#include "internal.h" + +void +ff_rdt_calc_response_and_checksum(char response[41], char chksum[9], + const char *challenge) +{ + int ch_len = strlen (challenge), i; + unsigned char zres[16], + buf[64] = { 0xa1, 0xe9, 0x14, 0x9d, 0x0e, 0x6b, 0x3b, 0x59 }; +#define XOR_TABLE_SIZE 37 + const unsigned char xor_table[XOR_TABLE_SIZE] = { + 0x05, 0x18, 0x74, 0xd0, 0x0d, 0x09, 0x02, 0x53, + 0xc0, 0x01, 0x05, 0x05, 0x67, 0x03, 0x19, 0x70, + 0x08, 0x27, 0x66, 0x10, 0x10, 0x72, 0x08, 0x09, + 0x63, 0x11, 0x03, 0x71, 0x08, 0x08, 0x70, 0x02, + 0x10, 0x57, 0x05, 0x18, 0x54 }; + + /* some (length) checks */ + if (ch_len == 40) /* what a hack... */ + ch_len = 32; + else if (ch_len > 56) + ch_len = 56; + memcpy(buf + 8, challenge, ch_len); + + /* xor challenge bytewise with xor_table */ + for (i = 0; i < XOR_TABLE_SIZE; i++) + buf[8 + i] ^= xor_table[i]; + + av_md5_sum(zres, buf, 64); + ff_data_to_hex(response, zres, 16); + for (i=0;i<32;i++) response[i] = tolower(response[i]); + + /* add tail */ + strcpy (response + 32, "01d0a8e3"); + + /* calculate checksum */ + for (i = 0; i < 8; i++) + chksum[i] = response[i * 4]; + chksum[8] = 0; +} diff --git a/libavformat/rdt.h b/libavformat/rdt.h new file mode 100644 index 0000000000..f7aad6dfc9 --- /dev/null +++ b/libavformat/rdt.h @@ -0,0 +1,40 @@ +/* + * Realmedia RTSP (RDT) definitions + * Copyright (c) 2007 Ronald S. Bultje + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVFORMAT_RDT_H +#define AVFORMAT_RDT_H + +/** + * Calculate the response (RealChallenge2 in the RTSP header) to the + * challenge (RealChallenge1 in the RTSP header from the Real/Helix + * server), which is used as some sort of client validation. + * + * @param response pointer to response buffer, it should be at least 41 bytes + * (40 data + 1 zero) bytes long. + * @param chksum pointer to buffer containing a checksum of the response, + * it should be at least 9 (8 data + 1 zero) bytes long. + * @param challenge pointer to the RealChallenge1 value provided by the + * server. + */ +void ff_rdt_calc_response_and_checksum(char response[41], char chksum[9], + const char *challenge); + +#endif /* AVFORMAT_RDT_H */ diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c index 33aa894428..389b1c5d4f 100644 --- a/libavformat/rtsp.c +++ b/libavformat/rtsp.c @@ -32,6 +32,7 @@ #include "rtsp.h" #include "rtp_internal.h" +#include "rdt.h" //#define DEBUG //#define DEBUG_RTP_TCP @@ -870,7 +871,8 @@ static void rtsp_close_streams(RTSPState *rt) * @returns 0 on success, <0 on error, 1 if protocol is unavailable. */ static int -make_setup_request (AVFormatContext *s, const char *host, int port, int protocol) +make_setup_request (AVFormatContext *s, const char *host, int port, + int protocol, const char *real_challenge) { RTSPState *rt = s->priv_data; int j, i, err; @@ -878,6 +880,12 @@ make_setup_request (AVFormatContext *s, const char *host, int port, int protocol AVStream *st; RTSPHeader reply1, *reply = &reply1; char cmd[2048]; + const char *trans_pref; + + if (rt->server_type == RTSP_SERVER_RDT) + trans_pref = "x-pn-tng"; + else + trans_pref = "RTP/AVP"; /* for each stream, make the setup request */ /* XXX: we assume the same server is used for the control of each @@ -918,8 +926,10 @@ make_setup_request (AVFormatContext *s, const char *host, int port, int protocol if (transport[0] != '\0') av_strlcat(transport, ",", sizeof(transport)); snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1, - "RTP/AVP/UDP;unicast;client_port=%d-%d", - port, port + 1); + "%s/UDP;unicast;client_port=%d", + trans_pref, port); + if (rt->server_type == RTSP_SERVER_RTP) + av_strlcatf(transport, sizeof(transport), "-%d", port + 1); } /* RTP/TCP */ @@ -927,7 +937,7 @@ make_setup_request (AVFormatContext *s, const char *host, int port, int protocol if (transport[0] != '\0') av_strlcat(transport, ",", sizeof(transport)); snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1, - "RTP/AVP/TCP"); + "%s/TCP", trans_pref); } else if (protocol == RTSP_PROTOCOL_RTP_UDP_MULTICAST) { @@ -935,12 +945,23 @@ make_setup_request (AVFormatContext *s, const char *host, int port, int protocol av_strlcat(transport, ",", sizeof(transport)); snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1, - "RTP/AVP/UDP;multicast"); + "%s/UDP;multicast", trans_pref); } + if (rt->server_type == RTSP_SERVER_RDT) + av_strlcat(transport, ";mode=play", sizeof(transport)); snprintf(cmd, sizeof(cmd), "SETUP %s RTSP/1.0\r\n" "Transport: %s\r\n", rtsp_st->control_url, transport); + if (i == 0 && rt->server_type == RTSP_SERVER_RDT) { + char real_res[41], real_csum[9]; + ff_rdt_calc_response_and_checksum(real_res, real_csum, + real_challenge); + av_strlcatf(cmd, sizeof(cmd), + "If-Match: %s\r\n" + "RealChallenge2: %s, sd=%s\r\n", + rt->session_id, real_res, real_csum); + } rtsp_send_cmd(s, cmd, reply, NULL); if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) { err = 1; @@ -1155,7 +1176,9 @@ static int rtsp_read_header(AVFormatContext *s, do { int protocol = ff_log2_tab[protocol_mask & ~(protocol_mask - 1)]; - err = make_setup_request(s, host, port, protocol); + err = make_setup_request(s, host, port, protocol, + rt->server_type == RTSP_SERVER_RDT ? + real_challenge : NULL); if (err < 0) goto fail; protocol_mask &= ~(1 << protocol);