1 | /***************************************************************************
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2 | * _ _ ____ _
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3 | * Project ___| | | | _ \| |
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4 | * / __| | | | |_) | |
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5 | * | (__| |_| | _ <| |___
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6 | * \___|\___/|_| \_\_____|
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7 | *
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8 | * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 | *
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10 | * This software is licensed as described in the file COPYING, which
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11 | * you should have received as part of this distribution. The terms
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12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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13 | *
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14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 | * copies of the Software, and permit persons to whom the Software is
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16 | * furnished to do so, under the terms of the COPYING file.
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17 | *
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18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 | * KIND, either express or implied.
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20 | *
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21 | ***************************************************************************/
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22 |
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23 | #include "curl_setup.h"
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24 |
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25 | #ifndef CURL_DISABLE_RTSP
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26 |
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27 | #include "urldata.h"
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28 | #include <curl/curl.h>
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29 | #include "transfer.h"
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30 | #include "sendf.h"
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31 | #include "multiif.h"
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32 | #include "http.h"
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33 | #include "url.h"
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34 | #include "progress.h"
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35 | #include "rtsp.h"
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36 | #include "rawstr.h"
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37 | #include "select.h"
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38 | #include "connect.h"
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39 | #include "curl_printf.h"
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40 |
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41 | /* The last #include files should be: */
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42 | #include "curl_memory.h"
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43 | #include "memdebug.h"
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44 |
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45 | /*
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46 | * TODO (general)
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47 | * -incoming server requests
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48 | * -server CSeq counter
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49 | * -digest authentication
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50 | * -connect thru proxy
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51 | * -pipelining?
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52 | */
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53 |
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54 |
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55 | #define RTP_PKT_CHANNEL(p) ((int)((unsigned char)((p)[1])))
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56 |
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57 | #define RTP_PKT_LENGTH(p) ((((int)((unsigned char)((p)[2]))) << 8) | \
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58 | ((int)((unsigned char)((p)[3]))))
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59 |
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60 | /* protocol-specific functions set up to be called by the main engine */
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61 | static CURLcode rtsp_do(struct connectdata *conn, bool *done);
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62 | static CURLcode rtsp_done(struct connectdata *conn, CURLcode, bool premature);
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63 | static CURLcode rtsp_connect(struct connectdata *conn, bool *done);
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64 | static CURLcode rtsp_disconnect(struct connectdata *conn, bool dead);
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65 |
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66 | static int rtsp_getsock_do(struct connectdata *conn,
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67 | curl_socket_t *socks,
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68 | int numsocks);
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69 |
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70 | /*
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71 | * Parse and write out any available RTP data.
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72 | *
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73 | * nread: amount of data left after k->str. will be modified if RTP
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74 | * data is parsed and k->str is moved up
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75 | * readmore: whether or not the RTP parser needs more data right away
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76 | */
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77 | static CURLcode rtsp_rtp_readwrite(struct SessionHandle *data,
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78 | struct connectdata *conn,
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79 | ssize_t *nread,
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80 | bool *readmore);
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81 |
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82 | static CURLcode rtsp_setup_connection(struct connectdata *conn);
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83 |
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84 |
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85 | /* this returns the socket to wait for in the DO and DOING state for the multi
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86 | interface and then we're always _sending_ a request and thus we wait for
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87 | the single socket to become writable only */
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88 | static int rtsp_getsock_do(struct connectdata *conn,
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89 | curl_socket_t *socks,
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90 | int numsocks)
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91 | {
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92 | /* write mode */
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93 | (void)numsocks; /* unused, we trust it to be at least 1 */
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94 | socks[0] = conn->sock[FIRSTSOCKET];
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95 | return GETSOCK_WRITESOCK(0);
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96 | }
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97 |
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98 | static
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99 | CURLcode rtp_client_write(struct connectdata *conn, char *ptr, size_t len);
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100 |
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101 |
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102 | /*
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103 | * RTSP handler interface.
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104 | */
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105 | const struct Curl_handler Curl_handler_rtsp = {
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106 | "RTSP", /* scheme */
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107 | rtsp_setup_connection, /* setup_connection */
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108 | rtsp_do, /* do_it */
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109 | rtsp_done, /* done */
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110 | ZERO_NULL, /* do_more */
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111 | rtsp_connect, /* connect_it */
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112 | ZERO_NULL, /* connecting */
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113 | ZERO_NULL, /* doing */
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114 | ZERO_NULL, /* proto_getsock */
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115 | rtsp_getsock_do, /* doing_getsock */
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116 | ZERO_NULL, /* domore_getsock */
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117 | ZERO_NULL, /* perform_getsock */
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118 | rtsp_disconnect, /* disconnect */
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119 | rtsp_rtp_readwrite, /* readwrite */
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120 | PORT_RTSP, /* defport */
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121 | CURLPROTO_RTSP, /* protocol */
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122 | PROTOPT_NONE /* flags */
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123 | };
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124 |
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125 |
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126 | static CURLcode rtsp_setup_connection(struct connectdata *conn)
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127 | {
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128 | struct RTSP *rtsp;
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129 |
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130 | conn->data->req.protop = rtsp = calloc(1, sizeof(struct RTSP));
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131 | if(!rtsp)
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132 | return CURLE_OUT_OF_MEMORY;
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133 |
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134 | return CURLE_OK;
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135 | }
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136 |
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137 |
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138 | /*
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139 | * The server may send us RTP data at any point, and RTSPREQ_RECEIVE does not
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140 | * want to block the application forever while receiving a stream. Therefore,
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141 | * we cannot assume that an RTSP socket is dead just because it is readable.
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142 | *
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143 | * Instead, if it is readable, run Curl_getconnectinfo() to peek at the socket
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144 | * and distinguish between closed and data.
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145 | */
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146 | bool Curl_rtsp_connisdead(struct connectdata *check)
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147 | {
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148 | int sval;
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149 | bool ret_val = TRUE;
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150 |
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151 | sval = Curl_socket_ready(check->sock[FIRSTSOCKET], CURL_SOCKET_BAD, 0);
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152 | if(sval == 0) {
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153 | /* timeout */
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154 | ret_val = FALSE;
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155 | }
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156 | else if(sval & CURL_CSELECT_ERR) {
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157 | /* socket is in an error state */
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158 | ret_val = TRUE;
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159 | }
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160 | else if((sval & CURL_CSELECT_IN) && check->data) {
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161 | /* readable with no error. could be closed or could be alive but we can
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162 | only check if we have a proper SessionHandle for the connection */
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163 | curl_socket_t connectinfo = Curl_getconnectinfo(check->data, &check);
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164 | if(connectinfo != CURL_SOCKET_BAD)
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165 | ret_val = FALSE;
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166 | }
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167 |
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168 | return ret_val;
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169 | }
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170 |
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171 | static CURLcode rtsp_connect(struct connectdata *conn, bool *done)
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172 | {
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173 | CURLcode httpStatus;
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174 | struct SessionHandle *data = conn->data;
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175 |
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176 | httpStatus = Curl_http_connect(conn, done);
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177 |
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178 | /* Initialize the CSeq if not already done */
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179 | if(data->state.rtsp_next_client_CSeq == 0)
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180 | data->state.rtsp_next_client_CSeq = 1;
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181 | if(data->state.rtsp_next_server_CSeq == 0)
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182 | data->state.rtsp_next_server_CSeq = 1;
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183 |
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184 | conn->proto.rtspc.rtp_channel = -1;
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185 |
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186 | return httpStatus;
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187 | }
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188 |
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189 | static CURLcode rtsp_disconnect(struct connectdata *conn, bool dead)
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190 | {
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191 | (void) dead;
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192 | Curl_safefree(conn->proto.rtspc.rtp_buf);
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193 | return CURLE_OK;
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194 | }
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195 |
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196 |
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197 | static CURLcode rtsp_done(struct connectdata *conn,
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198 | CURLcode status, bool premature)
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199 | {
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200 | struct SessionHandle *data = conn->data;
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201 | struct RTSP *rtsp = data->req.protop;
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202 | CURLcode httpStatus;
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203 | long CSeq_sent;
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204 | long CSeq_recv;
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205 |
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206 | /* Bypass HTTP empty-reply checks on receive */
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207 | if(data->set.rtspreq == RTSPREQ_RECEIVE)
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208 | premature = TRUE;
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209 |
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210 | httpStatus = Curl_http_done(conn, status, premature);
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211 |
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212 | if(rtsp) {
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213 | /* Check the sequence numbers */
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214 | CSeq_sent = rtsp->CSeq_sent;
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215 | CSeq_recv = rtsp->CSeq_recv;
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216 | if((data->set.rtspreq != RTSPREQ_RECEIVE) && (CSeq_sent != CSeq_recv)) {
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217 | failf(data,
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218 | "The CSeq of this request %ld did not match the response %ld",
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219 | CSeq_sent, CSeq_recv);
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220 | return CURLE_RTSP_CSEQ_ERROR;
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221 | }
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222 | else if(data->set.rtspreq == RTSPREQ_RECEIVE &&
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223 | (conn->proto.rtspc.rtp_channel == -1)) {
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224 | infof(data, "Got an RTP Receive with a CSeq of %ld\n", CSeq_recv);
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225 | /* TODO CPC: Server -> Client logic here */
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226 | }
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227 | }
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228 |
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229 | return httpStatus;
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230 | }
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231 |
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232 | static CURLcode rtsp_do(struct connectdata *conn, bool *done)
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233 | {
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234 | struct SessionHandle *data = conn->data;
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235 | CURLcode result=CURLE_OK;
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236 | Curl_RtspReq rtspreq = data->set.rtspreq;
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237 | struct RTSP *rtsp = data->req.protop;
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238 | struct HTTP *http;
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239 | Curl_send_buffer *req_buffer;
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240 | curl_off_t postsize = 0; /* for ANNOUNCE and SET_PARAMETER */
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241 | curl_off_t putsize = 0; /* for ANNOUNCE and SET_PARAMETER */
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242 |
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243 | const char *p_request = NULL;
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244 | const char *p_session_id = NULL;
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245 | const char *p_accept = NULL;
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246 | const char *p_accept_encoding = NULL;
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247 | const char *p_range = NULL;
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248 | const char *p_referrer = NULL;
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249 | const char *p_stream_uri = NULL;
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250 | const char *p_transport = NULL;
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251 | const char *p_uagent = NULL;
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252 | const char *p_proxyuserpwd = NULL;
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253 | const char *p_userpwd = NULL;
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254 |
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255 | *done = TRUE;
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256 |
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257 | http = &(rtsp->http_wrapper);
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258 | /* Assert that no one has changed the RTSP struct in an evil way */
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259 | DEBUGASSERT((void *)http == (void *)rtsp);
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260 |
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261 | rtsp->CSeq_sent = data->state.rtsp_next_client_CSeq;
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262 | rtsp->CSeq_recv = 0;
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263 |
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264 | /* Setup the 'p_request' pointer to the proper p_request string
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265 | * Since all RTSP requests are included here, there is no need to
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266 | * support custom requests like HTTP.
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267 | **/
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268 | data->set.opt_no_body = TRUE; /* most requests don't contain a body */
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269 | switch(rtspreq) {
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270 | default:
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271 | failf(data, "Got invalid RTSP request");
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272 | return CURLE_BAD_FUNCTION_ARGUMENT;
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273 | case RTSPREQ_OPTIONS:
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274 | p_request = "OPTIONS";
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275 | break;
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276 | case RTSPREQ_DESCRIBE:
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277 | p_request = "DESCRIBE";
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278 | data->set.opt_no_body = FALSE;
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279 | break;
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280 | case RTSPREQ_ANNOUNCE:
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281 | p_request = "ANNOUNCE";
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282 | break;
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283 | case RTSPREQ_SETUP:
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284 | p_request = "SETUP";
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285 | break;
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286 | case RTSPREQ_PLAY:
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287 | p_request = "PLAY";
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288 | break;
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289 | case RTSPREQ_PAUSE:
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290 | p_request = "PAUSE";
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291 | break;
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292 | case RTSPREQ_TEARDOWN:
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293 | p_request = "TEARDOWN";
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294 | break;
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295 | case RTSPREQ_GET_PARAMETER:
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296 | /* GET_PARAMETER's no_body status is determined later */
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297 | p_request = "GET_PARAMETER";
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298 | data->set.opt_no_body = FALSE;
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299 | break;
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300 | case RTSPREQ_SET_PARAMETER:
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301 | p_request = "SET_PARAMETER";
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302 | break;
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303 | case RTSPREQ_RECORD:
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304 | p_request = "RECORD";
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305 | break;
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306 | case RTSPREQ_RECEIVE:
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307 | p_request = "";
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308 | /* Treat interleaved RTP as body*/
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309 | data->set.opt_no_body = FALSE;
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310 | break;
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311 | case RTSPREQ_LAST:
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312 | failf(data, "Got invalid RTSP request: RTSPREQ_LAST");
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313 | return CURLE_BAD_FUNCTION_ARGUMENT;
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314 | }
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315 |
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316 | if(rtspreq == RTSPREQ_RECEIVE) {
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317 | Curl_setup_transfer(conn, FIRSTSOCKET, -1, TRUE,
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318 | &http->readbytecount, -1, NULL);
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319 |
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320 | return result;
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321 | }
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322 |
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323 | p_session_id = data->set.str[STRING_RTSP_SESSION_ID];
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324 | if(!p_session_id &&
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325 | (rtspreq & ~(RTSPREQ_OPTIONS | RTSPREQ_DESCRIBE | RTSPREQ_SETUP))) {
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326 | failf(data, "Refusing to issue an RTSP request [%s] without a session ID.",
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327 | p_request);
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328 | return CURLE_BAD_FUNCTION_ARGUMENT;
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329 | }
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330 |
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331 | /* TODO: proxy? */
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332 |
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333 | /* Stream URI. Default to server '*' if not specified */
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334 | if(data->set.str[STRING_RTSP_STREAM_URI]) {
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335 | p_stream_uri = data->set.str[STRING_RTSP_STREAM_URI];
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336 | }
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337 | else {
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338 | p_stream_uri = "*";
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339 | }
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340 |
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341 | /* Transport Header for SETUP requests */
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342 | p_transport = Curl_checkheaders(conn, "Transport:");
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343 | if(rtspreq == RTSPREQ_SETUP && !p_transport) {
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344 | /* New Transport: setting? */
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345 | if(data->set.str[STRING_RTSP_TRANSPORT]) {
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346 | Curl_safefree(conn->allocptr.rtsp_transport);
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347 |
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348 | conn->allocptr.rtsp_transport =
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349 | aprintf("Transport: %s\r\n",
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350 | data->set.str[STRING_RTSP_TRANSPORT]);
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351 | if(!conn->allocptr.rtsp_transport)
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352 | return CURLE_OUT_OF_MEMORY;
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353 | }
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354 | else {
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355 | failf(data,
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356 | "Refusing to issue an RTSP SETUP without a Transport: header.");
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357 | return CURLE_BAD_FUNCTION_ARGUMENT;
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358 | }
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359 |
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360 | p_transport = conn->allocptr.rtsp_transport;
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361 | }
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362 |
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363 | /* Accept Headers for DESCRIBE requests */
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364 | if(rtspreq == RTSPREQ_DESCRIBE) {
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365 | /* Accept Header */
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366 | p_accept = Curl_checkheaders(conn, "Accept:")?
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367 | NULL:"Accept: application/sdp\r\n";
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368 |
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369 | /* Accept-Encoding header */
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370 | if(!Curl_checkheaders(conn, "Accept-Encoding:") &&
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371 | data->set.str[STRING_ENCODING]) {
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372 | Curl_safefree(conn->allocptr.accept_encoding);
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373 | conn->allocptr.accept_encoding =
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374 | aprintf("Accept-Encoding: %s\r\n", data->set.str[STRING_ENCODING]);
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375 |
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376 | if(!conn->allocptr.accept_encoding)
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377 | return CURLE_OUT_OF_MEMORY;
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378 |
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379 | p_accept_encoding = conn->allocptr.accept_encoding;
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380 | }
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381 | }
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382 |
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383 | /* The User-Agent string might have been allocated in url.c already, because
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384 | it might have been used in the proxy connect, but if we have got a header
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385 | with the user-agent string specified, we erase the previously made string
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386 | here. */
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387 | if(Curl_checkheaders(conn, "User-Agent:") && conn->allocptr.uagent) {
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388 | Curl_safefree(conn->allocptr.uagent);
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389 | conn->allocptr.uagent = NULL;
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390 | }
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391 | else if(!Curl_checkheaders(conn, "User-Agent:") &&
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392 | data->set.str[STRING_USERAGENT]) {
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393 | p_uagent = conn->allocptr.uagent;
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394 | }
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395 |
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396 | /* setup the authentication headers */
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397 | result = Curl_http_output_auth(conn, p_request, p_stream_uri, FALSE);
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398 | if(result)
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399 | return result;
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400 |
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401 | p_proxyuserpwd = conn->allocptr.proxyuserpwd;
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402 | p_userpwd = conn->allocptr.userpwd;
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403 |
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404 | /* Referrer */
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405 | Curl_safefree(conn->allocptr.ref);
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406 | if(data->change.referer && !Curl_checkheaders(conn, "Referer:"))
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407 | conn->allocptr.ref = aprintf("Referer: %s\r\n", data->change.referer);
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408 | else
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409 | conn->allocptr.ref = NULL;
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410 |
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411 | p_referrer = conn->allocptr.ref;
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412 |
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413 | /*
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414 | * Range Header
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415 | * Only applies to PLAY, PAUSE, RECORD
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416 | *
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417 | * Go ahead and use the Range stuff supplied for HTTP
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418 | */
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419 | if(data->state.use_range &&
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420 | (rtspreq & (RTSPREQ_PLAY | RTSPREQ_PAUSE | RTSPREQ_RECORD))) {
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421 |
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422 | /* Check to see if there is a range set in the custom headers */
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423 | if(!Curl_checkheaders(conn, "Range:") && data->state.range) {
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424 | Curl_safefree(conn->allocptr.rangeline);
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425 | conn->allocptr.rangeline = aprintf("Range: %s\r\n", data->state.range);
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426 | p_range = conn->allocptr.rangeline;
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427 | }
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428 | }
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429 |
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430 | /*
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431 | * Sanity check the custom headers
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432 | */
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433 | if(Curl_checkheaders(conn, "CSeq:")) {
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434 | failf(data, "CSeq cannot be set as a custom header.");
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435 | return CURLE_RTSP_CSEQ_ERROR;
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436 | }
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437 | if(Curl_checkheaders(conn, "Session:")) {
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438 | failf(data, "Session ID cannot be set as a custom header.");
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439 | return CURLE_BAD_FUNCTION_ARGUMENT;
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440 | }
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441 |
|
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442 | /* Initialize a dynamic send buffer */
|
---|
443 | req_buffer = Curl_add_buffer_init();
|
---|
444 |
|
---|
445 | if(!req_buffer)
|
---|
446 | return CURLE_OUT_OF_MEMORY;
|
---|
447 |
|
---|
448 | result =
|
---|
449 | Curl_add_bufferf(req_buffer,
|
---|
450 | "%s %s RTSP/1.0\r\n" /* Request Stream-URI RTSP/1.0 */
|
---|
451 | "CSeq: %ld\r\n", /* CSeq */
|
---|
452 | p_request, p_stream_uri, rtsp->CSeq_sent);
|
---|
453 | if(result)
|
---|
454 | return result;
|
---|
455 |
|
---|
456 | /*
|
---|
457 | * Rather than do a normal alloc line, keep the session_id unformatted
|
---|
458 | * to make comparison easier
|
---|
459 | */
|
---|
460 | if(p_session_id) {
|
---|
461 | result = Curl_add_bufferf(req_buffer, "Session: %s\r\n", p_session_id);
|
---|
462 | if(result)
|
---|
463 | return result;
|
---|
464 | }
|
---|
465 |
|
---|
466 | /*
|
---|
467 | * Shared HTTP-like options
|
---|
468 | */
|
---|
469 | result = Curl_add_bufferf(req_buffer,
|
---|
470 | "%s" /* transport */
|
---|
471 | "%s" /* accept */
|
---|
472 | "%s" /* accept-encoding */
|
---|
473 | "%s" /* range */
|
---|
474 | "%s" /* referrer */
|
---|
475 | "%s" /* user-agent */
|
---|
476 | "%s" /* proxyuserpwd */
|
---|
477 | "%s" /* userpwd */
|
---|
478 | ,
|
---|
479 | p_transport ? p_transport : "",
|
---|
480 | p_accept ? p_accept : "",
|
---|
481 | p_accept_encoding ? p_accept_encoding : "",
|
---|
482 | p_range ? p_range : "",
|
---|
483 | p_referrer ? p_referrer : "",
|
---|
484 | p_uagent ? p_uagent : "",
|
---|
485 | p_proxyuserpwd ? p_proxyuserpwd : "",
|
---|
486 | p_userpwd ? p_userpwd : "");
|
---|
487 |
|
---|
488 | /*
|
---|
489 | * Free userpwd now --- cannot reuse this for Negotiate and possibly NTLM
|
---|
490 | * with basic and digest, it will be freed anyway by the next request
|
---|
491 | */
|
---|
492 | Curl_safefree (conn->allocptr.userpwd);
|
---|
493 | conn->allocptr.userpwd = NULL;
|
---|
494 |
|
---|
495 | if(result)
|
---|
496 | return result;
|
---|
497 |
|
---|
498 | if((rtspreq == RTSPREQ_SETUP) || (rtspreq == RTSPREQ_DESCRIBE)) {
|
---|
499 | result = Curl_add_timecondition(data, req_buffer);
|
---|
500 | if(result)
|
---|
501 | return result;
|
---|
502 | }
|
---|
503 |
|
---|
504 | result = Curl_add_custom_headers(conn, FALSE, req_buffer);
|
---|
505 | if(result)
|
---|
506 | return result;
|
---|
507 |
|
---|
508 | if(rtspreq == RTSPREQ_ANNOUNCE ||
|
---|
509 | rtspreq == RTSPREQ_SET_PARAMETER ||
|
---|
510 | rtspreq == RTSPREQ_GET_PARAMETER) {
|
---|
511 |
|
---|
512 | if(data->set.upload) {
|
---|
513 | putsize = data->state.infilesize;
|
---|
514 | data->set.httpreq = HTTPREQ_PUT;
|
---|
515 |
|
---|
516 | }
|
---|
517 | else {
|
---|
518 | postsize = (data->state.infilesize != -1)?
|
---|
519 | data->state.infilesize:
|
---|
520 | (data->set.postfields? (curl_off_t)strlen(data->set.postfields):0);
|
---|
521 | data->set.httpreq = HTTPREQ_POST;
|
---|
522 | }
|
---|
523 |
|
---|
524 | if(putsize > 0 || postsize > 0) {
|
---|
525 | /* As stated in the http comments, it is probably not wise to
|
---|
526 | * actually set a custom Content-Length in the headers */
|
---|
527 | if(!Curl_checkheaders(conn, "Content-Length:")) {
|
---|
528 | result = Curl_add_bufferf(req_buffer,
|
---|
529 | "Content-Length: %" CURL_FORMAT_CURL_OFF_T"\r\n",
|
---|
530 | (data->set.upload ? putsize : postsize));
|
---|
531 | if(result)
|
---|
532 | return result;
|
---|
533 | }
|
---|
534 |
|
---|
535 | if(rtspreq == RTSPREQ_SET_PARAMETER ||
|
---|
536 | rtspreq == RTSPREQ_GET_PARAMETER) {
|
---|
537 | if(!Curl_checkheaders(conn, "Content-Type:")) {
|
---|
538 | result = Curl_add_bufferf(req_buffer,
|
---|
539 | "Content-Type: text/parameters\r\n");
|
---|
540 | if(result)
|
---|
541 | return result;
|
---|
542 | }
|
---|
543 | }
|
---|
544 |
|
---|
545 | if(rtspreq == RTSPREQ_ANNOUNCE) {
|
---|
546 | if(!Curl_checkheaders(conn, "Content-Type:")) {
|
---|
547 | result = Curl_add_bufferf(req_buffer,
|
---|
548 | "Content-Type: application/sdp\r\n");
|
---|
549 | if(result)
|
---|
550 | return result;
|
---|
551 | }
|
---|
552 | }
|
---|
553 |
|
---|
554 | data->state.expect100header = FALSE; /* RTSP posts are simple/small */
|
---|
555 | }
|
---|
556 | else if(rtspreq == RTSPREQ_GET_PARAMETER) {
|
---|
557 | /* Check for an empty GET_PARAMETER (heartbeat) request */
|
---|
558 | data->set.httpreq = HTTPREQ_HEAD;
|
---|
559 | data->set.opt_no_body = TRUE;
|
---|
560 | }
|
---|
561 | }
|
---|
562 |
|
---|
563 | /* RTSP never allows chunked transfer */
|
---|
564 | data->req.forbidchunk = TRUE;
|
---|
565 | /* Finish the request buffer */
|
---|
566 | result = Curl_add_buffer(req_buffer, "\r\n", 2);
|
---|
567 | if(result)
|
---|
568 | return result;
|
---|
569 |
|
---|
570 | if(postsize > 0) {
|
---|
571 | result = Curl_add_buffer(req_buffer, data->set.postfields,
|
---|
572 | (size_t)postsize);
|
---|
573 | if(result)
|
---|
574 | return result;
|
---|
575 | }
|
---|
576 |
|
---|
577 | /* issue the request */
|
---|
578 | result = Curl_add_buffer_send(req_buffer, conn,
|
---|
579 | &data->info.request_size, 0, FIRSTSOCKET);
|
---|
580 | if(result) {
|
---|
581 | failf(data, "Failed sending RTSP request");
|
---|
582 | return result;
|
---|
583 | }
|
---|
584 |
|
---|
585 | Curl_setup_transfer(conn, FIRSTSOCKET, -1, TRUE, &http->readbytecount,
|
---|
586 | putsize?FIRSTSOCKET:-1,
|
---|
587 | putsize?&http->writebytecount:NULL);
|
---|
588 |
|
---|
589 | /* Increment the CSeq on success */
|
---|
590 | data->state.rtsp_next_client_CSeq++;
|
---|
591 |
|
---|
592 | if(http->writebytecount) {
|
---|
593 | /* if a request-body has been sent off, we make sure this progress is
|
---|
594 | noted properly */
|
---|
595 | Curl_pgrsSetUploadCounter(data, http->writebytecount);
|
---|
596 | if(Curl_pgrsUpdate(conn))
|
---|
597 | result = CURLE_ABORTED_BY_CALLBACK;
|
---|
598 | }
|
---|
599 |
|
---|
600 | return result;
|
---|
601 | }
|
---|
602 |
|
---|
603 |
|
---|
604 | static CURLcode rtsp_rtp_readwrite(struct SessionHandle *data,
|
---|
605 | struct connectdata *conn,
|
---|
606 | ssize_t *nread,
|
---|
607 | bool *readmore) {
|
---|
608 | struct SingleRequest *k = &data->req;
|
---|
609 | struct rtsp_conn *rtspc = &(conn->proto.rtspc);
|
---|
610 |
|
---|
611 | char *rtp; /* moving pointer to rtp data */
|
---|
612 | ssize_t rtp_dataleft; /* how much data left to parse in this round */
|
---|
613 | char *scratch;
|
---|
614 | CURLcode result;
|
---|
615 |
|
---|
616 | if(rtspc->rtp_buf) {
|
---|
617 | /* There was some leftover data the last time. Merge buffers */
|
---|
618 | char *newptr = realloc(rtspc->rtp_buf, rtspc->rtp_bufsize + *nread);
|
---|
619 | if(!newptr) {
|
---|
620 | Curl_safefree(rtspc->rtp_buf);
|
---|
621 | rtspc->rtp_buf = NULL;
|
---|
622 | rtspc->rtp_bufsize = 0;
|
---|
623 | return CURLE_OUT_OF_MEMORY;
|
---|
624 | }
|
---|
625 | rtspc->rtp_buf = newptr;
|
---|
626 | memcpy(rtspc->rtp_buf + rtspc->rtp_bufsize, k->str, *nread);
|
---|
627 | rtspc->rtp_bufsize += *nread;
|
---|
628 | rtp = rtspc->rtp_buf;
|
---|
629 | rtp_dataleft = rtspc->rtp_bufsize;
|
---|
630 | }
|
---|
631 | else {
|
---|
632 | /* Just parse the request buffer directly */
|
---|
633 | rtp = k->str;
|
---|
634 | rtp_dataleft = *nread;
|
---|
635 | }
|
---|
636 |
|
---|
637 | while((rtp_dataleft > 0) &&
|
---|
638 | (rtp[0] == '$')) {
|
---|
639 | if(rtp_dataleft > 4) {
|
---|
640 | int rtp_length;
|
---|
641 |
|
---|
642 | /* Parse the header */
|
---|
643 | /* The channel identifier immediately follows and is 1 byte */
|
---|
644 | rtspc->rtp_channel = RTP_PKT_CHANNEL(rtp);
|
---|
645 |
|
---|
646 | /* The length is two bytes */
|
---|
647 | rtp_length = RTP_PKT_LENGTH(rtp);
|
---|
648 |
|
---|
649 | if(rtp_dataleft < rtp_length + 4) {
|
---|
650 | /* Need more - incomplete payload*/
|
---|
651 | *readmore = TRUE;
|
---|
652 | break;
|
---|
653 | }
|
---|
654 | else {
|
---|
655 | /* We have the full RTP interleaved packet
|
---|
656 | * Write out the header including the leading '$' */
|
---|
657 | DEBUGF(infof(data, "RTP write channel %d rtp_length %d\n",
|
---|
658 | rtspc->rtp_channel, rtp_length));
|
---|
659 | result = rtp_client_write(conn, &rtp[0], rtp_length + 4);
|
---|
660 | if(result) {
|
---|
661 | failf(data, "Got an error writing an RTP packet");
|
---|
662 | *readmore = FALSE;
|
---|
663 | Curl_safefree(rtspc->rtp_buf);
|
---|
664 | rtspc->rtp_buf = NULL;
|
---|
665 | rtspc->rtp_bufsize = 0;
|
---|
666 | return result;
|
---|
667 | }
|
---|
668 |
|
---|
669 | /* Move forward in the buffer */
|
---|
670 | rtp_dataleft -= rtp_length + 4;
|
---|
671 | rtp += rtp_length + 4;
|
---|
672 |
|
---|
673 | if(data->set.rtspreq == RTSPREQ_RECEIVE) {
|
---|
674 | /* If we are in a passive receive, give control back
|
---|
675 | * to the app as often as we can.
|
---|
676 | */
|
---|
677 | k->keepon &= ~KEEP_RECV;
|
---|
678 | }
|
---|
679 | }
|
---|
680 | }
|
---|
681 | else {
|
---|
682 | /* Need more - incomplete header */
|
---|
683 | *readmore = TRUE;
|
---|
684 | break;
|
---|
685 | }
|
---|
686 | }
|
---|
687 |
|
---|
688 | if(rtp_dataleft != 0 && rtp[0] == '$') {
|
---|
689 | DEBUGF(infof(data, "RTP Rewinding %zd %s\n", rtp_dataleft,
|
---|
690 | *readmore ? "(READMORE)" : ""));
|
---|
691 |
|
---|
692 | /* Store the incomplete RTP packet for a "rewind" */
|
---|
693 | scratch = malloc(rtp_dataleft);
|
---|
694 | if(!scratch) {
|
---|
695 | Curl_safefree(rtspc->rtp_buf);
|
---|
696 | rtspc->rtp_buf = NULL;
|
---|
697 | rtspc->rtp_bufsize = 0;
|
---|
698 | return CURLE_OUT_OF_MEMORY;
|
---|
699 | }
|
---|
700 | memcpy(scratch, rtp, rtp_dataleft);
|
---|
701 | Curl_safefree(rtspc->rtp_buf);
|
---|
702 | rtspc->rtp_buf = scratch;
|
---|
703 | rtspc->rtp_bufsize = rtp_dataleft;
|
---|
704 |
|
---|
705 | /* As far as the transfer is concerned, this data is consumed */
|
---|
706 | *nread = 0;
|
---|
707 | return CURLE_OK;
|
---|
708 | }
|
---|
709 | else {
|
---|
710 | /* Fix up k->str to point just after the last RTP packet */
|
---|
711 | k->str += *nread - rtp_dataleft;
|
---|
712 |
|
---|
713 | /* either all of the data has been read or...
|
---|
714 | * rtp now points at the next byte to parse
|
---|
715 | */
|
---|
716 | if(rtp_dataleft > 0)
|
---|
717 | DEBUGASSERT(k->str[0] == rtp[0]);
|
---|
718 |
|
---|
719 | DEBUGASSERT(rtp_dataleft <= *nread); /* sanity check */
|
---|
720 |
|
---|
721 | *nread = rtp_dataleft;
|
---|
722 | }
|
---|
723 |
|
---|
724 | /* If we get here, we have finished with the leftover/merge buffer */
|
---|
725 | Curl_safefree(rtspc->rtp_buf);
|
---|
726 | rtspc->rtp_buf = NULL;
|
---|
727 | rtspc->rtp_bufsize = 0;
|
---|
728 |
|
---|
729 | return CURLE_OK;
|
---|
730 | }
|
---|
731 |
|
---|
732 | static
|
---|
733 | CURLcode rtp_client_write(struct connectdata *conn, char *ptr, size_t len)
|
---|
734 | {
|
---|
735 | struct SessionHandle *data = conn->data;
|
---|
736 | size_t wrote;
|
---|
737 | curl_write_callback writeit;
|
---|
738 |
|
---|
739 | if(len == 0) {
|
---|
740 | failf (data, "Cannot write a 0 size RTP packet.");
|
---|
741 | return CURLE_WRITE_ERROR;
|
---|
742 | }
|
---|
743 |
|
---|
744 | writeit = data->set.fwrite_rtp?data->set.fwrite_rtp:data->set.fwrite_func;
|
---|
745 | wrote = writeit(ptr, 1, len, data->set.rtp_out);
|
---|
746 |
|
---|
747 | if(CURL_WRITEFUNC_PAUSE == wrote) {
|
---|
748 | failf (data, "Cannot pause RTP");
|
---|
749 | return CURLE_WRITE_ERROR;
|
---|
750 | }
|
---|
751 |
|
---|
752 | if(wrote != len) {
|
---|
753 | failf (data, "Failed writing RTP data");
|
---|
754 | return CURLE_WRITE_ERROR;
|
---|
755 | }
|
---|
756 |
|
---|
757 | return CURLE_OK;
|
---|
758 | }
|
---|
759 |
|
---|
760 | CURLcode Curl_rtsp_parseheader(struct connectdata *conn,
|
---|
761 | char *header)
|
---|
762 | {
|
---|
763 | struct SessionHandle *data = conn->data;
|
---|
764 | long CSeq = 0;
|
---|
765 |
|
---|
766 | if(checkprefix("CSeq:", header)) {
|
---|
767 | /* Store the received CSeq. Match is verified in rtsp_done */
|
---|
768 | int nc = sscanf(&header[4], ": %ld", &CSeq);
|
---|
769 | if(nc == 1) {
|
---|
770 | struct RTSP *rtsp = data->req.protop;
|
---|
771 | rtsp->CSeq_recv = CSeq; /* mark the request */
|
---|
772 | data->state.rtsp_CSeq_recv = CSeq; /* update the handle */
|
---|
773 | }
|
---|
774 | else {
|
---|
775 | failf(data, "Unable to read the CSeq header: [%s]", header);
|
---|
776 | return CURLE_RTSP_CSEQ_ERROR;
|
---|
777 | }
|
---|
778 | }
|
---|
779 | else if(checkprefix("Session:", header)) {
|
---|
780 | char *start;
|
---|
781 |
|
---|
782 | /* Find the first non-space letter */
|
---|
783 | start = header + 8;
|
---|
784 | while(*start && ISSPACE(*start))
|
---|
785 | start++;
|
---|
786 |
|
---|
787 | if(!*start) {
|
---|
788 | failf(data, "Got a blank Session ID");
|
---|
789 | }
|
---|
790 | else if(data->set.str[STRING_RTSP_SESSION_ID]) {
|
---|
791 | /* If the Session ID is set, then compare */
|
---|
792 | if(strncmp(start, data->set.str[STRING_RTSP_SESSION_ID],
|
---|
793 | strlen(data->set.str[STRING_RTSP_SESSION_ID])) != 0) {
|
---|
794 | failf(data, "Got RTSP Session ID Line [%s], but wanted ID [%s]",
|
---|
795 | start, data->set.str[STRING_RTSP_SESSION_ID]);
|
---|
796 | return CURLE_RTSP_SESSION_ERROR;
|
---|
797 | }
|
---|
798 | }
|
---|
799 | else {
|
---|
800 | /* If the Session ID is not set, and we find it in a response, then
|
---|
801 | set it */
|
---|
802 |
|
---|
803 | /* The session ID can be an alphanumeric or a 'safe' character
|
---|
804 | *
|
---|
805 | * RFC 2326 15.1 Base Syntax:
|
---|
806 | * safe = "\$" | "-" | "_" | "." | "+"
|
---|
807 | * */
|
---|
808 | char *end = start;
|
---|
809 | while(*end &&
|
---|
810 | (ISALNUM(*end) || *end == '-' || *end == '_' || *end == '.' ||
|
---|
811 | *end == '+' ||
|
---|
812 | (*end == '\\' && *(end + 1) && *(end + 1) == '$' && (++end, 1))))
|
---|
813 | end++;
|
---|
814 |
|
---|
815 | /* Copy the id substring into a new buffer */
|
---|
816 | data->set.str[STRING_RTSP_SESSION_ID] = malloc(end - start + 1);
|
---|
817 | if(data->set.str[STRING_RTSP_SESSION_ID] == NULL)
|
---|
818 | return CURLE_OUT_OF_MEMORY;
|
---|
819 | memcpy(data->set.str[STRING_RTSP_SESSION_ID], start, end - start);
|
---|
820 | (data->set.str[STRING_RTSP_SESSION_ID])[end - start] = '\0';
|
---|
821 | }
|
---|
822 | }
|
---|
823 | return CURLE_OK;
|
---|
824 | }
|
---|
825 |
|
---|
826 | #endif /* CURL_DISABLE_RTSP */
|
---|