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/**********
This library 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. (See <http://www.gnu.org/copyleft/lesser.html>.)
This library 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 this library; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**********/
// "liveMedia"
// Copyright (c) 1996-2005 Live Networks, Inc. All rights reserved.
// Common routines used by both RTSP clients and servers
// Implementation
#include "RTSPCommon.hh"
Boolean parseRTSPRequestString(char const* reqStr,
unsigned reqStrSize,
char* resultCmdName,
unsigned resultCmdNameMaxSize,
char* resultURLPreSuffix,
unsigned resultURLPreSuffixMaxSize,
char* resultURLSuffix,
unsigned resultURLSuffixMaxSize,
char* resultCSeq,
unsigned resultCSeqMaxSize) {
// This parser is currently rather dumb; it should be made smarter #####
// Read everything up to the first space as the command name:
Boolean parseSucceeded = False;
unsigned i;
for (i = 0; i < resultCmdNameMaxSize-1 && i < reqStrSize; ++i) {
char c = reqStr[i];
if (c == ' ' || c == '\t') {
parseSucceeded = True;
break;
}
resultCmdName[i] = c;
}
resultCmdName[i] = '\0';
if (!parseSucceeded) return False;
// Skip over the prefix of any "rtsp://" or "rtsp:/" URL that follows:
unsigned j = i+1;
while (j < reqStrSize && (reqStr[j] == ' ' || reqStr[j] == '\t')) ++j; // skip over any additional white space
for (j = i+1; j < reqStrSize-8; ++j) {
if ((reqStr[j] == 'r' || reqStr[j] == 'R')
&& (reqStr[j+1] == 't' || reqStr[j+1] == 'T')
&& (reqStr[j+2] == 's' || reqStr[j+2] == 'S')
&& (reqStr[j+3] == 'p' || reqStr[j+3] == 'P')
&& reqStr[j+4] == ':' && reqStr[j+5] == '/') {
j += 6;
if (reqStr[j] == '/') {
// This is a "rtsp://" URL; skip over the host:port part that follows:
++j;
while (j < reqStrSize && reqStr[j] != '/' && reqStr[j] != ' ') ++j;
} else {
// This is a "rtsp:/" URL; back up to the "/":
--j;
}
i = j;
break;
}
}
// Look for the URL suffix (before the following "RTSP/"):
parseSucceeded = False;
for (unsigned k = i+1; k < reqStrSize-5; ++k) {
if (reqStr[k] == 'R' && reqStr[k+1] == 'T' &&
reqStr[k+2] == 'S' && reqStr[k+3] == 'P' && reqStr[k+4] == '/') {
while (--k >= i && reqStr[k] == ' ') {} // go back over all spaces before "RTSP/"
unsigned k1 = k;
while (k1 > i && reqStr[k1] != '/' && reqStr[k1] != ' ') --k1;
// the URL suffix comes from [k1+1,k]
// Copy "resultURLSuffix":
if (k - k1 + 1 > resultURLSuffixMaxSize) return False; // there's no room
unsigned n = 0, k2 = k1+1;
while (k2 <= k) resultURLSuffix[n++] = reqStr[k2++];
resultURLSuffix[n] = '\0';
// Also look for the URL 'pre-suffix' before this:
unsigned k3 = --k1;
while (k3 > i && reqStr[k3] != '/' && reqStr[k3] != ' ') --k3;
// the URL pre-suffix comes from [k3+1,k1]
// Copy "resultURLPreSuffix":
if (k1 - k3 + 1 > resultURLPreSuffixMaxSize) return False; // there's no room
n = 0; k2 = k3+1;
while (k2 <= k1) resultURLPreSuffix[n++] = reqStr[k2++];
resultURLPreSuffix[n] = '\0';
i = k + 7; // to go past " RTSP/"
parseSucceeded = True;
break;
}
}
if (!parseSucceeded) return False;
// Look for "CSeq:", skip whitespace,
// then read everything up to the next \r or \n as 'CSeq':
parseSucceeded = False;
for (j = i; j < reqStrSize-5; ++j) {
if (reqStr[j] == 'C' && reqStr[j+1] == 'S' && reqStr[j+2] == 'e' &&
reqStr[j+3] == 'q' && reqStr[j+4] == ':') {
j += 5;
unsigned n;
while (j < reqStrSize && (reqStr[j] == ' ' || reqStr[j] == '\t')) ++j;
for (n = 0; n < resultCSeqMaxSize-1 && j < reqStrSize; ++n,++j) {
char c = reqStr[j];
if (c == '\r' || c == '\n') {
parseSucceeded = True;
break;
}
resultCSeq[n] = c;
}
resultCSeq[n] = '\0';
break;
}
}
if (!parseSucceeded) return False;
return True;
}
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