Hi
I had a segfault in parseRTSPRequestString. To see gdb details, please go te the
end of the mail.
I looked into the code, and here is some comments :
- The following line appears to be useless, as j is set to i+1 next line :
while (j < reqStrSize && (reqStr[j] == ' ' || reqStr[j] == '\t')) ++j; // skip
over any additional white space
for (j = i+1; (int)j < (int)(reqStrSize-8); ++j) {
- My bug was because here, and I think k1 was 0 in my case
// Also look for the URL 'pre-suffix' before this:
unsigned k3 = --k1;
So why not adding a check like :
unsigned k3=0;
if( k1 > 0)
k3 = --k1;
Regards.
gdb told me this :
#0 0xb5bfdb02 in parseRTSPRequestString (
reqStr=0x844c050 " rvr l ..-i\rDt:Wd 2Nv20 62:2 M\rSsin
5764e5d6\nCnetLnt:0\nah-oto:n-ach\rCe:26\n\n", reqStrSize=167,
resultCmdName=0xb28f404c "/1.0 200OK\r\nSee:vc100gt\nae e,1 o
081:45GT\neso:a4d4ffdb\rotn-egh \rCceCnrl oce\nsq 8\r\r",
resultCmdNameMaxSize=100,
resultURLPreSuffix=0xb28f3fe8 "cam2", resultURLPreSuffixMaxSize=100,
resultURLSuffix=0xb28f3f84 "rvr l ..-i\rDt:Wd 2Nv20 62:2 M\rSsin
5764e5d6\nCnetLnt:0\nah-oto:n-ach\rCe:26\n\n", resultURLSuffixMaxSize=100,
resultCSeq=0xb28f3f20 "�\f\036\b$\005", resultCSeqMaxSize=100)
at RTSPCommon.cpp:100
(gdb) x/167c reqStr
0x844c050: 32 ' ' 114 'r' 118 'v' 114 'r' 32 ' ' 108 'l' 32 ' ' 46 '.'
0x844c058: 46 '.' 45 '-' 105 'i' 13 '\r' 68 'D' 116 't' 58 ':' 87 'W'
0x844c060: 100 'd' 32 ' ' 50 '2' 78 'N' 118 'v' 50 '2' 48 '0' 32 ' '
0x844c068: 54 '6' 50 '2' 58 ':' 50 '2' 32 ' ' 77 'M' 13 '\r' 83 'S'
0x844c070: 115 's' 105 'i' 110 'n' 32 ' ' 53 '5' 55 '7' 54 '6' 52 '4'
0x844c078: 101 'e' 53 '5' 100 'd' 54 '6' 10 '\n' 67 'C' 110 'n' 101 'e'
0x844c080: 116 't' 76 'L' 110 'n' 116 't' 58 ':' 48 '0' 10 '\n' 97 'a'
0x844c088: 104 'h' 45 '-' 111 'o' 116 't' 111 'o' 58 ':' 110 'n' 45 '-'
0x844c090: 97 'a' 99 'c' 104 'h' 13 '\r' 67 'C' 101 'e' 58 ':' 50 '2'
0x844c098: 54 '6' 10 '\n' 10 '\n' 0 '\0' 32 ' ' 56 '8' 13 '\r' 13 '\r'
0x844c0a0: 10 '\n' 82 'R' 84 'T' 83 'S' 80 'P' 47 '/' 49 '1' 46 '.'
0x844c0a8: 48 '0' 32 ' ' 50 '2' 48 '0' 48 '0' 79 'O' 75 'K' 13 '\r'
0x844c0b0: 10 '\n' 83 'S' 101 'e' 101 'e' 58 ':' 118 'v' 99 'c' 49 '1'
0x844c0b8: 48 '0' 48 '0' 103 'g' 116 't' 10 '\n' 97 'a' 101 'e' 32 ' '
0x844c0c0: 101 'e' 44 ',' 49 '1' 32 ' ' 111 'o' 32 ' ' 48 '0' 56 '8'
0x844c0c8: 49 '1' 58 ':' 52 '4' 53 '5' 71 'G' 84 'T' 10 '\n' 101 'e'
0x844c0d0: 115 's' 111 'o' 58 ':' 97 'a' 52 '4' 100 'd' 52 '4' 102 'f'
0x844c0d8: 102 'f' 100 'd' 98 'b' 13 '\r' 111 'o' 116 't' 110 'n' 45 '-'
0x844c0e0: 101 'e' 103 'g' 104 'h' 32 ' ' 13 '\r' 67 'C' 99 'c' 101 'e'
0x844c0e8: 67 'C' 110 'n' 114 'r' 108 'l' 32 ' ' 111 'o' 99 'c' 101 'e'
0x844c0f0: 10 '\n' 115 's' 113 'q' 32 ' ' 56 '8' 13 '\r' 13 '\r'
So reqStr had to be : " rvr l ..-i\rDt:Wd 2Nv20 62:2 M\rSsin
5764e5d6\nCnetLnt:0\nah-oto:n-ach\rCe:26\n\n\0 8\r\r\nRTSP/1.0
200OK\r\nSee:vc100gt\nae e,1 o 081:45GT\neso:a4d4ffdb\rotn-egh \rCceCnrl
oce\nsq 8\r\r"
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