diff options
author | hasso <hasso> | 2004-09-10 22:48:21 +0200 |
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committer | hasso <hasso> | 2004-09-10 22:48:21 +0200 |
commit | f390d2c7839c04100e4de8246215ce10ea96b653 (patch) | |
tree | 9910d250bfb6605d44e7104ef786ba0c84ddb01a /isisd/iso_checksum.c | |
parent | Add IS-IS info into array. (diff) | |
download | frr-f390d2c7839c04100e4de8246215ce10ea96b653.tar.xz frr-f390d2c7839c04100e4de8246215ce10ea96b653.zip |
Indentation only. No any functional changes.
Diffstat (limited to 'isisd/iso_checksum.c')
-rw-r--r-- | isisd/iso_checksum.c | 72 |
1 files changed, 38 insertions, 34 deletions
diff --git a/isisd/iso_checksum.c b/isisd/iso_checksum.c index d0bb8a75d..e65f6ef67 100644 --- a/isisd/iso_checksum.c +++ b/isisd/iso_checksum.c @@ -46,8 +46,8 @@ */ int -iso_csum_verify (u_char *buffer, int len, uint16_t *csum) -{ +iso_csum_verify (u_char * buffer, int len, uint16_t * csum) +{ u_int8_t *p; u_int32_t c0; u_int32_t c1; @@ -70,28 +70,28 @@ iso_csum_verify (u_char *buffer, int len, uint16_t *csum) */ if (c0 == 0 || c1 == 0) return 1; - + /* * Otherwise initialize to zero and calculate... */ c0 = 0; c1 = 0; - for (i = 0; i < len; i++) { - c0 = c0 + *(p++); - c1 += c0; - } + for (i = 0; i < len; i++) + { + c0 = c0 + *(p++); + c1 += c0; + } c0 = c0 % 255; c1 = c1 % 255; - - if ( c0 == 0 && c1 == 0) + + if (c0 == 0 && c1 == 0) return 0; return 1; } - /* * Creates the checksum. *csum points to the position of the checksum in the * PDU. @@ -102,7 +102,7 @@ iso_csum_verify (u_char *buffer, int len, uint16_t *csum) */ #define FIXED_CODE u_int16_t -iso_csum_create (u_char *buffer, int len, u_int16_t n) +iso_csum_create (u_char * buffer, int len, u_int16_t n) { u_int8_t *p; @@ -112,7 +112,7 @@ iso_csum_create (u_char *buffer, int len, u_int16_t n) u_int32_t c0; u_int32_t c1; u_int16_t checksum; - u_int16_t *csum; + u_int16_t *csum; int i; checksum = 0; @@ -120,40 +120,46 @@ iso_csum_create (u_char *buffer, int len, u_int16_t n) /* * Zero the csum in the packet. */ - csum = (u_int16_t*)(buffer + n); + csum = (u_int16_t *) (buffer + n); *(csum) = checksum; /* for the limitation of our implementation */ - if (len > 5000) { - return 0; - } + if (len > 5000) + { + return 0; + } p = buffer; c0 = 0; c1 = 0; - for (i = 0; i < len; i++) { - c0 = c0 + *(p++); - c1 += c0; - } + for (i = 0; i < len; i++) + { + c0 = c0 + *(p++); + c1 += c0; + } c0 = c0 % 255; c1 = c1 % 255; - mul = (len - n)*(c0); - + mul = (len - n) * (c0); + #ifdef FIXED_CODE x = mul - c0 - c1; y = c1 - mul - 1; - if ( y >= 0 ) y++; - if ( x < 0 ) x--; + if (y >= 0) + y++; + if (x < 0) + x--; x %= 255; y %= 255; - if (x == 0) x = 255; - if (y == 0) y = 255; + if (x == 0) + x = 255; + if (y == 0) + y = 255; x &= 0x00FF; @@ -166,12 +172,14 @@ iso_csum_create (u_char *buffer, int len, u_int16_t n) y = c1 - mul - 1; y %= 255; - if (x == 0) x = 255; - if (y == 0) y = 255; + if (x == 0) + x = 255; + if (y == 0) + y = 255; checksum = ((y << 8) | x); #endif - + /* * Now we write this to the packet */ @@ -181,12 +189,8 @@ iso_csum_create (u_char *buffer, int len, u_int16_t n) return checksum; } - int -iso_csum_modify (u_char *buffer, int len, uint16_t *csum) +iso_csum_modify (u_char * buffer, int len, uint16_t * csum) { - return 0; } - - |