inet::sctp::SctpChecksum Class Reference

Calculates checksum. More...

#include <SctpChecksum.h>

Public Member Functions
	SctpChecksum ()

Static Public Member Functions
static uint32_t	checksum (const void *addr, unsigned int count)

Detailed Description

Calculates checksum.

Constructor & Destructor Documentation

SctpChecksum()

inet::sctp::SctpChecksum::SctpChecksum ( )

inline

{}

Member Function Documentation

checksum()

uint32_t inet::sctp::SctpChecksum::checksum ( const void *  addr, unsigned int  count  )

static

{
    uint32_t h;
    const uint8_t *buf = static_cast<const uint8_t *>(addr);
    unsigned char byte0, byte1, byte2, byte3;
    uint32_t crc32c;
    uint32_t i;
    uint32_t res = (~0L);
    for (i = 0; i < len; i++) {
        CRC32C(res, buf[i]);
    }
    h = ~res;
    byte0 = h & 0xff;
    byte1 = (h >> 8) & 0xff;
    byte2 = (h >> 16) & 0xff;
    byte3 = (h >> 24) & 0xff;
    crc32c = ((byte0 << 24) | (byte1 << 16) | (byte2 << 8) | byte3);
    return htonl(crc32c);
}

Referenced by inet::sctp::SctpHeaderSerializer::deserialize(), inet::sctp::SctpCrcInsertion::insertCrc(), and inet::sctp::SctpHeaderSerializer::serialize().

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The documentation for this class was generated from the following files:

• SctpChecksum.h
• SctpChecksum.cc