Differential D13594 Diff 36929 sys/netinet/sctp_crc32.c

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sys/netinet/sctp_crc32.c

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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)		* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF		* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.		* THE POSSIBILITY OF SUCH DAMAGE.
*/		*/

#include <sys/cdefs.h>		#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");		__FBSDID("$FreeBSD$");

		#include "opt_sctp.h"

#include <netinet/sctp_os.h>		#include <netinet/sctp_os.h>
#include <netinet/sctp.h>		#include <netinet/sctp.h>
#include <netinet/sctp_crc32.h>		#include <netinet/sctp_crc32.h>
#include <netinet/sctp_pcb.h>		#include <netinet/sctp_pcb.h>



static uint32_t		static uint32_t
▲ Show 20 Lines • Show All 64 Lines • ▼ Show 20 Lines	if (offset) {
offset -= SCTP_BUF_LEN(at);		offset -= SCTP_BUF_LEN(at);
}		}
at = SCTP_BUF_NEXT(at);		at = SCTP_BUF_NEXT(at);
}		}
base = sctp_finalize_crc32c(base);		base = sctp_finalize_crc32c(base);
return (base);		return (base);
}		}

		#ifdef SCTP
void		void
sctp_delayed_cksum(struct mbuf *m, uint32_t offset)		sctp_delayed_cksum(struct mbuf *m, uint32_t offset)
{		{
uint32_t checksum;		uint32_t checksum;

checksum = sctp_calculate_cksum(m, offset);		checksum = sctp_calculate_cksum(m, offset);
SCTP_STAT_DECR(sctps_sendhwcrc);		SCTP_STAT_DECR(sctps_sendhwcrc);
SCTP_STAT_INCR(sctps_sendswcrc);		SCTP_STAT_INCR(sctps_sendswcrc);
offset += offsetof(struct sctphdr, checksum);		offset += offsetof(struct sctphdr, checksum);

if (offset + sizeof(uint32_t) > (uint32_t)(m->m_len)) {		if (offset + sizeof(uint32_t) > (uint32_t)(m->m_len)) {
SCTP_PRINTF("sctp_delayed_cksum(): m->len: %d, off: %d.\n",		SCTP_PRINTF("sctp_delayed_cksum(): m->len: %d, off: %d.\n",
(uint32_t)m->m_len, offset);		(uint32_t)m->m_len, offset);
/*		/*
* XXX this shouldn't happen, but if it does, the correct		* XXX this shouldn't happen, but if it does, the correct
* behavior may be to insert the checksum in the appropriate		* behavior may be to insert the checksum in the appropriate
* next mbuf in the chain.		* next mbuf in the chain.
*/		*/
return;		return;
}		}
(uint32_t )(m->m_data + offset) = checksum;		(uint32_t )(m->m_data + offset) = checksum;
}		}
		#endif /* SCTP */