81 ip_cksum(mblk_t *mp, int offset, uint_t sum)  in ip_cksum()  argument
135 				sum = ip_ocsum(w, mlen >> 1, sum);  in ip_cksum()
166 			sum += psum;  in ip_cksum()
178 		return (ip_ocsum(w, mlen >> 1, sum));  in ip_cksum()
244 					sum += ((psum << 8) & 0xffff)  in ip_cksum()
249 					sum += psum;  in ip_cksum()
285 			 * high part of (32 bit) sum is small  in ip_cksum()
289 			sum += *(uchar_t *)w << 8;  in ip_cksum()
291 			sum += *(uchar_t *)w;  in ip_cksum()
299 				sum = ip_ocsum(w, mlen>>1, sum);  in ip_cksum()
304 				 * part of the sum, and we take the  in ip_cksum()
305 				 * first byte to the low part of the sum  in ip_cksum()
310 					sum += *(uchar_t *)w;  in ip_cksum()
312 					sum += *(uchar_t *)w << 8;  in ip_cksum()
319 				sum += *(uchar_t *)w;  in ip_cksum()
321 				sum += *(uchar_t *)w << 8;  in ip_cksum()
328 				sum += ((swsum << 8) & 0xffff) | (swsum >> 8);  in ip_cksum()
333 				 * part of the sum.  Otherwise we had an  in ip_cksum()
335 				 * byte to the low part of the sum the  in ip_cksum()
340 					sum += *(uchar_t *)w << 8;  in ip_cksum()
342 					sum += *(uchar_t *)w;  in ip_cksum()
373 	 * Add together high and low parts of sum  in ip_cksum()
378 	sum = (sum & 0xFFFF) + (sum >> 16);  in ip_cksum()
379 	sum = (sum & 0xFFFF) + (sum >> 16);  in ip_cksum()
381 	    "ip_cksum_end:(%S) type %d (%X)", "ip_cksum", 1, sum);  in ip_cksum()
382 	return (sum);  in ip_cksum()
409 	uint32_t	sum;  in ip_csum_hdr()  local
415 	sum = uph[0] + uph[1] + uph[2] + uph[3] + uph[4] +  in ip_csum_hdr()
419 			sum += uph[10];  in ip_csum_hdr()
420 			sum += uph[11];  in ip_csum_hdr()
424 	sum = (sum & 0xFFFF) + (sum >> 16);  in ip_csum_hdr()
425 	sum = ~(sum + (sum >> 16)) & 0xFFFF;  in ip_csum_hdr()
426 	if (sum == 0xffff)  in ip_csum_hdr()
427 		sum = 0;  in ip_csum_hdr()
428 	return ((uint16_t)sum);  in ip_csum_hdr()