84 	ssize_t	mlen;  in ip_cksum()  local
122 			if ((mlen = dp->db_cksumstart - offset) < 0)  in ip_cksum()
123 				mlen = 0;  in ip_cksum()
124 			if (is_odd(mlen))  in ip_cksum()
126 			if (mlen && dp->db_cksumstart != dp->db_cksumstuff &&  in ip_cksum()
135 				sum = ip_ocsum(w, mlen >> 1, sum);  in ip_cksum()
142 				mlen = dp->db_cksumend - dp->db_cksumstuff;  in ip_cksum()
150 				if (mlen)  in ip_cksum()
151 					mlen += dp->db_cksumend  in ip_cksum()
158 					mlen = dp->db_cksumend  in ip_cksum()
161 			} else if (mlen == 0)  in ip_cksum()
164 			if (is_odd(mlen))  in ip_cksum()
172 			mlen = mp->b_wptr - (uchar_t *)w;  in ip_cksum()
173 			if (is_odd(mlen))  in ip_cksum()
177 		ASSERT(is_even(mlen));  in ip_cksum()
178 		return (ip_ocsum(w, mlen >> 1, sum));  in ip_cksum()
185 	mlen = 0;  in ip_cksum()
198 			mlen = 0;  in ip_cksum()
220 			if ((mlen = dp->db_cksumstart - offset) < 0)  in ip_cksum()
221 				mlen = 0;  in ip_cksum()
222 			if (mlen && dp->db_cksumstart != dp->db_cksumstuff) {  in ip_cksum()
258 					if (mlen)  in ip_cksum()
259 						mlen += dp->db_cksumend  in ip_cksum()
264 						mlen = dp->db_cksumend -  in ip_cksum()
274 			mlen = mp->b_wptr - (uchar_t *)w;  in ip_cksum()
278 		if (mlen > 0 && pmlen == -1) {  in ip_cksum()
293 			mlen--;  in ip_cksum()
296 		if (mlen > 0) {  in ip_cksum()
298 				sum = ip_ocsum(w, mlen>>1, sum);  in ip_cksum()
299 				w += mlen>>1;  in ip_cksum()
307 				if (is_odd(mlen)) {  in ip_cksum()
322 				mlen--;  in ip_cksum()
326 				swsum = ip_ocsum(w, mlen>>1, 0);  in ip_cksum()
328 				w += mlen>>1;  in ip_cksum()
337 				if (is_odd(mlen)) {  in ip_cksum()
428 	ssize_t		mlen, i;  in ip_md_cksum()  local
447 		mlen = reg_end - (uchar_t *)w;  in ip_md_cksum()
449 		if (mlen > 0 && byteleft) {  in ip_md_cksum()
464 			mlen--;  in ip_md_cksum()
468 		if (mlen == 0)  in ip_md_cksum()
472 			sum = ip_ocsum(w, mlen >> 1, sum);  in ip_md_cksum()
473 			w += mlen >> 1;  in ip_md_cksum()
481 			if (is_odd(mlen)) {  in ip_md_cksum()
496 			mlen--;  in ip_md_cksum()
500 			swsum = ip_ocsum(w, mlen >> 1, 0);  in ip_md_cksum()
502 			w += mlen >> 1;  in ip_md_cksum()
511 			if (is_odd(mlen)) {  in ip_md_cksum()