sys/net/slcompress.c

161 	register struct cstate *cs = comp->last_cs->cs_next;
190 	if (ip->ip_src.s_addr != cs->cs_ip.ip_src.s_addr ||
191 	    ip->ip_dst.s_addr != cs->cs_ip.ip_dst.s_addr ||
192 	    *(int32_t *)th != ((int32_t *)&cs->cs_ip)[cs->cs_ip.ip_hl]) {
209 			lcs = cs; cs = cs->cs_next;
211 			if (ip->ip_src.s_addr == cs->cs_ip.ip_src.s_addr
212 			    && ip->ip_dst.s_addr == cs->cs_ip.ip_dst.s_addr
214 			    ((int32_t *)&cs->cs_ip)[cs->cs_ip.ip_hl])
216 		} while (cs != lastcs);
238 		if (cs == lastcs)
241 			lcs->cs_next = cs->cs_next;
242 			cs->cs_next = lastcs->cs_next;
243 			lastcs->cs_next = cs;
258 	oth = (struct tcphdr *)&((int32_t *)&cs->cs_ip)[hlen];
265 	if (((u_int16_t *)ip)[0] != ((u_int16_t *)&cs->cs_ip)[0] ||
266 	    ((u_int16_t *)ip)[3] != ((u_int16_t *)&cs->cs_ip)[3] ||
267 	    ((u_int16_t *)ip)[4] != ((u_int16_t *)&cs->cs_ip)[4] ||
270 	     BCMP(ip + 1, &cs->cs_ip + 1, (deltaS - 5) << 2)) ||
325 		if (ip->ip_len != cs->cs_ip.ip_len &&
326 		    ntohs(cs->cs_ip.ip_len) == hlen)
341 		    deltaS == ntohs(cs->cs_ip.ip_len) - hlen) {
349 		if (deltaS == ntohs(cs->cs_ip.ip_len) - hlen) {
357 	deltaS = ntohs(ip->ip_id) - ntohs(cs->cs_ip.ip_id);
369 	BCOPY(ip, &cs->cs_ip, hlen);
382 	if (compress_cid == 0 || comp->last_xmit != cs->cs_id) {
383 		comp->last_xmit = cs->cs_id;
387 		*cp++ = cs->cs_id;
402 	 * Update connection state cs & send uncompressed packet ('uncompressed'
407 	BCOPY(ip, &cs->cs_ip, hlen);
408 	ip->ip_p = cs->cs_id;
409 	comp->last_xmit = cs->cs_id;
474 	register struct cstate *cs;
485 		cs = &comp->rstate[comp->last_recv = ip->ip_p];
498 		BCOPY(ip, &cs->cs_ip, hlen);
499 		cs->cs_hlen = hlen;
501 		*hdrp = (u_char *) &cs->cs_ip;
532 	cs = &comp->rstate[comp->last_recv];
533 	hlen = cs->cs_ip.ip_hl << 2;
534 	th = (struct tcphdr *)&((u_char *)&cs->cs_ip)[hlen];
545 		register u_int i = ntohs(cs->cs_ip.ip_len) - cs->cs_hlen;
552 		th->th_seq = htonl(ntohl(th->th_seq) + ntohs(cs->cs_ip.ip_len)
553 				   - cs->cs_hlen);
571 		DECODES(cs->cs_ip.ip_id)
573 		cs->cs_ip.ip_id = htons(ntohs(cs->cs_ip.ip_id) + 1);
587 	total_len += cs->cs_hlen - vjlen;
588 	cs->cs_ip.ip_len = htons(total_len);
591 	bp = (u_int16_t *) &cs->cs_ip;
592 	cs->cs_ip.ip_sum = 0;
597 	cs->cs_ip.ip_sum = ~ changes;
599 	*hdrp = (u_char *) &cs->cs_ip;
600 	*hlenp = cs->cs_hlen;