usr.sbin/ppp/slcompress.c

163   register struct cstate *cs = comp->last_cs->cs_next;
198   if (ip->ip_src.s_addr != cs->cs_ip.ip_src.s_addr ||
199       ip->ip_dst.s_addr != cs->cs_ip.ip_dst.s_addr ||
200       *(int *) th != ((int *) &cs->cs_ip)[cs->cs_ip.ip_hl]) {
216       lcs = cs;
217       cs = cs->cs_next;
219       if (ip->ip_src.s_addr == cs->cs_ip.ip_src.s_addr
220 	  && ip->ip_dst.s_addr == cs->cs_ip.ip_dst.s_addr
221 	  && *(int *) th == ((int *) &cs->cs_ip)[cs->cs_ip.ip_hl])
223     } while (cs != lastcs);
246     if (cs == lastcs)
249       lcs->cs_next = cs->cs_next;
250       cs->cs_next = lastcs->cs_next;
251       lastcs->cs_next = cs;
265   oth = (struct tcphdr *) & ((int *) &cs->cs_ip)[hlen];
272   if (((u_short *) ip)[0] != ((u_short *) & cs->cs_ip)[0] ||
273       ((u_short *) ip)[3] != ((u_short *) & cs->cs_ip)[3] ||
274       ((u_short *) ip)[4] != ((u_short *) & cs->cs_ip)[4] ||
277        memcmp(ip + 1, &cs->cs_ip + 1, (deltaS - 5) << 2)) ||
333     if (ip->ip_len != cs->cs_ip.ip_len &&
334 	ntohs(cs->cs_ip.ip_len) == hlen)
350 	deltaS == ntohs(cs->cs_ip.ip_len) - hlen) {
358     if (deltaS == ntohs(cs->cs_ip.ip_len) - hlen) {
366   deltaS = ntohs(ip->ip_id) - ntohs(cs->cs_ip.ip_id);
379   memcpy(&cs->cs_ip, ip, hlen);
397   if (comp->last_xmit == cs->cs_id && compress_cid) {
402     comp->last_xmit = cs->cs_id;
406     *cp++ = cs->cs_id;
417    * Update connection state cs & send uncompressed packet ('uncompressed'
422   memcpy(&cs->cs_ip, ip, hlen);
423   ip->ip_p = cs->cs_id;
424   comp->last_xmit = cs->cs_id;
436   register struct cstate *cs;
446     cs = &comp->rstate[comp->last_recv = ip->ip_p];
461     memcpy(&cs->cs_ip, ip, hlen);
462     cs->cs_hlen = hlen;
500   cs = &comp->rstate[comp->last_recv];
501   hlen = cs->cs_ip.ip_hl << 2;
502   th = (struct tcphdr *) & ((u_char *) & cs->cs_ip)[hlen];
513       register u_int i = ntohs(cs->cs_ip.ip_len) - cs->cs_hlen;
521     th->th_seq = htonl(ntohl(th->th_seq) + ntohs(cs->cs_ip.ip_len)
522 		       - cs->cs_hlen);
543     DECODES(cs->cs_ip.ip_id)
545     cs->cs_ip.ip_id = htons(ntohs(cs->cs_ip.ip_id) + 1);
548 	    cs->cs_ip.ip_id, (u_long)ntohl(th->th_seq));
565   *bufp = cp - cs->cs_hlen;
566   len += cs->cs_hlen;
567   cs->cs_ip.ip_len = htons(len);
570   cs->cs_ip.ip_sum = 0;
571   bp = (u_short *)&cs->cs_ip;
576   cs->cs_ip.ip_sum = ~changes;
579   memcpy(*bufp, &cs->cs_ip, cs->cs_hlen);