src/core/tcp_in.c

66 static struct tcp_hdr *tcphdr;
106     tcphdr = (struct tcp_hdr *) ((u8_t *) p->payload + IPH_HL(iphdr) * 4);
109     tcp_debug_print(tcphdr);
152         tcp_debug_print(tcphdr);
164     hdrlen = TCPH_HDRLEN(tcphdr);
176     tcphdr->src = ntohs(tcphdr->src);
177     tcphdr->dest = ntohs(tcphdr->dest);
178     seqno = tcphdr->seqno = ntohl(tcphdr->seqno);
179     ackno = tcphdr->ackno = ntohl(tcphdr->ackno);
180     tcphdr->wnd = ntohs(tcphdr->wnd);
182     flags = TCPH_FLAGS(tcphdr);
197         if (pcb->remote_port == tcphdr->src && pcb->local_port == tcphdr->dest
226             if (pcb->remote_port == tcphdr->src
227                 && pcb->local_port == tcphdr->dest
248                 && lpcb->local_port == tcphdr->dest) {
271     tcp_debug_print_flags(TCPH_FLAGS(tcphdr));
289         inseg.tcphdr = tcphdr;
387         if (!(TCPH_FLAGS(tcphdr) & TCP_RST)) {
391                     &(iphdr->dest), &(iphdr->src), tcphdr->dest, tcphdr->src);
425                 tcphdr->dest, tcphdr->src);
429                      tcphdr->src, tcphdr->dest));
434                          U16_F "\n", tcphdr->dest));
455         npcb->remote_port = tcphdr->src;
459         npcb->snd_wnd = tcphdr->wnd;
588                          ntohl(pcb->unacked->tcphdr->seqno)));
591                 && ackno == ntohl(pcb->unacked->tcphdr->seqno) + 1) {
596                 pcb->snd_wnd = tcphdr->wnd;
637                         tcphdr->dest, tcphdr->src);
649                                  U16_F ".\n", inseg.tcphdr->src,
650                                  inseg.tcphdr->dest));
678                             &(iphdr->src), tcphdr->dest, tcphdr->src);
700                                  ".\n", inseg.tcphdr->src, inseg.tcphdr->dest));
719                              ".\n", inseg.tcphdr->src, inseg.tcphdr->dest));
732                              ".\n", inseg.tcphdr->src, inseg.tcphdr->dest));
744                              ".\n", inseg.tcphdr->src, inseg.tcphdr->dest));
789             (pcb->snd_wl2 == ackno && tcphdr->wnd > pcb->snd_wnd)) {
790             pcb->snd_wnd = tcphdr->wnd;
801             if (pcb->snd_wnd != tcphdr->wnd) {
823                                      ntohl(pcb->unacked->tcphdr->seqno)));
911                          NULL ? ntohl(pcb->unacked->tcphdr->seqno) : 0,
913                          NULL ? ntohl(pcb->unacked->tcphdr->seqno) +
919                    TCP_SEQ_LEQ(ntohl(pcb->unacked->tcphdr->seqno) +
924                              ntohl(pcb->unacked->tcphdr->seqno),
925                              ntohl(pcb->unacked->tcphdr->seqno) +
972                TCP_SEQ_BETWEEN(ackno, ntohl(pcb->unsent->tcphdr->seqno) +
977                          ntohl(pcb->unsent->tcphdr->seqno),
978                          ntohl(pcb->unsent->tcphdr->seqno) +
1120             inseg.tcphdr->seqno = seqno = pcb->rcv_nxt;
1151                     if (TCPH_FLAGS(inseg.tcphdr) & TCP_FIN) {
1154                         TCPH_FLAGS_SET(inseg.tcphdr,
1155                                        TCPH_FLAGS(inseg.tcphdr) & ~TCP_FIN);
1159                     if (TCPH_FLAGS(inseg.tcphdr) & TCP_SYN) {
1170                     if (TCPH_FLAGS(inseg.tcphdr) & TCP_FIN) {
1184                           (pcb->ooseq->tcphdr->seqno, seqno + tcplen)) {
1189                                TCP_SEQ_GT(pcb->ooseq->tcphdr->seqno, seqno));
1192                               (u16_t) (pcb->ooseq->tcphdr->seqno - seqno);
1193                             if (TCPH_FLAGS(inseg.tcphdr) & TCP_SYN) {
1200                                (seqno + tcplen) == pcb->ooseq->tcphdr->seqno);
1203                             if ((TCPH_FLAGS(inseg.tcphdr) & (TCP_FIN | TCP_SYN))
1205                                 (TCPH_FLAGS(pcb->ooseq->tcphdr) &
1242                 if (TCPH_FLAGS(inseg.tcphdr) & TCP_FIN) {
1251                        pcb->ooseq->tcphdr->seqno == pcb->rcv_nxt) {
1254                     seqno = pcb->ooseq->tcphdr->seqno;
1273                     if (TCPH_FLAGS(cseg->tcphdr) & TCP_FIN) {
1314                         if (seqno == next->tcphdr->seqno) {
1336                                              next->tcphdr->seqno)) {
1339                                               (u16_t) (next->tcphdr->seqno -
1354                                 if (TCP_SEQ_LT(seqno, next->tcphdr->seqno)) {
1362                                          next->tcphdr->seqno)) {
1365                                           (u16_t) (next->tcphdr->seqno - seqno);
1376                                 /*if (TCP_SEQ_LT(prev->tcphdr->seqno, seqno) &&
1377                                    TCP_SEQ_LT(seqno, next->tcphdr->seqno)) { */
1379                                     (seqno, prev->tcphdr->seqno + 1,
1380                                          next->tcphdr->seqno - 1)) {
1387                                     (seqno + inseg.len, next->tcphdr->seqno)) {
1390                                       (u16_t) (next->tcphdr->seqno - seqno);
1399                                         (prev->tcphdr->seqno + prev->len,
1403                                           (u16_t) (seqno - prev->tcphdr->seqno);
1413                                 TCP_SEQ_GT(seqno, next->tcphdr->seqno)) {
1417                                         (next->tcphdr->seqno + next->len,
1421                                           (u16_t) (seqno - next->tcphdr->seqno);
1468     opts = (u8_t *) tcphdr + TCP_HLEN;
1471     if (TCPH_HDRLEN(tcphdr) > 0x5) {
1472         max_c = (TCPH_HDRLEN(tcphdr) - 5) << 2;