Lines Matching refs:NULL

99   if (p != NULL) {
128   if (pcb->unsent != NULL) {
130     for (last_unsent = pcb->unsent; last_unsent->next != NULL;
154  * @return a new tcp_seg pointing to p, or NULL.
164   if ((seg = (struct tcp_seg *)memp_malloc(MEMP_TCP_SEG)) == NULL) {
167     return NULL;
170   seg->next = NULL;
189     return NULL;
249           pcb->unsent != NULL ||
250           pcb->unacked != NULL))) {
256   if (p == NULL) {
257     return NULL;
259   LWIP_ASSERT("need unchained pbuf", p->next == NULL);
329       pcb->unacked != NULL || pcb->unsent != NULL);
332       pcb->unacked == NULL && pcb->unsent == NULL);
356   struct pbuf *concat_p = NULL;
357   struct tcp_seg *last_unsent = NULL, *seg = NULL, *prev_seg = NULL, *queue = NULL;
382   LWIP_ERROR("tcp_write: arg == NULL (programmer violates API)", 
383              arg != NULL, return ERR_ARG;);
422   if (pcb->unsent != NULL) {
427     for (last_unsent = pcb->unsent; last_unsent->next != NULL;
476         if ((concat_p = tcp_pbuf_prealloc(PBUF_RAW, seglen, space, &oversize, pcb, apiflags, 1)) == NULL) {
491         if ((concat_p = pbuf_alloc(PBUF_RAW, seglen, PBUF_ROM)) == NULL) {
511     LWIP_ASSERT("unsent_oversize mismatch (pcb->unsent is NULL)",
535       if ((p = tcp_pbuf_prealloc(PBUF_TRANSPORT, seglen + optlen, mss_local, &oversize, pcb, apiflags, queue == NULL)) == NULL) {
552       if ((p2 = pbuf_alloc(PBUF_TRANSPORT, seglen, PBUF_ROM)) == NULL) {
564       if ((p = pbuf_alloc(PBUF_TRANSPORT, optlen, PBUF_RAM)) == NULL) {
586     if ((seg = tcp_create_segment(pcb, p, 0, pcb->snd_lbb + pos, optflags)) == NULL) {
599     if (queue == NULL) {
603       LWIP_ASSERT("prev_seg != NULL", prev_seg != NULL);
631       if (p->next == NULL) {
649   if (concat_p != NULL) {
651       (last_unsent != NULL));
664    * Phase 3: Append queue to pcb->unsent. Queue may be NULL, but that
667   if (last_unsent == NULL) {
684                 pcb->unacked != NULL || pcb->unsent != NULL);
688   if (seg != NULL && seg->tcphdr != NULL && ((apiflags & TCP_WRITE_FLAG_MORE)==0)) {
697   if (concat_p != NULL) {
700   if (queue != NULL) {
704     LWIP_ASSERT("tcp_write: valid queue length", pcb->unacked != NULL ||
705       pcb->unsent != NULL);
718  * @param optdata pointer to TCP options, or NULL.
764   if ((p = pbuf_alloc(PBUF_TRANSPORT, optlen, PBUF_RAM)) == NULL) {
773   if ((seg = tcp_create_segment(pcb, p, flags, pcb->snd_lbb, optflags)) == NULL) {
788   if (pcb->unsent == NULL) {
792     for (useg = pcb->unsent; useg->next != NULL; useg = useg->next);
815       pcb->unacked != NULL || pcb->unsent != NULL);
855   if (p == NULL) {
929      (seg == NULL ||
936   if (useg != NULL) {
937     for (; useg->next != NULL; useg = useg->next);
941   if (seg == NULL) {
947   if (seg == NULL) {
950                                  ", seg == NULL, ack %"U32_F"\n",
962   while (seg != NULL &&
970      *   either seg->next != NULL or pcb->unacked == NULL;
1000       seg->next = NULL;
1002       if (pcb->unacked == NULL) {
1032   if (pcb->unsent == NULL) {
1099     if (netif == NULL) {
1202   if (p == NULL) {
1243   if (pcb->unacked == NULL) {
1248   for (seg = pcb->unacked; seg->next != NULL; seg = seg->next);
1254   pcb->unacked = NULL;
1280   if (pcb->unacked == NULL) {
1297   if (seg->next == NULL) {
1323   if (pcb->unacked != NULL && !(pcb->flags & TF_INFR)) {
1377   if(p == NULL) {
1435   if(seg == NULL) {
1438   if(seg == NULL) {
1447   if(p == NULL) {