Lines Matching refs:NULL

244   if (dns_pcb == NULL) {
247     if (dns_pcb != NULL) {
255       udp_recv(dns_pcb, dns_recv, NULL);
275   if ((numdns < DNS_MAX_SERVERS) && (dns_pcb != NULL) &&
276       (dnsserver != NULL) && !ip_addr_isany(dnsserver)) {
305   if (dns_pcb != NULL) {
323     LWIP_ASSERT("invalid host name (NULL)", init_entry->name != NULL);
327     LWIP_ASSERT("mem-error in dns_init_local", entry != NULL);
328     if (entry != NULL) {
352   while(entry != NULL) {
383   struct local_hostlist_entry *last_entry = NULL;
384   while (entry != NULL) {
385     if (((hostname == NULL) || !strcmp(entry->name, hostname)) &&
386         ((addr == NULL) || ip_addr_cmp(&entry->addr, addr))) {
388       if (last_entry != NULL) {
418   LWIP_ASSERT("invalid host name (NULL)", hostname != NULL);
422   if (entry == NULL) {
467   /* Walk through name list, return entry if found. If not, return NULL. */
578   if (p != NULL) {
579     LWIP_ASSERT("pbuf must be in one piece", p->next == NULL);
674               (*pEntry->found)(pEntry->name, NULL, pEntry->arg);
677             pEntry->found   = NULL;
701         pEntry->found = NULL;
837   /* ERROR: call specified callback function with NULL as name to indicate an error */
839     (*pEntry->found)(pEntry->name, NULL, pEntry->arg);
843   pEntry->found = NULL;
864   struct dns_table_entry *pEntry = NULL;
942   if ((dns_pcb == NULL) || (addr == NULL) ||