#include #include #include #include #include #include #include "ip_type.h" #include "hash.h" #include "stringdump.h" #include "hostentdb.h" #include "common.h" #include "debug.h" #define STEP 16 static void hdb_add(struct hostent_list* hl, char* host, ip_type ip) { if(hl->count +1 > hl->capa) { void * nu = realloc(hl->entries, (hl->capa + STEP) * sizeof(struct hostent_entry)); if(!nu) return; hl->entries = nu; hl->capa += STEP; } struct hostent_entry *h = &hl->entries[hl->count]; h->hash = dalias_hash(host); h->ip.as_int = ip.as_int; h->str = dumpstring(host, strlen(host) + 1); if(h->str) hl->count++; } static void hdb_fill(struct hostent_list *hl) { struct hostent* hp; while((hp = gethostent())) if(hp->h_addrtype == AF_INET && hp->h_length == sizeof(in_addr_t)) { hdb_add(hl, hp->h_name, (ip_type) { .as_int = *((in_addr_t*)(hp->h_addr_list[0])) }); } } void hdb_init(struct hostent_list *hl) { memset(hl, 0, sizeof *hl); hdb_fill(hl); } ip_type hdb_get(struct hostent_list *hl, char* host) { size_t i; PFUNC(); uint32_t hash = dalias_hash(host); for(i = 0; i < hl->count; i++) { if(hl->entries[i].hash == hash && !strcmp(hl->entries[i].str, host)) { #ifdef DEBUG char ipbuf[16]; pc_stringfromipv4(hl->entries[i].ip.octet, ipbuf); PDEBUG("got ip %s for hostent entry %s\n", ipbuf, host); #endif return hl->entries[i].ip; } } return ip_type_invalid; }