1 /* 2 * IP address processing 3 * Copyright (c) 2003-2006, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #include "includes.h" 10 11 #include "common.h" 12 #include "ip_addr.h" 13 14 const char * hostapd_ip_txt(const struct hostapd_ip_addr *addr, char *buf, 15 size_t buflen) 16 { 17 if (buflen == 0 || addr == NULL) 18 return NULL; 19 20 if (addr->af == AF_INET) { 21 os_strlcpy(buf, inet_ntoa(addr->u.v4), buflen); 22 } else { 23 buf[0] = '\0'; 24 } 25 #ifdef CONFIG_IPV6 26 if (addr->af == AF_INET6) { 27 if (inet_ntop(AF_INET6, &addr->u.v6, buf, buflen) == NULL) 28 buf[0] = '\0'; 29 } 30 #endif /* CONFIG_IPV6 */ 31 32 return buf; 33 } 34 35 36 int hostapd_ip_diff(struct hostapd_ip_addr *a, struct hostapd_ip_addr *b) 37 { 38 if (a == NULL && b == NULL) 39 return 0; 40 if (a == NULL || b == NULL) 41 return 1; 42 43 switch (a->af) { 44 case AF_INET: 45 if (a->u.v4.s_addr != b->u.v4.s_addr) 46 return 1; 47 break; 48 #ifdef CONFIG_IPV6 49 case AF_INET6: 50 if (os_memcmp(&a->u.v6, &b->u.v6, sizeof(a->u.v6)) != 0) 51 return 1; 52 break; 53 #endif /* CONFIG_IPV6 */ 54 } 55 56 return 0; 57 } 58 59 60 int hostapd_parse_ip_addr(const char *txt, struct hostapd_ip_addr *addr) 61 { 62 #ifndef CONFIG_NATIVE_WINDOWS 63 if (inet_aton(txt, &addr->u.v4)) { 64 addr->af = AF_INET; 65 return 0; 66 } 67 68 #ifdef CONFIG_IPV6 69 if (inet_pton(AF_INET6, txt, &addr->u.v6) > 0) { 70 addr->af = AF_INET6; 71 return 0; 72 } 73 #endif /* CONFIG_IPV6 */ 74 #endif /* CONFIG_NATIVE_WINDOWS */ 75 76 return -1; 77 } 78