1 /* 2 * IP address processing 3 * Copyright (c) 2003-2006, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15 #include "includes.h" 16 17 #include "common.h" 18 #include "ip_addr.h" 19 20 const char * hostapd_ip_txt(const struct hostapd_ip_addr *addr, char *buf, 21 size_t buflen) 22 { 23 if (buflen == 0 || addr == NULL) 24 return NULL; 25 26 if (addr->af == AF_INET) { 27 os_strlcpy(buf, inet_ntoa(addr->u.v4), buflen); 28 } else { 29 buf[0] = '\0'; 30 } 31 #ifdef CONFIG_IPV6 32 if (addr->af == AF_INET6) { 33 if (inet_ntop(AF_INET6, &addr->u.v6, buf, buflen) == NULL) 34 buf[0] = '\0'; 35 } 36 #endif /* CONFIG_IPV6 */ 37 38 return buf; 39 } 40 41 42 int hostapd_ip_diff(struct hostapd_ip_addr *a, struct hostapd_ip_addr *b) 43 { 44 if (a == NULL && b == NULL) 45 return 0; 46 if (a == NULL || b == NULL) 47 return 1; 48 49 switch (a->af) { 50 case AF_INET: 51 if (a->u.v4.s_addr != b->u.v4.s_addr) 52 return 1; 53 break; 54 #ifdef CONFIG_IPV6 55 case AF_INET6: 56 if (os_memcmp(&a->u.v6, &b->u.v6, sizeof(a->u.v6)) != 0) 57 return 1; 58 break; 59 #endif /* CONFIG_IPV6 */ 60 } 61 62 return 0; 63 } 64 65 66 int hostapd_parse_ip_addr(const char *txt, struct hostapd_ip_addr *addr) 67 { 68 #ifndef CONFIG_NATIVE_WINDOWS 69 if (inet_aton(txt, &addr->u.v4)) { 70 addr->af = AF_INET; 71 return 0; 72 } 73 74 #ifdef CONFIG_IPV6 75 if (inet_pton(AF_INET6, txt, &addr->u.v6) > 0) { 76 addr->af = AF_INET6; 77 return 0; 78 } 79 #endif /* CONFIG_IPV6 */ 80 #endif /* CONFIG_NATIVE_WINDOWS */ 81 82 return -1; 83 } 84