1 /* $NetBSD: sockaddr_snprintf.c,v 1.9 2008/04/28 20:23:03 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 #if defined(LIBC_SCCS) && !defined(lint) 33 __RCSID("$NetBSD: sockaddr_snprintf.c,v 1.9 2008/04/28 20:23:03 martin Exp $"); 34 #endif /* LIBC_SCCS and not lint */ 35 36 #include <sys/types.h> 37 #include <sys/socket.h> 38 #include <sys/un.h> 39 40 #include <netinet/in.h> 41 #ifndef __minix 42 #include <netatalk/at.h> 43 #include <net/if_dl.h> 44 #endif 45 46 #include <stdio.h> 47 #include <string.h> 48 #include <errno.h> 49 #include <util.h> 50 #include <netdb.h> 51 52 int 53 sockaddr_snprintf(char * const sbuf, const size_t len, const char * const fmt, 54 const struct sockaddr * const sa) 55 { 56 const void *a = NULL; 57 char abuf[1024], nbuf[1024], *addr = NULL, *w = NULL; 58 char Abuf[1024], pbuf[32], *name = NULL, *port = NULL; 59 char *ebuf = &sbuf[len - 1], *buf = sbuf; 60 const char *ptr, *s; 61 int p = -1; 62 const struct sockaddr_in *sin4 = NULL; 63 #ifndef __minix 64 const struct sockaddr_at *sat = NULL; 65 const struct sockaddr_in6 *sin6 = NULL; 66 const struct sockaddr_un *sun = NULL; 67 const struct sockaddr_dl *sdl = NULL; 68 #endif 69 int na = 1; 70 71 #define ADDC(c) do { if (buf < ebuf) *buf++ = c; else buf++; } \ 72 while (/*CONSTCOND*/0) 73 #define ADDS(p) do { for (s = p; *s; s++) ADDC(*s); } \ 74 while (/*CONSTCOND*/0) 75 #define ADDNA() do { if (na) ADDS("N/A"); } \ 76 while (/*CONSTCOND*/0) 77 78 switch (sa->sa_family) { 79 case AF_UNSPEC: 80 goto done; 81 #ifndef __minix 82 case AF_APPLETALK: 83 sat = ((const struct sockaddr_at *)(const void *)sa); 84 p = ntohs(sat->sat_port); 85 (void)snprintf(addr = abuf, sizeof(abuf), "%u.%u", 86 ntohs(sat->sat_addr.s_net), sat->sat_addr.s_node); 87 (void)snprintf(port = pbuf, sizeof(pbuf), "%d", p); 88 break; 89 case AF_LOCAL: 90 sun = ((const struct sockaddr_un *)(const void *)sa); 91 (void)strlcpy(addr = abuf, sun->sun_path, SUN_LEN(sun)); 92 break; 93 #endif 94 case AF_INET: 95 sin4 = ((const struct sockaddr_in *)(const void *)sa); 96 p = ntohs(sin4->sin_port); 97 a = &sin4->sin_addr; 98 break; 99 #ifndef __minix 100 case AF_INET6: 101 sin6 = ((const struct sockaddr_in6 *)(const void *)sa); 102 p = ntohs(sin6->sin6_port); 103 a = &sin6->sin6_addr; 104 break; 105 case AF_LINK: 106 sdl = ((const struct sockaddr_dl *)(const void *)sa); 107 (void)strlcpy(addr = abuf, link_ntoa(sdl), sizeof(abuf)); 108 if ((w = strchr(addr, ':')) != 0) { 109 *w++ = '\0'; 110 addr = w; 111 } 112 break; 113 #endif 114 default: 115 errno = EAFNOSUPPORT; 116 return -1; 117 } 118 119 if (addr == abuf) 120 name = addr; 121 122 #ifndef __minix 123 if (a && getnameinfo(sa, (socklen_t)sa->sa_len, addr = abuf, 124 #else 125 if (a && getnameinfo(sa, (socklen_t)len, addr = abuf, 126 #endif 127 (unsigned int)sizeof(abuf), NULL, 0, 128 NI_NUMERICHOST|NI_NUMERICSERV) != 0) 129 return -1; 130 131 for (ptr = fmt; *ptr; ptr++) { 132 if (*ptr != '%') { 133 ADDC(*ptr); 134 continue; 135 } 136 next_char: 137 switch (*++ptr) { 138 case '?': 139 na = 0; 140 goto next_char; 141 case 'a': 142 ADDS(addr); 143 break; 144 case 'p': 145 if (p != -1) { 146 (void)snprintf(nbuf, sizeof(nbuf), "%d", p); 147 ADDS(nbuf); 148 } else 149 ADDNA(); 150 break; 151 case 'f': 152 (void)snprintf(nbuf, sizeof(nbuf), "%d", sa->sa_family); 153 ADDS(nbuf); 154 break; 155 case 'l': 156 #ifndef __minix 157 (void)snprintf(nbuf, sizeof(nbuf), "%d", sa->sa_len); 158 #else 159 (void)snprintf(nbuf, sizeof(nbuf), "%d", len); 160 #endif 161 ADDS(nbuf); 162 break; 163 case 'A': 164 if (name) 165 ADDS(name); 166 else if (!a) 167 ADDNA(); 168 else { 169 #ifndef __minix 170 getnameinfo(sa, (socklen_t)sa->sa_len, 171 #else 172 getnameinfo(sa, (socklen_t)len, 173 #endif 174 name = Abuf, 175 (unsigned int)sizeof(nbuf), NULL, 0, 0); 176 ADDS(name); 177 } 178 break; 179 case 'P': 180 if (port) 181 ADDS(port); 182 else if (p == -1) 183 ADDNA(); 184 else { 185 #ifndef __minix 186 getnameinfo(sa, (socklen_t)sa->sa_len, NULL, 0, 187 #else 188 getnameinfo(sa, (socklen_t)len, NULL, 0, 189 #endif 190 port = pbuf, 191 (unsigned int)sizeof(pbuf), 0); 192 ADDS(port); 193 } 194 break; 195 #ifndef __minix 196 case 'I': 197 if (sdl && addr != abuf) { 198 ADDS(abuf); 199 } else { 200 ADDNA(); 201 } 202 break; 203 case 'F': 204 if (sin6) { 205 (void)snprintf(nbuf, sizeof(nbuf), "%d", 206 sin6->sin6_flowinfo); 207 ADDS(nbuf); 208 break; 209 } else { 210 ADDNA(); 211 } 212 break; 213 case 'S': 214 if (sin6) { 215 (void)snprintf(nbuf, sizeof(nbuf), "%d", 216 sin6->sin6_scope_id); 217 ADDS(nbuf); 218 break; 219 } else { 220 ADDNA(); 221 } 222 break; 223 case 'R': 224 if (sat) { 225 const struct netrange *n = 226 &sat->sat_range.r_netrange; 227 (void)snprintf(nbuf, sizeof(nbuf), 228 "%d:[%d,%d]", n->nr_phase , n->nr_firstnet, 229 n->nr_lastnet); 230 ADDS(nbuf); 231 } else { 232 ADDNA(); 233 } 234 break; 235 #endif 236 default: 237 ADDC('%'); 238 if (na == 0) 239 ADDC('?'); 240 if (*ptr == '\0') 241 goto done; 242 /*FALLTHROUGH*/ 243 case '%': 244 ADDC(*ptr); 245 break; 246 } 247 na = 1; 248 } 249 done: 250 if (buf < ebuf) 251 *buf = '\0'; 252 else if (len != 0) 253 sbuf[len - 1] = '\0'; 254 return (int)(buf - sbuf); 255 } 256