sockaddr_snprintf.c revision 1.11
1 /* $NetBSD: sockaddr_snprintf.c,v 1.11 2013/12/31 12:58:02 mlelstv 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 1.11 2013/12/31 12:58:02 mlelstv 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 #include <netatalk/at.h> 42 #include <net/if_dl.h> 43 44 #include <stdio.h> 45 #include <string.h> 46 #include <errno.h> 47 #include <stdlib.h> 48 #include <util.h> 49 #include <netdb.h> 50 51 static int 52 debug_at(char *str, size_t len, const struct sockaddr_at *sat) 53 { 54 return snprintf(str, len, "sat_len=%u, sat_family=%u, sat_port=%u, " 55 "sat_addr.s_net=%u, sat_addr.s_node=%u, " 56 "sat_range.r_netrange.nr_phase=%u, " 57 "sat_range.r_netrange.nr_firstnet=%u, " 58 "sat_range.r_netrange.nr_lastnet=%u", 59 sat->sat_len, sat->sat_family, sat->sat_port, 60 sat->sat_addr.s_net, sat->sat_addr.s_node, 61 sat->sat_range.r_netrange.nr_phase, 62 sat->sat_range.r_netrange.nr_firstnet, 63 sat->sat_range.r_netrange.nr_lastnet); 64 } 65 66 static int 67 debug_in(char *str, size_t len, const struct sockaddr_in *sin) 68 { 69 return snprintf(str, len, "sin_len=%u, sin_family=%u, sin_port=%u, " 70 "sin_addr.s_addr=%08x", 71 sin->sin_len, sin->sin_family, sin->sin_port, 72 sin->sin_addr.s_addr); 73 } 74 75 static int 76 debug_in6(char *str, size_t len, const struct sockaddr_in6 *sin6) 77 { 78 const uint8_t *s = sin6->sin6_addr.s6_addr; 79 80 return snprintf(str, len, "sin6_len=%u, sin6_family=%u, sin6_port=%u, " 81 "sin6_flowinfo=%u, " 82 "sin6_addr=%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:" 83 "%02x:%02x:%02x:%02x:%02x:%02x, sin6_scope_id=%u", 84 sin6->sin6_len, sin6->sin6_family, sin6->sin6_port, 85 sin6->sin6_flowinfo, s[0x0], s[0x1], s[0x2], s[0x3], s[0x4], s[0x5], 86 s[0x6], s[0x7], s[0x8], s[0x9], s[0xa], s[0xb], s[0xc], s[0xd], 87 s[0xe], s[0xf], sin6->sin6_scope_id); 88 } 89 90 static int 91 debug_un(char *str, size_t len, const struct sockaddr_un *sun) 92 { 93 return snprintf(str, len, "sun_len=%u, sun_family=%u, sun_path=%*s", 94 sun->sun_len, sun->sun_family, (int)sizeof(sun->sun_path), 95 sun->sun_path); 96 } 97 98 static int 99 debug_dl(char *str, size_t len, const struct sockaddr_dl *sdl) 100 { 101 const uint8_t *s = (const void *)sdl->sdl_data; 102 103 return snprintf(str, len, "sdl_len=%u, sdl_family=%u, sdl_index=%u, " 104 "sdl_type=%u, sdl_nlen=%u, sdl_alen=%u, sdl_slen=%u, sdl_data=" 105 "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x", 106 sdl->sdl_len, sdl->sdl_family, sdl->sdl_index, 107 sdl->sdl_type, sdl->sdl_nlen, sdl->sdl_alen, sdl->sdl_slen, 108 s[0x0], s[0x1], s[0x2], s[0x3], s[0x4], s[0x5], 109 s[0x6], s[0x7], s[0x8], s[0x9], s[0xa], s[0xb]); 110 } 111 112 int 113 sockaddr_snprintf(char * const sbuf, const size_t len, const char * const fmt, 114 const struct sockaddr * const sa) 115 { 116 const void *a = NULL; 117 char abuf[1024], nbuf[1024], *addr = NULL, *w = NULL; 118 char Abuf[1024], pbuf[32], *name = NULL, *port = NULL; 119 char *ebuf = &sbuf[len - 1], *buf = sbuf; 120 const char *ptr, *s; 121 int p = -1; 122 const struct sockaddr_at *sat = NULL; 123 const struct sockaddr_in *sin4 = NULL; 124 const struct sockaddr_in6 *sin6 = NULL; 125 const struct sockaddr_un *sun = NULL; 126 const struct sockaddr_dl *sdl = NULL; 127 int na = 1; 128 129 #define ADDC(c) do { if (buf < ebuf) *buf++ = c; else buf++; } \ 130 while (/*CONSTCOND*/0) 131 #define ADDS(p) do { for (s = p; *s; s++) ADDC(*s); } \ 132 while (/*CONSTCOND*/0) 133 #define ADDNA() do { if (na) ADDS("N/A"); } \ 134 while (/*CONSTCOND*/0) 135 136 switch (sa->sa_family) { 137 case AF_UNSPEC: 138 goto done; 139 case AF_APPLETALK: 140 sat = ((const struct sockaddr_at *)(const void *)sa); 141 p = ntohs(sat->sat_port); 142 (void)snprintf(addr = abuf, sizeof(abuf), "%u.%u", 143 ntohs(sat->sat_addr.s_net), sat->sat_addr.s_node); 144 (void)snprintf(port = pbuf, sizeof(pbuf), "%d", p); 145 break; 146 case AF_LOCAL: 147 sun = ((const struct sockaddr_un *)(const void *)sa); 148 (void)strlcpy(addr = abuf, sun->sun_path, sizeof(abuf)); 149 break; 150 case AF_INET: 151 sin4 = ((const struct sockaddr_in *)(const void *)sa); 152 p = ntohs(sin4->sin_port); 153 a = &sin4->sin_addr; 154 break; 155 case AF_INET6: 156 sin6 = ((const struct sockaddr_in6 *)(const void *)sa); 157 p = ntohs(sin6->sin6_port); 158 a = &sin6->sin6_addr; 159 break; 160 case AF_LINK: 161 sdl = ((const struct sockaddr_dl *)(const void *)sa); 162 (void)strlcpy(addr = abuf, link_ntoa(sdl), sizeof(abuf)); 163 if ((w = strchr(addr, ':')) != 0) { 164 *w++ = '\0'; 165 addr = w; 166 } 167 break; 168 default: 169 errno = EAFNOSUPPORT; 170 return -1; 171 } 172 173 if (addr == abuf) 174 name = addr; 175 176 if (a && getnameinfo(sa, (socklen_t)sa->sa_len, addr = abuf, 177 (unsigned int)sizeof(abuf), NULL, 0, 178 NI_NUMERICHOST|NI_NUMERICSERV) != 0) 179 return -1; 180 181 for (ptr = fmt; *ptr; ptr++) { 182 if (*ptr != '%') { 183 ADDC(*ptr); 184 continue; 185 } 186 next_char: 187 switch (*++ptr) { 188 case '?': 189 na = 0; 190 goto next_char; 191 case 'a': 192 ADDS(addr); 193 break; 194 case 'p': 195 if (p != -1) { 196 (void)snprintf(nbuf, sizeof(nbuf), "%d", p); 197 ADDS(nbuf); 198 } else 199 ADDNA(); 200 break; 201 case 'f': 202 (void)snprintf(nbuf, sizeof(nbuf), "%d", sa->sa_family); 203 ADDS(nbuf); 204 break; 205 case 'l': 206 (void)snprintf(nbuf, sizeof(nbuf), "%d", sa->sa_len); 207 ADDS(nbuf); 208 break; 209 case 'A': 210 if (name) 211 ADDS(name); 212 else if (!a) 213 ADDNA(); 214 else { 215 getnameinfo(sa, (socklen_t)sa->sa_len, 216 name = Abuf, 217 (unsigned int)sizeof(nbuf), NULL, 0, 0); 218 ADDS(name); 219 } 220 break; 221 case 'P': 222 if (port) 223 ADDS(port); 224 else if (p == -1) 225 ADDNA(); 226 else { 227 getnameinfo(sa, (socklen_t)sa->sa_len, NULL, 0, 228 port = pbuf, 229 (unsigned int)sizeof(pbuf), 0); 230 ADDS(port); 231 } 232 break; 233 case 'I': 234 if (sdl && addr != abuf) { 235 ADDS(abuf); 236 } else { 237 ADDNA(); 238 } 239 break; 240 case 'F': 241 if (sin6) { 242 (void)snprintf(nbuf, sizeof(nbuf), "%d", 243 sin6->sin6_flowinfo); 244 ADDS(nbuf); 245 break; 246 } else { 247 ADDNA(); 248 } 249 break; 250 case 'S': 251 if (sin6) { 252 (void)snprintf(nbuf, sizeof(nbuf), "%d", 253 sin6->sin6_scope_id); 254 ADDS(nbuf); 255 break; 256 } else { 257 ADDNA(); 258 } 259 break; 260 case 'R': 261 if (sat) { 262 const struct netrange *n = 263 &sat->sat_range.r_netrange; 264 (void)snprintf(nbuf, sizeof(nbuf), 265 "%d:[%d,%d]", n->nr_phase , n->nr_firstnet, 266 n->nr_lastnet); 267 ADDS(nbuf); 268 } else { 269 ADDNA(); 270 } 271 break; 272 case 'D': 273 switch (sa->sa_family) { 274 case AF_APPLETALK: 275 debug_at(nbuf, sizeof(nbuf), sat); 276 break; 277 case AF_LOCAL: 278 debug_un(nbuf, sizeof(nbuf), sun); 279 break; 280 case AF_INET: 281 debug_in(nbuf, sizeof(nbuf), sin4); 282 break; 283 case AF_INET6: 284 debug_in6(nbuf, sizeof(nbuf), sin6); 285 break; 286 case AF_LINK: 287 debug_dl(nbuf, sizeof(nbuf), sdl); 288 break; 289 default: 290 abort(); 291 } 292 ADDS(nbuf); 293 break; 294 default: 295 ADDC('%'); 296 if (na == 0) 297 ADDC('?'); 298 if (*ptr == '\0') 299 goto done; 300 /*FALLTHROUGH*/ 301 case '%': 302 ADDC(*ptr); 303 break; 304 } 305 na = 1; 306 } 307 done: 308 if (buf < ebuf) 309 *buf = '\0'; 310 else if (len != 0) 311 sbuf[len - 1] = '\0'; 312 return (int)(buf - sbuf); 313 } 314
Indexes created Tue Sep 23 22:09:46 GMT 2025