sockaddr_snprintf.c revision 1.6
1 /* $NetBSD: sockaddr_snprintf.c,v 1.6 2005/08/27 17:01:49 elad 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 #include <sys/cdefs.h> 39 #if defined(LIBC_SCCS) && !defined(lint) 40 __RCSID("$NetBSD: sockaddr_snprintf.c,v 1.6 2005/08/27 17:01:49 elad Exp $"); 41 #endif /* LIBC_SCCS and not lint */ 42 43 #include <sys/types.h> 44 #include <sys/socket.h> 45 #include <sys/un.h> 46 47 #include <netinet/in.h> 48 #include <netatalk/at.h> 49 #include <net/if_dl.h> 50 51 #include <stdio.h> 52 #include <string.h> 53 #include <errno.h> 54 #include <util.h> 55 #include <netdb.h> 56 57 int 58 sockaddr_snprintf(char *buf, size_t len, const char *fmt, 59 const struct sockaddr *sa) 60 { 61 const void *a = NULL; 62 char abuf[1024], nbuf[1024], *addr = NULL, *w = NULL; 63 char Abuf[1024], pbuf[32], *name = NULL, *port = NULL; 64 char *ebuf = &buf[len - 1], *sbuf = buf; 65 const char *ptr, *s; 66 int p = -1; 67 const struct sockaddr_at *sat = NULL; 68 const struct sockaddr_in *sin4 = NULL; 69 const struct sockaddr_in6 *sin6 = NULL; 70 const struct sockaddr_un *sun = NULL; 71 const struct sockaddr_dl *sdl = NULL; 72 int na = 1; 73 74 #define ADDC(c) do { if (buf < ebuf) *buf++ = c; else buf++; } \ 75 while (/*CONSTCOND*/0) 76 #define ADDN() do { if (buf < ebuf) *buf = '\0'; else buf[len - 1] = '\0'; } \ 77 while (/*CONSTCOND*/0) 78 #define ADDS(p) do { for (s = p; *s; s++) ADDC(*s); } \ 79 while (/*CONSTCOND*/0) 80 #define ADDNA() do { if (na) ADDS("N/A"); } \ 81 while (/*CONSTCOND*/0) 82 83 switch (sa->sa_family) { 84 case AF_UNSPEC: 85 goto done; 86 case AF_APPLETALK: 87 sat = ((const struct sockaddr_at *)(const void *)sa); 88 p = ntohs(sat->sat_port); 89 (void)snprintf(addr = abuf, sizeof(abuf), "%u.%u", 90 ntohs(sat->sat_addr.s_net), sat->sat_addr.s_node); 91 (void)snprintf(port = pbuf, sizeof(pbuf), "%d", p); 92 break; 93 case AF_LOCAL: 94 sun = ((const struct sockaddr_un *)(const void *)sa); 95 (void)strlcpy(addr = abuf, sun->sun_path, SUN_LEN(sun)); 96 break; 97 case AF_INET: 98 sin4 = ((const struct sockaddr_in *)(const void *)sa); 99 p = ntohs(sin4->sin_port); 100 a = &sin4->sin_addr; 101 break; 102 case AF_INET6: 103 sin6 = ((const struct sockaddr_in6 *)(const void *)sa); 104 p = ntohs(sin6->sin6_port); 105 a = &sin6->sin6_addr; 106 break; 107 case AF_LINK: 108 sdl = ((const struct sockaddr_dl *)(const void *)sa); 109 (void)strlcpy(addr = abuf, link_ntoa(sdl), sizeof(abuf)); 110 if ((w = strchr(addr, ':')) != 0) { 111 *w++ = '\0'; 112 addr = w; 113 } 114 break; 115 default: 116 errno = EAFNOSUPPORT; 117 return -1; 118 } 119 120 if (addr == abuf) 121 name = addr; 122 123 if (a && getnameinfo(sa, (socklen_t)sa->sa_len, addr = abuf, 124 (unsigned int)sizeof(abuf), NULL, 0, 125 NI_NUMERICHOST|NI_NUMERICSERV) != 0) 126 return -1; 127 128 for (ptr = fmt; *ptr; ptr++) { 129 if (*ptr != '%') { 130 ADDC(*ptr); 131 continue; 132 } 133 next_char: 134 switch (*++ptr) { 135 case '?': 136 na = 0; 137 goto next_char; 138 case 'a': 139 ADDS(addr); 140 break; 141 case 'p': 142 if (p != -1) { 143 (void)snprintf(nbuf, sizeof(nbuf), "%d", p); 144 ADDS(nbuf); 145 } else 146 ADDNA(); 147 break; 148 case 'f': 149 (void)snprintf(nbuf, sizeof(nbuf), "%d", sa->sa_family); 150 ADDS(nbuf); 151 break; 152 case 'l': 153 (void)snprintf(nbuf, sizeof(nbuf), "%d", sa->sa_len); 154 ADDS(nbuf); 155 break; 156 case 'A': 157 if (name) 158 ADDS(name); 159 else if (!a) 160 ADDNA(); 161 else { 162 getnameinfo(sa, (socklen_t)sa->sa_len, 163 name = Abuf, 164 (unsigned int)sizeof(nbuf), NULL, 0, 0); 165 ADDS(name); 166 } 167 break; 168 case 'P': 169 if (port) 170 ADDS(port); 171 else if (p == -1) 172 ADDNA(); 173 else { 174 getnameinfo(sa, (socklen_t)sa->sa_len, NULL, 0, 175 port = pbuf, 176 (unsigned int)sizeof(pbuf), 0); 177 ADDS(port); 178 } 179 break; 180 case 'I': 181 if (sdl && addr != abuf) { 182 ADDS(abuf); 183 } else { 184 ADDNA(); 185 } 186 break; 187 case 'F': 188 if (sin6) { 189 (void)snprintf(nbuf, sizeof(nbuf), "%d", 190 sin6->sin6_flowinfo); 191 ADDS(nbuf); 192 break; 193 } else { 194 ADDNA(); 195 } 196 break; 197 case 'S': 198 if (sin6) { 199 (void)snprintf(nbuf, sizeof(nbuf), "%d", 200 sin6->sin6_scope_id); 201 ADDS(nbuf); 202 break; 203 } else { 204 ADDNA(); 205 } 206 break; 207 case 'R': 208 if (sat) { 209 const struct netrange *n = 210 &sat->sat_range.r_netrange; 211 (void)snprintf(nbuf, sizeof(nbuf), 212 "%d:[%d,%d]", n->nr_phase , n->nr_firstnet, 213 n->nr_lastnet); 214 ADDS(nbuf); 215 } else { 216 ADDNA(); 217 } 218 break; 219 default: 220 ADDC('%'); 221 if (na == 0) 222 ADDC('?'); 223 if (*ptr == '\0') 224 goto done; 225 ADDC(*ptr); 226 break; 227 } 228 na = 1; 229 } 230 done: 231 ADDN(); 232 return (int)(buf - sbuf); 233 } 234
Indexes created Tue Sep 23 14:10:03 GMT 2025