sockaddr_snprintf.c revision 1.3
1 /* $NetBSD: sockaddr_snprintf.c,v 1.3 2004/12/11 06:41:16 christos 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 1.3 2004/12/11 06:41:16 christos 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, *w; 63 char *ebuf = &buf[len - 1], *sbuf = buf; 64 const char *ptr, *s; 65 in_port_t p = (in_port_t)~0; 66 const struct sockaddr_at *sat = NULL; 67 const struct sockaddr_in *sin4 = NULL; 68 const struct sockaddr_in6 *sin6 = NULL; 69 const struct sockaddr_un *sun = NULL; 70 const struct sockaddr_dl *sdl = NULL; 71 72 #define ADDC(c) if (buf < ebuf) *buf++ = c; else buf++ 73 #define ADDN() if (buf < ebuf) *buf++ = '\0'; else buf[len - 1] = '\0' 74 #define ADDS(p) for (s = p; *s; s++) ADDC(*s) 75 #define ADDNA() ADDS("N/A") 76 77 switch (sa->sa_family) { 78 case AF_UNSPEC: 79 goto done; 80 case AF_APPLETALK: 81 sat = ((const struct sockaddr_at *)(const void *)sa); 82 p = ntohs(sat->sat_port); 83 (void)snprintf(addr = abuf, sizeof(abuf), "%u.%u", 84 ntohs(sat->sat_addr.s_net), sat->sat_addr.s_node); 85 break; 86 case AF_LOCAL: 87 sun = ((const struct sockaddr_un *)(const void *)sa); 88 (void)strlcpy(addr = abuf, sun->sun_path, SUN_LEN(sun)); 89 break; 90 case AF_INET: 91 sin4 = ((const struct sockaddr_in *)(const void *)sa); 92 p = ntohs(sin4->sin_port); 93 a = &sin4->sin_addr; 94 break; 95 case AF_INET6: 96 sin6 = ((const struct sockaddr_in6 *)(const void *)sa); 97 p = ntohs(sin6->sin6_port); 98 a = &sin6->sin6_addr; 99 break; 100 case AF_LINK: 101 sdl = ((const struct sockaddr_dl *)(const void *)sa); 102 (void)strlcpy(addr = abuf, link_ntoa(sdl), sizeof(abuf)); 103 if ((w = strchr(addr, ':')) != 0) { 104 *w++ = '\0'; 105 addr = w; 106 107 } 108 break; 109 default: 110 errno = EAFNOSUPPORT; 111 return -1; 112 } 113 114 if (a && getnameinfo(sa, (socklen_t)sa->sa_len, addr = abuf, 115 sizeof(abuf), NULL, 0, NI_NUMERICHOST|NI_NUMERICSERV) != 0) 116 return -1; 117 118 for (ptr = fmt; *ptr; ptr++) { 119 if (*ptr != '%') { 120 ADDC(*ptr); 121 continue; 122 } 123 switch (*++ptr) { 124 case '\0': 125 ADDC('%'); 126 goto done; 127 case 'a': 128 ADDS(addr); 129 break; 130 case 'p': 131 if (p != (in_port_t)~0) { 132 (void)snprintf(nbuf, sizeof(nbuf), "%d", p); 133 ADDS(nbuf); 134 } else { 135 ADDNA(); 136 } 137 break; 138 case 'f': 139 (void)snprintf(nbuf, sizeof(nbuf), "%d", sa->sa_family); 140 ADDS(nbuf); 141 break; 142 case 'l': 143 (void)snprintf(nbuf, sizeof(nbuf), "%d", sa->sa_len); 144 ADDS(nbuf); 145 break; 146 case 'I': 147 if (sdl && addr != abuf) { 148 ADDS(abuf); 149 } else { 150 ADDNA(); 151 } 152 break; 153 case 'F': 154 if (sin6) { 155 (void)snprintf(nbuf, sizeof(nbuf), "%d", 156 sin6->sin6_flowinfo); 157 ADDS(nbuf); 158 break; 159 } else { 160 ADDNA(); 161 } 162 break; 163 case 'S': 164 if (sin6) { 165 (void)snprintf(nbuf, sizeof(nbuf), "%d", 166 sin6->sin6_scope_id); 167 ADDS(nbuf); 168 break; 169 } else { 170 ADDNA(); 171 } 172 break; 173 case 'R': 174 if (sat) { 175 const struct netrange *n = 176 &sat->sat_range.r_netrange; 177 (void)snprintf(nbuf, sizeof(nbuf), 178 "%d:[%d,%d]", n->nr_phase , n->nr_firstnet, 179 n->nr_lastnet); 180 ADDS(nbuf); 181 } else { 182 ADDNA(); 183 } 184 break; 185 default: 186 ADDC('%'); 187 ADDC(*ptr); 188 break; 189 } 190 } 191 done: 192 ADDN(); 193 return buf - sbuf; 194 } 195
Indexes created Wed Sep 24 05:09:52 GMT 2025