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Location: cpp/openttd-patchpack/source/src/3rdparty/os2/getnameinfo.c
r25382:935b8bc1e454
11.1 KiB
text/x-c
Cleanup: [Fluidsynth] Comply better with the coding style
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 | /*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Issues to be discussed:
* - RFC2553 says that we should raise error on short buffer. X/Open says
* we need to truncate the result. We obey RFC2553 (and X/Open should be
* modified). ipngwg rough consensus seems to follow RFC2553. RFC3493 says
* nothing about it, but defines a new error code EAI_OVERFLOW which seems
* to be intended the code for this case.
* - What is "local" in NI_NOFQDN? (see comments in the code)
* - NI_NAMEREQD and NI_NUMERICHOST conflict with each other.
* - (KAME extension) always attach textual scopeid (fe80::1%lo0), if
* sin6_scope_id is filled - standardization status?
* - what should we do if we should do getservbyport("sctp")?
*/
/*
* Considerations about thread-safeness
* The code in this file is thread-safe, and so the thread-safeness of
* getnameinfo() depends on the property of backend functions.
* - getservbyport() is not thread safe for most systems we are targeting.
* - getipnodebyaddr() is thread safe. However, many resolver libraries
* used in the function are not thread safe.
* - gethostbyaddr() is usually not thread safe.
*/
#if !HAVE_GETNAMEINFO
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <netdb.h>
#include <resolv.h>
#include <string.h>
#include <stddef.h>
#include <errno.h>
#include <inttypes.h>
#include "getaddrinfo.h"
#include "getnameinfo.h"
static const struct afd {
int a_af;
int a_addrlen;
int a_socklen;
int a_off;
int a_portoff;
} afdl [] = {
#if INET6
{PF_INET6, sizeof(struct in6_addr), sizeof(struct sockaddr_in6),
offsetof(struct sockaddr_in6, sin6_addr),
offsetof(struct sockaddr_in6, sin6_port)},
#endif
{PF_INET, sizeof(struct in_addr), sizeof(struct sockaddr_in),
offsetof(struct sockaddr_in, sin_addr),
offsetof(struct sockaddr_in, sin_port)},
{0, 0, 0, 0, 0},
};
#if INET6
static int ip6_parsenumeric __P((const struct sockaddr *, const char *, char *,
size_t, int));
static int ip6_sa2str __P((const struct sockaddr_in6 *, char *, size_t, int));
#endif
int
getnameinfo(sa, salen, host, hostlen, serv, servlen, flags)
const struct sockaddr *sa;
socklen_t salen;
char *host;
size_t hostlen;
char *serv;
size_t servlen;
int flags;
{
const struct afd *afd;
struct servent *sp;
struct hostent *hp;
unsigned short port;
int family, i;
const char *addr;
uint32_t v4a;
char numserv[512];
if (sa == NULL)
return EAI_FAIL;
#if HAVE_SA_LEN /*XXX*/
if (sa->sa_len != salen)
return EAI_FAIL;
#endif
family = sa->sa_family;
for (i = 0; afdl[i].a_af; i++)
if (afdl[i].a_af == family) {
afd = &afdl[i];
goto found;
}
return EAI_FAMILY;
found:
if (salen != afd->a_socklen)
return EAI_FAIL;
/* network byte order */
memcpy(&port, (const char *)sa + afd->a_portoff, sizeof(port));
addr = (const char *)sa + afd->a_off;
if (serv == NULL || servlen == 0) {
/*
* do nothing in this case.
* in case you are wondering if "&&" is more correct than
* "||" here: RFC3493 says that serv == NULL OR servlen == 0
* means that the caller does not want the result.
*/
} else {
if (flags & NI_NUMERICSERV)
sp = NULL;
else {
sp = getservbyport(port,
(flags & NI_DGRAM) ? "udp" : "tcp");
}
if (sp) {
if (strlen(sp->s_name) + 1 > servlen)
return EAI_OVERFLOW;
strncpy(serv, sp->s_name, servlen);
} else {
snprintf(numserv, sizeof(numserv), "%u", ntohs(port));
if (strlen(numserv) + 1 > servlen)
return EAI_OVERFLOW;
strncpy(serv, numserv, servlen);
}
}
switch (sa->sa_family) {
case AF_INET:
v4a = (uint32_t)
ntohl(((const struct sockaddr_in *)sa)->sin_addr.s_addr);
if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a))
flags |= NI_NUMERICHOST;
v4a >>= IN_CLASSA_NSHIFT;
if (v4a == 0)
flags |= NI_NUMERICHOST;
break;
#if INET6
case AF_INET6: {
const struct sockaddr_in6 *sin6;
sin6 = (const struct sockaddr_in6 *)sa;
switch (sin6->sin6_addr.s6_addr[0]) {
case 0x00:
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
;
else if (IN6_IS_ADDR_LOOPBACK(&sin6->sin6_addr))
;
else
flags |= NI_NUMERICHOST;
break;
default:
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
flags |= NI_NUMERICHOST;
else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
flags |= NI_NUMERICHOST;
break;
}
}
break;
#endif
}
if (host == NULL || hostlen == 0) {
/*
* do nothing in this case.
* in case you are wondering if "&&" is more correct than
* "||" here: RFC3493 says that host == NULL or hostlen == 0
* means that the caller does not want the result.
*/
} else if (flags & NI_NUMERICHOST) {
/* NUMERICHOST and NAMEREQD conflicts with each other */
if (flags & NI_NAMEREQD)
return EAI_NONAME;
goto numeric;
} else {
#if USE_GETIPNODEBY
int h_error = 0;
hp = getipnodebyaddr(addr, afd->a_addrlen, afd->a_af, &h_error);
#else
hp = gethostbyaddr(addr, afd->a_addrlen, afd->a_af);
#if 0 // getnameinfo.c:161:9: error: variable 'h_error' set but not used
#if HAVE_H_ERRNO
h_error = h_errno;
#else
h_error = EINVAL;
#endif
#endif /* 0 */
#endif
if (hp) {
#if 0
if (flags & NI_NOFQDN) {
/*
* According to RFC3493 section 6.2, NI_NOFQDN
* means "node name portion of the FQDN shall
* be returned for local hosts." The following
* code tries to implement it by returning the
* first label (the part before the first
* period) of the FQDN. However, it is not
* clear if this always makes sense, since the
* given address may be outside of "local
* hosts." Due to the unclear description, we
* disable the code in this implementation.
*/
char *p;
p = strchr(hp->h_name, '.');
if (p)
*p = '\0';
}
#endif
if (strlen(hp->h_name) + 1 > hostlen) {
#if USE_GETIPNODEBY
freehostent(hp);
#endif
return EAI_OVERFLOW;
}
strncpy(host, hp->h_name, hostlen);
#if USE_GETIPNODEBY
freehostent(hp);
#endif
} else {
if (flags & NI_NAMEREQD)
return EAI_NONAME;
numeric:
switch (afd->a_af) {
#if INET6
case AF_INET6: {
int error;
if ((error = ip6_parsenumeric(sa, addr, host,
hostlen,
flags)) != 0)
return(error);
break;
}
#endif
default:
if (inet_ntop(afd->a_af, addr, host,
hostlen) == NULL)
return EAI_SYSTEM;
break;
}
}
}
return(0);
}
#if INET6
static int
ip6_parsenumeric(sa, addr, host, hostlen, flags)
const struct sockaddr *sa;
const char *addr;
char *host;
size_t hostlen;
int flags;
{
int numaddrlen;
char numaddr[512];
if (inet_ntop(AF_INET6, addr, numaddr, sizeof(numaddr)) == NULL)
return EAI_SYSTEM;
numaddrlen = strlen(numaddr);
if (numaddrlen + 1 > hostlen) /* don't forget terminator */
return EAI_OVERFLOW;
strncpy(host, numaddr, hostlen);
if (((const struct sockaddr_in6 *)sa)->sin6_scope_id) {
char zonebuf[SQUIDHOSTNAMELEN];
int zonelen;
zonelen = ip6_sa2str(
(const struct sockaddr_in6 *)(const void *)sa,
zonebuf, sizeof(zonebuf), flags);
if (zonelen < 0)
return EAI_OVERFLOW;
if (zonelen + 1 + numaddrlen + 1 > hostlen)
return EAI_OVERFLOW;
/* construct <numeric-addr><delim><zoneid> */
memcpy(host + numaddrlen + 1, zonebuf,
(size_t)zonelen);
host[numaddrlen] = SCOPE_DELIMITER;
host[numaddrlen + 1 + zonelen] = '\0';
}
return 0;
}
/* ARGSUSED */
static int
ip6_sa2str(sa6, buf, bufsiz, flags)
const struct sockaddr_in6 *sa6;
char *buf;
size_t bufsiz;
int flags;
{
unsigned int ifindex;
const struct in6_addr *a6;
int n;
ifindex = (unsigned int)sa6->sin6_scope_id;
a6 = &sa6->sin6_addr;
#if NI_NUMERICSCOPE
if ((flags & NI_NUMERICSCOPE) != 0) {
n = snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id);
if (n < 0 || n >= bufsiz)
return -1;
else
return n;
}
#endif
/* if_indextoname() does not take buffer size. not a good api... */
if ((IN6_IS_ADDR_LINKLOCAL(a6) || IN6_IS_ADDR_MC_LINKLOCAL(a6) ||
IN6_IS_ADDR_MC_NODELOCAL(a6)) && bufsiz >= IF_NAMESIZE) {
char *p = if_indextoname(ifindex, buf);
if (p)
return (strlen(p));
}
/* last resort */
n = snprintf(buf, bufsiz, "%u", sa6->sin6_scope_id);
if (n < 0 || n >= bufsiz)
return -1;
else
return n;
}
#endif /* INET6 */
#endif
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