cbe3fb5c60
Change the copyright header of assorted source files in libs/libc to the ASF version. I was listed as the author in these files. I did also check the heritage of those files and besides me they have only been changed by the following people, all of whom did sign a CLA to the best of my knowledge: Alin Jerpelea Haitao Liu Gregory Nutt Yamamoto Takashi Xiang Xiao Signed-off-by: Michael Jung <mijung@gmx.net>
201 lines
5.2 KiB
C
201 lines
5.2 KiB
C
/****************************************************************************
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* libc/netdb/lib_getnameinfo.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <netdb.h>
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include <arpa/inet.h>
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#include <assert.h>
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#include "netdb/lib_netdb.h"
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#ifdef CONFIG_LIBC_NETDB
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: getnameinfo
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****************************************************************************/
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int getnameinfo(FAR const struct sockaddr *addr, socklen_t addrlen,
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FAR char *host, socklen_t hostlen,
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FAR char *serv, socklen_t servlen, int flags)
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{
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FAR const void *saddr;
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socklen_t saddr_len;
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int port;
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int ret;
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if (addr && addr->sa_family == AF_INET &&
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addrlen == sizeof(struct sockaddr_in))
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{
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FAR const struct sockaddr_in *sa_in;
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sa_in = (FAR const struct sockaddr_in *)addr;
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port = ntohs(sa_in->sin_port);
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saddr = &sa_in->sin_addr;
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saddr_len = sizeof(sa_in->sin_addr);
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}
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#ifdef CONFIG_NET_IPv6
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else if (addr && addr->sa_family == AF_INET6 &&
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addrlen == sizeof(struct sockaddr_in6))
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{
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FAR const struct sockaddr_in6 *sa_in6;
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sa_in6 = (FAR const struct sockaddr_in6 *)addr;
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port = ntohs(sa_in6->sin6_port);
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saddr = &sa_in6->sin6_addr;
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saddr_len = sizeof(sa_in6->sin6_addr);
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}
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#endif
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else
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{
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return EAI_FAMILY;
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}
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if (host && !(flags & NI_NUMERICHOST))
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{
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struct hostent hostent;
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FAR struct hostent *res;
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int error;
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ret = gethostbyaddr_r(saddr, saddr_len, addr->sa_family, &hostent,
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host, hostlen, &res, &error);
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if (ret == OK)
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{
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size_t sz = strlen(res->h_name) + 1;
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if (sz <= hostlen)
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{
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memmove(host, res->h_name, sz);
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}
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else
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{
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memmove(host, res->h_name, hostlen);
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host[hostlen - 1] = '\0';
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}
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}
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else
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{
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switch (error)
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{
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case HOST_NOT_FOUND:
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{
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if (flags & NI_NAMEREQD)
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{
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return EAI_NONAME;
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}
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}
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break;
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case NO_RECOVERY:
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{
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if (flags & NI_NAMEREQD)
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{
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return EAI_FAIL;
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}
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}
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break;
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case NO_DATA:
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case TRY_AGAIN:
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{
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if (flags & NI_NAMEREQD)
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{
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return EAI_AGAIN;
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}
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}
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break;
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default:
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DEBUGASSERT(0);
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}
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/* Fall-back to numeric for the host name. */
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flags |= NI_NUMERICHOST;
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}
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}
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if (host && (flags & NI_NUMERICHOST))
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{
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if (!inet_ntop(addr->sa_family, saddr, host, hostlen))
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{
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switch (get_errno())
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{
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case ENOSPC:
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return EAI_OVERFLOW;
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default:
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DEBUGASSERT(0);
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}
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}
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}
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if (serv && !(flags & NI_NUMERICSERV))
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{
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struct servent servent;
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FAR struct servent *result;
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ret = getservbyport_r(port, flags & NI_DGRAM ? "udp" : "tcp",
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&servent, serv, servlen, &result);
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if (ret == OK)
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{
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size_t sz = strlen(servent.s_name) + 1;
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if (sz <= servlen)
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{
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memmove(serv, servent.s_name, sz);
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}
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else
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{
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memmove(serv, servent.s_name, servlen);
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serv[servlen - 1] = '\0';
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}
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}
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else
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{
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/* Fall-back to numeric for the host name. */
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flags |= NI_NUMERICSERV;
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}
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}
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if (serv && (flags & NI_NUMERICSERV))
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{
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snprintf(serv, servlen, "%d", port);
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}
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return OK;
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}
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#endif /* CONFIG_LIBC_NETDB */
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