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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:46:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:46:30 +0000
commitb5896ba9f6047e7031e2bdee0622d543e11a6734 (patch)
treefd7b460593a2fee1be579bec5697e6d887ea3421 /src/util/find_inet.c
parentInitial commit. (diff)
downloadpostfix-b5896ba9f6047e7031e2bdee0622d543e11a6734.tar.xz
postfix-b5896ba9f6047e7031e2bdee0622d543e11a6734.zip
Adding upstream version 3.4.23.upstream/3.4.23upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/util/find_inet.c')
-rw-r--r--src/util/find_inet.c96
1 files changed, 96 insertions, 0 deletions
diff --git a/src/util/find_inet.c b/src/util/find_inet.c
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+/*++
+/* NAME
+/* find_inet 3
+/* SUMMARY
+/* inet-domain name services
+/* SYNOPSIS
+/* #include <find_inet.h>
+/*
+/* unsigned find_inet_addr(host)
+/* const char *host;
+/*
+/* int find_inet_port(port, proto)
+/* const char *port;
+/* const char *proto;
+/* DESCRIPTION
+/* These functions translate network address information from
+/* between printable form to the internal the form used by the
+/* BSD TCP/IP network software.
+/*
+/* find_inet_addr() translates a symbolic or numerical hostname.
+/* This function is deprecated. Use hostname_to_hostaddr() instead.
+/*
+/* find_inet_port() translates a symbolic or numerical port name.
+/* BUGS
+/* find_inet_addr() ignores all but the first address listed for
+/* a symbolic hostname.
+/* DIAGNOSTICS
+/* Lookup and conversion errors are fatal.
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*--*/
+
+/* System libraries. */
+
+#include <sys_defs.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* Application-specific. */
+
+#include "msg.h"
+#include "stringops.h"
+#include "find_inet.h"
+
+#ifndef INADDR_NONE
+#define INADDR_NONE 0xffffffff
+#endif
+
+/* find_inet_addr - translate numerical or symbolic host name */
+
+unsigned find_inet_addr(const char *host)
+{
+ struct in_addr addr;
+ struct hostent *hp;
+
+ addr.s_addr = inet_addr(host);
+ if ((addr.s_addr == INADDR_NONE) || (addr.s_addr == 0)) {
+ if ((hp = gethostbyname(host)) == 0)
+ msg_fatal("host not found: %s", host);
+ if (hp->h_addrtype != AF_INET)
+ msg_fatal("unexpected address family: %d", hp->h_addrtype);
+ if (hp->h_length != sizeof(addr))
+ msg_fatal("unexpected address length %d", hp->h_length);
+ memcpy((void *) &addr, hp->h_addr, hp->h_length);
+ }
+ return (addr.s_addr);
+}
+
+/* find_inet_port - translate numerical or symbolic service name */
+
+int find_inet_port(const char *service, const char *protocol)
+{
+ struct servent *sp;
+ int port;
+
+ if (alldig(service) && (port = atoi(service)) != 0) {
+ if (port < 0 || port > 65535)
+ msg_fatal("bad port number: %s", service);
+ return (htons(port));
+ } else {
+ if ((sp = getservbyname(service, protocol)) == 0)
+ msg_fatal("unknown service: %s/%s", service, protocol);
+ return (sp->s_port);
+ }
+}