comparison usr/src/cmd/cmd-inet/usr.lib/mdnsd/PlatformCommon.c @ 0:c9caec207d52 b86

Initial porting based on b86
author Koji Uno <koji.uno@sun.com>
date Tue, 02 Jun 2009 18:56:50 +0900
parents
children 1a15d5aaf794
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equal deleted inserted replaced
-1:000000000000 0:c9caec207d52
1 /* -*- Mode: C; tab-width: 4 -*-
2 *
3 * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16
17 Change History (most recent first):
18
19 $Log: PlatformCommon.c,v $
20 Revision 1.7 2006/08/14 23:24:56 cheshire
21 Re-licensed mDNSResponder daemon source code under Apache License, Version 2.0
22
23 Revision 1.6 2005/04/08 21:30:16 ksekar
24 <rdar://problem/4007457> Compiling problems with mDNSResponder-98 on Solaris/Sparc v9
25 Patch submitted by Bernd Kuhls
26
27 Revision 1.5 2005/02/01 19:33:30 ksekar
28 <rdar://problem/3985239> Keychain format too restrictive
29
30 Revision 1.4 2005/01/19 19:19:21 ksekar
31 <rdar://problem/3960191> Need a way to turn off domain discovery
32
33 Revision 1.3 2004/12/13 17:46:52 cheshire
34 Use sizeof(buf) instead of fixed constant 1024
35
36 Revision 1.2 2004/12/01 03:30:29 cheshire
37 <rdar://problem/3889346> Add Unicast DNS support to mDNSPosix
38
39 Revision 1.1 2004/12/01 01:51:35 cheshire
40 Move ReadDDNSSettingsFromConfFile() from mDNSMacOSX.c to PlatformCommon.c
41
42 */
43
44 #pragma ident "@(#)PlatformCommon.c 1.1 07/08/13 SMI"
45
46 #include <stdio.h> // Needed for fopen() etc.
47 #include <unistd.h> // Needed for close()
48 #include <string.h> // Needed for strlen() etc.
49 #include <errno.h> // Needed for errno etc.
50 #include <sys/socket.h> // Needed for socket() etc.
51 #include <netinet/in.h> // Needed for sockaddr_in
52
53 #include "mDNSEmbeddedAPI.h" // Defines the interface provided to the client layer above
54 #include "PlatformCommon.h"
55
56 #ifdef NOT_HAVE_SOCKLEN_T
57 typedef unsigned int socklen_t;
58 #endif
59
60 // Bind a UDP socket to a global destination to find the default route's interface address
61 mDNSexport void FindDefaultRouteIP(mDNSAddr *a)
62 {
63 struct sockaddr_in addr;
64 socklen_t len = sizeof(addr);
65 int sock = socket(AF_INET,SOCK_DGRAM,0);
66 a->type = mDNSAddrType_None;
67 if (sock == -1) return;
68 addr.sin_family = AF_INET;
69 addr.sin_port = 1; // Not important, any port and public address will do
70 addr.sin_addr.s_addr = 0x11111111;
71 if ((connect(sock,(const struct sockaddr*)&addr,sizeof(addr))) == -1) { close(sock); return; }
72 if ((getsockname(sock,(struct sockaddr*)&addr, &len)) == -1) { close(sock); return; }
73 close(sock);
74 a->type = mDNSAddrType_IPv4;
75 a->ip.v4.NotAnInteger = addr.sin_addr.s_addr;
76 }
77
78 // dst must be at least MAX_ESCAPED_DOMAIN_NAME bytes, and option must be less than 32 bytes in length
79 mDNSlocal mDNSBool GetConfigOption(char *dst, const char *option, FILE *f)
80 {
81 char buf[32+1+MAX_ESCAPED_DOMAIN_NAME]; // Option name, one space, option value
82 unsigned int len = strlen(option);
83 if (len + 1 + MAX_ESCAPED_DOMAIN_NAME > sizeof(buf)-1) { LogMsg("GetConfigOption: option %s too long", option); return mDNSfalse; }
84 fseek(f, 0, SEEK_SET); // set position to beginning of stream
85 while (fgets(buf, sizeof(buf), f)) // Read at most sizeof(buf)-1 bytes from file, and append '\0' C-string terminator
86 {
87 if (!strncmp(buf, option, len))
88 {
89 strncpy(dst, buf + len + 1, MAX_ESCAPED_DOMAIN_NAME-1);
90 if (dst[MAX_ESCAPED_DOMAIN_NAME-1]) dst[MAX_ESCAPED_DOMAIN_NAME-1] = '\0';
91 len = strlen(dst);
92 if (len && dst[len-1] == '\n') dst[len-1] = '\0'; // chop newline
93 return mDNStrue;
94 }
95 }
96 debugf("Option %s not set", option);
97 return mDNSfalse;
98 }
99
100 mDNSexport void ReadDDNSSettingsFromConfFile(mDNS *const m, const char *const filename, domainname *const hostname, domainname *const domain, mDNSBool *DomainDiscoveryDisabled)
101 {
102 char buf [MAX_ESCAPED_DOMAIN_NAME];
103 char secret[MAX_ESCAPED_DOMAIN_NAME] = "";
104 mStatus err;
105 FILE *f = fopen(filename, "r");
106
107 if (hostname) hostname->c[0] = 0;
108 if (domain) domain->c[0] = 0;
109 if (DomainDiscoveryDisabled) *DomainDiscoveryDisabled = mDNSfalse;
110
111 if (f)
112 {
113 if (DomainDiscoveryDisabled && GetConfigOption(buf, "DomainDiscoveryDisabled", f) && !strcasecmp(buf, "true")) *DomainDiscoveryDisabled = mDNStrue;
114 if (hostname && GetConfigOption(buf, "hostname", f) && !MakeDomainNameFromDNSNameString(hostname, buf)) goto badf;
115 if (domain && GetConfigOption(buf, "zone", f) && !MakeDomainNameFromDNSNameString(domain, buf)) goto badf;
116 GetConfigOption(secret, "secret-64", f); // failure means no authentication
117 fclose(f);
118 f = NULL;
119 }
120 else
121 {
122 if (errno != ENOENT) LogMsg("ERROR: Config file exists, but cannot be opened.");
123 return;
124 }
125
126 if (domain && domain->c[0] && secret[0])
127 {
128 // for now we assume keyname = service reg domain and we use same key for service and hostname registration
129 err = mDNS_SetSecretForZone(m, domain, domain, secret);
130 if (err) LogMsg("ERROR: mDNS_SetSecretForZone returned %d for domain %##s", err, domain->c);
131 }
132
133 return;
134
135 badf:
136 LogMsg("ERROR: malformatted config file");
137 if (f) fclose(f);
138 }