*
* Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
*
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * http://www.apache.org/licenses/LICENSE-2.0
*
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
* limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
-
- Change History (most recent first):
-
-$Log: PlatformCommon.c,v $
-Revision 1.3 2004/12/13 17:46:52 cheshire
-Use sizeof(buf) instead of fixed constant 1024
-
-Revision 1.2 2004/12/01 03:30:29 cheshire
-<rdar://problem/3889346> Add Unicast DNS support to mDNSPosix
-
-Revision 1.1 2004/12/01 01:51:35 cheshire
-Move ReadDDNSSettingsFromConfFile() from mDNSMacOSX.c to PlatformCommon.c
-
*/
-#include <stdio.h> // Needed for fopen() etc.
-#include <unistd.h> // Needed for close()
-#include <string.h> // Needed for strlen() etc.
-#include <sys/errno.h> // Needed for errno etc.
-#include <sys/socket.h> // Needed for socket() etc.
-#include <netinet/in.h> // Needed for sockaddr_in
+#include <stdio.h> // Needed for fopen() etc.
+#include <unistd.h> // Needed for close()
+#include <string.h> // Needed for strlen() etc.
+#include <errno.h> // Needed for errno etc.
+#include <sys/socket.h> // Needed for socket() etc.
+#include <netinet/in.h> // Needed for sockaddr_in
+#include <syslog.h>
-#include "mDNSEmbeddedAPI.h" // Defines the interface provided to the client layer above
+#include "mDNSEmbeddedAPI.h" // Defines the interface provided to the client layer above
+#include "DNSCommon.h"
#include "PlatformCommon.h"
#ifdef NOT_HAVE_SOCKLEN_T
- typedef unsigned int socklen_t;
+typedef unsigned int socklen_t;
#endif
-// Bind a UDP socket to a global destination to find the default route's interface address
-mDNSexport void FindDefaultRouteIP(mDNSAddr *a)
- {
- struct sockaddr_in addr;
- socklen_t len = sizeof(addr);
- int sock = socket(AF_INET,SOCK_DGRAM,0);
- a->type = mDNSAddrType_None;
- if (sock == -1) return;
- addr.sin_family = AF_INET;
- addr.sin_port = 1; // Not important, any port and public address will do
- addr.sin_addr.s_addr = 0x11111111;
- if ((connect(sock,(const struct sockaddr*)&addr,sizeof(addr))) == -1) { close(sock); return; }
- if ((getsockname(sock,(struct sockaddr*)&addr, &len)) == -1) { close(sock); return; }
- close(sock);
- a->type = mDNSAddrType_IPv4;
- a->ip.v4.NotAnInteger = addr.sin_addr.s_addr;
- }
-
-// dst must be at least MAX_ESCAPED_DOMAIN_NAME bytes, and option must be less than 20 bytes in length
+// Bind a UDP socket to find the source address to a destination
+mDNSexport void mDNSPlatformSourceAddrForDest(mDNSAddr *const src, const mDNSAddr *const dst)
+{
+ union { struct sockaddr s; struct sockaddr_in a4; struct sockaddr_in6 a6; } addr;
+ socklen_t len = sizeof(addr);
+ socklen_t inner_len = 0;
+ int sock = socket(AF_INET, SOCK_DGRAM, 0);
+ src->type = mDNSAddrType_None;
+ if (sock == -1) return;
+ if (dst->type == mDNSAddrType_IPv4)
+ {
+ inner_len = sizeof(addr.a4);
+ #ifndef NOT_HAVE_SA_LEN
+ addr.a4.sin_len = inner_len;
+ #endif
+ addr.a4.sin_family = AF_INET;
+ addr.a4.sin_port = 1; // Not important, any port will do
+ addr.a4.sin_addr.s_addr = dst->ip.v4.NotAnInteger;
+ }
+ else if (dst->type == mDNSAddrType_IPv6)
+ {
+ inner_len = sizeof(addr.a6);
+ #ifndef NOT_HAVE_SA_LEN
+ addr.a6.sin6_len = inner_len;
+ #endif
+ addr.a6.sin6_family = AF_INET6;
+ addr.a6.sin6_flowinfo = 0;
+ addr.a6.sin6_port = 1; // Not important, any port will do
+ addr.a6.sin6_addr = *(struct in6_addr*)&dst->ip.v6;
+ addr.a6.sin6_scope_id = 0;
+ }
+ else return;
+
+ if ((connect(sock, &addr.s, inner_len)) < 0)
+ { LogMsg("mDNSPlatformSourceAddrForDest: connect %#a failed errno %d (%s)", dst, errno, strerror(errno)); goto exit; }
+
+ if ((getsockname(sock, &addr.s, &len)) < 0)
+ { LogMsg("mDNSPlatformSourceAddrForDest: getsockname failed errno %d (%s)", errno, strerror(errno)); goto exit; }
+
+ src->type = dst->type;
+ if (dst->type == mDNSAddrType_IPv4) src->ip.v4.NotAnInteger = addr.a4.sin_addr.s_addr;
+ else src->ip.v6 = *(mDNSv6Addr*)&addr.a6.sin6_addr;
+exit:
+ close(sock);
+}
+
+// dst must be at least MAX_ESCAPED_DOMAIN_NAME bytes, and option must be less than 32 bytes in length
mDNSlocal mDNSBool GetConfigOption(char *dst, const char *option, FILE *f)
- {
- char buf[20+1+MAX_ESCAPED_DOMAIN_NAME]; // Option name, one space, option value
- unsigned int len = strlen(option);
- if (len + 1 + MAX_ESCAPED_DOMAIN_NAME > sizeof(buf)-1) { LogMsg("GetConfigOption: option %s too long", option); return mDNSfalse; }
- fseek(f, 0, SEEK_SET); // set position to beginning of stream
- while (fgets(buf, sizeof(buf), f)) // Read at most sizeof(buf)-1 bytes from file, and append '\0' C-string terminator
- {
- if (!strncmp(buf, option, len))
- {
- strncpy(dst, buf + len + 1, MAX_ESCAPED_DOMAIN_NAME-1);
- if (dst[MAX_ESCAPED_DOMAIN_NAME-1]) dst[MAX_ESCAPED_DOMAIN_NAME-1] = '\0';
- len = strlen(dst);
- if (len && dst[len-1] == '\n') dst[len-1] = '\0'; // chop newline
- return mDNStrue;
- }
- }
- debugf("Option %s not set", option);
- return mDNSfalse;
- }
-
-mDNSexport void ReadDDNSSettingsFromConfFile(mDNS *const m, const char *const filename, domainname *const hostname, domainname *const domain)
- {
- char zone [MAX_ESCAPED_DOMAIN_NAME];
- char fqdn [MAX_ESCAPED_DOMAIN_NAME];
- char secret[MAX_ESCAPED_DOMAIN_NAME] = "";
- int slen;
- mStatus err;
- FILE *f = fopen(filename, "r");
-
- hostname->c[0] = 0;
- domain->c[0] = 0;
-
- if (f)
- {
- if (GetConfigOption(fqdn, "hostname", f) && !MakeDomainNameFromDNSNameString(hostname, fqdn)) goto badf;
- if (GetConfigOption(zone, "zone", f) && !MakeDomainNameFromDNSNameString(domain, zone)) goto badf;
- GetConfigOption(secret, "secret-64", f); // failure means no authentication
- fclose(f);
- f = NULL;
- }
- else
- {
- if (errno != ENOENT) LogMsg("ERROR: Config file exists, but cannot be opened.");
- return;
- }
-
- if (secret[0])
- {
- // for now we assume keyname = service reg domain and we use same key for service and hostname registration
- slen = strlen(secret);
- err = mDNS_SetSecretForZone(m, domain, domain, secret, slen, mDNStrue);
- if (err) LogMsg("ERROR: mDNS_SetSecretForZone returned %d for domain %##s", err, domain->c);
- }
-
- return;
-
- badf:
- LogMsg("ERROR: malformatted config file");
- if (f) fclose(f);
- }
+{
+ char buf[32+1+MAX_ESCAPED_DOMAIN_NAME]; // Option name, one space, option value
+ unsigned int len = strlen(option);
+ if (len + 1 + MAX_ESCAPED_DOMAIN_NAME > sizeof(buf)-1) { LogMsg("GetConfigOption: option %s too long", option); return mDNSfalse; }
+ fseek(f, 0, SEEK_SET); // set position to beginning of stream
+ while (fgets(buf, sizeof(buf), f)) // Read at most sizeof(buf)-1 bytes from file, and append '\0' C-string terminator
+ {
+ if (!strncmp(buf, option, len))
+ {
+ strncpy(dst, buf + len + 1, MAX_ESCAPED_DOMAIN_NAME-1);
+ if (dst[MAX_ESCAPED_DOMAIN_NAME-1]) dst[MAX_ESCAPED_DOMAIN_NAME-1] = '\0';
+ len = strlen(dst);
+ if (len && dst[len-1] == '\n') dst[len-1] = '\0'; // chop newline
+ return mDNStrue;
+ }
+ }
+ debugf("Option %s not set", option);
+ return mDNSfalse;
+}
+
+mDNSexport void ReadDDNSSettingsFromConfFile(mDNS *const m, const char *const filename, domainname *const hostname, domainname *const domain, mDNSBool *DomainDiscoveryDisabled)
+{
+ char buf[MAX_ESCAPED_DOMAIN_NAME] = "";
+ mStatus err;
+ FILE *f = fopen(filename, "r");
+
+ if (hostname) hostname->c[0] = 0;
+ if (domain) domain->c[0] = 0;
+ if (DomainDiscoveryDisabled) *DomainDiscoveryDisabled = mDNSfalse;
+
+ if (f)
+ {
+ if (DomainDiscoveryDisabled && GetConfigOption(buf, "DomainDiscoveryDisabled", f) && !strcasecmp(buf, "true")) *DomainDiscoveryDisabled = mDNStrue;
+ if (hostname && GetConfigOption(buf, "hostname", f) && !MakeDomainNameFromDNSNameString(hostname, buf)) goto badf;
+ if (domain && GetConfigOption(buf, "zone", f) && !MakeDomainNameFromDNSNameString(domain, buf)) goto badf;
+ buf[0] = 0;
+ GetConfigOption(buf, "secret-64", f); // failure means no authentication
+ fclose(f);
+ f = NULL;
+ }
+ else
+ {
+ if (errno != ENOENT) LogMsg("ERROR: Config file exists, but cannot be opened.");
+ return;
+ }
+
+ if (domain && domain->c[0] && buf[0])
+ {
+ DomainAuthInfo *info = (DomainAuthInfo*)mDNSPlatformMemAllocate(sizeof(*info));
+ // for now we assume keyname = service reg domain and we use same key for service and hostname registration
+ err = mDNS_SetSecretForDomain(m, info, domain, domain, buf, NULL, 0, mDNSfalse);
+ if (err) LogMsg("ERROR: mDNS_SetSecretForDomain returned %d for domain %##s", err, domain->c);
+ }
+
+ return;
+
+badf:
+ LogMsg("ERROR: malformatted config file");
+ if (f) fclose(f);
+}
+
+#if MDNS_DEBUGMSGS
+mDNSexport void mDNSPlatformWriteDebugMsg(const char *msg)
+{
+ fprintf(stderr,"%s\n", msg);
+ fflush(stderr);
+}
+#endif
+
+mDNSexport void mDNSPlatformWriteLogMsg(const char *ident, const char *buffer, mDNSLogLevel_t loglevel)
+{
+#if APPLE_OSX_mDNSResponder && LogTimeStamps
+ extern mDNS mDNSStorage;
+ extern mDNSu32 mDNSPlatformClockDivisor;
+ mDNSs32 t = mDNSStorage.timenow ? mDNSStorage.timenow : mDNSPlatformClockDivisor ? mDNS_TimeNow_NoLock(&mDNSStorage) : 0;
+ int ms = ((t < 0) ? -t : t) % 1000;
+#endif
+
+ if (mDNS_DebugMode) // In debug mode we write to stderr
+ {
+#if APPLE_OSX_mDNSResponder && LogTimeStamps
+ if (ident && ident[0] && mDNSPlatformClockDivisor)
+ fprintf(stderr,"%8d.%03d: %s\n", (int)(t/1000), ms, buffer);
+ else
+#endif
+ fprintf(stderr,"%s\n", buffer);
+ fflush(stderr);
+ }
+ else // else, in production mode, we write to syslog
+ {
+ static int log_inited = 0;
+
+ int syslog_level = LOG_ERR;
+ switch (loglevel)
+ {
+ case MDNS_LOG_MSG: syslog_level = LOG_ERR; break;
+ case MDNS_LOG_OPERATION: syslog_level = LOG_WARNING; break;
+ case MDNS_LOG_SPS: syslog_level = LOG_NOTICE; break;
+ case MDNS_LOG_INFO: syslog_level = LOG_INFO; break;
+ case MDNS_LOG_DEBUG: syslog_level = LOG_DEBUG; break;
+ default:
+ fprintf(stderr, "Unknown loglevel %d, assuming LOG_ERR\n", loglevel);
+ fflush(stderr);
+ }
+
+ if (!log_inited) { openlog(ident, LOG_CONS, LOG_DAEMON); log_inited++; }
+
+#if APPLE_OSX_mDNSResponder && LogTimeStamps
+ if (ident && ident[0] && mDNSPlatformClockDivisor)
+ syslog(syslog_level, "%8d.%03d: %s", (int)(t/1000), ms, buffer);
+ else
+#endif
+ syslog(syslog_level, "%s", buffer);
+ }
+}
projects / apple / mdnsresponder.git / blobdiff