mDNSResponder-379.27.tar.gz

[apple/mdnsresponder.git] / mDNSShared / PlatformCommon.c

diff --git a/mDNSShared/PlatformCommon.c b/mDNSShared/PlatformCommon.c
index 3baee26c699bb4c746625fd3f1c303c5b2bc9240..f650c10d00c61eaf4553ab5df3eeadb4ff9e734c 100644 (file)
--- a/mDNSShared/PlatformCommon.c
+++ b/mDNSShared/PlatformCommon.c
@@ -2,135 +2,195 @@
  *
  * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
  *
  *
  * 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.
  * limitations under the License.

- *
- * @APPLE_LICENSE_HEADER_END@
-
-    Change History (most recent first):
-
-$Log: PlatformCommon.c,v $
-Revision 1.5  2005/02/01 19:33:30  ksekar
-<rdar://problem/3985239> Keychain format too restrictive
-
-Revision 1.4  2005/01/19 19:19:21  ksekar
-<rdar://problem/3960191> Need a way to turn off domain discovery
-
-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
 #include "PlatformCommon.h"
 
 #ifdef NOT_HAVE_SOCKLEN_T

-    typedef unsigned int socklen_t;
+typedef unsigned int socklen_t;

 #endif
 
 #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;
-       }
+// 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)
 
 // 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[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;
-       }
+{
+    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)
 
 mDNSexport void ReadDDNSSettingsFromConfFile(mDNS *const m, const char *const filename, domainname *const hostname, domainname *const domain, mDNSBool *DomainDiscoveryDisabled)

-       {
-       char buf   [MAX_ESCAPED_DOMAIN_NAME];
-       char secret[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;
-               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 (domain && domain->c[0] && secret[0])
-               {
-               // for now we assume keyname = service reg domain and we use same key for service and hostname registration
-               err = mDNS_SetSecretForZone(m, domain, domain, secret);
-               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[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);
+    }
+}