aboutsummaryrefslogtreecommitdiffstats
path: root/main/mtr/0001-dns-allow-disable-dns-during-compile-time.patch
blob: 46598c4976516a4aa71f98938c333e914ae0dfc1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
From 32863554ab50dfee32a25e641399c31b7fe7357d Mon Sep 17 00:00:00 2001
From: Natanael Copa <ncopa@alpinelinux.org>
Date: Fri, 6 Jul 2012 13:33:54 +0000
Subject: [PATCH] dns: allow disable dns during compile time

---
 configure.in | 14 +++++++++----
 dns.c        | 65 ++++++++++++++++++++++++++++++++++++------------------------
 mtr.c        | 10 +++++++++-
 3 files changed, 58 insertions(+), 31 deletions(-)

diff --git a/configure.in b/configure.in
index 8474543..1f53f74 100644
--- a/configure.in
+++ b/configure.in
@@ -72,10 +72,16 @@ AC_CHECK_FUNC(gethostbyname, ,
 AC_CHECK_FUNCS(seteuid)
 #  AC_CHECK_FUNC(setuid, , AC_MSG_ERROR (I Need either seteuid or setuid))
 
-AC_CHECK_FUNC(res_mkquery, , 
-  AC_CHECK_LIB(bind, res_mkquery, , 
-   AC_CHECK_LIB(resolv, res_mkquery, ,
-     AC_CHECK_LIB(resolv, __res_mkquery, , AC_MSG_ERROR(No resolver library found)))))
+AC_ARG_ENABLE([dns], AS_HELP_STRING([--disable-dns],[Disable use of DNS]))
+
+AS_IF([test "x$enable_dns" != "xno"],
+  AC_CHECK_FUNC(res_mkquery, , 
+    AC_CHECK_LIB(bind, res_mkquery, , 
+     AC_CHECK_LIB(resolv, res_mkquery, ,
+       AC_CHECK_LIB(resolv, __res_mkquery, , AC_MSG_ERROR(No resolver library found))))),
+  [AC_DEFINE([NO_DNS], [1], [Disable use of DNS])]
+)
+
 # This next line would override the just detected-or-not -lresolv. 
 # This apparently hurts BSD. And it's bad practise. So it should go. 
 # However, it probably didn't get added for nothing..... Holler if
diff --git a/dns.c b/dns.c
index 512da97..e85fcb3 100644
--- a/dns.c
+++ b/dns.c
@@ -48,6 +48,7 @@
 #include "mtr.h"
 #include "dns.h"
 #include "net.h"
+#include "config.h"
 
 /* OSX  Needs this. I don't know how to enable this for them automatically. 
  * Should be easy with autoconf. Please submit a patch if you know 
@@ -58,6 +59,11 @@
 #endif
 
 
+extern int af;
+int use_dns = 1;
+
+#ifndef NO_DNS
+
 #ifdef NO_STRERROR
 extern int sys_nerr;
 extern char *sys_errlist[];
@@ -69,7 +75,6 @@ extern char *sys_errlist[];
 extern int errno;
 #endif
 
-extern int af;
 
 /* Defines */
 
@@ -307,8 +312,6 @@ char stackstring[1024+1];
 
 char nullstring[] = "";
 
-int use_dns = 1;
-
 #ifdef res_ninit
 #define MY_RES_INIT() res_ninit(&myres);
 #define RES_MKQUERY(a, b, c, d, e, f, g, h, i) \
@@ -451,18 +454,6 @@ void clearset(fd_set *set)
 }
 
 
-char *strlongip(ip_t * ip)
-{
-#ifdef ENABLE_IPV6
-  static char buf[INET6_ADDRSTRLEN];
-
-  return (char *) inet_ntop( af, ip, buf, sizeof buf );
-#else
-  return inet_ntoa( *ip );
-#endif
-}
-
-
 int longipstr( char *s, ip_t *dst, int af )
 {
 #ifdef ENABLE_IPV6
@@ -473,17 +464,6 @@ int longipstr( char *s, ip_t *dst, int af )
 }
 
 
-struct hostent * dns_forward(const char *name)
-{
-  struct hostent *host;
-
-  if ((host = gethostbyname(name)))
-    return host;
-  else
-    return NULL;
-}
-
-
 int dns_waitfd(void)
 {
   return resfd;
@@ -1397,6 +1377,39 @@ void addr2ip6arpa( ip_t * ip, char * buf ) {
 }
 #endif
 
+#else /* NO_DNS */
+void dns_ack(void) {}
+void dns_events(double *sinterval) {}
+int dns_waitfd(void) { return 0; }
+void dns_open(void) { use_dns = dns = 0; }
+char *dns_lookup2(ip_t * ip) { return NULL; }
+char *dns_lookup(ip_t * ip) { return strlongip (ip); }
+
+#endif /* NO_DNS */
+
+struct hostent * dns_forward(const char *name)
+{
+  struct hostent *host;
+
+  if ((host = gethostbyname(name)))
+    return host;
+  else
+    return NULL;
+}
+
+
+char *strlongip(ip_t * ip)
+{
+#ifdef ENABLE_IPV6
+  static char buf[INET6_ADDRSTRLEN];
+
+  return (char *) inet_ntop( af, ip, buf, sizeof buf );
+#else
+  return inet_ntoa( *ip );
+#endif
+}
+
+
 /* Resolve an IP address to a hostname. */ 
 struct hostent *addr2host( const char *addr, int af ) {
   int len = 0;
diff --git a/mtr.c b/mtr.c
index 5f1b651..1fc3873 100644
--- a/mtr.c
+++ b/mtr.c
@@ -143,7 +143,9 @@ void parse_arg (int argc, char **argv)
     { "bitpattern", 1, 0, 'b' },/* overload b>255, ->rand(0,255) */
     { "tos", 1, 0, 'Q' },	/* typeof service (0,255) */
     { "mpls", 0, 0, 'e' },
+#ifndef NO_DNS
     { "no-dns", 0, 0, 'n' },
+#endif
     { "address", 1, 0, 'a' },
     { "first-ttl", 1, 0, 'f' },	/* -f & -m are borrowed from traceroute */
     { "max-ttl", 1, 0, 'm' },
@@ -204,9 +206,11 @@ void parse_arg (int argc, char **argv)
     case 'e':
       enablempls = 1;
       break;
+#ifndef NO_DNS
     case 'n':
       dns = 0;
       break;
+#endif
     case 'i':
       WaitTime = atof (optarg);
       if (WaitTime <= 0.0) {
@@ -382,7 +386,11 @@ int main(int argc, char **argv)
   if (PrintHelp) {
     printf("usage: %s [-hvrwctglspniu46] [--help] [--version] [--report]\n"
 	   "\t\t[--report-wide] [--report-cycles=COUNT] [--curses] [--gtk]\n"
-           "\t\t[--raw] [--split] [--mpls] [--no-dns] [--address interface]\n" /* BL */
+           "\t\t[--raw] [--split] [--mpls] "
+#ifndef NO_DNS
+	   "[--no-dns] "
+#endif
+	   "[--address interface]\n" /* BL */
            "\t\t[--psize=bytes/-s bytes]\n"            /* ok */
            "\t\t[--report-wide|-w] [-u]\n"            /* rew */
 	   "\t\t[--interval=SECONDS] HOSTNAME [PACKETSIZE]\n", argv[0]);
-- 
1.7.11.1