[Pkg-privacy-commits] [onioncat] 12/340: improved FreeBSD tun code

[Ximin Luo]

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infinity0 pushed a commit to branch debian
in repository onioncat.

commit 829da1d793dea83a61ac17ef87c0829bde7d23c4
Author: eagle <eagle at 58e1ccc2-750e-0410-8d0d-f93ca75ab447>
Date:   Fri Feb 8 11:37:44 2008 +0000

    improved FreeBSD tun code
    
    git-svn-id: http://www.cypherpunk.at/svn/onioncat/trunk@127 58e1ccc2-750e-0410-8d0d-f93ca75ab447
---
 ocat.h       |  1 +
 ocatroute.c  |  5 +++++
 ocattun.c    | 17 ++++++++++++++---
 ocatv6conv.c |  7 +++++++
 4 files changed, 27 insertions(+), 3 deletions(-)

diff --git a/ocat.h b/ocat.h
index 88c74cc..7e69968 100644
--- a/ocat.h
+++ b/ocat.h
@@ -105,6 +105,7 @@ int has_tor_prefix(const struct in6_addr *);
 /* ocattun.c */
 #ifndef WITHOUT_TUN
 int tun_alloc(char *, struct in6_addr);
+void test_tun_hdr(void);
 #endif
 
 /* ocatroute.c */
diff --git a/ocatroute.c b/ocatroute.c
index 85e191e..e2ad771 100644
--- a/ocatroute.c
+++ b/ocatroute.c
@@ -298,6 +298,11 @@ int validate_frame(const struct ip6_hdr *ihd, int len)
       log_msg(L_ERROR, "[validate_frame] source address invalid. Remote ocat could not reply");
       return 0;
    }
+   if (is_testping(&ihd->ip6_dst))
+   {
+      log_msg(L_DEBUG, "[validate_frame] test ping detected");
+      return 0;
+   }
    return ntohs(ihd->ip6_plen);
 }
 
diff --git a/ocattun.c b/ocattun.c
index 8638f11..1034d81 100644
--- a/ocattun.c
+++ b/ocattun.c
@@ -57,6 +57,7 @@ int tun_alloc(char *dev, struct in6_addr addr)
    char buf[FRAME_SIZE];
 #endif
 
+	log_msg(L_DEBUG, "opening tun \"%s\"", tun_dev_);
    if( (fd = open(tun_dev_, O_RDWR)) < 0 )
       perror("open tun"), exit(1);
 
@@ -108,9 +109,6 @@ int tun_alloc(char *dev, struct in6_addr addr)
    if (system(buf) == -1)
       log_msg(L_ERROR, "could not exec \"%s\": \"%s\"", buf, strerror(errno));
 #else
-   sprintf(buf, "ifconfig tun0 inet6 %s/%d up", astr, TOR_PREFIX_LEN);
-/*   if (system(buf) == -1)
-      log_msg(L_ERROR, "could not exec \"%s\": \"%s\"", buf, strerror(errno));*/
    int prm = 1;
    if (ioctl(fd, TUNSIFHEAD, &prm) == -1)
       perror("ioctl:TUNSIFHEAD"), exit(1);
@@ -118,6 +116,12 @@ int tun_alloc(char *dev, struct in6_addr addr)
 //   prm = IFF_BROADCAST;
    if (ioctl(fd, TUNSIFMODE, &prm) == -1)
       perror("ioctl:TUNSIFMODE"), exit(1);
+
+   sprintf(buf, "ifconfig tun0 inet6 %s/%d up", astr, TOR_PREFIX_LEN);
+   log_msg(L_DEBUG, "setting IP on tun: \"%s\"", buf);
+   if (system(buf) == -1)
+      log_msg(L_ERROR, "could not exec \"%s\": \"%s\"", buf, strerror(errno));
+
 #endif
 #endif
 
@@ -136,8 +140,15 @@ void test_tun_hdr(void)
       log_msg(L_FATAL, "[test_tun_hdr] this should never happen..."), exit(1);
 
    inet_ntop(AF_INET6, &addr, addrstr, INET6_ADDRSTRLEN);
+#ifdef linux
    sprintf(buf, "ping6 -c 1 -w 1 %s >/dev/null 2>&1", addrstr);
+#else
+   //sprintf(buf, "ping6 -c 1 %s >/dev/null 2>&1", addrstr);
+   sprintf(buf, "ping6 -c 1 %s", addrstr);
+#endif
    log_msg(L_NOTICE, "[test_tun_hdr] testing tun header: \"%s\"", buf);
+   // FIXME: This is somehow an unclean try to wait for ifconfig to finish
+   sleep(1);
    if (system(buf) == -1)
       log_msg(L_FATAL, "[test_tun_hdr] test failed: \"%s\"", strerror(errno));
    rlen = read(tunfd_[0], buf, FRAME_SIZE);
diff --git a/ocatv6conv.c b/ocatv6conv.c
index 24ab611..06bb571 100644
--- a/ocatv6conv.c
+++ b/ocatv6conv.c
@@ -20,6 +20,13 @@ static const char BASE32[] = "abcdefghijklmnopqrstuvwxyz234567";
 static const char tor_prefix_[] = TOR_PREFIX;
 
 
+int is_testping(const struct in6_addr *addr)
+{
+   char to[10] = {0,0,0,0,0,0,0,0,0,1};
+   return memcmp((char*) addr + 6, to, 10) == 0;
+}
+
+
 int has_tor_prefix(const struct in6_addr *addr)
 {
    return memcmp(addr, tor_prefix_, 6) == 0;

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