Support :: in IPv6 Subnets.

diff --git a/doc/tinc.conf.5.in b/doc/tinc.conf.5.in
index 8034418..f6b0da4 100644 (file)
--- a/doc/tinc.conf.5.in
+++ b/doc/tinc.conf.5.in
@@ -564,12 +564,11 @@ variables can be specified.
 Subnets can either be single MAC, IPv4 or IPv6 addresses,
 in which case a subnet consisting of only that single address is assumed,
 or they can be a IPv4 or IPv6 network address with a prefixlength.
-Shorthand notations are not supported.
 For example, IPv4 subnets must be in a form like 192.168.1.0/24,
 where 192.168.1.0 is the network address and 24 is the number of bits set in the netmask.
 Note that subnets like 192.168.1.1/24 are invalid!
 Read a networking HOWTO/FAQ/guide if you don't understand this.
-IPv6 subnets are notated like fec0:0:0:1:0:0:0:0/64.
+IPv6 subnets are notated like fec0:0:0:1::/64.
 MAC addresses are notated like 0:1a:2b:3c:4d:5e.
 
 .Pp

diff --git a/doc/tinc.texi b/doc/tinc.texi
index c8eea1f..d0fb70d 100644 (file)
--- a/doc/tinc.texi
+++ b/doc/tinc.texi
@@ -1162,12 +1162,11 @@ Multiple subnet lines can be specified for each daemon.
 Subnets can either be single MAC, IPv4 or IPv6 addresses,
 in which case a subnet consisting of only that single address is assumed,
 or they can be a IPv4 or IPv6 network address with a prefixlength.
-Shorthand notations are not supported.
 For example, IPv4 subnets must be in a form like 192.168.1.0/24,
 where 192.168.1.0 is the network address and 24 is the number of bits set in the netmask.
 Note that subnets like 192.168.1.1/24 are invalid!
 Read a networking HOWTO/FAQ/guide if you don't understand this.
-IPv6 subnets are notated like fec0:0:0:1:0:0:0:0/64.
+IPv6 subnets are notated like fec0:0:0:1::/64.
 MAC addresses are notated like 0:1a:2b:3c:4d:5e.
 
 @cindex CIDR notation

diff --git a/src/subnet.c b/src/subnet.c
index 7fffe63..d7b9f47 100644 (file)
--- a/src/subnet.c
+++ b/src/subnet.c
@@ -268,6 +268,78 @@ bool str2net(subnet_t *subnet, const char *subnetstr) {
                return true;
        }
 
+       // IPv6 short form
+       if(strstr(subnetstr, "::")) {
+               const char *p;
+               char *q;
+               int colons = 0;
+
+               // Count number of colons
+               for(p = subnetstr; *p; p++)
+                       if(*p == ':')
+                               colons++;
+
+               if(colons > 7)
+                       return false;
+
+               // Scan numbers before the double colon
+               p = subnetstr;
+               for(i = 0; i < colons; i++) {
+                       if(*p == ':')
+                               break;
+                       x[i] = strtoul(p, &q, 0x10);
+                       if(!q || p == q || *q != ':')
+                               return false;
+                       p = ++q;
+               }
+
+               p++;
+               colons -= i;
+               if(!i) {
+                       p++;
+                       colons--;
+               }
+
+               if(!*p || *p == '/' || *p == '#')
+                       colons--;
+
+               // Fill in the blanks
+               for(; i < 8 - colons; i++)
+                       x[i] = 0;
+
+               // Scan the remaining numbers
+               for(; i < 8; i++) {
+                       x[i] = strtoul(p, &q, 0x10);
+                       if(!q || p == q)
+                               return false;
+                       if(i == 7) {
+                               p = q;
+                               break;
+                       }
+                       if(*q != ':')
+                               return false;
+                       p = ++q;
+               }
+
+               l = 128;
+               if(*p == '/')
+                       sscanf(p, "/%d#%d", &l, &weight);
+               else if(*p == '#')
+                       sscanf(p, "#%d", &weight);
+
+               if(l < 0 || l > 128)
+                       return false;
+
+               subnet->type = SUBNET_IPV6;
+               subnet->net.ipv6.prefixlength = l;
+               subnet->weight = weight;
+
+               for(i = 0; i < 8; i++)
+                       subnet->net.ipv6.address.x[i] = htons(x[i]);
+
+               return true;
+       }
+
        return false;
 }