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Support :: in IPv6 Subnets.

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This commit is contained in:
Guus Sliepen 2012-03-25 22:54:36 +01:00
parent 482c6119a7
commit b23681dddb
3 changed files with 74 additions and 4 deletions
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72
src/subnet.c
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@ -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;
}