1 // zero compression for the last field in an ipv6 address is (probably) allowed
2 // https://tools.ietf.org/html/rfc4291#section-2.2
3 // but further fields shouldnt buffer overflow
4 #include <stdio.h>
5 #include <string.h>
6 #include <arpa/inet.h>
7 #include "test.h"
8
txt(char * s,unsigned char * buf)9 static void txt(char *s, unsigned char *buf)
10 {
11 int i;
12 sprintf(s, "%04x", buf[0]<<8 | buf[1]);
13 for (i=1; i<8; i++)
14 sprintf(s+5*i, ":%04x", buf[2*i]<<8 | buf[2*i+1]);
15 }
16
main(void)17 int main(void)
18 {
19 char s[50], sw[50];
20 unsigned char buf[16];
21 unsigned char want[16] = {0,1,0,2,0,3,0,4,0,5,0,6,0,7,0,0};
22 char *addr;
23
24 addr = "1:2:3:4:5:6:7::";
25 if (inet_pton(AF_INET6, addr, buf)!=1 || memcmp(buf, want, 16)!=0) {
26 txt(s, buf);
27 txt(sw, want);
28 t_error("inet_pton(%s) returned %s, wanted %s\n",
29 addr, s, sw);
30 }
31
32 addr = "1:2:3:4:5:6:7::9:10:11:12:13:14:15:16:17:18:19:20";
33 if (inet_pton(AF_INET6, addr, buf)!=0) {
34 txt(s, buf);
35 t_error("inet_pton(%s) returned %s, wanted a failure\n",
36 addr, s);
37 }
38 return t_status;
39 }
40