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urlapi: accept :: as a valid IPv6 address

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Text 1560 is extended to verify.

Reported-by: Pavel Volgarev
Fixes #5344
Closes #5351
This commit is contained in:
Daniel Stenberg 2020-05-07 12:24:27 +02:00
parent 11e4ac8291
commit 7f1c098728
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GPG key ID: 5CC908FDB71E12C2
2 changed files with 10 additions and 1 deletions
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lib/urlapi.c
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@ -606,7 +606,7 @@ static CURLUcode hostname_check(struct Curl_URL *u, char *hostname)
char dest[16]; /* fits a binary IPv6 address */
#endif
const char *l = "0123456789abcdefABCDEF:.";
if(hlen < 5) /* '[::1]' is the shortest possible valid string */
if(hlen < 4) /* '[::]' is the shortest possible valid string */
return CURLUE_MALFORMED_INPUT;
hostname++;
hlen -= 2;