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Fix ip2long in AIX to treat IPs with leading zeros as invalid like LINUX #21296

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Fix ip2long in AIX to treat IPs with leading zeros as invalid like LINUX #21296

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11 changes: 11 additions & 0 deletions ext/standard/basic_functions.c
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Original file line number Diff line number Diff line change
Expand Up @@ -598,6 +598,17 @@ PHP_FUNCTION(ip2long)
if (addr_len == 0 || inet_pton(AF_INET, addr, &ip) != 1) {
RETURN_FALSE;
}
#ifdef _AIX
/*
AIX accepts IP strings with excedentary 0 (192.168.042.42 will be treated as
192.168.42.42), while Linux don't.
For consistency, we convert back the IP to a string and check if it is equal to
the original string. If not, the IP should be considered invalid.
*/
if (strcmp(addr, inet_ntoa(ip)) != 0) {
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@devnexen devnexen Feb 25, 2026

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quick question: is inet_ntop available on AIX ?

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@reshmavk reshmavk Feb 25, 2026

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Yes, inet_ntop is available

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@devnexen devnexen Feb 25, 2026

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I think it is preferable over inet_ntoa. I know it s easier, but it is also deprecated.

RETURN_FALSE;
}
#endif
RETURN_LONG(ntohl(ip.s_addr));
}
/* }}} */
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