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netlib: set addr.sin_zero to 0 in netlib_set_ipv4dnsaddr

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In dns_add_nameserver, the dns_check_nameserver is comparing addresses
with addrlen = sizeof(struct sockaddr_in) for IPv4 addresses, so the
trailing sin_zero field should be 0, otherwise it may fail to figure out
same nameserver address.

Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>
This commit is contained in:
Zhe Weng 2023-05-19 19:47:16 +08:00 • committed by Petro Karashchenko
parent e81227f99d
commit f671c004df
1 changed files with 1 additions and 0 deletions
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netutils/netlib/netlib_setipv4dnsaddr.c
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@ -68,6 +68,7 @@ int netlib_set_ipv4dnsaddr(FAR const struct in_addr *inaddr)
addr.sin_family = AF_INET;
addr.sin_port = 0;
memcpy(&addr.sin_addr, inaddr, sizeof(struct in_addr));
bzero(&addr.sin_zero, sizeof(addr.sin_zero));
ret = dns_add_nameserver((FAR const struct sockaddr *)&addr,
sizeof(struct sockaddr_in));