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libc/netdb: Hold dns lock when operating with resolv.conf

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Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit is contained in:
Xiang Xiao 2022-04-01 12:05:22 +08:00 committed by Masayuki Ishikawa
parent cd695cd0d9
commit 499c450d36
2 changed files with 14 additions and 4 deletions
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10
libs/libc/netdb/lib_dnsaddserver.c
View File

@ -81,6 +81,8 @@ int dns_add_nameserver(FAR const struct sockaddr *addr, socklen_t addrlen)
return ret;
}
dns_semtake();
#ifdef CONFIG_NET_IPv4
/* Check for an IPv4 address */
@ -183,11 +185,17 @@ int dns_add_nameserver(FAR const struct sockaddr *addr, socklen_t addrlen)
goto errout;
}
dns_notify_nameserver(addr, addrlen);
ret = OK;
errout:
dns_semgive();
fclose(stream);
if (ret == OK)
{
dns_notify_nameserver(addr, addrlen);
}
return ret;
}

8
libs/libc/netdb/lib_dnsforeach.c
View File

@ -96,6 +96,8 @@ int dns_foreach_nameserver(dns_callback_t callback, FAR void *arg)
return ret;
}
dns_semtake();
keylen = strlen(NETDB_DNS_KEYWORD);
while (fgets(line, DNS_MAX_LINE, stream) != NULL)
{
@ -218,14 +220,14 @@ int dns_foreach_nameserver(dns_callback_t callback, FAR void *arg)
if (ret != OK)
{
fclose(stream);
return ret;
break;
}
}
}
dns_semgive();
fclose(stream);
return OK;
return ret;
}
#else /* CONFIG_NETDB_RESOLVCONF */