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Log DNS errors.

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This patch is imported from the rinetd Debian package.
This commit is contained in:
Sam Hocevar 2016-01-10 22:44:25 +01:00
parent 90d1655c74
commit 21af463eae
1 changed files with 18 additions and 1 deletions

19
rinetd.c
View File

@ -1330,7 +1330,7 @@ int getAddress(char *host, struct in_addr *iaddr)
char *p = host;
int ishost = 0;
while (*p) {
if (!(isdigit(*p) || ((*p) == '.'))) {
if (!isdigit(*p) && (*p) != '.') {
ishost = 1;
break;
}
@ -1340,6 +1340,23 @@ int getAddress(char *host, struct in_addr *iaddr)
struct hostent *h;
h = gethostbyname(host);
if (!h) {
const char *msg = "(unknown DNS error)";
switch(h_errno)
{
case HOST_NOT_FOUND:
msg = "The specified host is unknown.";
break;
case NO_ADDRESS:
msg = "The requested name is valid but does not have an IP address.";
break;
case NO_RECOVERY:
msg = "A non-recoverable name server error occurred.";
break;
case TRY_AGAIN:
msg = "A temporary error occurred on an authoritative name server. Try again later.";
break;
}
syslog(LOG_ERR, "While resolving `%s' got: %s", host, msg);
return 0;
}
memcpy(