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upstream: Add error messages in case of inet_aton() failure

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This commit is contained in:
kikuchan 2018-04-12 22:56:50 +09:00
parent 531080d871
commit 6d7b0389af
1 changed files with 15 additions and 3 deletions
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18
src/upstream.c
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@ -46,7 +46,7 @@ proxy_type_name(proxy_type type)
/**
* Parse and process a netmask format (IP/mask), otherwise treat as a domain
*/
static void upstream_handle_site_spec(struct upstream *up, const char *domain)
static int upstream_handle_site_spec(struct upstream *up, const char *domain)
{
char *ptr;
@ -63,14 +63,18 @@ static void upstream_handle_site_spec(struct upstream *up, const char *domain)
if (inet_aton (ptr, &addrstruct) != 0)
up->mask =
ntohl (addrstruct.s_addr);
else return 0;
} else {
up->mask =
~((1 << (32 - atoi (ptr))) - 1);
}
} else {
return 0;
}
} else {
up->domain = safestrdup (domain);
}
return 1;
}
/**
* Construct an upstream struct from input data.
@ -127,7 +131,11 @@ static struct upstream *upstream_build (const char *host, int port, const char *
goto fail;
}
upstream_handle_site_spec(up, domain);
if (!upstream_handle_site_spec(up, domain)) {
log_message (LOG_WARNING,
"Nonsense no-upstream rule: malformed IP address or mask");
goto fail;
}
log_message (LOG_INFO, "Added no-upstream for %s", domain);
} else {
@ -141,7 +149,11 @@ static struct upstream *upstream_build (const char *host, int port, const char *
up->host = safestrdup (host);
up->port = port;
upstream_handle_site_spec(up, domain);
if (!upstream_handle_site_spec(up, domain)) {
log_message (LOG_WARNING,
"Nonsense upstream rule: malformed IP address or mask");
goto fail;
}
log_message (LOG_INFO, "Added upstream %s %s:%d for %s",
proxy_type_name(type), host, port, domain);