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cache: optimize cname TTL

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This commit is contained in:
Nick Peng
2022-02-17 23:15:11 +08:00
parent 0652316e98
commit d7d7ef48cd
4 changed files with 52 additions and 3 deletions
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40
src/dns.c
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@@ -1369,6 +1369,38 @@ static int _dns_decode_opt_ecs(struct dns_context *context, struct dns_opt_ecs *
return 0;
}
static int _dns_decode_opt_cookie(struct dns_context *context, struct dns_opt_cookie *cookie)
{
// TODO
int len = _dns_left_len(context);
if (len < 8) {
return -1;
}
len = 8;
memcpy(cookie->client_cookie, context->ptr, len);
context->ptr += len;
len = _dns_left_len(context);
if (len == 0) {
cookie->server_cookie_len = 0;
return 0;
}
if (len < 8) {
return -1;
}
memcpy(cookie->server_cookie, context->ptr, len);
cookie->server_cookie_len = len;
context->ptr += len;
tlog(TLOG_DEBUG, "OPT COOKIE");
return 0;
}
static int _dns_encode_OPT(struct dns_context *context, struct dns_rrs *rrs)
{
int ret;
@@ -1551,6 +1583,14 @@ static int _dns_decode_opt(struct dns_context *context, dns_rr_type type, unsign
return -1;
}
} break;
case DNS_OPT_T_COOKIE: {
struct dns_opt_cookie cookie;
ret = _dns_decode_opt_cookie(context, &cookie);
if (ret != 0) {
tlog(TLOG_ERROR, "decode cookie failed.");
return -1;
}
} break;
default:
context->ptr += opt_len;
tlog(TLOG_DEBUG, "DNS opt type = %d not supported", opt_code);