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mqtt: return error for too long topic

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Closes #9744
This commit is contained in:
Daniel Stenberg 2022-10-16 18:05:34 +02:00
parent 703efb3379
commit 9660f23010
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GPG Key ID: 5CC908FDB71E12C2
1 changed files with 12 additions and 4 deletions
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16
lib/mqtt.c
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@ -389,10 +389,18 @@ static CURLcode mqtt_get_topic(struct Curl_easy *data,
char **topic, size_t *topiclen)
{
char *path = data->state.up.path;
if(strlen(path) > 1)
return Curl_urldecode(path + 1, 0, topic, topiclen, REJECT_NADA);
failf(data, "No MQTT topic found. Forgot to URL encode it?");
return CURLE_URL_MALFORMAT;
CURLcode result = CURLE_URL_MALFORMAT;
if(strlen(path) > 1) {
result = Curl_urldecode(path + 1, 0, topic, topiclen, REJECT_NADA);
if(!result && (*topiclen > 0xffff)) {
failf(data, "Too long MQTT topic");
result = CURLE_URL_MALFORMAT;
}
}
else
failf(data, "No MQTT topic found. Forgot to URL encode it?");
return result;
}
static CURLcode mqtt_subscribe(struct Curl_easy *data)