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Merge pull request #2702 from cesanta/zlw

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Allow zero-length 'last-will' messages
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Sergey Lyubka 2024-04-12 08:12:28 +01:00 committed by GitHub
commit be5d8b1d4f
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2 changed files with 2 additions and 2 deletions
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2
mongoose.c
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@ -4333,7 +4333,7 @@ void mg_mqtt_login(struct mg_connection *c, const struct mg_mqtt_opts *opts) {
total_len += 2 + (uint32_t) opts->pass.len;
hdr[7] |= MQTT_HAS_PASSWORD;
}
if (opts->topic.len > 0 && opts->message.len > 0) {
if (opts->topic.len > 0) { // allow zero-length msgs, message.len is size_t
total_len += 4 + (uint32_t) opts->topic.len + (uint32_t) opts->message.len;
hdr[7] |= MQTT_HAS_WILL;
}

2
src/mqtt.c
View File

@ -277,7 +277,7 @@ void mg_mqtt_login(struct mg_connection *c, const struct mg_mqtt_opts *opts) {
total_len += 2 + (uint32_t) opts->pass.len;
hdr[7] |= MQTT_HAS_PASSWORD;
}
if (opts->topic.len > 0 && opts->message.len > 0) {
if (opts->topic.len > 0) { // allow zero-length msgs, message.len is size_t
total_len += 4 + (uint32_t) opts->topic.len + (uint32_t) opts->message.len;
hdr[7] |= MQTT_HAS_WILL;
}