Advanced dgram methods

[gvilums]

Tracking issue for the implementation of advanced dgram apis which are not going to ship in the initial version.

• setBroadcast
• setTTL
• setMulticastTTL
• setMulticastLoopback
• setMulticastInterface
• addMembership
• dropMembership
• addSourceSpecificMembership
• dropSourceSpecificMembership

[jebarpg]

When will this issue be tackled?

[Jarred-Sumner]

When will this issue be tackled?

What do you use these APIs for?

For prioritization, it's helpful to understand the intended usecases and what packages/libraries or companies it's blocking. It seemed like the biggest usecase for dgram previously was dd-trace and possibly Discord voice chat APIs.

[Letrab]

When will this issue be tackled?

What do you use these APIs for?

For prioritization, it's helpful to understand the intended usecases and what packages/libraries or companies it's blocking. It seemed like the biggest usecase for dgram previously was dd-trace and possibly Discord voice chat APIs.

Everything using multicast is affected, some examples on top of my mind:

• Device discovery of many IoT devices: Sonos, vaccuum robots, ... : https://github.com/project-chip/matter.js , https://github.com/jghaanstra/com.xiaomi-miio
• mDNS / bonjour: https://www.npmjs.com/package/multicast-dns , https://github.com/homebridge/ciao
• System frameworks : https://github.com/moleculerjs/moleculer , https://github.com/Ylianst/MeshCentral
• Many streaming services (multicast streaming data) : https://github.com/bitfocus/companion , https://github.com/philhartung/aes67-sender , https://github.com/k-yle/sACN

While I understand that the plain UDP support was a priority, I don't think this may be forgotten easily 👍 . In my case it would be a huge addition! Thanks already for your work on this!

[jedahan]

setBroadcast (or just setting SO_BROADCAST) is useful for dns-sd/mDNS, which I use in a lot of my projects. Honestly, looking at one of the implementations, I think this could be pulled out to a new ticket and mark as 'good first contribution' or something like that. I'd be willing to tackle it as long as people were patient (history says no lol) in me implementing it in a like, 2-3 week time frame.

from https://github.com/libuv/libuv/blob/520eb622f012c4cc17410ba702f82aebdb93c518/src/unix/udp.c#L1176C1-L1186C2

int uv_udp_set_broadcast(uv_udp_t* handle, int on) {
  if (setsockopt(handle->io_watcher.fd,
                 SOL_SOCKET,
                 SO_BROADCAST,
                 &on,
                 sizeof(on))) {
    return UV__ERR(errno);
  }

  return 0;
}

[recanman]

I've been wanting to use this library to retrieve metrics from collectd.
It uses addMembership.

[espired]

Using both Bonjour and custom code with dgram .
Mainly for service discovery

[loicnestler]

setBroadcast is used by cote.js (a microservice framework that relies on broadcasting)

[kran6a]

setMulticastTTL brought me here. It is used by bonjour-service, which I use for service discovery.

[jedahan]

setBroadcast (or just setting SO_BROADCAST) is useful for dns-sd/mDNS, which I use in a lot of my projects. Honestly, looking at one of the implementations, I think this could be pulled out to a new ticket and mark as 'good first contribution' or something like that. I'd be willing to tackle it as long as people were patient (history says no lol) in me implementing it in a like, 2-3 week time frame.

from https://github.com/libuv/libuv/blob/520eb622f012c4cc17410ba702f82aebdb93c518/src/unix/udp.c#L1176C1-L1186C2

int uv_udp_set_broadcast(uv_udp_t* handle, int on) {
  if (setsockopt(handle->io_watcher.fd,
                 SOL_SOCKET,
                 SO_BROADCAST,
                 &on,
                 sizeof(on))) {
    return UV__ERR(errno);
  }

  return 0;
}

Started getting the dev environment up today and writing failing test cases. Mentioning it in case someone else has already started work on it so I am not stepping on any toes.

[rgillan]

Hi, just ran into this one failing with setBroadcast, being called by matter-node.js, which relies upon mDNS for device discovery.