IOS uses usrsctp data transmission, usrsctp_bind returns an error.

[LiuAriel]

When IOS uses usrsctp data transmission, usrsctp_bind returns an errno. The errno code is 49. The errno message is that the requested address cannot be allocated. The library used is the latest version and there is no ip/port occupation.

[paullouisageneau]

Does it happen immediately on the first peer connection? Do you build the usrsctp submodule or do you link an external library? If you build the submodule, does updating deps/usrsctp to last master fix the issue?

[LiuAriel]

At present, every time ICE succeeds, it will fail. I took out the sctp calling code separately, including directly using the official example to directly initialize and call the sctp corresponding interface. usrsctp_bind will also fail. I used the latest sctp master version, and before Neither does the version. Can you confirm the problem? The iOS version is 16.5. I wonder if it is a problem with the sctp permissions of the iOS system itself. I transplanted it to the Android version and the Linux system and it can run normally.

[paullouisageneau]

I can't reproduce as I don't have any Apple device. This sounds more like an issue with usrsctp on iOS then, I think you should report it there.