> Solves the "Make sure new member of socket address initialized." warning for the bluetooth sockaddr_l2cap usage.

You would to elaborate how you checked that all members of the socket address are initialized? Which socketmodule.c functions use this type? Are all members initialized?

https://www.leidinger.net/FreeBSD/dox/netgraph/html/d2/de3/structsockaddr__l2cap.html

A quick search points me to:
https://www.leidinger.net/FreeBSD/dox/netgraph/html/d2/de3/structsockaddr__l2cap.html
---
u_char 	l2cap_len 
u_char 	l2cap_family 
u_int16_t 	l2cap_psm 
bdaddr_t 	l2cap_bdaddr 
u_int16_t 	l2cap_cid 
u_int8_t 	l2cap_bdaddr_type
---

In BTPROTO_L2CAP case of getsockaddrarg(), it seems like only l2cap_family and l2cap_bdaddr are set, other members are set to 0. Is it enough? It seems like the important call is:

memset(addr, 0, sizeof(struct sockaddr_l2));

On FreeBSD, socketmodule.c uses:

#define sockaddr_l2 sockaddr_l2cap