### Problem Some functional tests are shown as skipped when running on macOS & BSD because `test_framework/netutil.py` only implemented the Linux-specific logic for checking which TCP sockets a node is listening on. ### Fix Add macOS and BSD implementations in `test/functional/test_framework/netutil.py` so tests can query: * which TCP sockets a node is listening on (`get_bind_addrs()`, via `lsof`) * a non-loopback interface address (`all_interfaces()`, via `ifconfig`) Then enable the previously Linux-only tests by switching to a shared POSIX platform guard. ### Commands

get_bind_addrs() (lsof + regex)

> Command used ```bash lsof -nP -a -p -iTCP -sTCP:LISTEN -Ftn ``` > Flags - -D: device cache warnings - -n: no hostname resolution - -P: no service/port-name resolution - -a: AND all conditions - -p : filter by process ID - -iTCP: TCP sockets only - -sTCP:LISTEN: listening sockets only - -Ftn: machine-readable output (fields: type `t`, name `n`) > Regex parser ```regex t(IPv[46])\nn(\*|\[.+?]|[^:]+):(\d+) ``` > Captured groups - group 1: IPv4 / IPv6 (used to disambiguate `*`) - group 2: host (`*`, `[::1]`, `127.0.0.1`, ...) - group 3: port

all_interfaces() (ifconfig + regex)

> Command used ```bash ifconfig -au ``` > Regex parsing Interface blocks: ```regex (?m)^(?P\S+):(?P[^\n]*(?:\n[ \t]+[^\n]*)*) ``` IPv4 extraction within each block: ```regex inet (\S+) ```

### Notes The only remaining platform skips on macOS are the USDT/BPF tracing tests (`interface_usdt_*.py`).

test: support `get_bind_addrs` and `feature_bind_extra` on macOS & BSD