ref: 066812db79f10a3cdee5268ad7214bacb44d2eef
dir: /lib/std/listen+posixy.myr/
use sys use "alloc" use "chartype" use "dialparse" use "die" use "endian" use "mk" use "option" use "resolve" use "result" use "slcp" use "sleq" use "strfind" use "striter" use "syswrap" use "traits" use "utf" pkg std = type announce = struct lfd : fd ;; const announce : (ds : byte[:] -> result(announce#, byte[:])) const aclose : (a : announce# -> void) const accept : (a : announce# -> result(fd, byte[:])) ;; const announce = {ds match nameseg(ds) | `Some ("tcp", str): -> announcesock(sys.Sockstream, str) | `Some ("udp", str): -> announcesock(sys.Sockdgram, str) | `Some ("unix", str): -> announceunix(str) | `Some (proto, str): -> `Err "unknown protocol" | `None: -> `Err "missing protocol" ;; } const aclose = {a close(a.lfd) free(a) } const announcesock = {proto, str var sa4 : sys.sockaddr_in var sa6 : sys.sockaddr_in6 var sa : sys.sockaddr# var hoststr, portstr, port var sock, sz var yes match nameseg(str) | `None: -> `Err "required addr!port for ip listen" | `Some ("", _): -> `Err "empty host" | `Some (_, ""): -> `Err "empty port" | `Some segs: (hoststr, portstr) = segs ;; match parseport(portstr) | `Some p: port = p | `None: -> `Err("invalid port") ;; if eq(hoststr, "*") sa6=[.fam=sys.Afinet6, .port=hosttonet(port)] sa = (&sa6 : sys.sockaddr#) sz = sizeof(sys.sockaddr_in6) else match getaddr(hoststr) | `Ok `Ipv4 bits: sa4=[.fam=sys.Afinet, .addr=bits, .port=hosttonet(port)] sa = (&sa4 : sys.sockaddr#) sz = sizeof(sys.sockaddr_in) | `Ok `Ipv6 bits: sa6=[.fam=sys.Afinet6, .addr=bits, .port=hosttonet(port)] sa = (&sa6 : sys.sockaddr#) sz = sizeof(sys.sockaddr_in6) | `Err m: -> `Err m ;; ;; sock = sys.socket(sa.fam, proto, 0) if sock < 0 -> `Err "failed to create socket" ;; yes = 1 if sys.setsockopt(sock, sys.Solsocket, sys.Soreuseaddr, (&yes : void#), sizeof(int)) < 0 -> `Err "failed to set sock opts" ;; if sys.bind(sock, sa, sz) < 0 -> `Err "failed to bind socket" ;; if sys.listen((sock : sys.fd), 10) < 0 -> `Err "unable to listen on socket" ;; -> `Ok mk([.lfd=(sock : fd)]) } const announceunix = {path var sa : sys.sockaddr_un var sock var yes sa = [.fam = sys.Afunix] if path.len >= sa.path.len -> `Err "path too long" ;; slcp(sa.path[:path.len], path) sock = sys.socket(sys.Afunix, sys.Sockstream, 0) if sock < 0 -> `Err "failed to create socket" ;; yes = 1 if sys.setsockopt(sock, sys.Solsocket, sys.Soreuseaddr, (&yes : void#), sizeof(int)) < 0 -> `Err "failed to set sock opts" ;; sys.unlink(path) if sys.bind(sock, (&sa : sys.sockaddr#), sizeof(sys.sockaddr_un)) < 0 -> `Err "failed to bind address" ;; if sys.listen((sock : sys.fd), 10) < 0 -> `Err "unable to listen on socket" ;; -> `Ok mk([.lfd=(sock : fd)]) } const accept = {a var sa : sys.sockaddr_storage var len : sys.size var fd fd = sys.accept((a.lfd : sys.fd), (0 : sys.sockaddr#), (0 : sys.size#)) if fd < 0 -> `Err "unable to accept socket" ;; -> `Ok (fd : fd) }