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# 13jun24 Software Lab. Alexander Burger
(sysdefs "errno")
(sysdefs "networking")
(private) (ipErr Var)
(de ipErr (Msg)
(quit Msg (%@ "strErrno" 'S)) )
# (port ['T] 'cnt|(cnt . cnt) ['var]) -> cnt
(de port (A . @)
(let
(Type (ifn (=T A) SOCK_STREAM (setq A (next)) SOCK_DGRAM)
Sd (%@ "socket" 'I AF_INET6 Type 0) )
(when (lt0 Sd)
(ipErr "IP socket") )
(%@ "closeOnExec" NIL (cons T (up)) Sd)
~(as (<> *OS "OpenBSD")
(when
(lt0
(%@ "setsockopt" 'I Sd IPPROTO_IPV6 IPV6_V6ONLY
'(NIL (4 . I) (0 . 4))
4 ) )
(ipErr "IPV6_V6ONLY") ) )
(buf Addr sockaddr_in6
(%@ "memset" NIL Addr 0 sockaddr_in6)
(struct (+ Addr sin6_family) NIL (`AF_INET6 . 2))
(struct (+ Addr sin6_addr) NIL (0 . 8) (0 . 8)) # "::" (16 null-bytes)
(let Port A
(cond
((num? A)
(or
(=0 Port)
(ge0
(%@ "setsockopt" 'I Sd SOL_SOCKET SO_REUSEADDR
'(NIL (4 . I) (1 . 4))
4 ) )
(ipErr "SO_REUSEADDR") ) )
((pair A) (setq Port (car A)))
(T (quit "Bad argument" A)) )
(loop
(byte (+ Addr sin6_port) (>> 8 Port)) # Put big-endian (network byte order)
(byte (+ Addr sin6_port 1) Port)
(T (ge0 (%@ "bind" 'I Sd Addr sockaddr_in6)))
(when (or (atom A) (> (inc 'Port) (cdr A)))
(close Sd)
(ipErr "IP bind") ) )
(when
(and
(== Type SOCK_STREAM)
(lt0 (%@ "listen" 'I Sd 5)) )
(close Sd)
(ipErr "IP listen") )
(let? Var (next)
(when
(lt0
(%@ "getsockname" 'I Sd Addr
'(NIL (4 . I) (`sockaddr_in6 . 4)) ) )
(close Sd)
(ipErr "IP getsockname") )
(set Var
(+ # Get big-endian (network byte order)
(>> -8 (byte (+ Addr sin6_port)))
(byte (+ Addr sin6_port 1)) ) ) ) ) )
Sd ) )
# (accept 'cnt) -> cnt | NIL
(de accept (Sd)
(let (Flg (%@ "nonBlocking" 'I Sd) N 200)
(buf Addr sockaddr_in6
(loop
(T
(ge0
(%@ "accept" 'I Sd Addr
'(NIL (4 . I) (`sockaddr_in6 . 4)) ) )
(let Sd2 @
(%@ "fcntlSetFl" 'I Sd Flg)
~(as (member *OS '("OpenBSD" "FreeBSD"))
(%@ "fcntlSetFl" 'I Sd2 0) )
(buf Str INET6_ADDRSTRLEN
(setq *Adr
(%@ "inet_ntop" 'S AF_INET6 (+ Addr sin6_addr) Str INET6_ADDRSTRLEN) ) )
(setq *SPort
(+ # Get big-endian (network byte order)
(>> -8 (byte (+ Addr sin6_port)))
(byte (+ Addr sin6_port 1)) ) )
(%@ "initInFile" NIL Sd2 0)
(%@ "initOutFile" NIL Sd2)
Sd2 ) )
(NIL (and (== (errno) EAGAIN) (gt0 (dec 'N)))
(%@ "fcntlSetFl" NIL Sd Flg) )
(%@ "usleep" NIL 99999) ) ) ) )
# (listen 'cnt1 ['cnt2]) -> cnt | NIL
(de listen (Sd Ms)
(loop
(NIL (wait Ms T Sd))
(T (accept Sd) @) ) )
# (host 'any) -> sym
(de host (Node)
(use Lst
(when (=0 (%@ "getaddrinfo" 'I Node 0 0 '(Lst (8 . P))))
(buf Host NI_MAXHOST
(prog1
(let P Lst
(loop
(T
(=0
(%@ "getnameinfo" 'I
(struct (+ P ai_addr) 'P)
(struct (+ P ai_addrlen) 'I)
Host
NI_MAXHOST
0 0
NI_NAMEREQD ) )
(struct Host 'S) )
(T
(=0 (setq P (struct (+ P ai_next) 'P))) ) ) )
(%@ "freeaddrinfo" 'I Lst) ) ) ) ) )
(private) server
(de server (Type Node Service)
(use Lst
(and
(=0
(%@ "getaddrinfo" 'I Node (pack Service)
(cons NIL (`addrinfo) # hints:
(0 . 4) # ai_flags
(`AF_UNSPEC . 4) # ai_family
(cons Type 4) # ai_socktype
0 ) # Clear rest
'(Lst (8 . P)) ) )
Lst ) ) )
# (connect 'any1 'any2) -> cnt | NIL
(de connect (Node Port)
(let? Lst (server SOCK_STREAM Node Port)
(prog1
(let (P Lst Sd)
(loop
(T
(and
(ge0
(setq Sd
(%@ "socket" 'I
(struct (+ P ai_family) 'I)
(struct (+ P ai_socktype) 'I)
0 ) ) )
(or
(=0
(%@ "connect" 'I Sd
(struct (+ P ai_addr) 'P)
(struct (+ P ai_addrlen) 'I) ) )
(nil (close Sd)) ) )
(%@ "closeOnExec" NIL (cons T (up)) Sd)
(%@ "initInFile" NIL Sd 0)
(%@ "initOutFile" NIL Sd)
Sd )
(T
(=0 (setq P (struct (+ P ai_next) 'P))) ) ) )
(%@ "freeaddrinfo" 'I Lst) ) ) )
(private) UDPMAX
(de UDPMAX . 4096)
# (udp 'cnt) -> any
# (udp 'sym 'any2 'any3) -> any
(de udp (X Port Val)
(buf Buf UDPMAX
(cond
(Port
(let? Lst (server SOCK_DGRAM X Port)
(let (P Lst N (plio Buf UDPMAX Val))
(loop
(T (=0 P)
(%@ "freeaddrinfo" 'I Lst)
NIL )
(T
(ge0
(%@ "socket" 'I
(struct (+ P ai_family) 'I)
(struct (+ P ai_socktype) 'I)
0 ) )
(%@ "sendto" 'I @ Buf N 0
(struct (+ P ai_addr) 'P)
(struct (+ P ai_addrlen) 'I) )
(close @)
(%@ "freeaddrinfo" 'I Lst)
Val )
(setq P (struct (+ P ai_next) 'P)) ) ) ) )
((ge0 (%@ "recv" 'N X Buf UDPMAX 0))
(plio Buf) ) ) ) )
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