;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; Part of the tcp/ip network stack for KolibriOS ;;
;; ;;
;; Written by hidnplayr@kolibrios.org, ;;
;; and Clevermouse. ;;
;; ;;
;; Based on code by mike.dld ;;
;; ;;
;; GNU GENERAL PUBLIC LICENSE ;;
;; Version 2, June 1991 ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision: 2957 $
struct SOCKET
NextPtr dd ? ; pointer to next socket in list
PrevPtr dd ? ; pointer to previous socket in list
Number dd ? ; socket number
mutex MUTEX
PID dd ? ; application process id
Domain dd ? ; INET/UNIX/..
Type dd ? ; RAW/STREAM/DGRAP
Protocol dd ? ; ICMP/IPv4/ARP/TCP/UDP
errorcode dd ?
device dd ?
options dd ?
state dd ?
backlog dw ? ; how many incomming connections that can be queued
snd_proc dd ?
rcv_proc dd ?
ends
struct IP_SOCKET SOCKET
LocalIP rd 4
RemoteIP rd 4
ends
struct TCP_SOCKET IP_SOCKET
LocalPort dw ?
RemotePort dw ?
t_state dd ? ; TCB state
t_rxtshift db ?
rb 3 ; align
t_rxtcur dd ?
t_dupacks dd ?
t_maxseg dd ?
t_force dd ?
t_flags dd ?
;---------------
; RFC783 page 21
; send sequence
SND_UNA dd ? ; sequence number of unack'ed sent Packets
SND_NXT dd ? ; next send sequence number to use
SND_UP dd ? ; urgent pointer
SND_WL1 dd ? ; window minus one
SND_WL2 dd ? ;
ISS dd ? ; initial send sequence number
SND_WND dd ? ; send window
; receive sequence
RCV_WND dd ? ; receive window
RCV_NXT dd ? ; next receive sequence number to use
RCV_UP dd ? ; urgent pointer
IRS dd ? ; initial receive sequence number
;---------------------
; Additional variables
; receive variables
RCV_ADV dd ?
; retransmit variables
SND_MAX dd ?
; congestion control
SND_CWND dd ?
SND_SSTHRESH dd ?
;----------------------
; Transmit timing stuff
t_idle dd ?
t_rtt dd ?
t_rtseq dd ?
t_srtt dd ?
t_rttvar dd ?
t_rttmin dd ?
max_sndwnd dd ?
;-----------------
; Out-of-band data
t_oobflags dd ?
t_iobc dd ?
t_softerror dd ?
;---------
; RFC 1323 ; the order of next 4 elements may not change
SND_SCALE db ?
RCV_SCALE db ?
requested_s_scale db ?
request_r_scale db ?
ts_recent dd ? ; a copy of the most-recent valid timestamp from the other end
ts_recent_age dd ?
last_ack_sent dd ?
;-------
; Timers
timer_retransmission dd ? ; rexmt
timer_persist dd ?
timer_keepalive dd ? ; keepalive/syn timeout
timer_timed_wait dd ? ; also used as 2msl timer
; extra
ts_ecr dd ? ; timestamp echo reply
ts_val dd ?
temp_bits db ?
ends
struct UDP_SOCKET IP_SOCKET
LocalPort dw ?
RemotePort dw ?
firstpacket db ?
ends
struct ICMP_SOCKET IP_SOCKET
Identifier dw ?
ends
struct RING_BUFFER
start_ptr dd ? ; Pointer to start of buffer
end_ptr dd ? ; pointer to end of buffer
read_ptr dd ? ; Read pointer
write_ptr dd ? ; Write pointer
size dd ? ; Number of bytes buffered
ends
struct STREAM_SOCKET TCP_SOCKET
rcv RING_BUFFER
snd RING_BUFFER
ends
struct socket_queue_entry
data_ptr dd ?
buf_ptr dd ?
data_size dd ?
ends
SOCKETBUFFSIZE = 4096 ; in bytes
SOCKET_QUEUE_SIZE = 10 ; maximum number ofincoming packets queued for 1 socket
; the incoming packet queue for sockets is placed in the socket struct itself, at this location from start
SOCKET_QUEUE_LOCATION = (SOCKETBUFFSIZE - SOCKET_QUEUE_SIZE*sizeof.socket_queue_entry - sizeof.queue)
uglobal
net_sockets rd 4
last_socket_num dd ?
last_UDP_port dw ? ; These values give the number of the last used ephemeral port
last_TCP_port dw ? ;
endg
;-----------------------------------------------------------------
;
; SOCKET_init
;
;-----------------------------------------------------------------
macro SOCKET_init {
xor eax, eax
mov edi, net_sockets
mov ecx, 5
rep stosd
@@:
pseudo_random eax
cmp ax, MIN_EPHEMERAL_PORT
jb @r
cmp ax, MAX_EPHEMERAL_PORT
ja @r
mov [last_UDP_port], ax
@@:
pseudo_random eax
cmp ax, MIN_EPHEMERAL_PORT
jb @r
cmp ax, MAX_EPHEMERAL_PORT
ja @r
mov [last_TCP_port], ax
}
;-----------------------------------------------------------------
;
; Socket API (function 74)
;
;-----------------------------------------------------------------
align 4
sys_socket:
cmp ebx, 255
jz SOCKET_debug
cmp ebx, .number
ja s_error
jmp dword [.table + 4*ebx]
.table:
dd SOCKET_open ; 0
dd SOCKET_close ; 1
dd SOCKET_bind ; 2
dd SOCKET_listen ; 3
dd SOCKET_connect ; 4
dd SOCKET_accept ; 5
dd SOCKET_send ; 6
dd SOCKET_receive ; 7
dd SOCKET_set_opt ; 8
dd SOCKET_get_opt ; 9
.number = ($ - .table) / 4 - 1
s_error:
DEBUGF 1,"socket error\n"
mov dword [esp+32], -1
ret
;-----------------------------------------------------------------
;
; SOCKET_open
;
; IN: domain in ecx
; type in edx
; protocol in esi
; OUT: eax is socket num, -1 on error
;
;-----------------------------------------------------------------
align 4
SOCKET_open:
DEBUGF 1,"SOCKET_open: domain=%u type=%u protocol=%x\n", ecx, edx, esi
push ecx edx esi
call SOCKET_alloc
pop esi edx ecx
jz s_error
mov [esp+32], edi ; return socketnumber
mov [eax + SOCKET.Domain], ecx
mov [eax + SOCKET.Type], edx
mov [eax + SOCKET.Protocol], esi
cmp ecx, AF_INET4
jne .no_inet4
cmp edx, SOCK_DGRAM
je .udp
cmp edx, SOCK_STREAM
je .tcp
cmp edx, SOCK_RAW
je .raw
.no_inet4:
cmp ecx, AF_PPP
jne .no_ppp
cmp esi, PPP_PROTO_ETHERNET
je .pppoe
.no_ppp:
ret
align 4
.raw:
test esi, esi ; IP_PROTO_IP
jz .ip
cmp esi, IP_PROTO_ICMP
je .icmp
cmp esi, IP_PROTO_UDP
je .udp
cmp esi, IP_PROTO_TCP
je .tcp
ret
align 4
.udp:
mov [eax + SOCKET.Protocol], IP_PROTO_UDP
mov [eax + SOCKET.snd_proc], SOCKET_send_udp
mov [eax + SOCKET.rcv_proc], SOCKET_receive_dgram
ret
align 4
.tcp:
mov [eax + SOCKET.Protocol], IP_PROTO_TCP
mov [eax + SOCKET.snd_proc], SOCKET_send_tcp
mov [eax + SOCKET.rcv_proc], SOCKET_receive_tcp
TCP_init_socket eax
ret
align 4
.ip:
mov [eax + SOCKET.snd_proc], SOCKET_send_ip
mov [eax + SOCKET.rcv_proc], SOCKET_receive_dgram
ret
align 4
.icmp:
mov [eax + SOCKET.snd_proc], SOCKET_send_icmp
mov [eax + SOCKET.rcv_proc], SOCKET_receive_dgram
ret
align 4
.pppoe:
push eax
init_queue (eax + SOCKET_QUEUE_LOCATION) ; Set up data receiving queue
pop eax
mov [eax + SOCKET.snd_proc], SOCKET_send_pppoe
mov [eax + SOCKET.rcv_proc], SOCKET_receive_dgram
ret
;-----------------------------------------------------------------
;
; SOCKET_bind
;
; IN: socket number in ecx
; pointer to sockaddr struct in edx
; length of that struct in esi
; OUT: 0 on success
;
;-----------------------------------------------------------------
align 4
SOCKET_bind:
DEBUGF 1,"SOCKET_bind: socknum=%u sockaddr=%x length=%u\n", ecx, edx, esi
call SOCKET_num_to_ptr
jz s_error
cmp esi, 2
jb s_error
cmp word [edx], AF_INET4
je .af_inet4
cmp word [edx], AF_UNIX
je .af_unix
jmp s_error
.af_unix:
; TODO: write code here
mov dword [esp+32], 0
ret
.af_inet4:
cmp esi, 6
jb s_error
cmp [eax + SOCKET.Protocol], IP_PROTO_UDP
je .udp
cmp [eax + SOCKET.Protocol], IP_PROTO_TCP
je .tcp
jmp s_error
.tcp:
.udp:
mov ebx, [edx + 4] ; First, fill in the IP
test ebx, ebx ; If IP is 0, use default
jnz @f
mov ebx, [NET_DEFAULT]
mov ebx, [IP_LIST + 4*ebx]
@@:
mov [eax + IP_SOCKET.LocalIP], ebx
mov bx, [edx + 2] ; Now fill in the port if it's still available
call SOCKET_check_port
jz s_error ; ZF is set by socket_check_port, on error
DEBUGF 1,"SOCKET_bind: local ip=%u.%u.%u.%u\n",\
[eax + IP_SOCKET.LocalIP + 0]:1,[eax + IP_SOCKET.LocalIP + 1]:1,\
[eax + IP_SOCKET.LocalIP + 2]:1,[eax + IP_SOCKET.LocalIP + 3]:1
mov dword [esp+32], 0
ret
;-----------------------------------------------------------------
;
; SOCKET_connect
;
; IN: socket number in ecx
; pointer to sockaddr struct in edx
; length of that struct in esi
; OUT: 0 on success
;
;-----------------------------------------------------------------
align 4
SOCKET_connect:
DEBUGF 1,"SOCKET_connect: socknum=%u sockaddr=%x length=%u\n", ecx, edx, esi
call SOCKET_num_to_ptr
jz s_error
cmp esi, 8
jb s_error
cmp word [edx], AF_INET4
je .af_inet4
jmp s_error
.af_inet4:
cmp [eax + IP_SOCKET.LocalIP], 0
jne @f
push [IP_LIST]
pop [eax + IP_SOCKET.LocalIP]
@@:
cmp [eax + SOCKET.Protocol], IP_PROTO_UDP
je .udp
cmp [eax + SOCKET.Protocol], IP_PROTO_TCP
je .tcp
cmp [eax + SOCKET.Protocol], IP_PROTO_IP
je .ip
cmp [eax + SOCKET.Protocol], IP_PROTO_ICMP
je .ip
jmp s_error
align 4
.udp:
pusha
lea ecx, [eax + SOCKET.mutex]
call mutex_lock
popa
pushw [edx + 2]
pop [eax + UDP_SOCKET.RemotePort]
pushd [edx + 4]
pop [eax + IP_SOCKET.RemoteIP]
cmp [eax + UDP_SOCKET.LocalPort], 0
jne @f
call SOCKET_find_port
@@:
mov [eax + UDP_SOCKET.firstpacket], 0
push eax
init_queue (eax + SOCKET_QUEUE_LOCATION) ; Set up data receiving queue
pop eax
lea ecx, [eax + SOCKET.mutex]
call mutex_unlock
mov dword [esp+32], 0
ret
align 4
.tcp:
pusha
lea ecx, [eax + SOCKET.mutex]
call mutex_lock
popa
pushw [edx + 2]
pop [eax + TCP_SOCKET.RemotePort]
pushd [edx + 4]
pop [eax + IP_SOCKET.RemoteIP]
cmp [eax + TCP_SOCKET.LocalPort], 0
jne @f
call SOCKET_find_port
@@:
mov [eax + TCP_SOCKET.timer_persist], 0
mov [eax + TCP_SOCKET.t_state], TCPS_SYN_SENT
push [TCP_sequence_num]
add [TCP_sequence_num], 6400
pop [eax + TCP_SOCKET.ISS]
mov [eax + TCP_SOCKET.timer_keepalive], TCP_time_keep_init
TCP_sendseqinit eax
; mov [ebx + TCP_SOCKET.timer_retransmission], ;; todo: create macro to set retransmission timer
mov ebx, eax
lea eax, [ebx + STREAM_SOCKET.snd]
call SOCKET_ring_create
lea eax, [ebx + STREAM_SOCKET.rcv]
call SOCKET_ring_create
pusha
lea ecx, [ebx + SOCKET.mutex]
call mutex_unlock
popa
mov eax, ebx
call TCP_output
mov dword [esp+32], 0
ret
align 4
.ip:
pusha
lea ecx, [eax + SOCKET.mutex]
call mutex_lock
popa
pushd [edx + 4]
pop [eax + IP_SOCKET.RemoteIP]
push eax
init_queue (eax + SOCKET_QUEUE_LOCATION) ; Set up data receiving queue
pop eax
lea ecx, [eax + SOCKET.mutex]
call mutex_unlock
mov dword [esp+32], 0
ret
;-----------------------------------------------------------------
;
; SOCKET_listen
;
; IN: socket number in ecx
; backlog in edx
; OUT: eax is socket num, -1 on error
;
;-----------------------------------------------------------------
align 4
SOCKET_listen:
DEBUGF 1,"SOCKET_listen: socknum=%u backlog=%u\n", ecx, edx
call SOCKET_num_to_ptr
jz s_error
cmp [eax + SOCKET.Domain], AF_INET4
jne s_error
cmp [eax + SOCKET.Protocol], IP_PROTO_TCP
jne s_error
cmp [eax + TCP_SOCKET.LocalPort], 0
je s_error
cmp [eax + IP_SOCKET.LocalIP], 0
jne @f
push [IP_LIST]
pop [eax + IP_SOCKET.LocalIP]
@@:
cmp edx, MAX_backlog
jbe @f
mov edx, MAX_backlog
@@:
mov [eax + SOCKET.backlog], dx
or [eax + SOCKET.options], SO_ACCEPTCON
mov [eax + TCP_SOCKET.t_state], TCPS_LISTEN
mov [eax + TCP_SOCKET.timer_keepalive], 0 ; disable keepalive timer
push eax
init_queue (eax + SOCKET_QUEUE_LOCATION) ; Set up sockets queue
pop eax
mov dword [esp+32], 0
ret
;-----------------------------------------------------------------
;
; SOCKET_accept
;
; IN: socket number in ecx
; addr in edx
; addrlen in esi
; OUT: eax is socket num, -1 on error
;
;-----------------------------------------------------------------
align 4
SOCKET_accept:
DEBUGF 1,"SOCKET_accept: socknum=%u sockaddr=%x length=%u\n", ecx, edx, esi
call SOCKET_num_to_ptr
jz s_error
test [eax + SOCKET.options], SO_ACCEPTCON
jz s_error
cmp [eax + SOCKET.Domain], AF_INET4
jne s_error
cmp [eax + SOCKET.Protocol], IP_PROTO_TCP
jne s_error
get_from_queue (eax + SOCKET_QUEUE_LOCATION), MAX_backlog, 4, s_error
mov eax, [esi]
; Change PID to that of the current process
mov ebx, [TASK_BASE]
mov ebx, [ebx + TASKDATA.pid]
mov [eax + SOCKET.PID], ebx
call SOCKET_ptr_to_num
jz s_error
mov [esp+32], eax
ret
;-----------------------------------------------------------------
;
; SOCKET_close
;
; IN: socket number in ecx
; OUT: eax is socket num, -1 on error
;
;-----------------------------------------------------------------
align 4
SOCKET_close:
DEBUGF 1,"SOCKET_close: %u\n", ecx
call SOCKET_num_to_ptr
jz s_error
cmp [eax + SOCKET.Domain], AF_INET4
jne s_error
cmp [eax + SOCKET.Protocol], IP_PROTO_UDP
je .free
cmp [eax + SOCKET.Protocol], IP_PROTO_ICMP
je .free
cmp [eax + SOCKET.Protocol], IP_PROTO_IP
je .free
cmp [eax + SOCKET.Protocol], IP_PROTO_TCP
je .tcp
jmp s_error
.tcp:
cmp [eax + TCP_SOCKET.t_state], TCPS_SYN_RECEIVED ; state must be LISTEN, SYN_SENT or CLOSED
jb .free
call TCP_usrclosed
call TCP_output ;;;; Fixme: is this nescessary??
mov dword [esp+32], 0
ret
.free:
call SOCKET_free
mov dword [esp+32], 0
ret
;-----------------------------------------------------------------
;
; SOCKET_receive
;
; IN: socket number in ecx
; addr to buffer in edx
; length of buffer in esi
; flags in edi
; OUT: eax is number of bytes copied, -1 on error
;
;-----------------------------------------------------------------
align 4
SOCKET_receive:
DEBUGF 1,"SOCKET_receive: socknum=%u bufaddr=%x buflength=%u flags=%x\n", ecx, edx, esi, edi
call SOCKET_num_to_ptr
jz s_error
jmp [eax + SOCKET.rcv_proc]
align 4
SOCKET_receive_dgram:
DEBUGF 1,"SOCKET_receive: DGRAM\n"
mov ebx, esi
mov edi, edx ; addr to buffer
get_from_queue (eax + SOCKET_QUEUE_LOCATION), SOCKET_QUEUE_SIZE, sizeof.socket_queue_entry, s_error ; destroys esi and ecx
mov ecx, [esi + socket_queue_entry.data_size]
DEBUGF 1,"SOCKET_receive: %u bytes data\n", ecx
cmp ecx, ebx
ja .too_small
push [esi + socket_queue_entry.buf_ptr] ; save the buffer addr so we can clear it later
mov esi, [esi + socket_queue_entry.data_ptr]
DEBUGF 1,"SOCKET_receive: Source buffer=%x real addr=%x\n", [esp], esi
mov [esp+32+4], ecx ; return number of bytes copied
; copy the data
shr ecx, 1
jnc .nb
movsb
.nb:
shr ecx, 1
jnc .nw
movsw
.nw:
test ecx, ecx
jz .nd
rep movsd
.nd:
call kernel_free ; remove the packet
ret
.too_small:
DEBUGF 1,"SOCKET_receive: Buffer too small\n"
jmp s_error
align 4
SOCKET_receive_tcp:
DEBUGF 1,"SOCKET_receive: TCP\n"
mov ecx, esi
mov edi, edx
add eax, STREAM_SOCKET.rcv
xor edx, edx
call SOCKET_ring_read
call SOCKET_ring_free
mov [esp+32], ecx ; return number of bytes copied
ret
;-----------------------------------------------------------------
;
; SOCKET_send
;
;
; IN: socket number in ecx
; pointer to data in edx
; datalength in esi
; flags in edi
; OUT: -1 on error
;
;-----------------------------------------------------------------
align 4
SOCKET_send:
DEBUGF 1,"SOCKET_send: socknum=%u data ptr=%x length=%u flags=%x\n", ecx, edx, esi, edi
call SOCKET_num_to_ptr
jz s_error
mov ecx, esi
mov esi, edx
jmp [eax + SOCKET.snd_proc]
align 4
SOCKET_send_udp:
DEBUGF 1,"SOCKET_send: UDP\n"
mov [esp+32], ecx
call UDP_output
cmp eax, -1
je s_error
ret
align 4
SOCKET_send_tcp:
DEBUGF 1,"SOCKET_send: TCP\n"
push eax
add eax, STREAM_SOCKET.snd
call SOCKET_ring_write
pop eax
mov [esp+32], ecx
call TCP_output
ret
align 4
SOCKET_send_ip:
DEBUGF 1,"SOCKET_send: IPv4\n"
mov [esp+32], ecx
call IPv4_output_raw
cmp eax, -1
je s_error
ret
align 4
SOCKET_send_icmp:
DEBUGF 1,"SOCKET_send: ICMP\n"
mov [esp+32], ecx
call ICMP_output_raw
cmp eax, -1
je s_error
ret
align 4
SOCKET_send_pppoe:
DEBUGF 1,"SOCKET_send: PPPoE\n"
mov [esp+32], ecx
mov ebx, [eax + SOCKET.device]
call PPPoE_discovery_output
cmp eax, -1
je s_error
ret
;-----------------------------------------------------------------
;
; SOCKET_get_options
;
; IN: ecx = socket number
; edx = pointer to the options:
; dd level, optname, optval, optlen
; OUT: -1 on error
;
; At moment, uses only pseudo-optname -2 for get last_ack_number for TCP.
; TODO: find best way to notify that send()'ed data were acknowledged
; Also pseudo-optname -3 is valid and returns socket state, one of TCPS_*.
;
;-----------------------------------------------------------------
align 4
SOCKET_get_opt:
DEBUGF 1,"SOCKET_get_opt\n"
call SOCKET_num_to_ptr
jz s_error
cmp dword [edx], IP_PROTO_TCP
jne s_error
cmp dword [edx+4], -2
je @f
cmp dword [edx+4], -3
jne s_error
@@:
; mov eax, [edx+12]
; test eax, eax
; jz .fail
; cmp dword [eax], 4
; mov dword [eax], 4
; jb .fail
; stdcall net_socket_num_to_addr, ecx
; test eax, eax
; jz .fail
; ; todo: check that eax is really TCP socket
; mov ecx, [eax + TCP_SOCKET.last_ack_number]
; cmp dword [edx+4], -2
; jz @f
; mov ecx, [eax + TCP_SOCKET.state]
@@:
mov eax, [edx+8]
test eax, eax
jz @f
mov [eax], ecx
@@:
mov dword [esp+32], 0
ret
;-----------------------------------------------------------------
;
; SOCKET_set_options
;
; IN: ecx = socket number
; edx = pointer to the options:
; dd level, optname, optlen, optval
; OUT: -1 on error
;
;-----------------------------------------------------------------
align 4
SOCKET_set_opt:
DEBUGF 1,"SOCKET_set_opt\n"
call SOCKET_num_to_ptr
jz s_error
cmp dword [edx], SOL_SOCKET
jne s_error
cmp dword [edx+4], SO_BINDTODEVICE
je .bind
jmp s_error
.bind:
cmp dword [edx+8], 0
je .unbind
movzx edx, byte [edx + 9]
cmp edx, MAX_NET_DEVICES
ja s_error
mov edx, [NET_DRV_LIST + 4*edx]
test edx, edx
jz s_error
mov [eax + SOCKET.device], edx
DEBUGF 1,"SOCKET_set_opt: Bound socket %x to device %x\n",eax, edx
mov dword [esp+32], 0 ; success!
ret
.unbind:
mov [eax + SOCKET.device], 0
mov dword [esp+32], 0 ; success!
ret
;-----------------------------------------------------------------
;
; SOCKET_debug
;
; Copies socket variables to application buffer
;
; IN: ecx = socket number
; edx = pointer to buffer
;
; OUT: -1 on error
;-----------------------------------------------------------------
align 4
SOCKET_debug:
DEBUGF 1,"SOCKET_debug\n"
call SOCKET_num_to_ptr
jz s_error
mov esi, eax
mov edi, edx
mov ecx, SOCKETBUFFSIZE/4
rep movsd
mov dword [esp+32], 0
ret
;-----------------------------------------------------------------
;
; SOCKET_find_port
;
; Fills in the local port number for TCP and UDP sockets
; This procedure always works because the number of sockets is
; limited to a smaller number then the number of possible ports
;
; IN: eax = socket pointer
; OUT: /
;
;-----------------------------------------------------------------
align 4
SOCKET_find_port:
DEBUGF 1,"SOCKET_find_port\n"
push ebx esi ecx
cmp [eax + SOCKET.Protocol], IP_PROTO_UDP
je .udp
cmp [eax + SOCKET.Protocol], IP_PROTO_TCP
je .tcp
jmp .error
.done:
mov [eax + UDP_SOCKET.LocalPort], bx
.error:
pop ecx esi ebx
ret
.udp:
mov bx, [last_UDP_port]
call .findit
mov [last_UDP_port], bx
jmp .done
.tcp:
mov bx, [last_TCP_port]
call .findit
mov [last_TCP_port], bx
jmp .done
.restart:
mov bx, MIN_EPHEMERAL_PORT
.findit:
inc bx
cmp bx, MAX_EPHEMERAL_PORT
jz .restart
call SOCKET_check_port
jz .findit
ret
;-----------------------------------------------------------------
;
; SOCKET_check_port (to be used with AF_INET only!)
;
; Checks if a local port number is unused
; If the proposed port number is unused, it is filled in in the socket structure
;
; IN: eax = socket ptr (to find out if its a TCP/UDP socket)
; bx = proposed socket number
;
; OUT: ZF = cleared on error
;
;-----------------------------------------------------------------
align 4
SOCKET_check_port:
DEBUGF 1,"SOCKET_check_port: "
mov ecx, [eax + SOCKET.Protocol]
mov edx, [eax + IP_SOCKET.LocalIP]
mov esi, net_sockets
.next_socket:
mov esi, [esi + SOCKET.NextPtr]
or esi, esi
jz .port_ok
cmp [esi + SOCKET.Protocol], ecx
jne .next_socket
cmp [esi + IP_SOCKET.LocalIP], edx
jne .next_socket
cmp [esi + UDP_SOCKET.LocalPort], bx
jne .next_socket
DEBUGF 1,"local port %u already in use\n", bx
ret
.port_ok:
DEBUGF 1,"local port %u is free\n", bx
mov [eax + UDP_SOCKET.LocalPort], bx
or bx, bx ; set the zero-flag
ret
;-----------------------------------------------------------------
;
; SOCKET_input
;
; Updates a (stateless) socket with received data
;
; Note: the mutex should already be set !
;
; IN: eax = socket ptr
; ecx = data size
; esi = ptr to data
; [esp] = ptr to buf
; [esp + 4] = buf size
;
; OUT: /
;
;-----------------------------------------------------------------
align 4
SOCKET_input:
DEBUGF 1,"SOCKET_input: socket=%x, data=%x size=%u\n", eax, esi, ecx
mov [esp+4], ecx
push esi
mov esi, esp
add_to_queue (eax + SOCKET_QUEUE_LOCATION), SOCKET_QUEUE_SIZE, sizeof.socket_queue_entry, SOCKET_input.full
DEBUGF 1,"SOCKET_input: queued packet successfully\n"
add esp, sizeof.socket_queue_entry
pusha
lea ecx, [eax + SOCKET.mutex]
call mutex_unlock
popa
jmp SOCKET_notify_owner
.full:
DEBUGF 2,"SOCKET_input: socket %x is full!\n", eax
pusha
lea ecx, [eax + SOCKET.mutex]
call mutex_unlock
popa
call kernel_free
add esp, 8
ret
;--------------------------
;
; eax = ptr to ring struct (just a buffer of the right size)
;
align 4
SOCKET_ring_create:
push esi
mov esi, eax
push edx
stdcall create_ring_buffer, SOCKET_MAXDATA, PG_SW
pop edx
DEBUGF 1,"SOCKET_ring_created: %x\n", eax
mov [esi + RING_BUFFER.start_ptr], eax
mov [esi + RING_BUFFER.write_ptr], eax
mov [esi + RING_BUFFER.read_ptr], eax
mov [esi + RING_BUFFER.size], 0
add eax, SOCKET_MAXDATA
mov [esi + RING_BUFFER.end_ptr], eax
mov eax, esi
pop esi
ret
;-----------------------------------------------------------------
;
; SOCKET_ring_write
;
; Adds data to a stream socket, and updates write pointer and size
;
; IN: eax = ptr to ring struct
; ecx = data size
; esi = ptr to data
;
; OUT: ecx = number of bytes stored
;
;-----------------------------------------------------------------
align 4
SOCKET_ring_write:
DEBUGF 1,"SOCKET_ring_write: ringbuff=%x ptr=%x size=%u\n", eax, esi, ecx
add [eax + RING_BUFFER.size], ecx
jc .way_too_large
cmp [eax + RING_BUFFER.size], SOCKET_MAXDATA
ja .too_large
.copy:
mov edi, [eax + RING_BUFFER.write_ptr]
DEBUGF 2,"SOCKET_ring_write: %u bytes from %x to %x\n", ecx, esi, edi
push ecx
shr ecx, 1
jnc .nb
movsb
.nb:
shr ecx, 1
jnc .nw
movsw
.nw:
test ecx, ecx
jz .nd
rep movsd
.nd:
pop ecx
cmp edi, [eax + RING_BUFFER.end_ptr]
jae .wrap
mov [eax + RING_BUFFER.write_ptr], edi
ret
.wrap:
sub edi, SOCKET_MAXDATA
mov [eax + RING_BUFFER.write_ptr], edi
ret
.too_large: ; update size, we will fill buffer completely
sub [eax + RING_BUFFER.size], SOCKET_MAXDATA
sub ecx, [eax + RING_BUFFER.size]
mov [eax + RING_BUFFER.size], SOCKET_MAXDATA
ja .copy
.full:
DEBUGF 2,"SOCKET_ring_write: ring buffer is full!\n"
xor ecx, ecx
ret
.way_too_large:
sub [eax + RING_BUFFER.size], ecx
mov ecx, SOCKET_MAXDATA
sub ecx, [eax + RING_BUFFER.size]
ja .copy
jmp .full
;-----------------------------------------------------------------
;
; SOCKET_ring_read
;
; IN: eax = ring struct ptr
; ecx = bytes to read
; edx = offset
; edi = ptr to buffer
;
; OUT: ecx = number of bytes read (0 on error)
;
;-----------------------------------------------------------------
align 4
SOCKET_ring_read:
DEBUGF 1,"SOCKET_ring_read: ringbuff=%x ptr=%x size=%u offset=%x\n", eax, edi, ecx, edx
mov esi, [eax + RING_BUFFER.read_ptr]
add esi, edx ; esi = start_ptr + offset
neg edx
add edx, [eax + RING_BUFFER.size] ; edx = snd.size - offset
jle .no_data_at_all
cmp ecx, edx
ja .less_data
.copy:
DEBUGF 2,"SOCKET_ring_read: %u bytes from %x to %x\n", ecx, esi, edi
push ecx
shr ecx, 1
jnc .nb
movsb
.nb:
shr ecx, 1
jnc .nw
movsw
.nw:
test ecx, ecx
jz .nd
rep movsd
.nd:
pop ecx
ret
.no_data_at_all:
DEBUGF 1,"SOCKET_ring_read: no data at all!\n"
ret
.less_data:
mov ecx, edx
jmp .copy
;-----------------------------------------------------------------
;
; SOCKET_ring_free
;
; Free's some bytes from the ringbuffer
;
; IN: eax = ptr to ring struct
; ecx = data size
;
; OUT: ecx = number of bytes free-ed
;
;-----------------------------------------------------------------
align 4
SOCKET_ring_free:
DEBUGF 1,"SOCKET_ring_free: %u bytes from ring %x\n", ecx, eax
sub [eax + RING_BUFFER.size], ecx
jb .error
add [eax + RING_BUFFER.read_ptr], ecx
mov edx, [eax + RING_BUFFER.end_ptr]
cmp [eax + RING_BUFFER.read_ptr], edx
jb @f
sub [eax + RING_BUFFER.read_ptr], SOCKET_MAXDATA
@@:
ret
.error: ; we could free all available bytes, but that would be stupid, i guess..
DEBUGF 1,"SOCKET_ring_free: buffer=%x error!\n", eax
add [eax + RING_BUFFER.size], ecx
xor ecx, ecx
ret
;-----------------------------------------------------------------
;
; SOCKET_notify_owner
;
; notify's the owner of a socket that something happened
;
; IN: eax = socket ptr
; OUT: /
;
;-----------------------------------------------------------------
align 4
SOCKET_notify_owner:
DEBUGF 1,"SOCKET_notify_owner: %x\n", eax
call SOCKET_check
jz .error
push eax ecx esi
; socket exists, now try to flag an event to the application
mov eax, [eax + SOCKET.PID]
test eax, eax
jz .error2
mov ecx, 1
mov esi, TASK_DATA + TASKDATA.pid
.next_pid:
cmp [esi], eax
je .found_pid
inc ecx
add esi, 0x20
cmp ecx, [TASK_COUNT]
jbe .next_pid
; PID not found, TODO: close socket!
jmp .error2
.found_pid:
shl ecx, 8
or [ecx + SLOT_BASE + APPDATA.event_mask], EVENT_NETWORK
mov [check_idle_semaphore], 200
DEBUGF 1,"SOCKET_notify_owner: succes!\n"
.error2:
pop esi ecx eax
.error:
ret
;--------------------------------------------------------------------
;
; SOCKET_alloc
;
; Allocate memory for socket data and put new socket into the list
; Newly created socket is initialized with calling PID and number and
; put into beginning of list (which is a fastest way).
;
; IN: /
; OUT: eax = 0 on error, socket ptr otherwise
; edi = socket number
; ZF = cleared on error
;
;--------------------------------------------------------------------
align 4
SOCKET_alloc:
push ebx
stdcall kernel_alloc, SOCKETBUFFSIZE
DEBUGF 1, "SOCKET_alloc: ptr=%x\n", eax
or eax, eax
jz .exit
; zero-initialize allocated memory
push eax
mov edi, eax
mov ecx, SOCKETBUFFSIZE / 4
xor eax, eax
rep stosd
pop eax
; set send-and receive procedures to return -1
mov [eax + SOCKET.snd_proc], s_error
mov [eax + SOCKET.rcv_proc], s_error
; find first free socket number and use it
mov edi, [last_socket_num]
.next_socket_number:
inc edi
jz .next_socket_number ; avoid socket nr 0
cmp edi, -1
je .next_socket_number ; avoid socket nr -1
mov ebx, net_sockets
.next_socket:
mov ebx, [ebx + SOCKET.NextPtr]
test ebx, ebx
jz .last_socket
cmp [ebx + SOCKET.Number], edi
jne .next_socket
jmp .next_socket_number
.last_socket:
mov [last_socket_num], edi
mov [eax + SOCKET.Number], edi
DEBUGF 1, "SOCKET_alloc: number=%u\n", edi
; Fill in PID
mov ebx, [TASK_BASE]
mov ebx, [ebx + TASKDATA.pid]
mov [eax + SOCKET.PID], ebx
; init mutex
pusha
lea ecx, [eax + SOCKET.mutex]
call mutex_init
popa
; add socket to the list by re-arranging some pointers
mov ebx, [net_sockets + SOCKET.NextPtr]
mov [eax + SOCKET.PrevPtr], net_sockets
mov [eax + SOCKET.NextPtr], ebx
test ebx, ebx
jz @f
pusha
lea ecx, [ebx + SOCKET.mutex]
call mutex_lock
popa
mov [ebx + SOCKET.PrevPtr], eax
pusha
lea ecx, [ebx + SOCKET.mutex]
call mutex_unlock
popa
@@:
mov [net_sockets + SOCKET.NextPtr], eax
or eax, eax ; used to clear zero flag
.exit:
pop ebx
ret
;----------------------------------------------------
;
; SOCKET_free
;
; Free socket data memory and remove socket from the list
;
; IN: eax = socket ptr
; OUT: /
;
;----------------------------------------------------
align 4
SOCKET_free:
DEBUGF 1, "SOCKET_free: %x\n", eax
call SOCKET_check
jz .error
push ebx
pusha
lea ecx, [eax + SOCKET.mutex]
call mutex_lock
popa
cmp [eax + SOCKET.Domain], AF_INET4
jnz .no_tcp
cmp [eax + SOCKET.Protocol], IP_PROTO_TCP
jnz .no_tcp
mov ebx, eax
stdcall kernel_free, [ebx + STREAM_SOCKET.rcv.start_ptr]
stdcall kernel_free, [ebx + STREAM_SOCKET.snd.start_ptr]
mov eax, ebx
.no_tcp:
push eax ; this will be passed to kernel_free
mov ebx, [eax + SOCKET.NextPtr]
mov eax, [eax + SOCKET.PrevPtr]
DEBUGF 1, "SOCKET_free: linking socket %x to socket %x\n", eax, ebx
test eax, eax
jz @f
mov [eax + SOCKET.NextPtr], ebx
@@:
test ebx, ebx
jz @f
mov [ebx + SOCKET.PrevPtr], eax
@@:
call kernel_free
pop ebx
DEBUGF 1, "SOCKET_free: success!\n"
.error:
ret
;------------------------------------
;
; SOCKET_fork
;
; Create a child socket
;
; IN: socket nr in ebx
; OUT: child socket nr in eax
;
;-----------------------------------
align 4
SOCKET_fork:
DEBUGF 1,"SOCKET_fork: %x\n", ebx
; Exit if backlog queue is full
mov eax, [ebx + SOCKET_QUEUE_LOCATION + queue.size]
cmp ax, [ebx + SOCKET.backlog]
jae .fail
; Allocate new socket
push ebx
call SOCKET_alloc
pop ebx
jz .fail
push eax
mov esi, esp
add_to_queue (ebx + SOCKET_QUEUE_LOCATION), MAX_backlog, 4, .fail2
pop eax
; Copy structure from current socket to new
; We start at PID to preserve the socket num, and the 2 pointers at beginning of socket
lea esi, [ebx + SOCKET.PID]
lea edi, [eax + SOCKET.PID]
mov ecx, (SOCKET_QUEUE_LOCATION - SOCKET.PID + 3)/4
rep movsd
and [eax + SOCKET.options], not SO_ACCEPTCON
ret
.fail2:
add esp, 4+4+4
.fail:
DEBUGF 1,"SOCKET_fork: failed\n"
xor eax, eax
ret
;---------------------------------------------------
;
; SOCKET_num_to_ptr
;
; Get socket structure address by its number
;
; IN: ecx = socket number
; OUT: eax = 0 on error, socket ptr otherwise
; ZF = set on error
;
;---------------------------------------------------
align 4
SOCKET_num_to_ptr:
DEBUGF 1,"SOCKET_num_to_ptr: num=%u ", ecx
mov eax, net_sockets
.next_socket:
mov eax, [eax + SOCKET.NextPtr]
or eax, eax
jz .error
cmp [eax + SOCKET.Number], ecx
jne .next_socket
test eax, eax
DEBUGF 1,"ptr=%x\n", eax
ret
.error:
DEBUGF 1,"not found\n", eax
ret
;---------------------------------------------------
;
; SOCKET_ptr_to_num
;
; Get socket number by its address
;
; IN: eax = socket ptr
; OUT: eax = 0 on error, socket num otherwise
; ZF = set on error
;
;---------------------------------------------------
align 4
SOCKET_ptr_to_num:
DEBUGF 1,"SOCKET_ptr_to_num: ptr=%x ", eax
call SOCKET_check
jz .error
mov eax, [eax + SOCKET.Number]
DEBUGF 1,"num=%u\n", eax
ret
.error:
DEBUGF 1,"not found\n", eax
ret
;---------------------------------------------------
;
; SOCKET_check
;
; checks if the given value is really a socket ptr
;
; IN: eax = socket ptr
; OUT: eax = 0 on error, unchanged otherwise
; ZF = set on error
;
;---------------------------------------------------
align 4
SOCKET_check:
DEBUGF 1,"SOCKET_check: %x\n", eax
push ebx
mov ebx, net_sockets
.next_socket:
mov ebx, [ebx + SOCKET.NextPtr]
or ebx, ebx
jz .done
cmp ebx, eax
jnz .next_socket
.done:
mov eax, ebx
test eax, eax
pop ebx
ret
;---------------------------------------------------
;
; SOCKET_check_owner
;
; checks if the caller application owns the socket
;
; IN: eax = socket ptr
; OUT: ZF = true/false
;
;---------------------------------------------------
align 4
SOCKET_check_owner:
DEBUGF 1,"SOCKET_check_owner: %x\n", eax
push ebx
mov ebx, [TASK_BASE]
mov ebx, [ecx + TASKDATA.pid]
cmp [eax + SOCKET.PID], ebx
pop ebx
ret
;------------------------------------------------------
;
; SOCKET_process_end
;
; Kernel calls this function when a certain process ends
; This function will check if the process had any open sockets
; And update them accordingly
;
; IN: edx = pid
; OUT: /
;
;------------------------------------------------------
align 4
SOCKET_process_end:
DEBUGF 1,"SOCKET_process_end: %x\n", edx
push ebx
mov ebx, net_sockets
.next_socket:
mov ebx, [ebx + SOCKET.NextPtr]
.test_socket:
test ebx, ebx
jz .done
cmp [ebx + SOCKET.PID], edx
jne .next_socket
DEBUGF 1,"SOCKET_process_end: killing socket %x\n", ebx
mov [ebx + SOCKET.PID], 0
cmp [ebx + SOCKET.Protocol], IP_PROTO_TCP
je .tcp
; The socket is stateless, just kill it right away!
mov eax, ebx
mov ebx, [ebx + SOCKET.NextPtr]
call SOCKET_free
jmp .test_socket
.tcp:
push [ebx + SOCKET.NextPtr]
mov eax, ebx
call TCP_disconnect
pop ebx
jmp .test_socket
.done:
pop ebx
ret
;-----------------------------------------------------------------
;
; SOCKET_is_connecting
;
; IN: eax = socket ptr
; OUT: /
;
;-----------------------------------------------------------------
align 4
SOCKET_is_connecting:
DEBUGF 1,"SOCKET_is_connecting: %x\n", eax
and [eax + SOCKET.options], not (SS_ISCONNECTED + SS_ISDISCONNECTING + SS_ISCONFIRMING)
or [eax + SOCKET.options], SS_ISCONNECTING
jmp SOCKET_notify_owner
;-----------------------------------------------------------------
;
; SOCKET_is_connected
;
; IN: eax = socket ptr
; OUT: /
;
;-----------------------------------------------------------------
align 4
SOCKET_is_connected:
DEBUGF 1,"SOCKET_is_connected: %x\n", eax
and [eax + SOCKET.options], not (SS_ISCONNECTING + SS_ISDISCONNECTING + SS_ISCONFIRMING)
or [eax + SOCKET.options], SS_ISCONNECTED
jmp SOCKET_notify_owner
;-----------------------------------------------------------------
;
; SOCKET_is_disconnecting
;
; IN: eax = socket ptr
; OUT: /
;
;-----------------------------------------------------------------
align 4
SOCKET_is_disconnecting:
DEBUGF 1,"SOCKET_is_disconnecting: %x\n", eax
and [eax + SOCKET.options], not (SS_ISCONNECTING)
or [eax + SOCKET.options], SS_ISDISCONNECTING + SS_CANTRCVMORE + SS_CANTSENDMORE
jmp SOCKET_notify_owner
;-----------------------------------------------------------------
;
; SOCKET_is_disconnected
;
; IN: eax = socket ptr
; OUT: /
;
;-----------------------------------------------------------------
align 4
SOCKET_is_disconnected:
DEBUGF 1,"SOCKET_is_disconnected: %x\n", eax
and [eax + SOCKET.options], not (SS_ISCONNECTING + SS_ISCONNECTED + SS_ISDISCONNECTING)
or [eax + SOCKET.options], SS_CANTRCVMORE + SS_CANTSENDMORE
jmp SOCKET_notify_owner
;-----------------------------------------------------------------
;
; SOCKET_cant_recv_more
;
; IN: eax = socket ptr
; OUT: /
;
;-----------------------------------------------------------------
align 4
SOCKET_cant_recv_more:
DEBUGF 1,"SOCKET_cant_recv_more: %x\n", eax
or [eax + SOCKET.options], SS_CANTRCVMORE
ret
;-----------------------------------------------------------------
;
; SOCKET_cant_send_more
;
; IN: eax = socket ptr
; OUT: /
;
;-----------------------------------------------------------------
align 4
SOCKET_cant_send_more:
DEBUGF 1,"SOCKET_cant_send_more: %x\n", eax
or [eax + SOCKET.options], SS_CANTSENDMORE
ret