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net: socket error handling

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This commit is contained in:
Justice Suh 2019-07-19 23:51:45 -04:00 committed by Alexander Medvednikov
parent 2291e9fcfe
commit d72c859bf9
3 changed files with 93 additions and 86 deletions
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136
vlib/net/socket.v
View File

@ -24,7 +24,6 @@ import const (
SD_BOTH
)
// used for WinSock init
struct C.WSAData {
mut:
wVersion u16
@ -36,6 +35,14 @@ mut:
lpVendorInfo byteptr
}
const (
WSA_V1 = 0x100 // C.MAKEWORD(1, 0)
WSA_V11 = 0x101 // C.MAKEWORD(1, 1)
WSA_V2 = 0x200 // C.MAKEWORD(2, 0)
WSA_V21 = 0x201 // C.MAKEWORD(2, 1)
WSA_V22 = 0x202 // C.MAKEWORD(2, 2)
)
struct C.in_addr {
mut:
s_addr int
@ -62,14 +69,19 @@ mut:
struct C.sockaddr_storage {}
// create socket
pub fn socket(family int, _type int, proto int) Socket {
pub fn socket(family int, _type int, proto int) ?Socket {
$if windows {
mut wsadata := C.WSAData{}
res := C.WSAStartup(0x202, &wsadata)
// TODO: throw error if WSAStartup fails
res := C.WSAStartup(WSA_V22, &wsadata)
if res != 0 {
return error('socket: WSAStartup failed')
}
}
sockfd := C.socket(family, _type, proto)
if sockfd == 0 {
return error('socket: init failed')
}
s := Socket {
sockfd: sockfd
family: family
@ -80,66 +92,72 @@ pub fn socket(family int, _type int, proto int) Socket {
}
// set socket options
pub fn (s Socket) setsockopt(level int, optname int, optvalue *int) int {
pub fn (s Socket) setsockopt(level int, optname int, optvalue *int) ?int {
res := C.setsockopt(s.sockfd, level, optname, optvalue, C.sizeof(optvalue))
return res
if res < 0 {
return error('socket: setsockopt failed')
}
return int(res)
}
// bind socket to port
pub fn (s Socket) bind(port int) int {
pub fn (s Socket) bind(port int) ?int {
mut addr := C.sockaddr_in{}
addr.sin_family = s.family
addr.sin_port = C.htons(port)
addr.sin_addr.s_addr = C.htonl(INADDR_ANY)
size := 16 // sizeof(C.sockaddr_in)
res := C.bind(s.sockfd, &addr, size)
return res
if res < 0 {
return error('socket: bind failed')
}
return int(res)
}
// put socket into passive mode and wait to receive
pub fn (s Socket) listen() int {
pub fn (s Socket) listen() ?int {
backlog := 128
res := C.listen(s.sockfd, backlog)
return res
if res < 0 {
return error('socket: listen failed')
}
return int(res)
}
// put socket into passive mode with user specified backlog and wait to receive
pub fn (s Socket) listen_backlog(backlog int) int {
pub fn (s Socket) listen_backlog(backlog int) ?int {
mut n := 0
if backlog > 0 {
n = backlog
}
res := C.listen(s.sockfd, n)
return res
if res < 0 {
return error('socket: listen_backlog failed')
}
return int(res)
}
// helper method to create, bind, and listen given port number
pub fn listen(port int) Socket {
s := socket(AF_INET, SOCK_STREAM, 0)
if s.sockfd == 0 {
println('socket: init socket failed')
return s
pub fn listen(port int) ?Socket {
s := socket(AF_INET, SOCK_STREAM, 0) or {
return error(err)
}
bind_res := s.bind(port)
if bind_res < 0 {
println('socket: bind failed')
return s
bind_res := s.bind(port) or {
return error(err)
}
listen_res := s.listen()
if listen_res < 0 {
println('socket: listen failed')
return s
listen_res := s.listen() or {
return error(err)
}
return s
}
// accept first connection request from socket queue
pub fn (s Socket) accept() Socket {
pub fn (s Socket) accept() ?Socket {
addr := C.sockaddr_storage{}
size := 128 // sizeof(sockaddr_storage)
sockfd := C.accept(s.sockfd, &addr, &size)
if sockfd < 0 {
println('socket: accept failed')
return error('socket: accept failed')
}
c := Socket {
sockfd: sockfd
@ -151,7 +169,7 @@ pub fn (s Socket) accept() Socket {
}
// connect to given addrress and port
pub fn (s Socket) connect(address string, port int) int {
pub fn (s Socket) connect(address string, port int) ?int {
mut hints := C.addrinfo{}
hints.ai_family = AF_UNSPEC
hints.ai_socktype = SOCK_STREAM
@ -161,20 +179,22 @@ pub fn (s Socket) connect(address string, port int) int {
sport := '$port'
info_res := C.getaddrinfo(address.str, sport.str, &hints, &info)
if info_res != 0 {
println('socket: getaddrinfo failed')
return info_res
return error('socket: connect failed')
}
res := C.connect(s.sockfd, info.ai_addr, info.ai_addrlen)
return res
if res < 0 {
return error('socket: connect failed')
}
return int(res)
}
// helper method to create socket and connect
pub fn dial(address string, port int) Socket {
s := socket(AF_INET, SOCK_STREAM, 0)
res := s.connect(address, port)
if res < 0 {
println('socket: failed to connect')
pub fn dial(address string, port int) ?Socket {
s := socket(AF_INET, SOCK_STREAM, 0) or {
return error(err)
}
res := s.connect(address, port) or {
return error(err)
}
return s
}
@ -182,9 +202,9 @@ pub fn dial(address string, port int) Socket {
// send string data to socket
pub fn (s Socket) send(buf byteptr, len int) int {
res := C.send(s.sockfd, buf, len, 0)
if res < 0 {
println('socket: send failed')
}
// if res < 0 {
// return error('socket: send failed')
// }
return res
}
@ -192,43 +212,41 @@ pub fn (s Socket) send(buf byteptr, len int) int {
pub fn (s Socket) recv(bufsize int) byteptr {
buf := malloc(bufsize)
res := C.recv(s.sockfd, buf, bufsize, 0)
if res < 0 {
println('socket: recv failed')
}
// if res < 0 {
// return error('socket: recv failed')
// }
return buf
}
// shutdown and close socket
pub fn (s Socket) close() int {
pub fn (s Socket) close() ?int {
// WinSock
$if windows {
C.WSACleanup()
}
mut shutdown_res := 0
$if windows {
shutdown_res := C.shutdown(s.sockfd, SD_BOTH)
if shutdown_res < 0 {
println('socket: shutdown failed')
}
shutdown_res = C.shutdown(s.sockfd, SD_BOTH)
}
$else {
shutdown_res := C.shutdown(s.sockfd, SHUT_RDWR)
if shutdown_res < 0 {
println('socket: shutdown failed')
}
shutdown_res = C.shutdown(s.sockfd, SHUT_RDWR)
}
// TODO: should shutdown throw an error? close will
// continue even if shutdown failed
// if shutdown_res < 0 {
// return error('socket: shutdown failed')
// }
mut res := 0
$if windows {
res := C.closesocket(s.sockfd)
if res < 0 {
println('socket: close failed')
}
res = C.closesocket(s.sockfd)
}
$else {
res := C.close(s.sockfd)
if res < 0 {
println('socket: close failed')
res = C.close(s.sockfd)
}
if res < 0 {
return error('socket: close failed')
}
return 0

21
vlib/net/socket_test.v
View File

@ -1,20 +1,29 @@
import net
fn test_socket() {
// server := net.listen(8080)
// server := net.listen(8080) or {
// println(err)
// return
// }
// println(server)
// client := net.dial('127.0.0.1', 8080)
// client := net.dial('127.0.0.1', 8080) or {
// println(err)
// return
// }
// println(client)
// socket := server.accept()
// socket := server.accept() or {
// println(err)
// return
// }
// println(socket)
//
// message := 'Hello World'
// socket.send(message.str, message.len)
// println('Sent: ' + message)
//
// bytes := client.recv(1024)
// println('Received: ' + tos(bytes, message.len))
//
// server.close()
// client.close()
// socket.close()

20
vlib/net/socket_win.v
View File

@ -3,23 +3,3 @@ module net
#flag -lws2_32
#include <winsock2.h>
#include <Ws2tcpip.h>
// Ref - https://docs.microsoft.com/en-us/windows/win32/api/winsock/nf-winsock-wsastartup
const (
WSA_V1 = 0x100 // C.MAKEWORD(1, 0)
WSA_V11 = 0x101 // C.MAKEWORD(1, 1)
WSA_V2 = 0x200 // C.MAKEWORD(2, 0)
WSA_V21 = 0x201 // C.MAKEWORD(2, 1)
WSA_V22 = 0x202 // C.MAKEWORD(2, 2)
)
pub fn socket(family int, stype int, prototype int) Socket {
sockfd := C.socket(family, _type, proto)
s := Socket {
sockfd: sockfd
family: family
_type: _type
proto: proto
}
return s
}