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程序很简单,windows环境下的,客户端和服务器程序都在本机运行,在客户端输入发送给服务器的字符串,服务器收到字符串后会打印出来,同时与"abc"比较,与"abc"相同就会返给客户端,输入的是正确的,不同会告诉客户端输入时错误的。
' ^* k/ r1 ?4 j- j6 {0 t客户端程序:client.cpp
2 _* ]$ E, h" n* w- #include <winsock2.h>1 m1 t5 p! i& L# U3 D
- #include <stdio.h>
) [2 i; b- F: n6 P; t* z& X - #include <stdlib.h>: ]$ p, c3 ^3 k5 ^
- / H4 `$ A1 `3 k4 i5 E
- #define DEFAULT_PORT 5150
# ?& k. h# X( x! l - #define DEFAULT_BUFFER 2048
! {2 g+ g; q+ e8 ~- \2 N
: l# A* C$ a: _. T! }; O' e1 Z- char szServer[128],& n( Y4 d3 i. B E7 k& p
- szMessage[1024];
& p6 W' O# K% M. G - int iPort = DEFAULT_PORT;
* c3 [0 J( }. o% I6 n8 G. x - . @$ E# v1 N# ]% @" ^
- int main()
/ e0 c( m$ Q- X1 M - {
) @! k& I" }- V8 y1 ^2 L - WSADATA wsd;
" D) C1 F+ v- s: C7 Y6 N8 v - SOCKET sClient;! [" [* R" c4 j g4 y
- char szBuffer[DEFAULT_BUFFER];
; |" ^1 l, H4 Y9 Q$ x - int ret;
) Y4 S1 _9 `4 @6 q- X) B, H2 N; m - struct sockaddr_in server;
% R3 [5 t" ? N6 ^ - struct hostent *host = NULL;% {' |2 a, H5 f- t# f
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
2 Q$ u( x, P/ \ - {6 R1 I7 x9 S$ [+ ?7 J* G& \
- printf("Failed to load Winsock library!\n");
1 t. s: s; p$ ^' V, | |! N+ t8 O - return 1;
$ u1 W" k* b! J: k# V$ g - }
" x0 Y! s5 c2 d2 ^- S. U - printf("Enter a string to send to server:\n");, D1 E$ b+ A0 R) g. Q% O3 X; {
- gets(szMessage);# n+ ?: U* C8 K9 C
- // Create the socket, and attempt to connect to the server
- N/ y# O$ I( r - sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);3 t- k. P+ j% P* w
- if (sClient == INVALID_SOCKET)2 ~ m+ K3 v, C2 O! Z8 @. s ^' L
- {
0 O9 L" K1 L$ H; L5 B( ]8 I' j - printf("socket() failed: %d\n", WSAGetLastError());
6 Y5 `6 V) d& y9 {, L7 P - return 1;6 a1 J4 T* @- I5 h: }1 _- C. h" B
- }
3 a- x5 w! ^9 b$ ?9 F2 g; Z+ g7 B - server.sin_family = AF_INET;
) R7 b! ?# ], W5 z! l# J8 X2 `2 u - server.sin_port = htons(iPort);, p# r* J) i% H* D
- server.sin_addr.s_addr = inet_addr("127.0.0.1");8 N( B" q! V; c. R, f, `+ @
- 8 F8 R/ t, o4 b( v# I. D, Q( A
- if (connect(sClient, (struct sockaddr *)&server,
" R. M! o' R' w - sizeof(server)) == SOCKET_ERROR)
% P c2 B' K. I* Y n+ s8 m - {
/ ~! c6 T/ l0 z9 s - printf("connect() failed: %d\n", WSAGetLastError());2 G, `0 S! X4 h& ], T4 `( p
- return 1;
6 _- ]7 |! C8 M0 x - }
' [' u4 {& s/ ^ - // Send and receive data" K' A6 R: U& l+ r
- ret = send(sClient, szMessage, strlen(szMessage), 0);
/ O! v9 Z: H9 o+ x - if (ret == SOCKET_ERROR)2 v" m, Q9 N6 O5 ]' {
- {& \; ]* k: @5 `; E9 w2 m2 |5 [& K
- printf("send() failed: %d\n", WSAGetLastError());
6 N; r x# y( b0 s2 |% }7 E - }& ]; B1 d) M' C3 S* N
- else{
# a: D* c: q9 p* i! S$ W0 {: l - printf("Send '%s' \n", szMessage);
% D" i; M! N, p8 B' T8 V - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);# p% _4 F0 e1 Q% G" J" j" E
- if (ret == SOCKET_ERROR){3 ]# M C& @: A/ n B
- printf("recv() failed: %d\n", WSAGetLastError());/ {- r4 F# j2 A! j
- }3 w L) a1 Z1 f6 P: a1 L R
- else{8 c5 F6 C4 ~5 K
- szBuffer[ret] = '\0';" b, ?1 s8 Y+ J O
- printf("RECV: '%s'\n",szBuffer);
* F2 ?6 P+ I2 K - }& `( u6 `% P7 N7 Y: N$ k! y* i
- }# j" s: Y4 Y2 ^% p
- closesocket(sClient);
' F% ?0 n7 \ m$ @! y - ' K* u: n2 R1 i
- WSACleanup();
3 A$ c! G$ ?, I: v. C# ^& M2 z - return 0;- Q2 d2 r# ?, i+ ?) Y. R
- }
复制代码 服务器程序:server.cpp
3 I; h$ B* g: S" r) U C- #include <winsock2.h>( p; R( {( j) c: w& `& Q' R9 j5 s, w
- #include <stdio.h>
' T0 E( _! n2 ?( P; n* Z# n - #include <stdlib.h>
4 d$ U8 v3 o5 G2 M1 M% c# C
& H: E2 E$ e* W& u; Y, M* @( I$ \- #define DEFAULT_PORT 51509 c' l- b! D( U* D
- #define DEFAULT_BUFFER 4096
1 _- a8 b3 j) U' M& H
/ k% T5 S/ _1 L: v, P& I8 k- int iPort = DEFAULT_PORT;
! M; ~8 T# K: h: X5 o - char szAddress[128];
* i+ P7 s M5 F8 j, Q - . Z" y. ~; B' \# W
- DWORD WINAPI ClientThread(LPVOID lpParam), b" ~9 U7 z, k4 G6 c
- {
% T6 j6 l W8 f3 J9 C) u - SOCKET sock=(SOCKET)lpParam;
4 |: \4 P. x! h/ t% D - char szBuff[DEFAULT_BUFFER];' h% p/ X6 g2 U
- int ret;
: n# y8 Q. E) m4 X* s6 i2 N
5 ?2 N9 d5 M- v9 D; c$ i- while(1)
# I( m/ T" `# t6 ^* u7 D. P - {6 O6 [8 s* t& K) g; R
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0); P7 |5 r. m# c3 }
- if (ret == 0)' T M5 Y' Q( P; i: J
- break;
: D3 \/ R1 U# g$ m" i - else if (ret == SOCKET_ERROR). j4 W. o/ Y3 ]2 ^) X, R8 U* i
- { M/ c+ o) F' o4 |9 H2 B7 V+ c
- printf("recv() failed: %d\n", WSAGetLastError());
, M. W$ K& Y# V# T5 g - break;
: ?, C# K9 a2 a" G! {" X - }+ v7 _( [/ I/ n) k9 B9 c
- szBuff[ret] = '\0';
) n% n! k1 M( o# |4 A/ E - printf("RECV: '%s'\n", szBuff);0 d: Q/ F" @1 Q- n: A9 B
- if(strcmp(szBuff,"abc")==0){4 H) y9 J* x- {. N7 _
- memcpy(szBuff,"Send the correct string!",25);
% i& Z* S. z# a/ k) W0 e9 d L - }+ z Y2 q; f5 C
- else{
' j( O% g, H1 b1 E- B - memcpy(szBuff,"Send the wrong string!",23);0 v" u0 K9 E0 `& \/ @
- }
l1 i& _0 V4 U& {. M2 z! @ - ret = send(sock, szBuff, strlen(szBuff), 0);0 ], X- Z; H% v# y7 r, @: Y
- if (ret == SOCKET_ERROR){( V# [0 R/ p, b$ w/ Y
- printf("send() failed: %d\n", WSAGetLastError());) y' m" o2 h! I; \( }! |, f
- }
2 m7 M8 x9 O+ U" Q4 C2 I. ^) y" f - }
* o) A0 A- N# U8 s$ C - return 0;, O. ?6 I0 _( L" e2 S
- }* A: o1 T! R& S( G9 N
5 r3 z; ]* V' q% z( Z- int main()+ X9 \8 F" E8 k" T
- {
' T* N1 Z; Q- p3 o! q0 h - WSADATA wsd;: [+ X, E: n2 B& Y4 S, b1 P
- SOCKET sListen,
! ~( d( O3 ]8 U8 T* b& a! Q - sClient;9 m8 z; I% z) \ {) ~
- int iAddrSize;# P+ `* @" w8 R3 H$ I1 ]
- HANDLE hThread;
m7 k+ t& b* g3 e- H - DWORD dwThreadId;
g7 X1 h* l# d0 R - struct sockaddr_in local,
+ I, m- L" a/ n - client;
6 q, M. h5 d4 d! |$ ~& w$ M, a$ z
6 Z9 l+ |7 S" K9 c2 J( |- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
4 u" X' Q6 d4 \% X5 M - { W' d c" k3 S" y5 @
- printf("Failed to load Winsock!\n");3 e0 C# M& @# W! F
- return 1;7 k0 Q) S+ X9 G( [* } u
- }
1 n& B2 d+ s& O3 r - // Create our listening socket( c" [: u* r5 B `/ C5 ~* o! Y3 x
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
5 c c7 r/ w. m, ]9 M# ` - if (sListen == SOCKET_ERROR); _" J( H4 |( U- P7 q, i0 m0 c
- {! g" f% d" E9 J# @, w1 B
- printf("socket() failed: %d\n", WSAGetLastError());
5 v5 `2 ] q$ ]- W9 J - return 1;, G0 K0 J6 |+ E4 x0 ~/ X; [! m; t
- }9 u7 O4 t+ v' m% n& \1 e8 i: K
- local.sin_addr.s_addr = htonl(INADDR_ANY);# y2 y9 H; x+ m
- local.sin_family = AF_INET;
. ~! X$ V) ~( [, |+ Z - local.sin_port = htons(iPort);
6 n1 M! ]/ m+ X& Q8 e
/ o2 G1 R% Q7 Z- if (bind(sListen, (struct sockaddr *)&local,* J# V( }7 a9 ^+ C- \2 b
- sizeof(local)) == SOCKET_ERROR)8 M/ G: N- W, ~2 A6 U2 P9 k
- {
/ t2 u7 D0 C# }: i; b5 `: L3 Z - printf("bind() failed: %d\n", WSAGetLastError());
7 ` l5 n1 E3 t6 E. D' D - return 1;1 Q o7 R- X- ^& G3 Q: x
- }3 C z6 z/ _) R
- listen(sListen, 8);
2 B9 B8 h1 ~# t0 z) Y: n - // In a continous loop, wait for incoming clients. Once one8 w3 v' f1 m8 I4 c2 f9 J
- // is detected, create a thread and pass the handle off to it., z6 _8 E% J, b3 u6 d' d5 Y3 a
- while (1)8 K: y5 w! ?* F# d& I$ e$ c
- {
) n6 _7 O: a5 j! X% n4 Y4 l - iAddrSize = sizeof(client);0 n% S3 q% }1 q; o3 N% d1 T4 t
- sClient = accept(sListen, (struct sockaddr *)&client,; O$ l7 I& X6 I3 D9 m
- &iAddrSize);
0 H8 x" }* x! G1 D - if (sClient == INVALID_SOCKET)
: N4 R$ ?* O' s7 _# X( C - {
+ [. b' _ Y; H5 y3 S; F4 S* X7 b - printf("accept() failed: %d\n", WSAGetLastError());
0 b$ |) B/ A% k9 q+ I - break;
/ K6 @% x/ O$ Q. W6 ^' e; n# z - }7 S" x1 {) S' Q" P2 N( }
- printf("Accepted client: %s:%d\n",) ~0 m, ^& x, ~# b; O" b8 T
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));- ]' I$ u0 l% ~' K$ h% X+ Q5 }- N
5 F% H* R2 ^; ^/ R- hThread = CreateThread(NULL, 0, ClientThread,2 K, e ~" v+ P8 j2 q
- (LPVOID)sClient, 0, &dwThreadId);
% w* ^8 q; c" i2 p, ^ - if (hThread == NULL): B8 f/ Y/ L, O: X
- {- {* v5 M0 a* I* u. l: n; E9 B
- printf("CreateThread() failed: %d\n", GetLastError());
% r' ?) ?; w0 b d& [8 j - break;
i: m- i: v: Z2 T - }& B. L% P2 p1 T8 q' t) r
- CloseHandle(hThread);
/ Q( D" _' c% I - }
8 N' u# c1 K/ C" N+ t4 | - closesocket(sListen);; ^, Z9 B) i- f& \+ D z
- 1 k8 B, D0 U0 |5 w: K6 u- l8 N2 \
- WSACleanup();
0 l( ^ Y* c! n* d2 t - return 0;
9 ^5 S: u/ P! V( c5 k m - }
复制代码
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