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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。$ [" c6 \, M2 e4 o. J. K* p
客户端程序:client.cpp
( A0 m% g% B% |2 l- e. o4 [- #include <winsock2.h>( G" C$ n6 Z' {
- #include <stdio.h>( H4 [7 ?$ k3 p0 c2 @
- #include <stdlib.h>
1 ` B- ~# b2 m* g h- R7 s/ Z4 k& z
4 }/ M2 m/ P$ ?/ t- #define DEFAULT_PORT 5150 P' R5 P% l( L; z/ e* O
- #define DEFAULT_BUFFER 2048
. J2 k, y7 m, g# `; y$ v
; K0 \8 r4 R8 l( K, s/ I- char szServer[128],, @5 B; i5 ^6 a; n2 C
- szMessage[1024];
9 z E: h7 w! L+ E - int iPort = DEFAULT_PORT;
8 K# [) V+ q; k% M
$ g3 Q y0 o7 ?, g; o- int main()4 G2 @5 j7 _2 _6 h( D; c& }
- {. [. o$ ^- u$ y: S S9 G* t
- WSADATA wsd;2 U' Y \- Z1 s- \& u& M4 g5 }
- SOCKET sClient;
! z- S5 L; q& R2 k* { - char szBuffer[DEFAULT_BUFFER];
5 z! d, m3 C. J+ ~: {+ q - int ret;! B o! i# ]" x
- struct sockaddr_in server;
( ^* P+ y: j( t4 W! M/ K, i - struct hostent *host = NULL;6 g9 P! X. ~1 D" p
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
: V. J* i) A/ H& {- m4 b- @# D - {3 e7 F! }5 Z3 @( y1 M& C
- printf("Failed to load Winsock library!\n");; d4 s, ]/ w# h9 U3 W
- return 1;: c, e! D5 k y
- }
( o. X9 H6 I3 b8 S$ v - printf("Enter a string to send to server:\n");6 `( _8 a. u1 p3 | k: w
- gets(szMessage);
: e4 Q4 W% q, A' U! C2 U8 m2 W - // Create the socket, and attempt to connect to the server( P s# ?% g# C% F7 W Q
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
/ m# a2 g I+ \( z1 F$ @, r - if (sClient == INVALID_SOCKET)8 f7 D6 c3 G/ N2 ]3 a
- {
* ], h6 D1 |" I$ j3 b, Q% g - printf("socket() failed: %d\n", WSAGetLastError());
4 P- V, O2 w | - return 1;
0 Q8 Q( G8 ]5 V. B2 ~! T - }$ z% E9 q4 F/ a& t0 c d
- server.sin_family = AF_INET;
* l" `( s4 e+ c' U/ ], a1 k - server.sin_port = htons(iPort);( q( v8 A% T; E! O7 B0 b. l
- server.sin_addr.s_addr = inet_addr("127.0.0.1"); c X2 ~8 V: j& i3 t
3 K8 J' c; y C& k/ M" F7 W7 H- if (connect(sClient, (struct sockaddr *)&server,; ?2 k5 w( E/ R+ d6 E" I
- sizeof(server)) == SOCKET_ERROR)
7 Z! ~- K. K/ V8 k5 u# q2 F - {* U, i7 A: l/ q) ^/ N
- printf("connect() failed: %d\n", WSAGetLastError());
d6 G7 x9 J* c# h% u( j - return 1;
" _/ C0 K Q& j, ]2 t/ k - }
5 m) }' D2 ~# p* s* h - // Send and receive data- X* E. x$ a- g8 ^9 M5 I/ d; d+ N
- ret = send(sClient, szMessage, strlen(szMessage), 0);
6 x$ n1 E& P) O$ v3 X - if (ret == SOCKET_ERROR)
6 j8 `- G% y" z: @. _ - {
) ` r) s- o# |8 m' s - printf("send() failed: %d\n", WSAGetLastError());) h& `: T1 N/ y4 r
- }6 \5 e9 h0 b8 n6 g( V* ]- j/ B$ \" H
- else{$ H& f, ?8 A* O2 G2 x, }1 b `2 E
- printf("Send '%s' \n", szMessage);
( q0 `. z# m0 P2 J - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);9 a/ U3 P8 L; @$ P, e' F
- if (ret == SOCKET_ERROR){
( K" n' d/ N1 B* O - printf("recv() failed: %d\n", WSAGetLastError());
! j1 z5 y. t7 T3 w. |# I, ?8 n& X - }) }. R( s0 t( w, h
- else{
/ W( M1 E4 l1 N - szBuffer[ret] = '\0';
1 q$ V) q" e3 o - printf("RECV: '%s'\n",szBuffer);
3 x- q4 e1 a3 a( e5 } - }
4 [/ l8 @( f7 w2 F# M - }
& I# B2 k0 a7 \- A - closesocket(sClient);# Q' K( ]5 t: A
- 1 }2 a" h7 \1 H- f1 }% f, k
- WSACleanup();
# v. G S3 T$ C, D - return 0;9 V6 `8 ^7 J/ l& e- c4 w5 [. Q
- }
复制代码 服务器程序:server.cpp2 ~5 J9 x6 X3 y0 j
- #include <winsock2.h>
4 k& H4 b1 k% }+ C - #include <stdio.h>$ U7 V' s; d2 B0 s" |- k4 @" E
- #include <stdlib.h>
- z) a z9 U; k* ` Z - v' ?/ G( m+ L8 ]+ e1 V
- #define DEFAULT_PORT 5150
( z- Y4 E. b8 L4 h' W7 ~6 W - #define DEFAULT_BUFFER 4096
* k$ F4 p* m; a - ' x4 q1 G% [* d+ W( L6 U: ?
- int iPort = DEFAULT_PORT;
1 P1 l8 C* U H4 M - char szAddress[128];: y- Y! ?. Q- W
- $ Q/ x! S8 A/ @3 B* e4 z7 g2 a# J
- DWORD WINAPI ClientThread(LPVOID lpParam)- J& b; q \4 t Z9 j
- {
3 G t' _! r, m7 _* W: L - SOCKET sock=(SOCKET)lpParam;
' s% X! ^) ]4 ^1 H' F: R - char szBuff[DEFAULT_BUFFER];" ^; q/ M: h. l8 N3 C
- int ret;$ z& Z5 J8 O9 G- h
- " c! W! a7 T; u3 j; u4 S8 w7 o
- while(1)6 `$ x" L4 j7 n Y9 N0 M( n; k
- {' I' F' Z8 r) D$ W6 x
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);( X8 u# Y$ s" e$ A( c+ p
- if (ret == 0), M6 F: y3 O& e
- break;9 t j- s7 K- w/ k& ~
- else if (ret == SOCKET_ERROR)
4 k4 {. U; w3 u% o3 P - {
% N% k1 _5 B7 n1 E. N+ x - printf("recv() failed: %d\n", WSAGetLastError());/ V+ m! N( E# _9 n
- break;
3 E9 U3 w9 S4 s* o - }
" q; Y/ J2 _8 w% o* q5 z3 c - szBuff[ret] = '\0';
* o+ Q# p% B( C1 R - printf("RECV: '%s'\n", szBuff);
( N! ], T& j2 K- v- H4 h' ]; | - if(strcmp(szBuff,"abc")==0){
4 L6 J+ W# D7 ^0 B2 L% {1 _ - memcpy(szBuff,"Send the correct string!",25);, f5 l3 ^$ e. L( k* ]" n
- }! I$ T" k1 ]9 }6 a3 o
- else{
, j. A' ^# Q+ M - memcpy(szBuff,"Send the wrong string!",23);
" U3 B& r& u* ^! a5 R8 c) P - }
" T4 O7 o* r2 @7 _$ s0 F# Q9 }0 Q - ret = send(sock, szBuff, strlen(szBuff), 0);
: y' G: ]5 [1 [+ s4 E7 ? - if (ret == SOCKET_ERROR){, `" U4 c; g: y0 V
- printf("send() failed: %d\n", WSAGetLastError());
2 f+ X, n; b4 k. w) U7 {9 @ - }
# Y+ R9 p1 O( v, H - }0 e9 ~' E% g% k3 k- i9 }
- return 0;
9 r6 J' M. t* B9 j - }
* |' ]$ A8 k, q8 C0 U0 P - / O% ~" k/ r' o& s, G& {6 U H
- int main()' ~+ Y* m, d3 u. Y0 x/ d6 O$ X2 l
- {
' p- W c* h6 T, c, D - WSADATA wsd;
8 H( N" [- ~& Y! U6 v3 I7 D. U - SOCKET sListen,) m$ L) t8 E3 ^' q4 R* P
- sClient;' b* F, Y0 Q6 C" {
- int iAddrSize;
/ f) I; W7 Q, a# R v! E' _ - HANDLE hThread;$ b& t9 B' c! O+ N/ B) f4 G
- DWORD dwThreadId;+ @# N0 N. h. V8 n
- struct sockaddr_in local,
7 M: i3 i; H o1 z# x( H - client;
, v J* Y% @1 w. f& J& z9 T
; x: W- H' L) \- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)5 u: h1 @) f' z
- {6 @% E3 \' X. d3 \% n
- printf("Failed to load Winsock!\n");
) v% e% X( x$ e5 q& P - return 1;
* |8 o0 [- D A. N - }
) A* d( h; R. [& t# |9 L - // Create our listening socket6 L- x' h6 w7 Q P
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP); X6 O0 B5 h5 b' c9 ~/ k2 u
- if (sListen == SOCKET_ERROR)2 ]9 S1 D# H8 c2 D
- {
* w' ]$ x. F" _ - printf("socket() failed: %d\n", WSAGetLastError());. K$ V w* W/ J: j
- return 1;. ?9 K6 @0 R, y2 u3 u n; @
- }
$ f7 u, C- |9 @ - local.sin_addr.s_addr = htonl(INADDR_ANY);% K% ?2 A+ t6 D/ C: z/ M
- local.sin_family = AF_INET;
8 N- f8 B+ ?2 v - local.sin_port = htons(iPort);9 o1 g: I' |. w+ K6 T$ o
- & h5 O. y; a. V4 T- u+ Q( t/ S
- if (bind(sListen, (struct sockaddr *)&local,* L2 ~0 ]5 j4 V0 a% B
- sizeof(local)) == SOCKET_ERROR)( a8 a/ i# L4 \' O D% [
- {9 b7 k4 L* x4 R4 }) H$ u
- printf("bind() failed: %d\n", WSAGetLastError());$ j# g f0 V ?2 m7 A+ Z6 A& }5 t# d
- return 1;
5 P1 ~4 X( Z( K& ` - }
. V4 ~+ t8 ^# V$ |0 m - listen(sListen, 8);
; P% a J; X. j2 @ - // In a continous loop, wait for incoming clients. Once one2 G; f/ a" w( N$ a7 F
- // is detected, create a thread and pass the handle off to it.! I/ q2 ]# L4 m
- while (1)3 b+ d% k. g5 j6 Q+ c7 v* `8 ~* B
- {% j' ]% V+ l& t4 y; |
- iAddrSize = sizeof(client);
/ X* k1 p- a7 V9 `$ N: o* t* s - sClient = accept(sListen, (struct sockaddr *)&client,/ K( J6 L# ^! d, m5 v" h
- &iAddrSize);
( N5 o4 v+ y# ?7 U4 R1 S$ U; a5 M - if (sClient == INVALID_SOCKET)
& b6 r H/ Q0 b! J - {
- ~ E9 U& Z }1 Y3 D - printf("accept() failed: %d\n", WSAGetLastError());3 U& w0 \; X: C/ g
- break;
/ a3 u' u5 \( n4 c( R7 X - }
O& a3 D" I; r: e. p - printf("Accepted client: %s:%d\n",
1 J+ ` A2 | R& G - inet_ntoa(client.sin_addr), ntohs(client.sin_port));
2 Z( p8 {2 m0 M5 I" y+ f- J+ g9 H - & W- \7 L2 X) K1 v
- hThread = CreateThread(NULL, 0, ClientThread,
/ ~ ]; x- S7 {# l0 }" d$ a. Z/ D' h - (LPVOID)sClient, 0, &dwThreadId);
) z0 p& p3 S8 s* ~3 _1 w; t - if (hThread == NULL)
: a0 o& F% |& T# W' @+ I. S - {
( g; E1 ^1 \3 W2 V0 Y# L, E - printf("CreateThread() failed: %d\n", GetLastError());7 w, D2 u+ E2 t* S# z" e% c
- break;$ E2 Q" I- |; K& e- d4 h
- }( w! b' Q h% ~1 B, [2 q O& k) V
- CloseHandle(hThread);
7 n% a. g% O, j3 L% u - }5 f! b8 ]$ H/ N J( I
- closesocket(sListen);
2 x! Z" a* W, {/ u2 G/ H -
# l# r% |6 s; I- B# x1 j6 v - WSACleanup();6 E4 V; n1 C$ K" [
- return 0;% o/ n! r6 |2 _0 w2 ]
- }
复制代码 : R4 Z! M7 H! }. C# A4 W/ E
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