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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。
; T4 _7 x" U+ n' h客户端程序:client.cpp
/ | a- s0 k. L( [0 f; Y1 L- #include <winsock2.h>0 M$ |4 f9 {/ `
- #include <stdio.h> X; a- Q7 N: j9 d" p
- #include <stdlib.h>: ~7 W1 G y5 ]
$ ]- k4 ~/ }4 O6 Q) n- #define DEFAULT_PORT 51502 n2 Z, \# B& E' @: S( j- H
- #define DEFAULT_BUFFER 20483 ^& e% R! U& L
; Z! I- |! q) `+ V- char szServer[128],7 i9 t" V! V2 b9 J& l+ k
- szMessage[1024];
1 x! y' Y( _, E( l# n# A% R1 G4 i$ n - int iPort = DEFAULT_PORT;* \' ^( }3 @; V
& O0 s# Y6 i2 i# \0 N- int main()& q% e7 j1 t# W, }7 K0 K. D
- {. ]+ A4 Y. }8 e
- WSADATA wsd;8 M7 S# ~. Y: r& x) G
- SOCKET sClient;
! u) Z7 ~; E# H- B d - char szBuffer[DEFAULT_BUFFER];+ f3 C3 G, V3 ` p. x
- int ret;
# A. {, G/ X) R - struct sockaddr_in server;
! b, H3 L9 P( ?- z/ }) O7 m - struct hostent *host = NULL;( I' S1 l0 z3 W/ G; [4 C, i
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
* M' p6 V9 }8 g: D - {7 ?8 I( S& D1 |) @0 N
- printf("Failed to load Winsock library!\n");( O3 N5 S, n5 }6 z6 y* f
- return 1;
6 _# W) o% J. w# V; h - }5 G* [* z, N8 R1 A
- printf("Enter a string to send to server:\n");! y) k8 N. O: J3 C5 f0 _
- gets(szMessage);
# c+ c( Z9 ]: u- u3 v0 y - // Create the socket, and attempt to connect to the server
5 M+ w& S' |0 C( @+ v - sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);3 L8 w* S' u& E/ [$ K! i# M" O
- if (sClient == INVALID_SOCKET)
; Z% k/ A) D! ^" F# ]8 C/ Q - {
0 v- |6 q" L$ N$ e: h8 u - printf("socket() failed: %d\n", WSAGetLastError());( U% r& X( \5 @& x
- return 1;* u- E! a7 G* }; j
- }
' J! @# A2 a2 y, Z2 f - server.sin_family = AF_INET;
' i% O, Y2 {+ B# w& L9 I - server.sin_port = htons(iPort);
& R8 O4 ^+ f. C/ @( ~" }7 h& S) j5 e - server.sin_addr.s_addr = inet_addr("127.0.0.1");
( c0 E: Y# E, w3 M9 C& p& v - ( K4 D/ A2 i, N" M
- if (connect(sClient, (struct sockaddr *)&server,
& K+ g4 j7 i' z - sizeof(server)) == SOCKET_ERROR)
% Y* z5 R4 k. \2 B - {+ {0 L$ v* ]2 W$ G
- printf("connect() failed: %d\n", WSAGetLastError());
9 H1 k& z: H( ~, s# H9 O+ P9 F - return 1;
% ~6 H- p2 z: _/ l$ |& o - }. y: T/ B) W# V4 k1 u |: b8 R) m$ a
- // Send and receive data
* l+ ^* W2 j. I4 L - ret = send(sClient, szMessage, strlen(szMessage), 0);
$ x0 K0 b" n, A* o* A( o" C3 Y4 c - if (ret == SOCKET_ERROR)
# O _9 ]8 Z. d5 U6 A* G! V7 m - {
' {& K5 b- Y6 }! x) c. G3 B0 g# y - printf("send() failed: %d\n", WSAGetLastError());2 D" Y/ Z+ l M! ^6 t
- }
, O4 s, c# a o; e- K - else{
9 L9 j, L$ y# U+ m3 q0 T3 O - printf("Send '%s' \n", szMessage);
: n5 F8 h3 a. P - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
: X" O; b- [: x! O* B - if (ret == SOCKET_ERROR){
% e! j% }$ ^6 a. L3 @6 A! L - printf("recv() failed: %d\n", WSAGetLastError());7 `# e$ _" w" [5 X
- }" f0 }& Z, l# v
- else{4 A) ~, {! Y8 ~# Q- U
- szBuffer[ret] = '\0';0 y" i* H+ ^, ~" E% f2 \7 l
- printf("RECV: '%s'\n",szBuffer);9 ^8 @ a! z% L P( h
- }4 F' |9 n2 b3 L/ j
- }4 Q1 [& ~6 M2 {( O" o2 e
- closesocket(sClient);1 i: S8 @! T9 P
! |5 f% [" c1 C1 y6 K- WSACleanup();# o" N* ?$ z+ s3 {) o9 {* v% B
- return 0;5 q3 X2 E9 j3 z9 h9 V. {1 L# |
- }
复制代码 服务器程序:server.cpp$ w1 E2 N5 \" L! H3 k! B: c
- #include <winsock2.h>1 h# C6 ` ?# c
- #include <stdio.h>
, I' l% f! \# w: h. h* L - #include <stdlib.h>
6 o8 S" N6 @% N9 h# T
( s/ Z3 H" E9 t) ]* c4 S" C- #define DEFAULT_PORT 5150% P6 m2 `; a: V$ K
- #define DEFAULT_BUFFER 4096& ~1 p; f) G4 ]6 X
+ \" n: Q0 A6 Q- v( J- int iPort = DEFAULT_PORT;0 Z' E7 J! m, }
- char szAddress[128];, Y! s3 a. R5 {' d
- 8 ]' `/ F0 N) d0 f3 J) H0 f
- DWORD WINAPI ClientThread(LPVOID lpParam), E; F, a+ m: }' X, I0 t/ f
- {
$ K* R( t- `2 O0 D4 u7 a - SOCKET sock=(SOCKET)lpParam;
# T4 G' g6 \1 j( Q# _ - char szBuff[DEFAULT_BUFFER];
2 q9 v% {9 _' y - int ret;+ h% e! b# F5 A$ J" N: `% E" f* d
- e1 r6 { G! J; I
- while(1)
" R/ G& n. ?7 l1 E' }: ^ - {4 T1 S# j" b6 v- M3 W2 [; s
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
1 |, D3 a$ y, c1 ~3 h; I - if (ret == 0)
/ g; @6 k+ e, M0 m9 ~ - break;
* K r. F; P) v! Z; o1 U - else if (ret == SOCKET_ERROR)
& U7 U0 K" @% ?2 t+ N - {1 n m& H7 D d5 O
- printf("recv() failed: %d\n", WSAGetLastError());9 j( }) |- l& J
- break;- L4 ^; P! f' c) n
- }2 T; v! C. S; O* K1 H
- szBuff[ret] = '\0';- Z$ E+ O ^; H2 I. d: Q
- printf("RECV: '%s'\n", szBuff);2 s+ b# W' d8 G5 ^. C/ D
- if(strcmp(szBuff,"abc")==0){
% i! h0 `" o6 |+ Z$ f! \5 P( O - memcpy(szBuff,"Send the correct string!",25);( x+ \& ` O, s+ S
- }7 f2 C) T1 q4 |5 `+ @4 ?& v Z
- else{4 L4 u9 j2 H+ e0 C, H( t
- memcpy(szBuff,"Send the wrong string!",23);
3 r" W+ P: n0 p5 z! L' `; U5 h - }) b* L. @0 S- w' z
- ret = send(sock, szBuff, strlen(szBuff), 0);& l2 n/ U( A! p/ y4 i3 C+ @7 n
- if (ret == SOCKET_ERROR){% }1 h( L7 U! l& b( S w: c& O$ l# ^
- printf("send() failed: %d\n", WSAGetLastError());
2 o8 x5 @, H' R1 ^ - }
5 o9 s( s3 ^$ c | - }
1 V$ B4 Y& Y( u: M$ W; a# R) v; R - return 0;
/ g+ w/ @: G$ v. w - }
, e- g B) V- v J - ' N# }4 r, N: W4 a& o
- int main()3 ~8 _: t) v' ~8 f g, J( }
- {3 V) O/ O( P9 B& z; z* E
- WSADATA wsd;# h, d/ a1 f" \( Q. z3 F
- SOCKET sListen,
; u( I( m4 K7 s2 r$ o# i8 \# R3 A - sClient;
) ]7 a7 P8 v6 U* k - int iAddrSize;
( d3 i3 R3 m# |8 T" C. j- ?0 k" s - HANDLE hThread;
# z4 l. X3 a5 q; q1 w - DWORD dwThreadId;0 Y1 i+ N5 O3 T- g( a$ `; @
- struct sockaddr_in local,
+ n$ h) O* \2 {, t - client;
5 R3 [& Y5 y1 I) H [* F* B - ( l) ~* J- K$ z; R. R
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
* d3 g* C0 E4 \ - {
+ j: { g0 t! L, }" m* o4 J- d - printf("Failed to load Winsock!\n");9 g5 h+ u5 K! G
- return 1;0 c9 n! g, K# r* J
- }
2 X/ X, w8 Y, Y; v6 t; f - // Create our listening socket
! X" @& O' q& J% t - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);! L, S# X* r8 ]
- if (sListen == SOCKET_ERROR)
& N4 L& g$ k" f+ z% H0 {* B - {
- F* v7 |% j& f' V+ `$ p. }+ y - printf("socket() failed: %d\n", WSAGetLastError());" ? O. N1 h5 g4 ^
- return 1;
& p4 Q) w7 p- ~5 W6 C - }% L0 z% C& H8 s; {0 ~9 \. {( P
- local.sin_addr.s_addr = htonl(INADDR_ANY);0 L3 {" D. Z8 {
- local.sin_family = AF_INET;" s; N1 {5 ^0 b
- local.sin_port = htons(iPort);
/ r7 o2 C6 J5 p( K+ k' a
2 E+ c) n- w* J. Y7 R& b! g5 U- if (bind(sListen, (struct sockaddr *)&local,
- h( L6 O' P' C - sizeof(local)) == SOCKET_ERROR)
i3 C0 s2 @. J) f' s$ m' F" G - {
( i1 E8 P1 q/ [ - printf("bind() failed: %d\n", WSAGetLastError());
# J$ k$ `7 Y6 Z - return 1;
2 L2 f V' q* Y( _% N* I - }
, Z" m2 C( S3 B - listen(sListen, 8);
9 t" h1 [' o- w& X - // In a continous loop, wait for incoming clients. Once one
+ b1 |4 d5 ~8 k1 X1 h - // is detected, create a thread and pass the handle off to it.
% x0 V' m+ ~- b7 i0 L' X - while (1)
, L+ g8 C9 I! c' m' z - {
9 Y( g) V1 _. k1 Q: O( x: g* S - iAddrSize = sizeof(client);
/ ]% Z& c0 O) {. _( }( b# d% R6 { - sClient = accept(sListen, (struct sockaddr *)&client,
$ v6 a7 Q5 r/ i/ s I' { - &iAddrSize);
/ n3 c1 U' {6 v& V5 P - if (sClient == INVALID_SOCKET)
" |! n0 I% X0 X/ U; u5 u - { $ i8 e) E' r( S7 C
- printf("accept() failed: %d\n", WSAGetLastError());
7 O8 [! H X' A# s - break;" Q# K/ Q9 H8 g* ~
- }
# J0 R$ ?' q8 @# E ^$ {* _9 D# P: B - printf("Accepted client: %s:%d\n",) S7 d8 z& d b" {' r. b: ?1 v4 }' V }
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));# v% g+ y) Z2 f
7 j- a9 q8 @9 O$ K7 `% E4 {4 K- hThread = CreateThread(NULL, 0, ClientThread,
" @7 k, y D1 q5 r - (LPVOID)sClient, 0, &dwThreadId);4 z! y( Q7 H7 t6 `, t3 \) d- b \
- if (hThread == NULL)
( o' X: X& F9 E- l) I - {
% F( N7 c1 F" W - printf("CreateThread() failed: %d\n", GetLastError());$ [" ?* A% _4 y! W
- break; Y3 Y3 d' b5 J5 m# ]: H. i
- }
8 E: w$ e" ~4 @0 s. f - CloseHandle(hThread);
# t' Q# o' P3 _ b0 C) ]8 ? - }& h0 e* N1 q, c, z* z- [! i1 e
- closesocket(sListen);
2 i" p w0 L/ j' G7 b! ? - & |8 X& t7 j9 p/ B" s
- WSACleanup();0 [0 S% h. K7 ~. V. l4 _
- return 0;
, L1 j, D( d H" w - }
复制代码 5 g: V) u# I: c; m V, l
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7 J( G# X' H6 D5 V1 H$ ?9 M. ?, O0 a
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