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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。
' s* e' K# n8 n. q+ Q客户端程序:client.cpp
# ~$ L3 C) C, p( U; v% U- J4 {7 u- #include <winsock2.h>8 E9 |; K. y/ y$ Z
- #include <stdio.h>+ R' l/ C+ ~; ^1 p# }; l) {
- #include <stdlib.h>. O" T/ ~+ C0 {' D
- % P! o( [+ C5 u
- #define DEFAULT_PORT 5150
+ s; a& G2 q& q! N2 F5 r. { - #define DEFAULT_BUFFER 2048
" Q9 F n9 z2 I6 ?! `# A6 y
7 c; D' C! z$ Y z0 z, z9 ?7 S, [- char szServer[128],6 {0 N/ c4 }# {. ?6 E: ~# g
- szMessage[1024];8 T4 \! h3 O! n% e7 t) z
- int iPort = DEFAULT_PORT;7 w; W" E k3 r: j* o* ]9 I* g
: ?, Q+ u7 y( A7 F" F2 w3 C3 F7 R2 I- int main()
5 o8 j/ g) L+ b' r6 |: g - {
( a8 e$ N' ?$ H9 B - WSADATA wsd;
, Y# ~! X! {! _; l' z1 _) A - SOCKET sClient;. J* _9 c/ M4 S% a
- char szBuffer[DEFAULT_BUFFER];. G3 z* i% x$ H h# {$ o
- int ret;6 m4 q+ P5 e2 a8 X I' j& G) J8 S- ^+ p
- struct sockaddr_in server;
. c5 ^+ H! g) b% @" k4 ^! g - struct hostent *host = NULL;
( P. R) L% D5 H3 p" A" V - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
3 ^+ ?/ G2 Q0 ~2 |! b v0 h4 i! t. Z! k2 w - {
/ W' z$ v9 f9 G$ b$ S/ E9 y - printf("Failed to load Winsock library!\n");
5 ]8 W6 Q- g4 [( w. j3 J& L - return 1;% I& }, C0 Z; j; G/ f9 R
- }2 p: N* u* P6 G( O/ F
- printf("Enter a string to send to server:\n");9 G/ i5 m: q1 C. R" L
- gets(szMessage);! N+ v2 p6 o* h: b5 O
- // Create the socket, and attempt to connect to the server8 i2 w0 t1 d3 H
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);9 ?# ~- Z2 M6 T; J# U) l0 j
- if (sClient == INVALID_SOCKET)8 q8 Y- Q k9 S! h
- {, [7 _4 T' O8 ?/ W7 Q
- printf("socket() failed: %d\n", WSAGetLastError());
! Z I! ~! { X - return 1;7 y# q h1 I( c- X* P
- }( I, b, n" t3 W$ P- C) m
- server.sin_family = AF_INET;
) v6 G- z7 f2 O - server.sin_port = htons(iPort);
1 D2 X: D; b$ O' c - server.sin_addr.s_addr = inet_addr("127.0.0.1");
% P3 U" y" V( C! w+ f! N8 C$ H - " T- H- v) F0 M% r
- if (connect(sClient, (struct sockaddr *)&server,
+ l# Z( u0 X8 F - sizeof(server)) == SOCKET_ERROR)
" q+ D9 m" s4 P - {; r9 p/ A2 q% C2 ?+ ?" V
- printf("connect() failed: %d\n", WSAGetLastError());+ O5 n: k6 A6 Q7 g2 ^
- return 1;) Q8 ~! D2 u) a# v1 w. g1 s
- }
; H3 ? x! _6 N/ e, k4 r3 H* o - // Send and receive data. B: X1 ~; m" d E R- `! ^
- ret = send(sClient, szMessage, strlen(szMessage), 0);9 R' _. K7 z: A; P
- if (ret == SOCKET_ERROR)
/ p4 |: y% Z4 k. |( I" k - {) G, v* Y3 N5 ?' U. ?5 k0 {
- printf("send() failed: %d\n", WSAGetLastError());- U- b/ g: n: l4 x
- }
; l! M8 ]* D' s4 D4 T" l+ ~, ~ - else{0 g1 I# e# N) }7 l* r; r4 N
- printf("Send '%s' \n", szMessage);% y' ^" F/ Y2 n. U% L' g
- ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
: h& F0 K' {8 q$ X5 T5 d. S% `! w - if (ret == SOCKET_ERROR){+ q! ~/ Z; F2 d3 J
- printf("recv() failed: %d\n", WSAGetLastError());
% r% P& i2 m }0 I" ~7 K - }
5 }& Z& X7 c I9 p, g+ r5 Q - else{
6 b/ m# K$ a1 d - szBuffer[ret] = '\0';7 z9 r- o. g# {; E0 e& o# m
- printf("RECV: '%s'\n",szBuffer);7 j+ d, |4 P# L# s( e) e5 n
- }( q# ]1 J9 l# D7 r. D
- }& ?8 W* c5 L3 n; t
- closesocket(sClient);; ^; F/ T) q% F* x. I9 e
$ l- Y4 G5 K, C) C' J+ o- WSACleanup();
6 w0 z v) e- l( E - return 0;" Q4 H$ r4 E! k0 }7 ~; q* G6 Z
- }
复制代码 服务器程序:server.cpp
9 `$ c2 t5 {" i( ?5 P* v& L- #include <winsock2.h>1 v* W9 T: o* e- {
- #include <stdio.h>
, e" C- Z, D7 ^! D+ w1 M - #include <stdlib.h>8 U6 s1 f) u: y( n9 j5 t/ Z6 G
1 f$ @" j( O1 x q0 U; W- #define DEFAULT_PORT 5150
8 A9 _+ i- i' w# F - #define DEFAULT_BUFFER 4096& U1 ?" A' y7 ]0 |
- ' S& u7 i( |* h6 @; H& }0 K
- int iPort = DEFAULT_PORT;
0 C4 t# {5 R" @# s3 `4 E, G - char szAddress[128]; u. V4 U, p3 @0 X6 f, B
- , O R8 p1 | e3 m2 ?7 e2 P) u1 o3 t
- DWORD WINAPI ClientThread(LPVOID lpParam)% T/ T" Z- H e5 s; x
- {" E8 A) W# j. e6 I6 f4 t- e& d, s
- SOCKET sock=(SOCKET)lpParam;
3 y+ P5 @2 u; C9 F) c - char szBuff[DEFAULT_BUFFER];# ]7 J) I" c4 `" T
- int ret;
- i) }4 E. o& w, N
! Q+ |3 Y+ q6 D* ?* N8 j- while(1); B& g1 b3 e/ W% L# |9 j U
- {
6 E& b" l4 h9 N - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);+ a, V' b! R, x
- if (ret == 0)
0 y/ l! u- q/ R# h9 X( X - break;# S! v" f: `6 r6 ?2 _; Q
- else if (ret == SOCKET_ERROR)4 B- m0 p) @# [0 y4 d. {
- {
" ?1 K( w" {' l! ?0 d3 y' K - printf("recv() failed: %d\n", WSAGetLastError());
+ |7 g( H$ e# _+ m5 f+ I* K, W - break;" v$ F/ h0 p5 u I; C5 ~5 O% _+ `
- }
4 X$ y# s$ d0 x$ o9 [/ o" R+ f - szBuff[ret] = '\0';+ [4 h" ^4 ]* V6 P" b- h
- printf("RECV: '%s'\n", szBuff);
8 |( C I& E- M) r8 D& Y - if(strcmp(szBuff,"abc")==0){
4 j; L: e$ h# u" Z - memcpy(szBuff,"Send the correct string!",25);1 k; {* F7 c# v" l) T2 f, e& ?
- }
% x& s: c: P+ ~( b+ o y4 |! p - else{1 q' z9 c, T2 K' d" O
- memcpy(szBuff,"Send the wrong string!",23);, K5 A3 z% a9 M8 k
- }5 w+ |% F( j9 F# G: z0 ~. |
- ret = send(sock, szBuff, strlen(szBuff), 0);
% i+ f2 G7 B' N6 c" k - if (ret == SOCKET_ERROR){& k* r* d9 s4 v. c( J' E
- printf("send() failed: %d\n", WSAGetLastError());% e8 I+ I6 u' m! s2 X- _- j4 }1 _) y
- }
6 ^7 c6 ^. Y+ q* V. x& G - }
- \* ^0 _" J, C - return 0;; }: I$ e5 J! }
- }
) S! F# L+ O& c, _8 x/ }
' y1 K$ ~+ M; Y3 m6 h- int main()
- p- Q. |/ T+ P+ @( ~/ {. \ - {
) d$ |2 w& D- @, k9 o - WSADATA wsd;
) Q* U/ K) m6 p5 r& M9 B: g0 c. x - SOCKET sListen,# h6 u7 k+ R5 g# @" P) `
- sClient;( h1 a2 n# ]- O; n' P1 _7 C( S; z
- int iAddrSize;
& B2 Q+ X K9 O* g: Z - HANDLE hThread;
. u* m/ [4 D) @, t d1 {! m' _$ j - DWORD dwThreadId;
6 T2 m, A4 |0 ?, ~) m - struct sockaddr_in local,( ]& q$ I; E+ L0 ?1 ?
- client;/ }6 O. C# `6 w& n: C
, `, k5 a$ Z1 ?) V- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
5 ~/ G" d5 \ ^3 k/ B - {
1 d: W! i+ r; o - printf("Failed to load Winsock!\n");. w3 \: t1 R1 o: Z% Z6 C
- return 1;. D. ?0 D1 l. q6 F
- }. V" v" q! l6 M- l
- // Create our listening socket8 b# w3 H6 [! n C1 Y. c
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);7 [- |3 y) q% y$ N6 k
- if (sListen == SOCKET_ERROR)5 _9 `3 ?2 W* Z4 i5 |! t" I% {
- {6 j0 ]: F$ F2 r- |
- printf("socket() failed: %d\n", WSAGetLastError());
! }% k8 ~2 f+ q0 s5 H - return 1;
8 ]9 V" c7 p6 Y, B - } E' U* X; i9 `
- local.sin_addr.s_addr = htonl(INADDR_ANY);+ T9 H. K. s/ a `/ z2 Z
- local.sin_family = AF_INET;
% x/ M4 H; L V9 u; y - local.sin_port = htons(iPort);
+ |& v, K5 e! d ?, g - ) ?- n- s) }# l& O8 r. R1 k, D& P
- if (bind(sListen, (struct sockaddr *)&local,
* K4 w. c) C* R z/ G8 f - sizeof(local)) == SOCKET_ERROR)) _5 r+ J. U3 ]$ r8 x/ C3 e
- {
9 Y9 Q# O3 J+ S; L l7 k+ G - printf("bind() failed: %d\n", WSAGetLastError());
+ s9 F, n8 Y0 n( d - return 1;& f1 l) U. Y9 x! E9 S# I
- }3 R0 }, r# w7 F2 X# q4 f" V
- listen(sListen, 8);/ U; v9 `, E* X" n H! R f% i( S
- // In a continous loop, wait for incoming clients. Once one G) i9 `' Z! B# k% _* U
- // is detected, create a thread and pass the handle off to it.
1 i* v8 v+ S( \) |2 t7 v* {# g7 U - while (1)
3 z) j! ~0 C& r5 }; D - {/ }1 u7 n7 Z8 M; m0 `
- iAddrSize = sizeof(client);
8 t, U2 B# s8 I; O- F - sClient = accept(sListen, (struct sockaddr *)&client,& T% n5 Q' ^3 x6 t& p! `; A
- &iAddrSize); 8 ~2 [3 E: J+ f
- if (sClient == INVALID_SOCKET)
8 z* d. c" |# u% I" h5 v u - { 0 B3 e( x1 z% R" w1 P
- printf("accept() failed: %d\n", WSAGetLastError());
" g2 ~& c' I# K6 D5 _ - break;
$ ?) I7 A, N- p: O. ~, y - }/ \, O) e4 h5 R; ^: X" O! h
- printf("Accepted client: %s:%d\n",
2 q+ O ^. N5 b2 g$ G* i - inet_ntoa(client.sin_addr), ntohs(client.sin_port));
3 M+ B" [4 X9 r
3 [/ l" @- P' B$ }2 S/ r8 e- hThread = CreateThread(NULL, 0, ClientThread, O- U1 ^( j, \2 F& k
- (LPVOID)sClient, 0, &dwThreadId);
; j: q5 V# `. j- n1 q3 A - if (hThread == NULL)8 s v8 B5 r5 l3 _6 B t9 t$ c
- {; l6 Q- \ I( H4 c/ G( Z
- printf("CreateThread() failed: %d\n", GetLastError());
! H6 ?, F* z9 v1 X) k1 {: @ - break;5 ^$ V- h6 [. E; k8 X1 J( h
- }
; p9 I3 [ G/ [$ y6 q5 {& [# V - CloseHandle(hThread);( u. M# e9 H$ c
- }4 m8 @9 o2 z) d6 I; i" H
- closesocket(sListen);
6 Y- v/ v9 t" c0 g1 ~; d3 N -
# P: _5 ^2 U1 m4 M: G - WSACleanup();9 G, Z, l c; s
- return 0;6 ]1 m3 H, `* \# w
- }
复制代码
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