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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。
# q3 l- e1 |# \) I% Z% f客户端程序:client.cpp
$ O) U5 g, E: l# v- v" o- #include <winsock2.h>& m) j0 t1 e' A8 g n+ h$ ?4 A" X
- #include <stdio.h>
' F: p# h8 I. K' J+ }: N$ S - #include <stdlib.h>
; K0 L/ q% ]3 R7 F) m+ X* N - % w( g8 e0 u1 f7 I
- #define DEFAULT_PORT 5150
/ d9 O+ D$ p% Q @ - #define DEFAULT_BUFFER 2048) o% ?4 m2 }& E. h& ]2 `
- 9 [. z+ {; o# Z5 `6 `! G: W5 G
- char szServer[128],
7 d9 W* w3 X$ ?7 S$ c - szMessage[1024];
- q: K' S. F7 p9 ^3 }8 [+ A - int iPort = DEFAULT_PORT;$ l8 l9 p) z' {
# N6 Q6 _: |3 N' _% e3 ?- int main()
1 R" H2 f5 D f( T% G" J - {
5 w' y7 d5 a9 W) N - WSADATA wsd;& u1 x: d% H+ ?: u% u
- SOCKET sClient;
: C4 {! t: r" m3 T* q - char szBuffer[DEFAULT_BUFFER];
y" B# N8 j5 L' l: C) z - int ret;
1 ]1 V( Y$ P$ `* Z - struct sockaddr_in server;
' W) @2 w. d1 R5 H - struct hostent *host = NULL;
; U" ^( j! n* d" q. X1 G - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)0 U% s# n" A2 z/ c
- {4 L7 H' W5 F; h% m1 m9 |
- printf("Failed to load Winsock library!\n"); {( N9 X8 ?+ P0 s- u
- return 1;, W! M4 B' P8 s4 \8 T- T5 l9 F. b
- }
; `) w4 \4 Q H7 d+ f0 J* D7 w( { - printf("Enter a string to send to server:\n");
$ |& w- e1 W8 A s6 t6 j G2 I - gets(szMessage);
0 h& D( U/ f% w1 l - // Create the socket, and attempt to connect to the server$ u/ h3 P6 M* O7 a/ C
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);& c3 C! S. R; n! k. o
- if (sClient == INVALID_SOCKET) q$ N z) M! d! f6 g! f$ i
- {5 c" k2 @2 L y; p3 o
- printf("socket() failed: %d\n", WSAGetLastError());
1 F, B) H+ K# o d* Z - return 1;
0 g$ \8 _6 g4 v( p - }7 w. O' Z8 b( S' ~2 _
- server.sin_family = AF_INET;
. l" g6 G U# k4 T- J# o" k; e# H! t - server.sin_port = htons(iPort);
; U. @0 v0 r! i - server.sin_addr.s_addr = inet_addr("127.0.0.1");3 M4 G1 }& X+ s7 i2 x
- & g: L4 {4 K. c8 O ^
- if (connect(sClient, (struct sockaddr *)&server,& D* q: Y7 |8 O
- sizeof(server)) == SOCKET_ERROR)
$ V5 p0 ?& L% F - {+ U E* H- ]% q( C' r& U& k
- printf("connect() failed: %d\n", WSAGetLastError());+ S# W6 e: R6 S7 R
- return 1;
( F- A" A6 F( I) D) ^* w. @ - }
4 B! [' u8 ]& c2 v! A4 V - // Send and receive data6 j- z, w% \. c( s0 Y3 V
- ret = send(sClient, szMessage, strlen(szMessage), 0);6 z3 ` j! i5 B4 _! i2 X1 W
- if (ret == SOCKET_ERROR)
# _! Z f+ N9 v4 R5 T* c - {
1 z8 P* X% F" b& ^8 S$ a7 K - printf("send() failed: %d\n", WSAGetLastError());4 ^* Z8 ?3 ~, h% H: `- I
- }( h6 W+ y. x8 j; X2 Y
- else{
5 Y& A, @% H* u# ^: a - printf("Send '%s' \n", szMessage);
- Q% x( |% F4 V1 m% q" O9 ]. ? - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);+ T# ]0 g" O: {
- if (ret == SOCKET_ERROR){) T$ p" n2 O) I6 D& t0 M
- printf("recv() failed: %d\n", WSAGetLastError());3 Q" L q. t& V% ~* t% y
- }8 ?9 `- ^( A+ p: e' b8 {
- else{3 C$ I( G+ j0 l! G/ o# ]
- szBuffer[ret] = '\0';
: {; z) p) z( M7 B0 d - printf("RECV: '%s'\n",szBuffer);0 n( b9 V, U: Y8 i+ R
- }! u4 R. ~$ m7 q
- }9 s: p. w$ t* g/ w# ^; A
- closesocket(sClient);* J0 ]) o" [6 @8 X) Q
- 7 A$ l1 ~- O3 _; a0 s1 t
- WSACleanup();) ~8 F( P* b% {
- return 0; M. I2 U* M7 B* q
- }
复制代码 服务器程序:server.cpp2 @" i0 R* m |
- #include <winsock2.h>% f# @* D; x# I" ?$ q0 K
- #include <stdio.h>
' T8 m ?6 k0 y8 M I$ m - #include <stdlib.h>: D6 S# u: q, f) U! q5 v$ F: M2 O3 M
- 1 Y n$ i1 e* B, r/ \/ a+ |: s2 A
- #define DEFAULT_PORT 5150
7 X7 S ^& t; n" A8 W$ P" k3 W. u - #define DEFAULT_BUFFER 4096
4 k; A" I5 |" ]" W G* S6 @/ F - 6 p- r) u: r* H& Z" Z. O5 c
- int iPort = DEFAULT_PORT;
' E+ a C0 q# e2 e" Z( j' ]5 S - char szAddress[128];
2 I. W7 G% j( ]+ a) |) s* t
* j9 J' A" E0 D3 _( o' K- DWORD WINAPI ClientThread(LPVOID lpParam)
( x* V7 y4 H+ i! s, G. e1 C/ h - {
" J( y# E0 ?, N+ f4 H - SOCKET sock=(SOCKET)lpParam;
! ]! e) ^ t/ i) l( u3 {+ g - char szBuff[DEFAULT_BUFFER];$ z; v. t' \" \$ A/ \
- int ret;6 v# C2 }7 b8 R" T8 G7 P
- 3 f: ^0 w# c! O
- while(1)
$ h7 R0 y" x2 A - {3 h1 _1 P2 G/ v! f% u: k
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
8 a! j% o9 y4 v- ?3 h - if (ret == 0)/ R j$ c- v) p- k9 q% ?- B, S
- break;
0 r: _! |: Y* z, @ - else if (ret == SOCKET_ERROR)
% P* T3 k4 k- a" a" n$ a3 i - {
1 O( u. n9 }6 _ - printf("recv() failed: %d\n", WSAGetLastError());$ \ i ` S/ M
- break;
9 U |4 v9 V& I, s+ r; F - }
7 T0 x* ]5 U9 [9 X+ E) k' W. C - szBuff[ret] = '\0';% n2 @5 j+ w. r3 ~: S' i
- printf("RECV: '%s'\n", szBuff);
8 ^6 c8 M6 r8 p F0 h/ [ - if(strcmp(szBuff,"abc")==0){
$ w; r( W; f/ k- M. C; f: s - memcpy(szBuff,"Send the correct string!",25);6 `4 v: w8 D- y$ Q' E
- }
) p7 a( i e$ u8 }& k* A" ?* C" I a- D - else{
% `( u* \. D' S2 v! G: a \* | - memcpy(szBuff,"Send the wrong string!",23);
5 S4 w! P+ j3 c6 u ]# O - }: E. D' y4 `8 G( u7 J& y3 W
- ret = send(sock, szBuff, strlen(szBuff), 0);( ^$ K# `$ K3 L! [) y7 O
- if (ret == SOCKET_ERROR){: W( B# S; ]8 f5 Q/ N# _
- printf("send() failed: %d\n", WSAGetLastError());0 U1 ]7 z+ E* s& K8 h5 o
- }5 i. ?# y- @. a1 |/ J) K- r
- }
7 R# Z& g8 k0 Q- s5 T: d, Z - return 0;
8 j: T M- ~! \) H% P1 E - }
, |7 O. A! \ d6 ~ - ( V/ }5 e- D, A% _, y; V. w
- int main()
( {' S7 u T7 h; i5 Z& X+ T - {$ ^8 b* R: Q5 P& `+ \- M
- WSADATA wsd;
5 |7 v% T7 d; N% s - SOCKET sListen,
7 i7 ~( J+ G* k( r7 ?0 W+ A+ [ - sClient;
# Q9 v+ s! U- c - int iAddrSize;% t4 c6 |! E7 o
- HANDLE hThread;
/ f H- ?% _& N1 w+ p4 g( n0 ~0 K2 q - DWORD dwThreadId;- m7 A0 s4 n* }4 B$ d8 A& J
- struct sockaddr_in local,
4 ]: R% T( J U! H4 h$ c# P5 C; W - client;$ g8 ~% x4 T# K
- : U5 u8 E! N }. |) e9 U
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)( T: _: B9 E2 b# J. w, E- ]7 m
- {% ?0 _: L3 l/ d3 @6 \8 N% r, `
- printf("Failed to load Winsock!\n");) j7 m( _" x) }9 M" t
- return 1;3 |3 Z$ S6 {' P% Y
- }
; Y, |* E% Z4 w& s, G - // Create our listening socket
1 A: t `2 ^; x. I4 P' e/ W - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
0 q0 M$ D0 ^* g; J - if (sListen == SOCKET_ERROR)- e! u0 l$ j/ y7 R/ c! ?
- {+ @$ `- M, }7 c5 N
- printf("socket() failed: %d\n", WSAGetLastError());$ b; E6 I1 j7 _: x! ?+ J
- return 1;
- T$ N W% f+ h/ i4 P - }, c- G/ n9 T+ @ y- }* L* Y- V# ]+ Z
- local.sin_addr.s_addr = htonl(INADDR_ANY);1 k! {; r. y# J3 ]! h, `
- local.sin_family = AF_INET;) z( U/ {& v& T& |5 V5 x6 E
- local.sin_port = htons(iPort);
% Q; q3 R8 z9 N; H0 Q. R - * I& O b% T( C" F& M/ a* d8 Y
- if (bind(sListen, (struct sockaddr *)&local,! C6 T' @7 K* I! \5 W, H5 v! f
- sizeof(local)) == SOCKET_ERROR)' }8 P; M4 o8 w* T! L5 ^$ M
- {
' d- G3 @8 u, z' i) Z$ u/ \4 @# D7 T - printf("bind() failed: %d\n", WSAGetLastError());4 F* `: x/ } ]/ a
- return 1;
% V9 y ~* I* U0 | - }/ t/ C6 |9 m$ }7 J* B4 O" |
- listen(sListen, 8);5 {. |: ?, R- o9 x) G9 O9 @& G
- // In a continous loop, wait for incoming clients. Once one6 k1 b' d+ {: s9 w, M
- // is detected, create a thread and pass the handle off to it.8 Z5 I' x5 n) {
- while (1)
$ V8 q( C' X7 E8 Y - {, B" |$ v: A3 y* G' D: o0 x1 s" F
- iAddrSize = sizeof(client);
5 I" ?3 ~4 F0 D- c! R5 P - sClient = accept(sListen, (struct sockaddr *)&client,
- W; u% w7 J# @8 g9 ]8 U - &iAddrSize);
8 p" A( d6 `/ S/ y& b - if (sClient == INVALID_SOCKET)( m9 p9 I; X$ [$ R
- {
" I9 Y& v7 E+ u5 ]6 x: k% U - printf("accept() failed: %d\n", WSAGetLastError());2 S- C. \4 \7 c. a8 R0 ]
- break;) L8 a% [$ m9 h& H
- }8 z9 l. N7 A( w0 W
- printf("Accepted client: %s:%d\n",* x& D2 `0 Q+ N) i( |' [8 @
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));
# S) F0 e3 f _ X
1 [0 N; r# G7 z* F) }* f; G- hThread = CreateThread(NULL, 0, ClientThread,
$ w/ ~( \% y5 b) l8 O - (LPVOID)sClient, 0, &dwThreadId);
* _3 x" ~6 x M, G - if (hThread == NULL)8 z* m/ y K$ e7 u9 d# E
- {# I1 ^# p3 v5 v% \/ z! s$ h
- printf("CreateThread() failed: %d\n", GetLastError());0 M7 p# C9 o) k! [( w# |' b! E
- break;6 F/ {& e% ~0 C
- }
1 Q3 z0 U. z% z: G i- U! H! \ - CloseHandle(hThread);8 V+ {9 J; X3 B9 O* k
- }
! n' _ m1 k& \3 Y2 }1 l - closesocket(sListen);' m H! r; U9 Y+ @0 U& p5 d
- 6 k* i1 E0 q6 h# R5 ]0 ]- ]6 k
- WSACleanup();
$ b' {' H0 d1 U0 N+ s: U - return 0;* D: }7 _4 \/ Z; ^* p
- }
复制代码 / p# A7 P* I9 m1 [3 \% c, k5 y
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