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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。! g7 X& }( [6 |4 w/ r
客户端程序:client.cpp
/ U5 y7 O( L9 _' V1 W$ v- #include <winsock2.h>
+ C7 ^$ S& `6 q - #include <stdio.h>
6 ?4 x. p2 p' e1 d5 W, ? - #include <stdlib.h>
* p& w4 s' h0 Z - - K5 P8 F0 P7 b) p. v
- #define DEFAULT_PORT 5150
) |! j9 T8 w9 c, \ - #define DEFAULT_BUFFER 2048/ j7 a z% Y0 q+ R
) @' O% J9 I7 O# S- V- char szServer[128],
4 c% `& u [8 a; q; g" } - szMessage[1024];) w5 A: \ Q8 ?! K; U
- int iPort = DEFAULT_PORT;
: h3 e: W. k' P2 o
; P* ~1 ?" `) E- int main()
/ e& S6 ^3 t- V) q' w& L; O - {8 ?1 \9 r# t( |3 ^3 j: n
- WSADATA wsd;" e6 o) G- t5 _" M j
- SOCKET sClient;' V( e/ K6 [1 ]
- char szBuffer[DEFAULT_BUFFER];
! {% \* X( d* f" y( V - int ret;/ `: O% K6 ` B* m6 r. o. T
- struct sockaddr_in server;
( y- D2 |$ o8 Z5 H8 V/ A - struct hostent *host = NULL;
) h$ R6 x9 l, @1 D - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)) q. H. S- d- Z5 [- C# z
- {
# H! @4 ^" U( F7 T4 f2 v0 X! O - printf("Failed to load Winsock library!\n");
) ]& O d( D$ s4 l( N" n0 T - return 1;
5 ] w1 D- C0 U - }4 s$ D* e2 B/ w9 H' E
- printf("Enter a string to send to server:\n");7 ]; j2 \; q% ?6 y6 ^- i
- gets(szMessage);! n* n6 M) k1 Z5 p8 R* P% B$ [
- // Create the socket, and attempt to connect to the server! ^7 f# ^: ^( f9 {+ V) G9 }* W* h
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);) l! s. @9 c) k
- if (sClient == INVALID_SOCKET)
7 `/ p, o- \# g" _: w9 f - {
4 G. W) h) A" F" P9 G - printf("socket() failed: %d\n", WSAGetLastError());. U" p" ]/ C+ y/ b) f
- return 1;
z+ D5 J& c: s5 f, A- `# v z - }
4 y/ ^! Z7 a) t8 A, C2 g - server.sin_family = AF_INET;
5 R! N) C4 I" U. g - server.sin_port = htons(iPort);0 a; X/ q) Y: }7 p( Y+ c. x# \& `
- server.sin_addr.s_addr = inet_addr("127.0.0.1");9 w* o( `9 k9 k7 I# v' I# W
# d( j* ~1 K) | \8 s* F1 n9 J- if (connect(sClient, (struct sockaddr *)&server,
6 p6 T8 |0 ] P1 G* y - sizeof(server)) == SOCKET_ERROR)! d. Z& B3 e" B( P
- {
. d: g4 s* f$ s) |1 Y n - printf("connect() failed: %d\n", WSAGetLastError());
2 S( K$ R' c/ G, _7 s a# M9 U - return 1;7 h9 \9 J0 u5 R# I( R& S
- }
8 l1 s9 G' K% g0 e1 l7 c5 u+ A - // Send and receive data
% T$ ]: U9 F# C - ret = send(sClient, szMessage, strlen(szMessage), 0);. y" W+ \' {& l4 k
- if (ret == SOCKET_ERROR)
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- printf("send() failed: %d\n", WSAGetLastError());
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- else{
3 s5 L% N7 S* @9 `& U }& @ - printf("Send '%s' \n", szMessage);1 ]# R5 a: L6 S9 f# c9 G
- ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
1 f2 k+ g9 U# ^ - if (ret == SOCKET_ERROR){' `& J; b& S4 J6 W+ L& m9 k
- printf("recv() failed: %d\n", WSAGetLastError());
) A, ~& ?# y6 q6 G8 X4 S; Y8 v* \& W+ ` - }; Z+ G; Z( M( w7 q. n& {/ _
- else{$ K7 O# ^. W4 \% {. Q& K
- szBuffer[ret] = '\0';" t5 u- ]0 K. _
- printf("RECV: '%s'\n",szBuffer);
/ e& e$ r( \5 Y6 @$ b2 x5 [ - }
9 H! _) g- z) B/ f) R+ p1 M - }
" i1 W: @ @, q( N1 X ~8 p! r4 T - closesocket(sClient);& ^6 }9 |1 Q! o* H) V; {: d
) S* |5 j" Q% R$ W0 i6 L- WSACleanup();9 o% E# w4 Z' t7 P, D3 w
- return 0;% A' s5 [5 u, `
- }
复制代码 服务器程序:server.cpp
p |; {% B1 H& P/ H; t4 R- #include <winsock2.h>2 u5 L6 B6 C4 U& x1 Y
- #include <stdio.h>3 U* J" a1 _6 J0 ^% L. L$ y
- #include <stdlib.h>
* [ U! @ m7 m+ T9 l( E! D1 i* R - 7 x; @, Z1 h6 f5 f" B) H4 E
- #define DEFAULT_PORT 5150; E0 j+ P& B* Q- |3 m
- #define DEFAULT_BUFFER 4096& W8 [( w3 c/ S6 _
( d. D' I" a+ i5 E+ Z/ w$ b# f- int iPort = DEFAULT_PORT;
' |, y8 m# ^. z; r) n - char szAddress[128];
! ~5 b; N% |1 D) C - 0 W. _5 E& s6 ?) c9 d; z0 R+ D
- DWORD WINAPI ClientThread(LPVOID lpParam)$ ~6 V$ v* I! B2 G# A. O
- {+ f+ Y" r, [( F4 v( b, C% @+ L
- SOCKET sock=(SOCKET)lpParam;
2 n7 y+ ?. o- P; p2 P% M3 [: O - char szBuff[DEFAULT_BUFFER];
& V2 Y5 N6 n% ^& V- I& a - int ret;- ~8 i. F9 d! \: o/ m
5 F+ N; v1 A& i7 a1 t, ^/ ~% k' s- while(1)
4 U2 p0 g- ^# e- l. Z0 b# Q - {
0 U" T Z: s7 |8 ?& X - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);3 K: b1 E0 ]4 a; T L/ U( ^; _
- if (ret == 0)1 L3 z. ~3 c$ U0 q+ j& R9 I# z
- break;( v# K: O( T7 Q* x1 z/ E4 j2 Q/ D
- else if (ret == SOCKET_ERROR)
, Z# O( |: A4 i$ @6 r! z! e" A/ @ - {
- _( {' t( Y/ }; U3 \1 [ - printf("recv() failed: %d\n", WSAGetLastError());+ M8 x6 m9 Z* _+ Q2 |4 M. |& @5 T
- break;
& D* G: K- Y' o- Z$ Q9 C - }
% @! J: [8 a3 n# \1 Q0 U5 D) c - szBuff[ret] = '\0';& j0 _' \4 m# Y7 O1 S
- printf("RECV: '%s'\n", szBuff);
" _& K& w+ J+ s- h8 Z) \, ] - if(strcmp(szBuff,"abc")==0){
+ L7 |: l$ \6 d1 l) E2 V - memcpy(szBuff,"Send the correct string!",25);
* ~$ H6 A' i/ i" v9 c) @0 ] - }( r* T& k5 }7 v# A. g% A1 _/ J: R/ Z
- else{8 G( t8 C1 i7 u! c
- memcpy(szBuff,"Send the wrong string!",23);
( \; K& b; U# U - }# H5 N6 O T ~. { C
- ret = send(sock, szBuff, strlen(szBuff), 0);
- Y/ e/ R# [# I( V, N - if (ret == SOCKET_ERROR){( F0 i& ]" f/ N! M( B* y! K+ B5 }
- printf("send() failed: %d\n", WSAGetLastError());3 F3 j3 J$ y# P. b2 {2 e
- }
- A. J7 y! {/ ^9 ^8 B( i7 d0 _7 E' L8 K - }- p8 J% m+ p/ q( @9 E* h+ J, L
- return 0;# v! O& c; v( F6 X: V( T0 y
- }* y% G: r; `2 [; `
- G1 c5 Y7 N S( M% O5 T
- int main()+ }2 d$ p4 ~( |) x! E! A. X& m
- {( C* e' ?2 f& ` V& ^8 ~0 c3 y
- WSADATA wsd;
) q( W- |0 w; U0 c, B - SOCKET sListen,7 N) t& H) _ |( W
- sClient;
% w* ~1 j3 k: w - int iAddrSize;
& d( K4 v1 E5 Y0 K2 e0 P# W8 h1 V - HANDLE hThread;* {$ z& m) y: P: `
- DWORD dwThreadId;
9 R; a- B9 |* L* o1 U - struct sockaddr_in local," q* |+ f' U9 t2 _0 T
- client;! v. L' Y. O8 Z
+ ?3 k8 z0 }, A7 F1 i- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
. t; ~3 @2 L1 s# a) H: M4 s9 G h \* e) C - {
) _" [* V, j( p* ]5 z1 ]9 { - printf("Failed to load Winsock!\n");( o) n; N4 Y& h; G0 ]
- return 1;
5 [ }7 F# o. f$ x; b# c g: Y% T3 Z - }# Q) l @" S7 c& X
- // Create our listening socket
( A5 b2 o" F1 d - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);3 v1 S$ `$ S5 _, \* Q C5 \, h9 ^% `
- if (sListen == SOCKET_ERROR)' ?! K; o, b; N9 k8 ]; _+ j
- {
" h$ t. W1 S- n8 n& y2 a+ p* ~ - printf("socket() failed: %d\n", WSAGetLastError());" T( s" F4 x9 M: x- t& H; {
- return 1;5 L1 L; f3 q, _" {: D! r
- }) v* s: q5 v$ Y$ r2 O6 ]* `4 w
- local.sin_addr.s_addr = htonl(INADDR_ANY);
: Z7 q! v0 W/ t- O - local.sin_family = AF_INET;+ j, X1 K8 ]& V2 L
- local.sin_port = htons(iPort);4 |% }. l& c, e4 s) U
( X+ _' C9 j6 ?3 I9 Y- if (bind(sListen, (struct sockaddr *)&local,; D3 ?. q3 J+ p( Z1 u# R. j
- sizeof(local)) == SOCKET_ERROR)
( f$ g& R: I* E& P - {
8 H& w' E" |( Y u5 `! i - printf("bind() failed: %d\n", WSAGetLastError()); m' T) m* F9 Z. b! Y h/ G
- return 1;" }+ X" O- T7 {2 v
- }# s- N1 H2 Y! G% g) M
- listen(sListen, 8);2 e! Y* l$ j& i1 P. d
- // In a continous loop, wait for incoming clients. Once one7 O$ s4 B* w3 U( l
- // is detected, create a thread and pass the handle off to it.
' d* m; J- ]7 S4 | - while (1)
; y4 g* s$ x; h* l" Q* C2 g - {, X: _3 s0 v7 {5 q
- iAddrSize = sizeof(client);
; @% M3 C1 a g# v* ^" q! |% [ - sClient = accept(sListen, (struct sockaddr *)&client,
; A {; ]' ]; |' Q z3 ^ - &iAddrSize); l# T$ b V3 [8 Q: G
- if (sClient == INVALID_SOCKET)/ {5 z3 d+ I5 `5 ^; f! U& W
- {
4 Y' ]8 x/ p3 ] - printf("accept() failed: %d\n", WSAGetLastError());
1 b% Q& W9 `% y6 b - break; r( f9 |" K. x, M X2 c
- }8 M; o9 m- j* c& \ k4 X
- printf("Accepted client: %s:%d\n",6 G( e+ u# ]% e( c6 o9 p
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));
3 n. {3 j! q2 C; C# T3 ~
& ]: Z# K+ f$ {' d- hThread = CreateThread(NULL, 0, ClientThread,
_0 C6 c; C2 y( W f2 m - (LPVOID)sClient, 0, &dwThreadId);
; G, D7 r t) _4 q9 R - if (hThread == NULL)
3 E2 g$ Z+ D: o! b, M* F - {
& R( {6 z5 V4 W5 m - printf("CreateThread() failed: %d\n", GetLastError());
" |* A9 a/ C& n3 v1 J - break;
2 C3 ^" X; }( U& v - }1 ]' W2 }* m4 e* i
- CloseHandle(hThread);2 u" t! s% M3 Q# a. w/ U
- }
8 e6 J* b$ F5 e) \) s d' a - closesocket(sListen);, b7 v& R. ^# V9 P1 p+ }
- - H, Y" Q4 Z: n7 @" c0 v" a
- WSACleanup();
1 d6 k9 J0 @" V: t9 H5 X* f - return 0;
/ ^2 D; J y/ B* N6 x0 Y8 u - }
复制代码
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