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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。
) E; F( I: I+ o& L客户端程序:client.cpp
+ m. ?2 W% G$ [0 D4 t! @- #include <winsock2.h>2 D+ i( \ u- J) [& w; t- r+ K' ]
- #include <stdio.h>% ]: x# N# s* z' u& A
- #include <stdlib.h>
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2 G- a. k2 i: t& a- #define DEFAULT_PORT 5150
2 A+ j' f' \. B - #define DEFAULT_BUFFER 20486 ^: m2 a p- x, v" ^, a* n
5 n/ |, m+ C @" K- char szServer[128],
& i7 s/ B* ^. V+ L7 r$ C1 N - szMessage[1024];
& ~) g* V- I0 ]4 v1 s - int iPort = DEFAULT_PORT;
% i0 _3 D: k! T( A0 S- f& Q/ [ - 4 M* G+ \1 a5 Y' F
- int main()9 V4 `2 h: g( J* \
- {5 X( G, V) M) ?# L0 R
- WSADATA wsd;; X2 }% B4 F7 e, i1 C) O
- SOCKET sClient;
+ ]( D E% S1 C/ D - char szBuffer[DEFAULT_BUFFER];4 V* z z1 u$ |3 Y5 l- P* @
- int ret;
- z% [" j+ q6 Q8 c8 j - struct sockaddr_in server;+ q- A2 M: Z" q- l- s. o" e4 a! R
- struct hostent *host = NULL;
+ A, {% Z+ r. r } - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
0 U( C9 Z2 r3 R8 D+ _ - {7 f5 r# U# V& |- Y
- printf("Failed to load Winsock library!\n");& T! \. c' X" L0 D3 w
- return 1;
8 M o9 P% B5 b' ~# Y - }6 h" U' D! y8 [; V
- printf("Enter a string to send to server:\n");
6 B7 D4 @# D ?) }4 r) j) p+ s% U c - gets(szMessage);- r! q% j# x D; D& v" {& V0 Q
- // Create the socket, and attempt to connect to the server
7 J3 ]: c, a. u$ g1 B - sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+ Y% U3 z% v- ]. u) s - if (sClient == INVALID_SOCKET)
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- printf("socket() failed: %d\n", WSAGetLastError()); U6 e+ U2 t0 a# k# M# `
- return 1;
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- server.sin_family = AF_INET;
" O1 [9 n) e7 J- G: I2 Q - server.sin_port = htons(iPort);' d2 w# Z. p& ` w% z4 f$ W7 h, V k
- server.sin_addr.s_addr = inet_addr("127.0.0.1");
2 ]/ B9 `% f$ N" D/ H! E - + U: y+ ]- j+ w
- if (connect(sClient, (struct sockaddr *)&server,: M$ h! y/ Q" t5 Q' m+ n
- sizeof(server)) == SOCKET_ERROR)
6 w, p/ P1 X& u' D# b - {
# i$ ?" F9 D; j( x8 B8 @. | - printf("connect() failed: %d\n", WSAGetLastError());
" Y9 t5 S. x0 M - return 1;. W) j) W0 ^ H( u
- }1 M8 r, w6 _6 I, W& _6 P7 o
- // Send and receive data
+ A: I. t5 o: K e* V - ret = send(sClient, szMessage, strlen(szMessage), 0);
& c, y+ z9 h' ^4 r- D( | - if (ret == SOCKET_ERROR), ?0 s0 q, E4 I! G
- {
+ w5 l# s1 ~# D% S" ] - printf("send() failed: %d\n", WSAGetLastError());& X" v( ~: z3 I* o9 t
- }
: X) S3 n- i) {5 Q& w - else{
5 e: X" f. O! r% r' y* n5 L - printf("Send '%s' \n", szMessage);
- S! Q" }. J/ Q# ] - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
& u0 s' A( i& U1 o1 f - if (ret == SOCKET_ERROR){/ y* N1 Q! H u3 r# y/ j- t
- printf("recv() failed: %d\n", WSAGetLastError());9 Z7 r6 t2 Z0 H( C& M( L% M
- }
2 p1 }- N* z& B! r - else{
* f, w% e7 M6 `4 B+ b% c2 t - szBuffer[ret] = '\0';
$ ]; K% O1 @2 p" `) I - printf("RECV: '%s'\n",szBuffer);
6 E* V) S* h1 K0 G3 U$ G - }; X# f9 B" P1 Y' P: ?# b
- }/ h& \7 i: k1 h
- closesocket(sClient);
: q+ ]+ {* b8 r4 s
- n, S+ o0 D: A. S4 G8 B- WSACleanup();2 c# m$ K9 y) |- ]
- return 0;
0 n% f0 \ t$ v7 f1 Y, ], n& u* B - }
复制代码 服务器程序:server.cpp$ S$ P2 U) t# f+ A
- #include <winsock2.h>& i5 f4 O3 J3 a: @
- #include <stdio.h>1 @; q6 q' s9 F o- d
- #include <stdlib.h>* ~! Z* A, v4 ^" _6 I: r& @6 G; x; T
- # z9 U Y! e% k6 C( X
- #define DEFAULT_PORT 51502 i5 L# M7 g2 h
- #define DEFAULT_BUFFER 40967 O9 B9 T a2 C8 \$ M3 @
- / i- N. q8 N E! M6 \ z5 T
- int iPort = DEFAULT_PORT;
6 N0 w' d+ T1 R- p - char szAddress[128];
" D- {2 Z' I5 M" h G: ^. D# a# Y2 b
1 v7 h2 |1 m1 s B. d* C# T8 ~3 ]- DWORD WINAPI ClientThread(LPVOID lpParam)
( |( _- y% y; [: O+ ~ - {
0 B7 \7 n1 o }* q o1 `* | - SOCKET sock=(SOCKET)lpParam;
$ N9 N# f4 w) s0 g: W - char szBuff[DEFAULT_BUFFER];
8 |$ P4 a& p9 \ Z& V+ h( ^/ |) Y - int ret;. p Y% E) j4 i+ ]. C% f
) B" `, I* u- N4 \- while(1)
0 v; h8 ?1 x* ?) N' B - {
' x4 ?$ n0 o z& @ - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);( ~, q9 H2 K: G# H v5 O
- if (ret == 0)! E# `8 ]* }% L5 B/ r
- break;& x5 Z) I/ U5 H
- else if (ret == SOCKET_ERROR)+ k; e/ I+ g0 Z% W
- {/ l& _) q2 K! X
- printf("recv() failed: %d\n", WSAGetLastError());
F) h; G+ o. z4 d s - break;
- V6 _/ m$ w1 L# K9 W% J - }7 e8 X; F y' l* \. _/ E; g
- szBuff[ret] = '\0';
+ P; A+ O$ a w% o( `. a5 Y) r( X+ P/ x2 z - printf("RECV: '%s'\n", szBuff);( ~8 @! m$ u. C+ B
- if(strcmp(szBuff,"abc")==0){2 d1 x$ Y' ?) ^' U4 U6 F3 v2 e# l
- memcpy(szBuff,"Send the correct string!",25);% z& G; ]$ o* J2 ^
- }
6 q }! m a6 M* l& Q, r( { - else{1 F6 x+ ~4 u/ q$ S8 [2 T
- memcpy(szBuff,"Send the wrong string!",23);; N6 Y4 N. U8 W( [
- }" L/ i2 E7 r, q' s, J2 y1 k
- ret = send(sock, szBuff, strlen(szBuff), 0);+ s0 E) l, h1 F" l0 |, E
- if (ret == SOCKET_ERROR){
0 O5 P- L8 C/ F7 o3 j - printf("send() failed: %d\n", WSAGetLastError());9 C9 S) s3 v5 Y+ ~. T! u/ \9 j
- }- F* O% p. |: j `- [6 e( S+ q' h6 U% w
- }9 J) ^+ d+ \3 ]
- return 0;
: w/ m# g& q5 N2 C! O4 k - }
( q+ d+ l+ l' f* I
+ T8 g1 ]6 ^( B' ^+ K# X- int main(), R& o& [) w; D/ g1 `; a) k
- {
; d% ^1 |) T* o) {# A" N# Q6 D5 Y - WSADATA wsd;. P$ S' F; N4 l) p m
- SOCKET sListen,( t( B1 {7 s7 l) J* J4 x' K
- sClient;% T2 n+ O Y4 D
- int iAddrSize;% }" M/ h0 q* f4 D0 @2 V! z
- HANDLE hThread;
2 S8 X& ?4 j5 P- z6 o r+ `( g - DWORD dwThreadId;
" o6 c c' A! @ - struct sockaddr_in local,
) h; W, o: e5 m - client;
2 l# }; r5 X1 W7 E4 G- K- r
. @% m7 D9 s/ I7 V+ D- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
9 N$ ~/ I+ z+ i' Y - {
' o1 n! K2 `; k1 q( \ - printf("Failed to load Winsock!\n");
& e. F! g& k! d) C7 B - return 1;6 A5 [7 V3 Q( E, U$ a. \
- }
7 ]& ?' @) }$ ]5 K1 u. m& r0 X - // Create our listening socket* X% ~3 I9 E. M- B4 { V. K
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
, j; }# `" i# K - if (sListen == SOCKET_ERROR)
' P- O& k9 X* v# c - {
+ _6 b$ T$ E0 s _) \ - printf("socket() failed: %d\n", WSAGetLastError());
7 p; O* b0 s- s - return 1;
' ^2 X9 S0 P% u3 m. [) W' D5 _+ D - }5 ^; ?, ]' B) _& [5 W3 R! ?' a
- local.sin_addr.s_addr = htonl(INADDR_ANY);
# v1 ~) J' k0 I& ?2 E9 t - local.sin_family = AF_INET;
5 \6 T2 W+ [" h. F4 b - local.sin_port = htons(iPort);. q; }! f( j9 D. }7 ?
- 5 Q& Z2 A N$ J1 a P7 O
- if (bind(sListen, (struct sockaddr *)&local,# n X3 E+ Z( Y2 p2 @3 E8 o
- sizeof(local)) == SOCKET_ERROR)
' F5 @9 H6 u" E3 r: w3 t, o) H - {
% u# \! Q' W/ _3 Y1 I - printf("bind() failed: %d\n", WSAGetLastError());
% ? \! t' a R4 ~ - return 1;8 J$ |' \( F- L7 ?: |$ M
- }* ~ Z: D) G0 v: Q* d
- listen(sListen, 8);
& w& G& @/ F/ u& R - // In a continous loop, wait for incoming clients. Once one
9 ]6 V5 o5 u+ U( o) E5 e - // is detected, create a thread and pass the handle off to it.0 {5 f# Y6 c1 \& | W8 J- ?
- while (1)+ Q) Z2 [% H& r5 X
- { d$ m. b8 U% b
- iAddrSize = sizeof(client);
* m. y6 J' r1 C, L/ t - sClient = accept(sListen, (struct sockaddr *)&client,
: ?2 C# h% b; p' S- w9 b( y - &iAddrSize);
) }$ U' }% H( n - if (sClient == INVALID_SOCKET)+ D. `" T: e3 K5 ~1 w; g2 G
- { - v4 v; o4 z- q; X/ I3 e0 X
- printf("accept() failed: %d\n", WSAGetLastError());" x* M0 {0 l. ?6 ^! x, `& X
- break;, A1 Q/ Y4 Z4 J
- }
8 d' \, N0 p4 a5 q( Q$ b - printf("Accepted client: %s:%d\n",6 B! o* r/ J f) e9 S. p
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));
6 \% ~5 d; @' o9 {" R3 ^1 B, Q
1 I- A4 w% ]" s, l( s' Y- hThread = CreateThread(NULL, 0, ClientThread,- O. z- e( x S3 g
- (LPVOID)sClient, 0, &dwThreadId);# `( t) v5 _4 B" C. F; Y
- if (hThread == NULL)
8 {) S9 _, ?; S0 v: g, h4 H - {
# R! M/ A7 Q S d5 {" U! @" Y - printf("CreateThread() failed: %d\n", GetLastError());
; G% O9 c& B ] - break;( X" Q: r4 ]2 r. E
- }) t2 f% y7 ~0 ] u- [* U6 x' u
- CloseHandle(hThread);" v0 E, n2 Y+ J" q+ L
- }5 ]8 v" ~1 B& C1 L+ u- d4 l8 X% L
- closesocket(sListen);+ |) R, b# Z" @9 f M
- / O: @' z" a+ W/ u- T
- WSACleanup();
, Q; t) ?- Y$ R7 Q9 \ - return 0;. d5 ~* i. R( y; q+ Y
- }
复制代码
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