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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。
) [# G8 p! `3 g: S" L& S1 z客户端程序:client.cpp
5 H; t( D5 ?" m, a: i! ~- #include <winsock2.h>* |; o2 q, K' o" s: Q3 K9 }
- #include <stdio.h>: ?, G0 E; R) R5 B3 A' v
- #include <stdlib.h>
4 [8 j5 j/ F7 T5 f! `: {' E - J2 M/ d1 |4 {. d
- #define DEFAULT_PORT 5150+ ~7 M/ U- ?( E* t3 I0 y8 v) ?
- #define DEFAULT_BUFFER 2048/ \- t) ?/ V$ l k
- 8 F! |1 H$ u, ]+ k; C; k+ ?# D
- char szServer[128],2 s3 |2 f0 e* |9 _/ z5 N1 x
- szMessage[1024];
& I" Q# c; N. A% H' X1 x; [ - int iPort = DEFAULT_PORT;& V% g- Y( X: t! \3 H
- 1 w7 }* Q" N/ S) t' T
- int main()
d& Y2 V' Y/ P# x, X. `8 @' Z' l - {
. B7 P" c. z) n: _5 P: C - WSADATA wsd;
. }- K |/ _4 `; K/ e% G( F - SOCKET sClient;" u( C. V# h) M: {. o' i
- char szBuffer[DEFAULT_BUFFER];
% z7 m6 P1 x5 B4 n - int ret;
/ W& q* F6 t/ v9 h - struct sockaddr_in server;
$ d. \: `1 i4 S, W' v, R - struct hostent *host = NULL;
4 w8 U# d8 d g - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
( ^; A; n5 X" [3 D, P$ @ - {
) E7 h5 N i* [6 g! j2 b - printf("Failed to load Winsock library!\n");% G7 H, @1 v/ ?- E. v; G2 W- E9 K5 y4 r
- return 1;
2 y6 }, w5 H( D2 R. x$ D/ P - }
) z! k1 A8 X, {( P+ j6 G: n6 P - printf("Enter a string to send to server:\n");
) ?+ m) N1 I: s! Y) ~0 E# T( r7 c9 r - gets(szMessage);! e Z, L+ p+ w" ^! ]& k* K
- // Create the socket, and attempt to connect to the server
+ m# [ t0 o& B& i! R: \# V* f9 b - sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
% @9 a: p* X! W1 k+ _ - if (sClient == INVALID_SOCKET). f z, }9 }; a6 a+ r& k8 X
- {9 m4 q* G# e' \6 y- i0 ~
- printf("socket() failed: %d\n", WSAGetLastError());* \: a9 p' `' b( y" {
- return 1;
: s: R7 B+ X1 ^9 F) T$ Y7 ?- C - }
; X: G3 {( X" X' L W g5 z, t - server.sin_family = AF_INET;
|) I7 f4 e$ S - server.sin_port = htons(iPort);
( U; z X) i$ x2 } - server.sin_addr.s_addr = inet_addr("127.0.0.1");
$ F2 E4 H/ ], {& F3 q" ~7 _) x. q
. k, n1 f! s" e6 l- if (connect(sClient, (struct sockaddr *)&server,5 }1 R) J, ?' J; n- ] F( V7 Y3 t5 m
- sizeof(server)) == SOCKET_ERROR)5 X! U. V3 _9 G) Y% v
- {5 l8 b) C9 I5 B1 C
- printf("connect() failed: %d\n", WSAGetLastError());
) q9 P1 P7 @% ]$ i - return 1;5 s, G2 N' ~2 j, ~1 Y* D
- }
! F- E" Q7 Y: ~% D) B. j& W - // Send and receive data
) M& a: q! i% l0 U - ret = send(sClient, szMessage, strlen(szMessage), 0);
& o% K+ @+ ~7 b. H$ K3 z- _ - if (ret == SOCKET_ERROR)
/ l1 J m. [+ T7 l$ {% F - {( x: g$ q* J: W& ~) T
- printf("send() failed: %d\n", WSAGetLastError());7 D+ a3 r, S, T% |$ m* Z5 A
- }7 V' Z! D' P" a" z: j/ y
- else{+ F$ G" @0 [0 m$ f, j
- printf("Send '%s' \n", szMessage);
# J* z4 M2 H) r5 J0 z - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);- C6 V4 o+ X% u6 O: V
- if (ret == SOCKET_ERROR){# d& W: \# v' e
- printf("recv() failed: %d\n", WSAGetLastError());
3 O$ \& M) A, W - }4 i9 d9 O3 K5 k. g, N- l4 Y
- else{
: {; H3 H" s0 ^! i8 a! V1 U3 O z - szBuffer[ret] = '\0';
9 A$ S6 Q& N' n8 v5 }7 \ - printf("RECV: '%s'\n",szBuffer);
, t3 z; I2 S% ` - }
, I! e4 D8 }. m( z - }% g$ o* d$ N( f& a# y7 v1 t" u- }
- closesocket(sClient);
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- WSACleanup();
7 {6 v6 b: y2 R/ I - return 0;
: ^. a9 u" k. I* P3 q+ j7 ~6 g! i# o - }
复制代码 服务器程序:server.cpp
' C6 C4 D# _" G& N1 g5 \- #include <winsock2.h>
% r9 A& z* ]9 r) q2 L; F6 {: H' o, J2 V2 | - #include <stdio.h>! h$ E& d/ ]! l" a2 w1 u
- #include <stdlib.h>
& S% h! k9 {: N+ D8 {. V" e( o1 D' r - 1 t/ V& k4 m6 Z j" D6 s
- #define DEFAULT_PORT 51503 t% s/ [) a# w6 H* h% X
- #define DEFAULT_BUFFER 4096. T! ^" k% R7 s3 i2 l3 I8 k$ \
" J4 f: ~/ y$ X; ^* X( O6 T% D- int iPort = DEFAULT_PORT;
% U' K/ Y8 B& l( }3 P) n - char szAddress[128];
6 M9 A5 y" g# O" a6 s
' ~; w# @: z9 h# _$ T! G- {- DWORD WINAPI ClientThread(LPVOID lpParam)
5 r! Q2 Y( ^" z8 ?! v* i - {
: T. r7 W; b, @* G - SOCKET sock=(SOCKET)lpParam;
! P" U% @& b4 s$ U' B4 N4 N, n3 ? - char szBuff[DEFAULT_BUFFER];
" N: P0 [5 B# }7 m7 Z - int ret;
& ~& J: N2 ]- r" \% b; r: }! {( w. ^
2 z7 z7 p/ b8 P) q# p- while(1): ? `9 {6 y4 i$ |
- {- N: L ^; E5 h' ?( F: F: b
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);# _0 W2 ? j: ?+ v8 R( v1 o: Y
- if (ret == 0)
5 e) g0 N1 ?0 R0 k8 C* ]6 A$ N - break; n; s3 x! C$ w& s& s6 G
- else if (ret == SOCKET_ERROR)& i8 _8 ~$ f8 Y3 q8 b) _. ?
- {
% d2 s1 u) v2 }( V% L - printf("recv() failed: %d\n", WSAGetLastError());
- M; f& o0 t9 j' |6 V - break;
4 u8 _2 [4 G1 P7 \ s - }
' O" @+ e! S+ g, @ - szBuff[ret] = '\0';! _/ q& a: L! N" F J9 w# R" K
- printf("RECV: '%s'\n", szBuff);
0 T) I( y6 T* b - if(strcmp(szBuff,"abc")==0){5 C) i- u; d5 d# `- {! y2 E
- memcpy(szBuff,"Send the correct string!",25);. X) L" E7 v5 c9 z* U. k9 J
- }' Q- U6 T1 p- P2 J) t3 q
- else{. I% A9 H9 n# ]/ f1 q* V
- memcpy(szBuff,"Send the wrong string!",23);
& m2 K% \* f, Q - }
6 b. S& _# H8 d. y - ret = send(sock, szBuff, strlen(szBuff), 0);
- t/ P7 ]6 \3 A" |1 T - if (ret == SOCKET_ERROR){
+ I8 U/ v8 V' X' h6 e' g( ^ - printf("send() failed: %d\n", WSAGetLastError());
: ] L2 r+ g, |1 g7 Y - }
+ P8 Z( _+ z0 d8 W - }$ v0 @: c5 T- e6 f8 Z8 X
- return 0;
2 m" \ ^4 x' j4 v8 G% H" u9 v% u$ \- Q - }$ V* Q; w! X t% {4 u
- 5 j2 e% X9 b3 e+ N
- int main(); w8 A" m1 G& s
- {* b- P1 V- H9 P; r* y
- WSADATA wsd;
1 J5 F9 A! G* M+ }) r - SOCKET sListen,
3 j2 Q/ ?2 k4 t6 F/ T: m - sClient;
% ]5 b8 `. d# D; h7 U0 L - int iAddrSize;7 w" E$ @/ [$ X2 Q
- HANDLE hThread;/ y) a/ K4 g& ?1 y' \$ U! w
- DWORD dwThreadId;! v' h5 h' x9 Y' x9 ^ l; [
- struct sockaddr_in local,
7 {7 e3 B3 m$ T+ F2 W) J$ w# x - client;
! F% w6 [2 b4 ?% W+ a - % |, u6 p1 B+ L, ^' H/ u
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
$ ]( c% L7 ^4 U+ s$ k9 k3 V - {# B7 i; i, K1 v/ P* S
- printf("Failed to load Winsock!\n");1 y6 |6 |5 V4 J, x- H% {" U7 M
- return 1;. l1 j2 }5 C8 K; x6 b, M9 x+ d3 S) C
- }' ^* I( `3 o& }6 W$ @5 f
- // Create our listening socket
+ E6 o+ w( G$ A+ y0 |2 T: G: w - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
9 E( I" M2 h* w2 S& q0 S3 ]" Q - if (sListen == SOCKET_ERROR)1 c# n: [ A( C, g- `* k8 m3 Q3 t* \
- {" v) _, Y6 W1 Z$ C
- printf("socket() failed: %d\n", WSAGetLastError());
+ u, h5 i! p4 X$ k9 Z U% {0 c% Q( L7 H - return 1;& D" n( L2 y/ B9 T1 g; t& Z
- }% \: j( m! y/ ^7 i' i6 }" o0 b2 A/ L, f
- local.sin_addr.s_addr = htonl(INADDR_ANY);8 ^, p! ]6 h7 b# Y; [5 ?) z9 B0 @
- local.sin_family = AF_INET;/ Z/ Z, E+ u4 S3 n6 ?* H' c8 a& n
- local.sin_port = htons(iPort);* j; W$ N/ `* t- i
/ b: z/ @$ p6 `$ G- if (bind(sListen, (struct sockaddr *)&local,/ ?" Z, ], i; x( `8 B* f
- sizeof(local)) == SOCKET_ERROR)' b9 e/ \. ?) I6 O3 q r
- {( r; t4 X5 t. U% }9 V M- r, L7 ?
- printf("bind() failed: %d\n", WSAGetLastError());
' R" e9 m: w' { - return 1; p$ e8 g& L$ y) r: T# D
- }0 `) N5 F& J' r, R
- listen(sListen, 8);1 A! w5 v8 I. O& z* \- X
- // In a continous loop, wait for incoming clients. Once one( @/ ~; R1 _3 O9 [) U
- // is detected, create a thread and pass the handle off to it.' p; x; N: ^2 t9 U$ T
- while (1)
7 ]6 r% w( j$ x+ m: S8 x/ P - {
8 K2 _3 Y4 ]& z& W! i - iAddrSize = sizeof(client);
- _, H) Z$ M. G: r. ` - sClient = accept(sListen, (struct sockaddr *)&client,
* v8 s4 E7 L1 I5 u6 l" j - &iAddrSize);
/ M o; o& K( p5 q - if (sClient == INVALID_SOCKET)
) ]# b3 W, C4 C! | - { 4 H4 p9 T# q0 U Q8 D+ u
- printf("accept() failed: %d\n", WSAGetLastError());
# {" g, I7 n. {6 t: |% ]2 N- ~ - break; V: t3 r7 T& i: A) A
- }+ J: l/ }5 M9 l7 m$ j q: q
- printf("Accepted client: %s:%d\n",% Q5 G. j4 O& e$ Z" O% S
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));
: {5 ^& N: ?9 L- ~6 c1 w7 p1 P - ; ?" P" P) a, Q+ m- F/ p
- hThread = CreateThread(NULL, 0, ClientThread,
. i* @- H% G- M% z3 q* {. B$ ^ - (LPVOID)sClient, 0, &dwThreadId);$ ]) t8 _# V) d
- if (hThread == NULL)
8 E. `% Q+ H) _' g8 q0 t - {
1 S/ ^* H5 n8 A5 k* ?& V8 p* u( ? - printf("CreateThread() failed: %d\n", GetLastError());6 x9 N Y3 A7 u8 D! r
- break;
6 _1 l8 k; m5 M- g5 {6 O - }
) ?& v# k' s) P - CloseHandle(hThread);
( M8 I' F; Q5 N4 O - }$ g8 W! D1 t/ D9 X
- closesocket(sListen);
3 V" Q6 \, V; U* }% t -
8 i8 K7 R" ?- j# y - WSACleanup();
l" |% g1 C! g' \9 n9 l$ [4 x3 p - return 0;
$ t( G8 ?+ L5 x0 { - }
复制代码
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