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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。+ L( s% C. s: N( j
客户端程序:client.cpp
9 [8 H3 x! A# M- #include <winsock2.h>
& ^- D ^1 D1 N) m0 W( @# h1 ?0 `, E - #include <stdio.h>% g4 t1 J: o2 u/ I' k8 n2 |5 N
- #include <stdlib.h>
: E% l3 O6 C# W% p- W - 7 f+ P% t; L6 x' m
- #define DEFAULT_PORT 5150
0 B* r, W( U) O# k! { - #define DEFAULT_BUFFER 2048
( w" z+ H0 S% @% {$ H) h$ R
; z" e$ k* T! J( j- char szServer[128],
9 O( V5 W) S9 T: K- e - szMessage[1024];
3 k/ g) g/ b: M: O! \7 C - int iPort = DEFAULT_PORT;
# W, a. @* ^. t! T% C- t% D
+ M1 I' g, ?' F" ]1 `8 c/ T- int main()
6 {4 @* ~0 _0 h$ k - {/ I% T& C; Z# [ j% Q
- WSADATA wsd;
) a( @# [" K( W/ }/ K8 s - SOCKET sClient;0 L+ Y% L. e* t1 ?- g$ W
- char szBuffer[DEFAULT_BUFFER];
5 B. O8 p# H( ~8 f/ Q1 | - int ret;2 c8 Y" t, C9 E& i) i1 \
- struct sockaddr_in server;
6 v6 G3 d9 W6 j: V3 {9 z. a - struct hostent *host = NULL;
2 z3 t1 i9 r0 u& u2 d1 V4 s8 ~% h - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)8 I5 V, G9 d4 `3 V. ], w# @) P
- {
5 B" R" G/ W. Y, y% |0 ] - printf("Failed to load Winsock library!\n");
& `+ y! U2 S1 e" g - return 1;, B$ `& N: I7 j- D
- }
, h# @' Z: `6 g5 d8 n - printf("Enter a string to send to server:\n");# B# z( \* W( E; [$ _) J: v d2 M
- gets(szMessage);
/ Y& z. L% x* e3 W! C/ B - // Create the socket, and attempt to connect to the server9 ^; p# s! G0 X+ U1 K3 a0 y- M
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
" _0 Q3 v. Z+ r! _ - if (sClient == INVALID_SOCKET)4 z) m0 j5 `/ |9 ]: F6 g
- {* h# d& z; e2 I$ L- U! j
- printf("socket() failed: %d\n", WSAGetLastError());/ `* B. b+ j+ P3 N4 n0 K
- return 1;
% t! p8 [- [5 `4 d1 S6 s - }
4 d0 f+ j% C( v# o - server.sin_family = AF_INET;& I- `6 E' A& o% @; N0 M' h- O. `' F
- server.sin_port = htons(iPort);
5 Y6 M. S0 k( p% a' b! Q - server.sin_addr.s_addr = inet_addr("127.0.0.1");
! I X$ z6 o* [ - * }8 W! ~' V! N, S/ I; `
- if (connect(sClient, (struct sockaddr *)&server," }1 @, ^+ T6 q9 N
- sizeof(server)) == SOCKET_ERROR)
. @. \( C/ g D7 B! V+ @* I+ y4 D - {6 Z; w, O; t8 S) @% U0 }+ y4 f
- printf("connect() failed: %d\n", WSAGetLastError());; L* r5 }1 v' Y4 O+ K0 g4 k3 A
- return 1;: A6 l) ?3 y5 m. J9 r; X
- }
3 m$ B2 r! n1 g3 c, F; a. j# U - // Send and receive data
/ V0 s4 Z0 `. D7 R6 a - ret = send(sClient, szMessage, strlen(szMessage), 0);
* l k% j! M. {3 a' c - if (ret == SOCKET_ERROR)
( Z- v& F J! z" i7 u$ N3 \ p: l9 u - {
" F4 n1 }" J4 D0 X - printf("send() failed: %d\n", WSAGetLastError());
" N0 q4 q: X4 i1 \$ ^7 m: e - }4 B' k& W* o9 j1 S) r# U; Z4 ?- h
- else{
7 F H/ h* e. F1 W- F4 Y$ R* n; K - printf("Send '%s' \n", szMessage);9 t" Q1 d2 D* ^( D. [# Q
- ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
) H5 X# v3 U+ w' }+ D8 [: z - if (ret == SOCKET_ERROR){+ i6 N9 A' m# B! m8 [' k
- printf("recv() failed: %d\n", WSAGetLastError());
( q0 M- G9 y* ]. U& |/ p - }1 h9 P4 y: O- a
- else{- f; o9 s- ~( q( g3 s* T- y
- szBuffer[ret] = '\0';
! |6 F" ]8 H' f! `+ M" @7 M - printf("RECV: '%s'\n",szBuffer);
% j! ~' v. z' \ - }
' l1 D. ~, ~( R - }8 H; a; A$ c/ e5 N; C8 M
- closesocket(sClient);
) i) o1 I$ a$ [2 I/ ]
% z4 Y1 h7 m1 S1 {3 Y- WSACleanup();
4 n' b4 W; L ?: l: V" D - return 0;# F- Z, E8 P& E2 B8 w6 L4 P) ]. f
- }
复制代码 服务器程序:server.cpp
% F, X7 D/ k8 D* h9 m- #include <winsock2.h>4 H5 ~2 `$ @! c3 r) Y0 x6 k! e
- #include <stdio.h>
( ^" D5 Y- e8 ^' I% {: q# I - #include <stdlib.h>
5 L9 {$ a/ P0 G9 G* m - + D! }2 y' \) i. z- B% D
- #define DEFAULT_PORT 5150, I7 x) V. T8 m$ F. P7 M5 Y
- #define DEFAULT_BUFFER 4096' \# {" Q+ u3 p7 r
- Y8 s$ y/ O2 n6 F% Z
- int iPort = DEFAULT_PORT;
3 F, V3 q" n# ~( `. Y4 v9 L' ?4 F - char szAddress[128];. z0 \6 Z) I9 r" U1 q
- 8 ^6 H/ `# H7 I: p. D! ^
- DWORD WINAPI ClientThread(LPVOID lpParam)
: S% i% f! C9 J8 Z& B) c. B- Z - {
$ |! E, j9 b6 L6 A - SOCKET sock=(SOCKET)lpParam;, a! r0 n5 J) f0 r5 t: k6 M# Z" _" C; p
- char szBuff[DEFAULT_BUFFER];/ `! d% H* K- e: r+ |, _
- int ret;( S6 ?, M, s6 s7 H
! V9 l' C2 A2 c. f; ^7 `" v- while(1)
@: R& w1 g9 S# y - {
! S7 w7 _* |1 Q/ o% r( N. E - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
+ `# d0 Q* J3 |* ]' i - if (ret == 0)% a' l0 Q: K% o) f% T
- break;! \4 X2 h- b% f8 P" a0 ~
- else if (ret == SOCKET_ERROR)& b, w4 V6 W' w( \4 y7 G, Q7 `! _
- {
4 S* @) ^5 k3 F - printf("recv() failed: %d\n", WSAGetLastError());" L: K2 L- {8 p7 m+ D3 W) q- h
- break;
* Y7 P, S% V/ k! \; e( [7 y0 ? - }3 {$ w3 A& G( u
- szBuff[ret] = '\0';+ q( X; N6 G) b. y8 T" Y( q; V- o
- printf("RECV: '%s'\n", szBuff);
4 V6 k* @. M# X( Y" x$ v1 ^2 F - if(strcmp(szBuff,"abc")==0){
* l: w4 I$ j. n+ A4 ?# y- t: b6 H - memcpy(szBuff,"Send the correct string!",25);( D) [' d- `7 y/ g3 U
- }4 V( ~& ? h/ R) m# t% b5 I& g& d
- else{
" `- ]: {& x( ?0 U - memcpy(szBuff,"Send the wrong string!",23);* s" x* R/ f8 k8 n- o% r7 Q
- }
( ?5 A5 Y! K( S) v4 c! L( } - ret = send(sock, szBuff, strlen(szBuff), 0);
m# B. _6 m9 i6 H; T - if (ret == SOCKET_ERROR){
( c6 e1 K& Z* h% |/ M - printf("send() failed: %d\n", WSAGetLastError());" N( J" q: e$ g. Q
- }
, ]# E7 `; p: k, E( f( I: Z& X - }' {& y7 f$ q# _- n' B: @. K! x4 J0 b
- return 0;
5 G; t# }( D0 a1 o4 v - }
4 v$ h' s) F1 q
# X9 r# `& d; D& n( g& Q- int main()* ] w9 ^4 K; E9 e) G% `4 Q7 w
- {2 W9 G A& t/ k" v8 ^( o2 o
- WSADATA wsd;
6 s2 j5 l' f* ` - SOCKET sListen,
0 i4 X# z* p# r/ v" g# c+ _ - sClient;5 B1 Q/ v7 g/ k+ a4 W/ C
- int iAddrSize;
( S+ E6 \2 j8 }8 r9 v0 H7 J: b+ _' H. l+ l - HANDLE hThread;
* z- N/ Q+ ~$ F2 Y, C6 N" f2 U - DWORD dwThreadId;
$ F* d- v0 Z% Y7 c! ~ - struct sockaddr_in local,
7 l& E. C1 B- A y9 E+ [8 x - client;& A, r9 y& b7 U* L
% H5 m9 @* u# n; F# |. Q- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)! l( W# j$ ]& T- j5 [2 s
- {
7 N# ?9 ~3 W2 X! ~# p - printf("Failed to load Winsock!\n");/ Y" l. ~, f8 E) s# r
- return 1;
+ O5 _6 d* _6 ]/ ]& g - }
0 F& b3 E; f9 R( ]9 f" U1 _$ E - // Create our listening socket
6 e2 p+ X8 H9 @& w" o. j- w) f - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
+ D# h( x7 ^1 B8 z; Z6 b0 u - if (sListen == SOCKET_ERROR)
/ B, i2 `$ X0 o1 [4 S- w+ M - {# l5 H1 j! S/ D$ l! N
- printf("socket() failed: %d\n", WSAGetLastError());' _+ [$ t* k& C: {( F X
- return 1;
8 x1 ~+ P" |5 l0 B: Y6 J/ x - }6 j0 J8 A; ^" @7 Z
- local.sin_addr.s_addr = htonl(INADDR_ANY);
) y h8 \: D$ x! x, L; x- ]& ? - local.sin_family = AF_INET;
" [, B3 e2 L6 I. ?7 v/ b0 |/ N - local.sin_port = htons(iPort);/ f8 o x9 D3 j& S8 v
- 0 c) g& v1 ~2 `/ H. |: O
- if (bind(sListen, (struct sockaddr *)&local,$ a$ b" h8 o. ~1 |6 ?7 m8 q" ]" i+ T' y
- sizeof(local)) == SOCKET_ERROR)7 H2 ^/ L. v: v# s
- {0 j9 Z8 |$ ^5 }2 E
- printf("bind() failed: %d\n", WSAGetLastError());
4 D8 H( M; R" ? - return 1;
% O* E$ H& p* A6 I8 a- d8 p - }
, g7 w' m# ]2 F% F1 r - listen(sListen, 8);
$ v2 m" x# {8 ^" ]7 i - // In a continous loop, wait for incoming clients. Once one
* A9 g- ~2 B. G - // is detected, create a thread and pass the handle off to it.& p* O8 H' [: e+ @0 d
- while (1)
- Y% S% X8 M6 |' r - {
! v, S$ T9 Y3 \0 X1 F - iAddrSize = sizeof(client);9 W% y% i( x$ o/ s& t9 }
- sClient = accept(sListen, (struct sockaddr *)&client,
7 i# `% {2 x: D+ g - &iAddrSize); . w1 D/ y4 f2 n' T3 K/ L2 H+ _
- if (sClient == INVALID_SOCKET)
& m2 Q7 ^, C3 h: [) F; h - {
- ?. T+ W: R$ H& U% I' d% s1 U - printf("accept() failed: %d\n", WSAGetLastError());& p8 I2 j9 W- s+ g& A- [8 M
- break;7 w3 s4 t- \5 I/ e5 G
- }( b6 F: w' N2 u9 F9 r$ U' o
- printf("Accepted client: %s:%d\n",
; Z8 V- Y3 e2 j* l$ j# P - inet_ntoa(client.sin_addr), ntohs(client.sin_port));$ L& l$ n2 D- L# R
# T# t) \. |/ C' X- hThread = CreateThread(NULL, 0, ClientThread," O4 j( f h9 y* J4 {
- (LPVOID)sClient, 0, &dwThreadId);2 t' H2 x2 Q; E) P1 e
- if (hThread == NULL)
1 U+ n- f: k* ]; q - {
- W# \& E7 P. V* G - printf("CreateThread() failed: %d\n", GetLastError()); s. K. F9 ]/ M
- break;
1 ]# n- L, V. e8 a4 T" J; Q - }! c) c6 C: m4 U, D& \
- CloseHandle(hThread);
# l6 ?, z$ y/ D* C0 ? - }: W+ ], O& O4 Q% T5 N
- closesocket(sListen);
* {/ K7 M4 `# K1 x6 H; V. W+ [ -
5 w' a: D2 K; X, @$ [! u' ? - WSACleanup();/ }! a8 v" I* x
- return 0;
$ o9 ^0 V5 E' |4 `7 g' P - }
复制代码 3 H% x! w/ K" I" e" F, f( p
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