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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。' ^& ~% @3 |- o8 Q* A
客户端程序:client.cpp
/ T V, y* Y: M- #include <winsock2.h>& H( x3 Y( H- K# q) `$ b
- #include <stdio.h>% ~- A G* B8 A
- #include <stdlib.h>
- X3 k6 S( @* k) N2 w e |; F - 8 k8 m7 J# M# J5 R) o
- #define DEFAULT_PORT 51500 w, C0 A6 n1 V+ v' l8 \, K
- #define DEFAULT_BUFFER 20485 @: r& Z/ W( R' t
- & l% t% l0 a) j {1 D
- char szServer[128],
0 s7 ~9 u, Z. x, I: E5 X& I( P+ _* b7 Y w - szMessage[1024];4 z) `9 y7 f, U
- int iPort = DEFAULT_PORT;
: G- q9 u S, O. [- q& U" d+ H - 3 D! F+ z7 T9 {- y% L7 | Q
- int main()
1 H" V8 g- ~$ G# v9 @6 W ~ - {6 A+ A0 k& K" W7 K8 S* E# T
- WSADATA wsd;, W6 z2 Y1 e1 k% A' T% d
- SOCKET sClient;9 }( F; g ]- _! ]# c$ |) C6 O
- char szBuffer[DEFAULT_BUFFER];! u$ |3 X/ N# N* t- c2 \
- int ret;8 P$ j+ |0 _0 \' W, z
- struct sockaddr_in server;9 A+ P4 D3 z' p* ~, @& o( t8 J4 d) @
- struct hostent *host = NULL;
# h. ]# w# f8 Z: G - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
, W4 U1 ]: E8 ~8 m8 w6 w! y/ I0 x - {1 O4 u( G" X% R) R8 w& E" X
- printf("Failed to load Winsock library!\n");
+ @1 C8 S9 `1 Q( D1 r$ h* ` v - return 1;
! d: H/ n& m7 g - }
9 X4 Y* m' m. i - printf("Enter a string to send to server:\n");8 z' ^* @4 L9 {( p
- gets(szMessage);# v+ \! I+ W' \. x% o
- // Create the socket, and attempt to connect to the server9 J- [/ @/ q7 q1 t
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
3 x4 I6 `3 b0 T) a! `/ [1 A5 G - if (sClient == INVALID_SOCKET)
7 \6 w$ _' d# W" ^0 F+ h - {2 C/ T! \' t8 b
- printf("socket() failed: %d\n", WSAGetLastError());
! ~4 x, {' B1 O# [' ~! q0 Z - return 1;
5 Q- @' F: D& s- W4 _0 y8 |2 J - }. I# V. W$ I5 f7 A( W
- server.sin_family = AF_INET;
& U" q4 w" ^. L6 D3 W! }. }" k& W - server.sin_port = htons(iPort);. U% K" R8 b( o: h6 g$ g
- server.sin_addr.s_addr = inet_addr("127.0.0.1"); b* }! \4 M) S( h8 ~! [; i
% D7 K' T R9 o: T& M2 `8 a' \# M- if (connect(sClient, (struct sockaddr *)&server,
7 M1 C( P. F0 I6 J) p/ d* v% f& y - sizeof(server)) == SOCKET_ERROR)6 W9 i- \9 j6 S0 s" g' S, h
- {
7 c% c" D' R7 J0 B; k R8 V - printf("connect() failed: %d\n", WSAGetLastError());* n$ G: y. s* _
- return 1;
+ c3 h2 h. e, o* u" L! g( V% V' n$ \ - }
9 D: h) M' H0 l. ~$ Q4 c( Q - // Send and receive data
5 N+ T8 e( J- G+ j+ E - ret = send(sClient, szMessage, strlen(szMessage), 0);% F7 |9 `, n" j* l" W
- if (ret == SOCKET_ERROR)2 e* n, L j' B& \) E- f
- {
4 ~" s$ j: z$ j* @3 P" \ - printf("send() failed: %d\n", WSAGetLastError());$ t% r! @" ^" w. D+ P- j0 ]: ]. h
- }; }! s& M3 }- T5 r5 ^
- else{
4 g4 k% z h4 c8 j; l: C8 P - printf("Send '%s' \n", szMessage);
7 c6 [3 M5 }: O: L - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
* E& X( V+ d# d! y0 _ - if (ret == SOCKET_ERROR){
$ a! m! J; ~7 f# N# B - printf("recv() failed: %d\n", WSAGetLastError());/ C5 r, \- q. H2 z0 t4 x
- }5 \7 c( ], T# Q. W$ u4 o
- else{
0 b; \% o4 O3 e: X* |" K. Z - szBuffer[ret] = '\0';
' Y% F. y: J9 J- L - printf("RECV: '%s'\n",szBuffer);
2 A" ~8 @) N' h% | - }
9 ?9 N7 p' P+ Q' o" R - }( ?7 K! s+ L; I& m
- closesocket(sClient);
! l% \! h1 G- ]5 j
. Y7 y) Z1 T! S3 z6 F- H, y- WSACleanup();& I3 y( y0 B, t) Y/ j- Y
- return 0;9 j; {) ~: n5 ^' [* `
- }
复制代码 服务器程序:server.cpp
% i+ Y( T( A5 x2 D& k: q6 ^ |- #include <winsock2.h>' i; Y; |7 K' R3 M# A$ l
- #include <stdio.h># j# E. y! a7 V7 ?6 m# |/ w
- #include <stdlib.h>* T8 s: V8 [; O. c0 r6 w
; ^3 S% p$ \2 j" v) n8 Z: k! {- #define DEFAULT_PORT 5150
2 Z8 h" Y0 O! C D - #define DEFAULT_BUFFER 4096 \% b0 u0 M) p/ f
- " a5 i. C9 s* q* t2 H
- int iPort = DEFAULT_PORT;
. T+ C3 ^9 N# X. x - char szAddress[128];/ A: F! }1 d+ J$ r0 \$ Q# K0 |6 m
- & |5 k/ a4 [- x+ b6 O
- DWORD WINAPI ClientThread(LPVOID lpParam)* c: Z) C; |- O$ c" ~
- {
1 O+ o* c& V/ ?4 ^ - SOCKET sock=(SOCKET)lpParam;5 t; t' G Q) [6 _
- char szBuff[DEFAULT_BUFFER];) R) c2 O# Q& k; u4 ^
- int ret;2 a Y8 ], p7 _) ~* T+ h
- : K8 t6 {7 ?* G+ }" x5 z0 o" O
- while(1)6 N" U$ n) x5 I
- {2 F0 z; H) X6 d" Y
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
( d0 @5 Q% ~7 P - if (ret == 0)% Z7 e' W7 v' G1 n
- break;2 L2 x/ N" F m. V3 ]: M) K2 D
- else if (ret == SOCKET_ERROR)
) A3 ~& ?% F1 l" h6 Y+ p. _3 g - {7 Q5 r( Z( r# e& e9 n) O9 U9 [
- printf("recv() failed: %d\n", WSAGetLastError());! W7 ], e% m% ]. ]5 N, `
- break;8 @7 O4 `) v& r/ @8 }0 u
- }
! O- l/ ?3 ~1 q3 f+ a - szBuff[ret] = '\0';- R1 W% B/ p6 B7 ?+ r
- printf("RECV: '%s'\n", szBuff);
9 E/ z8 d3 T2 v2 q1 Y1 U; N3 L8 F - if(strcmp(szBuff,"abc")==0){
5 X" f0 h( p/ V- M - memcpy(szBuff,"Send the correct string!",25);) c1 j! J5 G# l% p) @ [( M% q3 N; y
- }
6 k( c$ V: g5 D( a' k i - else{" r' ]' U5 r# F# ?. H: w, ^9 {
- memcpy(szBuff,"Send the wrong string!",23);) z% m4 s* [9 _& a. \4 c; @
- }
) a" z+ O% J8 W% v) ~ - ret = send(sock, szBuff, strlen(szBuff), 0);* u, u4 L% ^) l: x1 h3 p$ k
- if (ret == SOCKET_ERROR){, _+ ~$ t8 Q6 o* i/ M
- printf("send() failed: %d\n", WSAGetLastError());
. ^4 K( c# D5 w* ?, j+ M4 b1 J- S, s - }9 m; J. z+ U% p$ ?
- }
* G7 d5 G5 i9 v# G+ W - return 0;
1 A- `& p# `, p5 y' |3 C7 A5 {4 ^ - }: F# `) E0 f* }- a" _* _
7 E" L$ t& L; R* E, t+ V" i- int main()* r! k* [ b$ A) `' d0 X, J
- {
# w" w* `5 b' D2 z - WSADATA wsd;) ~$ z: {4 M4 F5 H: |% k
- SOCKET sListen,4 G* x3 u$ J Z8 [% e* W
- sClient;1 u' ^) ]) f+ Z8 i$ H4 f5 X
- int iAddrSize;
2 Z. p4 e& z9 I' X9 p( ] - HANDLE hThread;
( T# u# O" F! i9 b2 g2 }1 I3 V. i, \ - DWORD dwThreadId;
; O3 x' Q9 g# G7 R: D - struct sockaddr_in local,
& l* G& g" ^9 A: V - client;
1 q1 W5 J9 x6 C m3 I% k+ c* E - 6 y# T- D# f% {
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0), T( L5 Z6 O8 D8 @( c
- {
3 E" E" E- \5 k8 A- W& F - printf("Failed to load Winsock!\n");6 v: G* [# r: c$ y1 G. a9 |
- return 1;
" r3 W- a- |9 b9 ^ - }% ^, R+ m6 D& l$ m- r% f
- // Create our listening socket2 h5 P% y1 T/ C
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
* M% ^! k4 ~3 T$ T. B9 s - if (sListen == SOCKET_ERROR)
$ d3 g4 n* t7 O: ]. a4 j K - {0 C6 l( S$ z' I: r0 W
- printf("socket() failed: %d\n", WSAGetLastError());# X' d& v7 A+ ^0 b) N0 i4 i; V/ \
- return 1;
# f5 o0 R! p) Y& p+ p. p7 ~( n - }
x# q h1 T' p; y& [ - local.sin_addr.s_addr = htonl(INADDR_ANY);
8 L0 n/ D+ f: q- B$ F/ r - local.sin_family = AF_INET;
2 ^1 e$ c* U- n - local.sin_port = htons(iPort);
( { @. t& U; {, p$ C - , j9 W' Y: [( n E$ d) ?- g" z, m8 G6 Z
- if (bind(sListen, (struct sockaddr *)&local,# g' P! W# Q+ p9 Q- n0 E Y$ S: B
- sizeof(local)) == SOCKET_ERROR)0 _- ^* Z3 L" f" X- H' Y
- {
% w) F5 u5 B% I0 x, G% x: o - printf("bind() failed: %d\n", WSAGetLastError());' B" @$ q) w3 c' P
- return 1;
( {0 R( m. J! {( ?" a1 q1 p" x - }" g9 U7 g. `: I6 b2 g5 A
- listen(sListen, 8);
5 _* R1 p4 }+ O3 \& W - // In a continous loop, wait for incoming clients. Once one
0 m6 n( @8 V- `8 |) o - // is detected, create a thread and pass the handle off to it.6 x( j3 I1 W/ B
- while (1)
" A* P5 O S. w# s3 J4 \ - {$ j" Z. p0 @7 p% D% G
- iAddrSize = sizeof(client);5 Y8 c J0 M, o
- sClient = accept(sListen, (struct sockaddr *)&client,/ k j# W% I0 V- I7 Q. g
- &iAddrSize); 2 g/ n- X* p0 n! U# P
- if (sClient == INVALID_SOCKET), ~% p$ D2 J+ i
- { 5 ~& u% U% I2 K5 Y. X- L) k: p7 p
- printf("accept() failed: %d\n", WSAGetLastError());. b% ~; B1 g1 c" S8 M0 H
- break;
8 T; ^' }) g) \5 V6 e - }
# X1 w2 G7 z3 g4 I+ s$ i, o - printf("Accepted client: %s:%d\n",- p x3 R6 E. k
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));6 h- H" K# K- H/ m+ X: f
- F5 r, D* ~6 M. W9 e9 h- hThread = CreateThread(NULL, 0, ClientThread,; R% [" a% ]+ _2 `' I, y4 W2 e
- (LPVOID)sClient, 0, &dwThreadId);
9 n# r& z2 f& m0 D7 w! S# y7 b - if (hThread == NULL) H9 t: W# r# t# Y2 M2 ?
- {
g" [) `+ t5 r - printf("CreateThread() failed: %d\n", GetLastError());
2 ~# q* u8 N- O4 j, u% _# t - break;
* ~8 I/ B) A7 R* n& j) x - } U' G% _; {" Z6 T6 O$ {
- CloseHandle(hThread);" X* L& Q A6 ] j8 Q; {3 Y9 _
- }: Q7 N+ \* b3 |6 W" y. |
- closesocket(sListen);
9 Z% E& n' s( `3 ?9 p -
6 Z _0 @9 c; g - WSACleanup();, Y/ n/ U1 W& }: l) p8 U. d; N
- return 0;
. K! k" s" E7 Q - }
复制代码 , h7 G/ e# h) M& |; E+ _. l
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& ^: J) \/ S. z. q+ I; s! Z$ p" J: Z) m4 U" j/ ^* m+ \- F9 B
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