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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。4 h# r7 Q7 x& A. y
客户端程序:client.cpp9 T. c* k( ]9 s& {, C
- #include <winsock2.h>
) R8 O" X5 e/ t* R - #include <stdio.h>. O! s% `1 j: a* @* |: w$ k
- #include <stdlib.h>
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- #define DEFAULT_PORT 51501 F5 C& Q5 j* o
- #define DEFAULT_BUFFER 2048
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' _ V) u! T/ Y3 A5 J8 J- char szServer[128],) A: k5 O7 K2 S# j, S
- szMessage[1024];
/ n! O4 P0 J; G5 D8 D& Z - int iPort = DEFAULT_PORT;- U5 D s) c: x6 F0 Q1 H
9 h- o5 k5 @6 p* y) h# c B! {- int main()
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- WSADATA wsd;
/ v) ~% O; V, \4 s9 _7 }4 X - SOCKET sClient;
; t/ u8 s! w1 y( a - char szBuffer[DEFAULT_BUFFER];' q! r% B) w5 z
- int ret;
2 |; }' h7 O6 D - struct sockaddr_in server;
% f. v) F7 @% Y( p B, k: A - struct hostent *host = NULL;% @/ m/ K. g5 k0 i; N8 k* ~
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)8 S3 b4 U# f# [2 X" u: v
- {/ L9 }" R+ f1 v
- printf("Failed to load Winsock library!\n");
$ S7 S! k' s$ T% l; M - return 1;/ {6 `8 z7 d- U. F
- }
$ D# M8 R! O5 P: E - printf("Enter a string to send to server:\n");& u% n: D1 M3 |, z( F
- gets(szMessage);
: [$ \/ }5 N* u h - // Create the socket, and attempt to connect to the server- z& V8 S, u5 T$ y( ]- y& G
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);+ \7 A- j; i# M# m, u r; U
- if (sClient == INVALID_SOCKET)
+ c1 O0 B- ^, t9 N - {
" o0 Q# i* {. G8 q7 I+ m' D - printf("socket() failed: %d\n", WSAGetLastError());
# G3 q/ X& ^5 E) @ Z - return 1;
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- server.sin_family = AF_INET;! s% ?! B8 {* u( E+ n0 |
- server.sin_port = htons(iPort);. i: Q/ r9 K3 M7 X+ v
- server.sin_addr.s_addr = inet_addr("127.0.0.1");% Y Z% G$ o% h, T# k
4 `$ p4 |+ y& M- if (connect(sClient, (struct sockaddr *)&server,
7 S! t8 b5 b/ R% W& r4 e8 I( r8 N - sizeof(server)) == SOCKET_ERROR)9 @; a/ ~4 D0 O0 }
- {
& x* Y0 f) N3 S! n$ G& _ - printf("connect() failed: %d\n", WSAGetLastError());
3 a: l3 g5 ?4 l2 @5 S6 J - return 1;2 ] h! V- I) Y
- }+ d( m8 ?" ]0 z2 {) ~
- // Send and receive data
. Q5 u8 V$ e4 e - ret = send(sClient, szMessage, strlen(szMessage), 0);+ U- w9 m: m7 h/ \! U
- if (ret == SOCKET_ERROR)
w2 H V( h$ [+ e - {. Z6 w c, i% I: @+ h4 D
- printf("send() failed: %d\n", WSAGetLastError());
% f) Q4 r$ C( M: m7 c# U - }8 l( ]$ w% B8 u5 r" r
- else{0 F3 m, }9 H6 C$ T0 ]9 Y& \
- printf("Send '%s' \n", szMessage);
2 X, z8 m1 Z9 D. w: W3 i( z - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);6 i/ ~3 F1 G# C% a
- if (ret == SOCKET_ERROR){7 |! @' E5 b) ~ x+ k0 U# B
- printf("recv() failed: %d\n", WSAGetLastError()); ~' e! z$ N4 |4 b/ I; C( [
- }3 t5 b$ r G/ c4 f1 V
- else{# \" v" H0 K3 f5 F5 ~/ j7 S
- szBuffer[ret] = '\0';+ R4 D+ o' z. ]/ n- J+ m; l
- printf("RECV: '%s'\n",szBuffer);
! a$ V. p" @- L- s2 Y e - }
4 r+ f% z. S4 O4 ]9 d - }
+ r4 u! u- z6 Y6 W4 F$ p2 q" P: z - closesocket(sClient);
# |/ Q& [+ W" z- `* d3 x7 A: H6 }
; J% f3 e. t+ Q. q- WSACleanup();' I% O& y1 P: W Z7 h( q a
- return 0;
6 {; E. G- ^: ~% c4 h% b) B - }
复制代码 服务器程序:server.cpp' n6 S$ M* X3 l! a: a$ y: @
- #include <winsock2.h>) G' [& L, y9 n+ H# |
- #include <stdio.h>- I6 H, X+ y7 W9 k: o& P8 ~
- #include <stdlib.h>) N# ~; ]7 b2 l6 X. ~: m
+ o' z$ X4 k3 F, M3 ~. Q7 S3 g: Q- #define DEFAULT_PORT 5150
, u9 m7 i3 o' g- _4 R - #define DEFAULT_BUFFER 4096
: D: n. E. S9 A/ M
" s8 {. |2 u$ V' z& y5 t6 q3 {" E$ o- int iPort = DEFAULT_PORT;: F! C; r* `$ |$ s& }3 q2 ]
- char szAddress[128];) y5 i& c: _. t- Y
- - d9 u6 ^0 M+ ^8 b0 Y
- DWORD WINAPI ClientThread(LPVOID lpParam)3 e5 N, j& A# @7 ^! P
- {+ s4 M& |/ m) U! W" d+ _5 Y; _" t
- SOCKET sock=(SOCKET)lpParam;
. j% r" b* a! z: Z0 Q - char szBuff[DEFAULT_BUFFER];
6 ~8 ?' `! H8 }/ o - int ret;1 ^7 _6 n7 R k. L( [5 Y
% e; W7 }% b: g- while(1)
# m3 v/ }4 _8 V( }$ a - {$ l8 P% F# a8 o, G: c6 w
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
7 t& u* ?" T: j6 C, D- v2 k - if (ret == 0)6 z- i8 \7 K9 }
- break;
! ^% w% y$ j$ o( a* S, E, i - else if (ret == SOCKET_ERROR)& v9 X9 {: W$ P8 i! W" }; F
- {
* z) o6 n \! q5 k+ c5 e - printf("recv() failed: %d\n", WSAGetLastError());
- S, N3 B4 O( i2 b, N, z - break;
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- szBuff[ret] = '\0';! n- [7 m8 s/ a9 e4 j' r6 g
- printf("RECV: '%s'\n", szBuff);# T# Z: H0 U1 Y j3 Q6 R' c! Z
- if(strcmp(szBuff,"abc")==0){4 `8 l1 L2 a& b% `7 f
- memcpy(szBuff,"Send the correct string!",25);
2 c& p. P* s/ k6 d1 @! o+ \2 A. V! \ - }
) j2 j: X! Z; V' u9 D - else{
8 E" y7 P$ E7 ] - memcpy(szBuff,"Send the wrong string!",23);/ g% r6 K7 H/ k0 y' V4 D6 k I
- } }( @$ s, G: d+ O g F
- ret = send(sock, szBuff, strlen(szBuff), 0);
, t- W2 o/ C; L; o, Q( J6 t7 o - if (ret == SOCKET_ERROR){( L) f" R2 y& l' M
- printf("send() failed: %d\n", WSAGetLastError());
% z0 x$ ^! ?1 x5 J |+ a - }
" n/ y' l d& W( P$ \; a; m8 k9 H - }
$ p% }2 S$ B' N- Y& T - return 0;
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- + S) y+ ?# e" i! I S4 Q
- int main()3 A6 m5 o& } Q* A
- {
}/ a5 u" ^0 r D" I - WSADATA wsd;. [, @4 h# T1 A9 v
- SOCKET sListen,9 x" Y: d) n- Z, V! {
- sClient;7 ]# z2 Q+ f: T4 W% T: D
- int iAddrSize;
0 v3 ~7 C, B+ Z* |. ^ - HANDLE hThread;5 Z+ o9 V4 ~3 i W% B( O
- DWORD dwThreadId;& e3 {6 ?% F7 v$ A
- struct sockaddr_in local,
* p# u" @. }6 R4 h - client;
2 K0 [4 z; j6 |2 ? X! o; k - / z l( O, l5 w9 h! |4 K
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
# L8 z7 g) M3 e) _' [( u - {: M C4 p( r; v& ^0 p8 }* y
- printf("Failed to load Winsock!\n");
8 A1 z; g/ A* `1 m& F5 ]8 L+ p' @/ x0 a - return 1;& b" t6 k5 S: z' L% `( e. d
- }
! M" H7 ^0 l5 X: l: T" y - // Create our listening socket
) k2 q, V! N5 P6 e - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);$ B! M3 \0 t/ H* Q& I
- if (sListen == SOCKET_ERROR)
" f+ {# K0 G9 Y0 C4 }- m, F. u - {' n3 _5 h5 f# C! E3 C/ y6 N
- printf("socket() failed: %d\n", WSAGetLastError());* c& F4 S) V* z" B+ G3 K
- return 1;
% m7 _4 R+ W5 C - }
( Q% C* B9 T/ s1 ~% R8 V( q - local.sin_addr.s_addr = htonl(INADDR_ANY);! o% i. {1 c0 C5 j. G V
- local.sin_family = AF_INET;' A2 `- p s n8 f+ a+ h
- local.sin_port = htons(iPort);
* W3 ? T, e) F0 b% O" j% r
' J" W- b0 C6 x5 M4 A- if (bind(sListen, (struct sockaddr *)&local,5 O* U& J. q7 H( z' x7 V
- sizeof(local)) == SOCKET_ERROR)
' H, U1 O$ N/ j0 ]' c9 m3 I* \7 _ - {& B9 |" E! A4 P$ i
- printf("bind() failed: %d\n", WSAGetLastError());
% {* L. s- Q# l2 R1 D - return 1;9 k1 g- ~4 }' Q% E2 ^
- }
; L0 z0 ?( s4 g! g! G9 L - listen(sListen, 8);( q( n% r8 G! c3 ?6 R
- // In a continous loop, wait for incoming clients. Once one$ }! y. \* Q/ A! @) j& a8 l6 V
- // is detected, create a thread and pass the handle off to it.) G7 D) p. b6 F( [
- while (1); r2 f( E; ~3 o6 G0 _" ?6 B% |" U. Q
- {
- ]0 h) `: h0 n3 b/ H/ b - iAddrSize = sizeof(client);
; a* d# n+ ^/ ~5 f - sClient = accept(sListen, (struct sockaddr *)&client,; N0 m0 a5 \6 r. F) G+ W) y) U
- &iAddrSize); - q1 K. u4 \3 C( E: |6 m
- if (sClient == INVALID_SOCKET)6 A% }2 m5 j0 o. M; L* V) |
- {
- w0 o: Z6 N7 y( n9 o4 z' w - printf("accept() failed: %d\n", WSAGetLastError());6 |: C6 l& Z$ z, ]% n
- break;
8 n7 q3 k4 d4 x8 `3 G& j0 W! D4 Y0 r - }1 q1 Y/ r w& X( T6 a
- printf("Accepted client: %s:%d\n",
6 q" k+ \5 ]9 C8 p) R Q- D6 a8 o - inet_ntoa(client.sin_addr), ntohs(client.sin_port));/ x6 q, Y! G g* @- V0 R, A# \
x9 \/ x. J: E- hThread = CreateThread(NULL, 0, ClientThread,
( d4 O0 t2 v0 m7 H `$ t - (LPVOID)sClient, 0, &dwThreadId);9 w# V5 {4 T" Q+ a3 |
- if (hThread == NULL)* y i# U7 p# m, |) ]
- {
' P8 v1 R4 q5 V I' ?, C - printf("CreateThread() failed: %d\n", GetLastError());: E8 @/ [1 i- e; P) N
- break;# z2 S' }9 i- [. f! d0 Q3 ^
- }% c5 p( ?5 M* g8 x3 ~1 B" f
- CloseHandle(hThread);" E* S% r4 g1 M0 ^
- }- N( n7 _" M& g9 h* J
- closesocket(sListen);! r W3 m5 y4 _ w; u( J4 |
- 5 _8 _( a1 X* y+ u
- WSACleanup();0 |, e" ^9 w2 |1 ^' h* H9 u5 P9 c
- return 0;3 z( F' ? F0 S* n% o
- }
复制代码 ; v7 m5 g1 n8 h# `( I. P, z
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