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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。# n. G& J* O9 d2 ~+ E& y% \% m7 n8 n
客户端程序:client.cpp& |! N. X2 G) S' W( g
- #include <winsock2.h> h: b0 W- N, d9 Q5 C, S5 X
- #include <stdio.h>
# I4 y' ?8 x. ~ - #include <stdlib.h>
# @0 b) T1 J0 P! k - ! w% {+ u; a L2 k, `+ z9 L% I
- #define DEFAULT_PORT 5150
) y; z4 f3 z( u U - #define DEFAULT_BUFFER 2048
, ]4 H$ o, H5 p- H' x* x. r - 8 w" }6 ~! c3 K: R
- char szServer[128],
8 E, T0 k4 O, e" T - szMessage[1024];# _* Y% g- l3 ]5 }& @
- int iPort = DEFAULT_PORT;7 i/ ]+ P# T4 l/ `9 @
r$ k7 Y& [- F8 i0 W6 W- int main(); T9 W* B+ I3 n, Y4 i
- {
s9 q$ a/ H0 A5 k3 P! ] - WSADATA wsd;
: V! d$ w5 i, S- V9 ?6 V+ g" {' h - SOCKET sClient;) b m6 b3 a+ \
- char szBuffer[DEFAULT_BUFFER];
) R; g c+ k1 Q - int ret;
- y( B& T, c% o* W8 z! z$ Z - struct sockaddr_in server;& S0 e" h% M- ]0 q9 P
- struct hostent *host = NULL;% A2 Y0 q8 _9 F
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
- ^7 y" a. n1 x) { - {6 }* O- o0 {) u" q* z5 s& C
- printf("Failed to load Winsock library!\n");3 @. J: d& m& D' Y0 h) |
- return 1;
/ m( }, q2 a. Z% D: }: o - }! J& N. I' P# ?- b \8 w
- printf("Enter a string to send to server:\n"); \+ M; i) n9 w4 }1 t8 \
- gets(szMessage); b9 P; F0 O# J
- // Create the socket, and attempt to connect to the server
% c3 S" H, n1 @! f4 j0 \2 M - sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);" z0 h( a) Z5 O4 i; U0 Z
- if (sClient == INVALID_SOCKET)% b2 w) F3 p6 f# s4 E
- {5 U, J6 U. a2 @4 L
- printf("socket() failed: %d\n", WSAGetLastError());% ^, _; W5 R M& \2 f' _; h
- return 1; d; Q& R8 |* C& i
- }9 `2 [" t8 E! ^* w- F2 c
- server.sin_family = AF_INET;
! u/ _' |. n5 U2 ?6 z7 q' f - server.sin_port = htons(iPort);
7 u0 ?5 Z% D$ z. q: } - server.sin_addr.s_addr = inet_addr("127.0.0.1");
( G" {" v; @% h. }+ z
; `; v! c8 A' v* p2 X- if (connect(sClient, (struct sockaddr *)&server,+ L1 B. ]& |3 m2 j' \* _ N
- sizeof(server)) == SOCKET_ERROR)
+ \, Q9 o. a8 b$ Q - {; e, l p# {0 E( H2 X
- printf("connect() failed: %d\n", WSAGetLastError());
6 R4 G/ j; ? @4 r8 { - return 1;
/ o! f7 j, m1 E6 F5 D( F - }
' z0 o J# |0 B2 |+ r - // Send and receive data
' ~: E$ l Y) S+ c8 }: }$ E - ret = send(sClient, szMessage, strlen(szMessage), 0);
% \$ [6 L; a! Y; g" P8 h - if (ret == SOCKET_ERROR)4 V) g9 A9 A& D9 L5 k1 S- u- E
- {( `; m- z' i7 K$ `6 g: m# h3 [
- printf("send() failed: %d\n", WSAGetLastError());
/ D9 b' ?8 v5 T* ^' K Y - }
6 h: R4 L9 ?* h( r8 G7 @1 F1 E - else{2 @5 D5 i& i7 O; `& D1 }
- printf("Send '%s' \n", szMessage);- ]% Q- d3 S) Q0 @/ Z- J; l H
- ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
! Y( l1 ] ^: }' } - if (ret == SOCKET_ERROR){1 g. D4 V# }2 i0 k' e) ]! j! w; n
- printf("recv() failed: %d\n", WSAGetLastError());
, j# n; w, } O/ p. v8 X" T - }
, A6 _* Q; U% ~, v. O - else{
- J N! V1 a& j4 B - szBuffer[ret] = '\0';( _0 z+ m* |9 ~* ~
- printf("RECV: '%s'\n",szBuffer);
. P* i0 y9 _) B. M - }
6 v& @% c/ V# `. v2 s - }( ?4 \# v5 J. Y( G: E0 ~; Q
- closesocket(sClient);' _4 P! E( t9 o
- }6 [4 F H. w- W/ {
- WSACleanup();
: D8 S4 g0 }/ K& y$ s - return 0;3 y9 s5 d3 e5 f' x; l" ]: |
- }
复制代码 服务器程序:server.cpp
; V/ k5 f) X( S/ f3 j- #include <winsock2.h>
" E- C! N% w# u2 T- u/ B: ] - #include <stdio.h> p: X V) P: R
- #include <stdlib.h># b1 {/ V* F1 k
- $ Y: ] h/ L: M
- #define DEFAULT_PORT 5150; P" a- A* R! H8 i
- #define DEFAULT_BUFFER 40962 W& Z! }2 k/ L) }) ]' Y6 S7 \
- 6 \1 y7 N( l/ x v/ [: M
- int iPort = DEFAULT_PORT;
; b4 X$ Q* v. e1 M$ D7 P% S6 B - char szAddress[128];
7 z: P( _* p' N
( ?# n! K& P! \0 v- DWORD WINAPI ClientThread(LPVOID lpParam)1 \; W: I. f! h/ c
- {7 A! v9 f+ p; b* p& ]4 H
- SOCKET sock=(SOCKET)lpParam;* [3 K: `7 w7 M V1 \4 W3 o
- char szBuff[DEFAULT_BUFFER];
' x7 e, T M# | - int ret;
5 }, R; k) l% T3 g) l
- I, t; y% `& m) E- while(1)
: v. {4 z. o$ e - {
; i+ F- S) z: D) T% z$ i% e* R - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0); F' L4 I! o2 X' P1 g
- if (ret == 0)
7 z3 u7 v! I) I4 P& V - break;
7 c" H5 b; U) H# D6 } - else if (ret == SOCKET_ERROR)0 d! ?) W9 V0 S- Z% W
- {; q' w) @2 @( Z' p
- printf("recv() failed: %d\n", WSAGetLastError());( u- s8 o; J8 q4 k. l4 |
- break;
# S1 X+ V& y" ^4 ?4 @; S1 p - }$ q; B' b: N! B' ^# H3 E. M
- szBuff[ret] = '\0';8 q' X* |: o: N, I4 I, C) y& E. ^
- printf("RECV: '%s'\n", szBuff);, ]$ ~9 t v" l& ]; f/ ]6 ^ p2 `
- if(strcmp(szBuff,"abc")==0){0 _; t X9 K) r% J+ z
- memcpy(szBuff,"Send the correct string!",25);4 F) X7 \ S# x
- }+ K" b6 C) d6 l* ?! F; {5 d
- else{
9 R a; [0 V( W) Z7 o - memcpy(szBuff,"Send the wrong string!",23);
" G4 s! c1 V- a0 j2 n g+ T - }/ G7 d4 J( z$ X( i% ^! y* ]
- ret = send(sock, szBuff, strlen(szBuff), 0);
5 s9 S$ X Z/ g6 y - if (ret == SOCKET_ERROR){
$ P+ g! p" u1 X' d2 P/ [ - printf("send() failed: %d\n", WSAGetLastError());
1 Y6 q2 Y& _/ ?! \ - }
) ]% u- I8 e( u0 Q, g# u% J" R - }: v! o4 Z! E+ |4 g( ~/ s2 n1 z) B
- return 0;) ]( B M. @% A% I% e) E* g" x
- }
$ T+ e P: R: P) s# @ - 5 F& f* k$ v* z* F
- int main(). A% w9 ] A$ B, P8 h! N
- {
$ a6 Q& s/ ^) C; ~" P - WSADATA wsd;' d+ W# Z4 V7 m' L' O. b5 n# P
- SOCKET sListen,! h; C: G& o& Q9 h
- sClient;
$ _( ^% T. m) |3 K- x - int iAddrSize;
& h8 `; n2 {0 i, |- [ - HANDLE hThread;3 ^8 m8 M6 `* Q1 B! |
- DWORD dwThreadId;
% i1 ]. ?. O$ v - struct sockaddr_in local,' e5 L6 C- ` `9 [( I
- client;
+ k1 j9 E A L( L1 d" m3 {$ j2 } - . V* r/ Z5 R. T* A
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
( v- W- j. @# o6 ~0 @1 S - {, y$ E/ p$ }9 v, m
- printf("Failed to load Winsock!\n");2 f& g, E/ a2 y2 t7 ^* F
- return 1;
3 D$ Z+ x4 i0 G$ X( U& `8 Y - }
1 x8 k* y# f# z1 x( |0 H1 _. l, y - // Create our listening socket8 |5 D6 H2 ?: G# l( g
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
5 k* I% X$ ?+ s X# m5 B9 W - if (sListen == SOCKET_ERROR)
6 E2 A4 Y" V2 b- V" P; F7 A - {. q, j& u( r0 w+ l! [
- printf("socket() failed: %d\n", WSAGetLastError());
6 |2 f9 X6 W1 C+ P" R) @$ | - return 1;, L# {# C+ Q- v9 v# T
- }
8 m4 S4 N1 j- R# G# M# U - local.sin_addr.s_addr = htonl(INADDR_ANY);( }! A* R) X' a
- local.sin_family = AF_INET;3 [& _; J9 T" T# F/ h/ D$ n
- local.sin_port = htons(iPort);2 w8 F" r2 p- g7 _% Z; {2 s3 X
- ( z5 \6 v' X) J, K
- if (bind(sListen, (struct sockaddr *)&local,# [" I3 s4 q6 }5 w/ G3 O
- sizeof(local)) == SOCKET_ERROR)* s4 {% H% I: \7 ~( K! O
- {
1 z* T% s7 T( L( ] - printf("bind() failed: %d\n", WSAGetLastError());
1 a% e$ L( v' m+ S - return 1;
4 I. G' N# N: t- v/ f2 N - }# W- }% j/ U* X8 s' p& c! W
- listen(sListen, 8);/ s4 L' ^* l) M, W0 {1 |) v2 x
- // In a continous loop, wait for incoming clients. Once one
0 [5 F0 x: V6 j$ |: d: j - // is detected, create a thread and pass the handle off to it.. z1 i; @1 d% @
- while (1)
0 R( I4 n! S; S/ X/ H z - {6 n8 Q" I5 K5 {; p: W$ }6 I
- iAddrSize = sizeof(client);
9 n' A) H5 l# B - sClient = accept(sListen, (struct sockaddr *)&client,: O3 b' w( ?4 v6 z, z/ U$ d5 G
- &iAddrSize); - [- w0 @" K- |3 S
- if (sClient == INVALID_SOCKET): q) r1 C- V1 m+ A8 c, _
- { ! e4 [2 ]/ J% Y; `% _
- printf("accept() failed: %d\n", WSAGetLastError());
, w- W. V1 v. l - break;
+ Z+ k# c" g% D4 ] - }- W5 _2 `( |/ }- B; ?
- printf("Accepted client: %s:%d\n",
F. \. q+ k8 ^+ o5 N - inet_ntoa(client.sin_addr), ntohs(client.sin_port));) U: j' m( ?7 s) K* Y" a1 b
2 M9 z* L# \1 [: ]! R: F* j& ^- hThread = CreateThread(NULL, 0, ClientThread,4 }4 g0 ?4 x2 U% n! o9 V: n
- (LPVOID)sClient, 0, &dwThreadId);2 V8 @! V ?4 q* A4 j. U
- if (hThread == NULL)9 Z* \' w5 `5 I+ b0 E J/ ~% E
- {( F% [3 L; `3 g# r
- printf("CreateThread() failed: %d\n", GetLastError());
3 L2 [; C* X( C/ v+ ?; q& n - break;' I* Y/ d W; _+ m* c8 C8 z
- }
+ h9 ? r9 ]$ [ O0 K6 R5 V* ^8 Y - CloseHandle(hThread);
4 `8 u- @& ]" X1 b" m - }
$ ^ p( I" S5 e; k - closesocket(sListen);6 n7 y5 l' S+ @
-
( B; f# ^9 P$ ]. j- x- f - WSACleanup();
: M- _7 r" ]0 X1 d; [- I - return 0;5 Y! _2 L3 n' O1 v' V) x
- }
复制代码 " @+ W; m2 o4 `( y9 r, ~
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