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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。& r! U7 V8 v3 c
客户端程序:client.cpp
1 \2 F7 z" b- s8 e- m0 G4 U- #include <winsock2.h>$ g( g" N& Q9 z! Z# [) U
- #include <stdio.h>
4 d$ E0 m p) L4 C' D' C. ~; ? - #include <stdlib.h>7 ?/ T% o7 \, j: R
) @6 o, B2 A2 S- #define DEFAULT_PORT 5150
2 i) O1 r3 D1 u3 I: N+ T - #define DEFAULT_BUFFER 2048' {3 m g- R8 b7 j2 v# i9 w
- ) H- L( ~; K$ a' |
- char szServer[128],
0 m( A& }0 G9 m/ J - szMessage[1024];% Q: F7 g8 L5 b" \
- int iPort = DEFAULT_PORT;
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; i* U) S8 b4 J& |% z9 E, H5 e: T- int main()
) z! a2 w; r; S" ` - {
1 I: a: W8 [7 W/ z- T! s - WSADATA wsd;
6 P2 r" P6 f( i* r9 p - SOCKET sClient;' x, j8 B/ E: d( O4 b( a
- char szBuffer[DEFAULT_BUFFER];4 C& c5 H' @' S- l3 x
- int ret;6 A9 }& Z8 }2 ?3 U1 E, s* J9 T
- struct sockaddr_in server;( I3 B/ @/ `2 C# ^; h: @
- struct hostent *host = NULL;" V3 w1 k5 l: e/ {$ l# p
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
5 r: T- Z; J- c U1 R - {" y; m; J7 ^7 t( Q
- printf("Failed to load Winsock library!\n");" W3 a7 W/ Q* k2 |
- return 1;. S3 ]: X4 r3 j+ R
- }- n9 W0 N4 E A
- printf("Enter a string to send to server:\n");
- G$ M5 d) Y: S, [" ^ - gets(szMessage);- ?3 B+ G1 C. z D
- // Create the socket, and attempt to connect to the server w6 U4 w% n! R7 ~
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
7 @# }( H9 t5 u; x - if (sClient == INVALID_SOCKET)" R# _- l% b+ k7 `& A
- {" l u/ q! b: b9 O% I* D
- printf("socket() failed: %d\n", WSAGetLastError());/ K+ |3 R6 I3 f$ z+ j# B
- return 1;
4 U6 x9 k! D, K9 J. m/ J2 p - }
: v, i% [7 H& u8 U! {2 J2 t - server.sin_family = AF_INET;7 A+ p9 D. V& [0 E
- server.sin_port = htons(iPort);
& `4 h V" f# F. h/ \ - server.sin_addr.s_addr = inet_addr("127.0.0.1");
" P0 X$ v' B% \% A0 j. O) n - , J. [6 @( S. S3 g: t
- if (connect(sClient, (struct sockaddr *)&server,
* a# Y. E& h! l6 l9 @0 g - sizeof(server)) == SOCKET_ERROR)
6 p8 c9 v$ N$ d% d2 z( H2 h - {
" H2 X% {' E. S$ }" I+ R' u) B - printf("connect() failed: %d\n", WSAGetLastError());1 V# R2 j2 q) p6 {
- return 1;
0 E/ ?, ]' A; h - }$ t) \, |6 ~# x1 V" {. ]
- // Send and receive data# w+ e( A4 ?$ ^7 q+ {9 w( E1 v7 h
- ret = send(sClient, szMessage, strlen(szMessage), 0); C" @" t z* |- i4 O4 Q$ u
- if (ret == SOCKET_ERROR)) n6 r, @; V9 q2 B
- {1 ^1 s4 u F$ R6 O* h9 G [$ t
- printf("send() failed: %d\n", WSAGetLastError());. T- o& p/ c; P1 @. w
- }# W' G1 }, Z! C- }
- else{9 s4 I6 Q6 F% \
- printf("Send '%s' \n", szMessage);
. c4 o5 U5 J6 j: T - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
8 ]9 W# t9 p @0 o6 Y3 f - if (ret == SOCKET_ERROR){
* X5 t2 n$ ?; n - printf("recv() failed: %d\n", WSAGetLastError());
% @. I9 a: ~ _; a9 C* z - }4 }/ c7 F9 {0 ?2 I& b) m- k: {
- else{
, {/ |5 ]& e7 r; M: G+ k - szBuffer[ret] = '\0';0 H& n; q) F9 q/ }1 S- N6 K9 n
- printf("RECV: '%s'\n",szBuffer);) P' C5 n/ ^7 b: U
- }5 s( \0 P5 @$ @# L6 x+ h
- }* S1 w& M" Z5 A3 R. L; C2 D& m# l6 Q
- closesocket(sClient);( K) @# x% [7 p4 b5 _
- J( Y# J. A: b6 A4 k: G' I- WSACleanup();
9 \/ ?" W6 G$ n& q5 q/ w - return 0;
; c. O" a3 d, x$ O1 @! U - }
复制代码 服务器程序:server.cpp( R8 m% d { r* N! ^3 p/ W
- #include <winsock2.h>
4 K, O* M* `9 y1 }0 q - #include <stdio.h>
6 n, g# U1 e3 f) P - #include <stdlib.h>
" H, r A& l4 G
* n8 ^( I0 D! y- #define DEFAULT_PORT 5150" {) V$ e" c/ s" g
- #define DEFAULT_BUFFER 4096
3 ^( I% Q( W" q - ) O! j7 O% g1 X" Q# x
- int iPort = DEFAULT_PORT;
3 M# n" [1 y y: c! `: m& } - char szAddress[128];7 G$ ~" t- q& p2 \6 e% K" w
- - {7 e7 x9 q6 ~. Q, H
- DWORD WINAPI ClientThread(LPVOID lpParam)+ }+ C; R$ [0 w( L1 a
- {7 c# a# m2 n9 L6 H: m! x$ l
- SOCKET sock=(SOCKET)lpParam;. M, j% d4 g% a1 N
- char szBuff[DEFAULT_BUFFER];% @3 Z( l- ~% h: X% q. p* G) a
- int ret;4 g/ R0 t4 X/ T, a9 J2 N x5 w R
! o! F; Y' O1 f- while(1)
: E" w. R2 r( I) V' L - {
5 a! q4 }8 _! C) W! i7 u, y - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
d# n* i; E5 a T8 |' t - if (ret == 0)+ F; J) V+ s( Y
- break;
6 S+ P4 e- E @ - else if (ret == SOCKET_ERROR)
8 a; r% W- B# ?) ?; k - {# F0 h+ }; A: a* \3 J. O
- printf("recv() failed: %d\n", WSAGetLastError());/ [ q2 N$ R) T' I& L- g1 E) U3 f# p- J
- break;
& J1 _0 ^2 D& e9 r/ P - }
1 i2 I3 m. e9 @" y) J - szBuff[ret] = '\0';
- F+ n: t3 f6 n" _2 b- @ - printf("RECV: '%s'\n", szBuff);
+ L& z& H7 {$ a5 F9 _8 A - if(strcmp(szBuff,"abc")==0){
6 r! y4 I7 {. ^4 d( L - memcpy(szBuff,"Send the correct string!",25);( v5 |) P& I/ E; X/ J
- }9 A& d6 N) J* @* B/ y- y3 ^5 H
- else{6 |( I; F. f3 q% \
- memcpy(szBuff,"Send the wrong string!",23);2 B D4 G2 }& v8 G* ^/ | {8 Q" u
- }2 n2 o0 S3 m# J+ X/ i; y, W
- ret = send(sock, szBuff, strlen(szBuff), 0);
) Q- p% Q& B/ d - if (ret == SOCKET_ERROR){7 v0 k3 x0 W+ c3 A5 ?# w3 F
- printf("send() failed: %d\n", WSAGetLastError());( e! r1 M! k$ [ @4 B" K
- }0 y# O% M# x& l2 f/ x
- }
' l W/ X# A& Q$ P( j* v - return 0;! x+ m6 N! n2 l* j& w
- }- R+ Z/ u/ w5 f+ r
- - D/ v) n0 @6 ]5 }
- int main()
* K$ q3 @1 n- W. I! e9 {( t, w+ c - {4 p" C B8 ?6 n0 K% ~, u& h9 B
- WSADATA wsd;
# N8 h% C6 A1 ~+ } - SOCKET sListen,
# w' Y# S, f5 r - sClient;
h/ v9 J9 G# `: d7 P- Q. e6 i; X - int iAddrSize;
. v" Q" ]) v# x5 [" s) j. [1 g - HANDLE hThread;3 n. z" l! }$ {, Z% J, T
- DWORD dwThreadId;8 r4 r5 I* N4 ~
- struct sockaddr_in local,
4 {; i ^: h, W* ^ - client;0 ]5 R. y$ q( G% T
3 @3 |( ^& e. Y0 G1 V& W( p- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
* \( H$ i4 y: u- y0 { - {
& L: |4 [! C% c ^+ ?0 J - printf("Failed to load Winsock!\n");0 e) g; i& P* f
- return 1;
* |% e y8 Y' i! I9 A4 N# H4 d1 q - }
* @+ B' N9 B$ P1 R0 K - // Create our listening socket9 _* F8 S- V. ` `' d6 v% C
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
! d) G) Y" v x9 Y& l) ~) t# O7 x - if (sListen == SOCKET_ERROR)
- d) s5 L& t% s) I2 K - {( L) ?! A7 P" O( E2 {0 ]2 l) j- Y
- printf("socket() failed: %d\n", WSAGetLastError());
0 m8 A* u6 Y8 A, t( B4 [ - return 1;( b( X% _2 y: s+ Q9 o$ F
- }
/ _ ~8 e/ U2 q5 g3 O, m% l6 P - local.sin_addr.s_addr = htonl(INADDR_ANY);
7 q5 i; f* m8 V0 ? - local.sin_family = AF_INET;
# f2 r$ i) U5 k; H - local.sin_port = htons(iPort);3 K5 e, ?. g8 n3 ^
- % Z& k) l% f/ f7 i" }
- if (bind(sListen, (struct sockaddr *)&local,
5 y9 k' Z& r( ^) G1 V - sizeof(local)) == SOCKET_ERROR)
* Z. G* Q4 u8 e' A4 _: X - {! Z( w: a$ d0 m$ x" P! P
- printf("bind() failed: %d\n", WSAGetLastError());
I6 T- Q; I% q - return 1;9 H9 F& [* C: c& e& u6 |
- }
* _1 }% r+ q% n/ C! T - listen(sListen, 8);5 K! w0 n$ i$ ]7 s
- // In a continous loop, wait for incoming clients. Once one% Y9 Z$ e4 J" o, D
- // is detected, create a thread and pass the handle off to it. A% z$ W" u, H/ c0 L/ s- l/ c9 W8 R, l
- while (1) y5 k1 i9 l$ V, ^. R
- {
1 p: V& K$ [; l5 P - iAddrSize = sizeof(client);
S1 k$ w8 ~+ J2 E5 g( H - sClient = accept(sListen, (struct sockaddr *)&client,
8 P: q0 o' }- v" R* S! D ^ - &iAddrSize); 9 P" @$ j3 q6 X; Z% g( U/ k# F3 Q! [
- if (sClient == INVALID_SOCKET)& f/ k' b% r0 i
- { ; o; G3 | n2 l9 I* ~4 N
- printf("accept() failed: %d\n", WSAGetLastError());, k7 x% F. M! ~$ K, v
- break;" x4 O( }4 b" M
- }
# S7 S: [5 Z3 J; G5 D$ `- s - printf("Accepted client: %s:%d\n",$ ~) W9 j1 e$ i3 ^" Q& l& y
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));, |3 I& p; p; }4 W1 q, g* @0 X+ F
8 u+ g. x |9 F, ]- hThread = CreateThread(NULL, 0, ClientThread,' l+ P. R, B9 }+ |
- (LPVOID)sClient, 0, &dwThreadId);
4 Y- ~, F# M$ r1 J& d8 ~$ _" A& u3 \ - if (hThread == NULL)
& f& I. j$ h3 U% L& N - {$ t% s- Q! N9 u8 W
- printf("CreateThread() failed: %d\n", GetLastError());
5 O8 r5 e+ I& ?$ g/ e - break;4 L+ S+ [- _$ F5 o- t$ z% G" T
- }
; I1 q) {: g( G+ r' f/ T - CloseHandle(hThread);# z' S% l3 @6 _+ v1 k
- }
* W- k6 `9 Z" O - closesocket(sListen);% u( j. A- j# Z9 c" [
- 3 m' T- C. G% U9 T# i2 b
- WSACleanup();
: n( \' y: N, O: O" y7 \4 ` - return 0;
' Q$ e+ _7 g0 A! j - }
复制代码
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