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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。9 _% {/ S! t1 Q q: p
客户端程序:client.cpp
8 y1 z2 ~' n8 }7 D. p- #include <winsock2.h>
4 H! X. F w7 q" [% @! Q) J - #include <stdio.h>+ j" n V2 o0 @% d4 t
- #include <stdlib.h>
1 M9 ]8 a) G1 a% K( K* u - ( h5 ~" T4 U3 ]* |+ V% y
- #define DEFAULT_PORT 5150
4 G; j3 j( \! e8 t& k - #define DEFAULT_BUFFER 20488 n$ l& `4 u4 G
- 0 r; a, v1 i: w9 f7 E0 F9 Q
- char szServer[128],
5 ?( e. e+ ]) K! o) B - szMessage[1024];) N6 p- b: C9 Q6 R3 [1 k0 t
- int iPort = DEFAULT_PORT; {# d& |$ m4 Q4 d; _" G; F6 J/ C
- : l% @. d* w4 \$ N0 `
- int main()1 w. M2 K4 ^$ |
- {
, A8 {* h$ u: e" ~5 x& s. ?7 _6 B - WSADATA wsd;
3 ^: M: v# u) T: P$ z - SOCKET sClient;4 F& E* [- d% j( Y7 R
- char szBuffer[DEFAULT_BUFFER]; r" }) H8 z+ K) H+ c) s3 I' |; C
- int ret;* y+ j" o" Y/ W Q. p( K
- struct sockaddr_in server;
, `9 i: ^9 F | - struct hostent *host = NULL;
' U/ h- z8 j8 G1 s& b - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
7 _2 L. h- z# Y, {9 X+ Z$ A# U5 ~, o - {
! Q: K M- M% l8 D5 a - printf("Failed to load Winsock library!\n");
2 `! `) s: e/ B* X6 C' ?; O - return 1;- @0 P& ?# X, r8 U$ s
- }5 G% [! p- A; X9 d
- printf("Enter a string to send to server:\n");
& W1 ^/ P. f, i$ w1 X' x - gets(szMessage);
7 A5 W7 i/ D% i. A - // Create the socket, and attempt to connect to the server
8 l* ~. m7 j6 O! Z+ G - sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
, [! B5 @9 \' T9 T9 m - if (sClient == INVALID_SOCKET)8 Z- p/ t2 x. w; u
- {8 P' H( ?; I1 t' {8 P
- printf("socket() failed: %d\n", WSAGetLastError());/ w$ E1 C% v+ J2 K, C
- return 1;" g% j1 ^+ y; f, u$ y
- }* q* L, i! e0 |2 j3 d& J
- server.sin_family = AF_INET;
' H8 c! l8 u. J. ?; R' m* c' `# j; y - server.sin_port = htons(iPort);' U/ p% a/ J" v+ {+ `
- server.sin_addr.s_addr = inet_addr("127.0.0.1");) t; `, p( \' e4 p( v# F
: l! T2 u' P1 R4 d5 H- if (connect(sClient, (struct sockaddr *)&server,
1 z' J: _4 D) M6 G+ q! }% A - sizeof(server)) == SOCKET_ERROR)
- d3 N+ U' z) r" V/ s W+ S - {
! G7 |+ Q z2 M+ N - printf("connect() failed: %d\n", WSAGetLastError());
& \/ ~# ?1 q% A/ U - return 1;8 M& z- X; q, R6 N2 p' p( p
- }
& s2 J; _7 { c6 k6 T6 |- e1 J - // Send and receive data$ \, z9 E. M/ H( N0 `
- ret = send(sClient, szMessage, strlen(szMessage), 0);/ y" x9 d* e' m/ e
- if (ret == SOCKET_ERROR)" B" n7 V& E! S; Z" `* e
- {8 D$ V- j* @, A: X( j
- printf("send() failed: %d\n", WSAGetLastError());, p# c' z: T0 {: i0 b
- }
+ r* y' }+ f. I - else{
2 G+ s3 F: i% o/ s9 r7 n - printf("Send '%s' \n", szMessage);1 \ L0 i0 b: l- L+ y$ \; F
- ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
+ L5 X$ W# z. j' L" k: b - if (ret == SOCKET_ERROR){( _, {. \+ o j; U9 ]
- printf("recv() failed: %d\n", WSAGetLastError());, H! V. g6 ]% Z# Q" y% X$ b3 P
- }
+ `9 [4 d; ^( x7 @1 O! R - else{
. B" K6 D: H+ b( z+ A+ |9 U Q - szBuffer[ret] = '\0';
2 g4 y8 c' D+ F) U7 B$ Z - printf("RECV: '%s'\n",szBuffer);3 k9 P- Y# {1 a1 v! u0 N. F
- }
4 V# H& @0 z) }" A% e - }
4 B* s6 c8 j3 e0 C% p- g - closesocket(sClient);7 _2 z! Z8 O: I8 Q
+ \6 P* ?; o1 U- WSACleanup();4 W* Q6 E9 i9 u% n) p
- return 0;
; X( z3 i5 u' f r - }
复制代码 服务器程序:server.cpp. @( F2 |; K$ n5 F5 _
- #include <winsock2.h>4 Q# m& Y. y2 f8 U( N) f' i
- #include <stdio.h>
" y' n: Z, s4 Y r+ b( I* @ - #include <stdlib.h>4 k y3 e' A; m$ @
- ; B' e$ k/ W* ~( ]3 N* @/ u! n, ^" |
- #define DEFAULT_PORT 51502 U& }% a* n: S1 C0 e% N, h d
- #define DEFAULT_BUFFER 4096
2 v, P0 C$ d; Q% Y3 e" a; z, m
" q& K8 g) V" ~( \- int iPort = DEFAULT_PORT;
& C; O9 v+ C5 o$ Y- }( } - char szAddress[128];& O3 [# _( z$ |; {$ ~9 B
- ' L$ f/ Q: C4 b3 B$ M; y
- DWORD WINAPI ClientThread(LPVOID lpParam)
; P2 b0 J5 \( T& A - {
6 l- ~2 W1 }1 g5 S0 L% c) \ - SOCKET sock=(SOCKET)lpParam;* s5 t) h0 Q2 d$ T6 z' \
- char szBuff[DEFAULT_BUFFER];, Y7 n+ P% C2 V6 O$ ^
- int ret;
# V( l- S- D$ N
& @# K. r) t4 `8 P- while(1)1 V, b4 ]9 J8 R# z$ e
- {
- u$ i# h# ] j6 V( V! O( T - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
% h" z" u! X2 G/ ] - if (ret == 0)* c& j* t( J: q. m, ]
- break;
. r H$ N7 q$ D; z; }. K5 r0 T# s9 t - else if (ret == SOCKET_ERROR)4 m7 X, d( J) u, B: @" h
- {0 s* A3 B9 {& h' w/ ^" _, {
- printf("recv() failed: %d\n", WSAGetLastError());( I" x( \5 P: t: {8 L8 T% t
- break;! ]% M4 T( Q4 l6 l ~3 S4 I
- }2 i% Z9 [. |8 L6 E
- szBuff[ret] = '\0';" l$ b6 C9 R' ~5 O
- printf("RECV: '%s'\n", szBuff);
8 \. C1 \8 ^7 e& P7 i/ F- A - if(strcmp(szBuff,"abc")==0){# ~6 s2 S' x* A- I
- memcpy(szBuff,"Send the correct string!",25);, d6 d* M9 E5 {8 R* b& }
- }
- C \+ ?+ c3 q* s8 B1 j1 g - else{
! I2 P8 ~, o6 B: N6 L8 U- C - memcpy(szBuff,"Send the wrong string!",23);* Z/ c# \* \7 C2 u
- }
: \9 s$ h# b1 f1 e* h9 w& A( ~ - ret = send(sock, szBuff, strlen(szBuff), 0);5 j- q0 u. E$ a# j" Y1 c- p1 G
- if (ret == SOCKET_ERROR){( b% K3 U$ r! i1 ?
- printf("send() failed: %d\n", WSAGetLastError());3 M9 L/ _5 `# a' y, R
- }
8 K% s! @- y. X5 Y# l - }- h+ @+ A3 L6 G( V! Z
- return 0;- m; j) x- z) ` I$ S" O* {. h
- }
9 X8 t0 u' K1 b - # H( r( z8 T: t ^5 o5 F3 }
- int main()
3 M V# P1 d) T M/ B; _, V3 [# i - {
) R: ]# x% R+ ~1 K# b% s - WSADATA wsd;
( a& Q/ {3 s: D' x# c% i - SOCKET sListen,
% x% m) m/ k- q2 g$ @3 J - sClient;
# y! p8 e" X% z/ a - int iAddrSize;
7 F9 ~ a# f9 | - HANDLE hThread;, \$ \6 j% K/ l% Y1 @5 ~! o$ |
- DWORD dwThreadId;! C. ?8 w2 T8 a! Z
- struct sockaddr_in local,
9 b) w9 ^: m% Y* \( U" A - client;
5 {9 P# F' s* j6 c) d' n6 Z- r
- J( i2 q0 |6 v- U7 ]- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
* P; @- M) f' W. z/ B& s: i; C - {& Y% M! ^4 \! K5 Q; j h4 }8 ~
- printf("Failed to load Winsock!\n");8 w1 X' S1 m4 t' \& L- f' A
- return 1;6 C0 y- K$ u# \ A* n3 b
- }# \4 n2 e, B' R
- // Create our listening socket0 J" ~ B4 d; U: X6 }+ }% W ]
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);4 s. x$ q# N) k9 ?7 E6 D! ^
- if (sListen == SOCKET_ERROR)
# ?- R/ v% m7 _2 H1 Z - {# g# x5 Y0 B& Q: v; x
- printf("socket() failed: %d\n", WSAGetLastError());
r& a G. f' O2 I K - return 1;+ E7 k; ] T5 s& j) e8 P# W
- }
$ }! n0 X. q5 Q# J( s( ]7 x: p% C, C - local.sin_addr.s_addr = htonl(INADDR_ANY);
& }" m; I* h8 t; h5 A5 k- A p - local.sin_family = AF_INET;: O5 B! K& M) p
- local.sin_port = htons(iPort);
, n; N4 n }2 Z+ U* p. L/ [
9 ?& A- R/ B6 ?$ v% `" u- if (bind(sListen, (struct sockaddr *)&local,1 K8 j$ _+ E2 |; ]" M
- sizeof(local)) == SOCKET_ERROR)( y7 _7 A7 m: c2 b2 w
- {
9 c4 ]" R& I. |; a0 ]. T- @1 P/ j - printf("bind() failed: %d\n", WSAGetLastError());# V1 }8 Y) p3 V. }* I/ z Z8 b
- return 1;' B) K+ U) D, H1 r8 i
- }
2 z/ \% N; Z$ V8 J6 X6 Q - listen(sListen, 8);: _. P1 J4 p: C4 u! R. E; F; N5 C
- // In a continous loop, wait for incoming clients. Once one( A+ w1 m4 }5 C* g7 ]6 Z5 U( T3 k7 M' s
- // is detected, create a thread and pass the handle off to it.$ m9 `, b. m" G! T: M( G. u
- while (1)
# _" Q) e) u8 G3 v* \$ i - {0 ]* Q; F7 \+ j
- iAddrSize = sizeof(client);
4 i, ]& G4 k5 O( {3 O3 e5 D4 j - sClient = accept(sListen, (struct sockaddr *)&client,( A v5 a! F( Q
- &iAddrSize); ! o V- w6 z0 [1 P8 U* ` ~7 E
- if (sClient == INVALID_SOCKET)
( [ z) f/ N# y- u7 s2 q - {
, S+ w& l9 V* V, F - printf("accept() failed: %d\n", WSAGetLastError());
/ A X! U" `7 f - break;
" |: k/ ~& A2 t& w8 X* _ - }/ `4 c6 r: N1 b1 Z
- printf("Accepted client: %s:%d\n",
2 i5 A) v6 [3 {3 R1 I: L - inet_ntoa(client.sin_addr), ntohs(client.sin_port));
5 u" a3 u; |" M9 ^* z H* y: |
% \/ D) H& \. t: ]' s+ n- hThread = CreateThread(NULL, 0, ClientThread,
) x& T$ v- F2 _* s' g- |7 _ - (LPVOID)sClient, 0, &dwThreadId);# U7 L* Z( |" c& @
- if (hThread == NULL)
4 o( @1 r a: s, N1 c. ~ - {
# B2 Y! z: V0 i1 G - printf("CreateThread() failed: %d\n", GetLastError());
) j: V- B D3 |3 _) r2 C. _ - break;* C) L! v& j4 i# ~) p) T0 `
- }# t/ p" D9 B3 _- |! b) F" X: Z
- CloseHandle(hThread);
9 f" r! y' D2 q0 X - }3 q/ G, q" b: a2 a
- closesocket(sListen);
% p# q: s, i W -
0 U6 Y8 O! A/ [% q) E3 d5 }3 Q9 ^ - WSACleanup();* W# m4 ?& n# ~+ V. B$ S2 Y3 L
- return 0;
- G2 V" P T7 s) F: m - }
复制代码
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