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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。+ Y9 ]: S0 [7 E5 D6 v& S% w8 v
客户端程序:client.cpp% H$ z, J6 K" D. d
- #include <winsock2.h>: Y* q6 e) B0 ?
- #include <stdio.h>
6 x; S9 l- s6 ^. P5 W! e2 G2 V - #include <stdlib.h> n3 L$ k# Y: w% w
' u6 k' {2 s- {1 N8 A; C' S* I- #define DEFAULT_PORT 5150* H9 ?: Q' P; J. w9 U9 Y
- #define DEFAULT_BUFFER 2048( J8 R1 S0 l9 q* T/ i
# a2 Q+ O% \4 B' A: `* l- char szServer[128],
1 ~! _' G4 Z/ G1 Y8 Z* R$ i - szMessage[1024];
) U7 }+ U! G6 K) `* {. Z - int iPort = DEFAULT_PORT;
5 N) A% p8 n! V. x; ^1 C - % {" @4 c& H3 C8 X
- int main()
$ [1 q, s% @+ ^4 z' R0 L y* @ - {( g; U8 c: ^, X; `7 ]
- WSADATA wsd;
; }, p( [8 L# l6 C1 r$ |2 H - SOCKET sClient;+ s, [+ s2 J2 c
- char szBuffer[DEFAULT_BUFFER];( d1 Y) m4 G; b0 H4 @) K: E
- int ret;
- z; [0 ]/ y- i( i5 D& }3 R - struct sockaddr_in server;5 Q" K6 u! b# Z) L& q# [
- struct hostent *host = NULL;5 k( E( [0 r8 P" g( T' X; @1 I
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)0 A* Z# e& I* c: E9 a R
- {% U% v* a1 K8 ^
- printf("Failed to load Winsock library!\n");/ d% O% @$ ^; w; `
- return 1;
- W" W; {, Z( u3 w! s5 a - }
, e6 d0 l, {- u+ B; y - printf("Enter a string to send to server:\n");4 z; D |6 ~* H2 O: l
- gets(szMessage);
2 `3 d) y$ p' d - // Create the socket, and attempt to connect to the server
% ^8 a6 S- ?3 {3 T% Y - sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
3 s a/ J# ?% G h* K - if (sClient == INVALID_SOCKET)4 m3 U. Y% |1 x2 T1 u
- {* }: u6 {& N' U% a
- printf("socket() failed: %d\n", WSAGetLastError());& ]4 k4 A" {8 C/ N6 ]- y& a
- return 1;9 d7 r. C# O! j3 Y; z
- }4 k, V2 [1 j2 V* F
- server.sin_family = AF_INET;
# M& Y! l$ \4 H: e& B: M$ L - server.sin_port = htons(iPort);
- V; A( [/ B9 c - server.sin_addr.s_addr = inet_addr("127.0.0.1");$ g: y- O- S ~5 k D
% T4 Q) `$ F8 c- if (connect(sClient, (struct sockaddr *)&server,( Q! {; C' Q4 s4 l: |, i5 x% ?
- sizeof(server)) == SOCKET_ERROR), h! H2 l4 s) L
- {+ r7 J; G) a9 ?- H6 B4 B& v
- printf("connect() failed: %d\n", WSAGetLastError());5 t8 j1 h/ i4 P
- return 1;3 u- O/ @! Z& a
- }
$ D! z& D- G7 @$ f- g - // Send and receive data
- R1 N# A5 Y8 { - ret = send(sClient, szMessage, strlen(szMessage), 0);
( U, W$ l& G$ M- g, C- M3 ^ - if (ret == SOCKET_ERROR)/ w0 J- w. u; J0 V8 p& M8 Z5 P% e
- {% z$ }$ R4 _3 P% a b# _0 b. n2 j# O
- printf("send() failed: %d\n", WSAGetLastError());
% o; A# w# f9 o6 d - }
! k; x* h" J, W9 h2 ] - else{9 x$ l: Q" e1 W) k
- printf("Send '%s' \n", szMessage);
5 ]& |& W b5 t$ i% d6 L - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);* t& {; N. {2 t! w
- if (ret == SOCKET_ERROR){
3 j6 ^7 e& R0 A* W" c - printf("recv() failed: %d\n", WSAGetLastError());
' M- _* r9 R, b+ P- V5 H - }
( z6 g$ _0 P7 K8 n2 d* G - else{
- }. Z" `+ a4 X% l' [- K - szBuffer[ret] = '\0';! D/ B9 `2 n3 }( j2 U+ O
- printf("RECV: '%s'\n",szBuffer);$ f4 p% w6 P! I+ d& x/ M
- }' q/ i0 ~2 N& |" l
- }: l3 Y; L0 X1 `
- closesocket(sClient);( l% z2 ?2 `" K7 x
- , h, p" D4 h& [/ S, G8 j
- WSACleanup();4 ]: t* I2 @. A
- return 0;
4 C: A# `: ]8 i1 Y0 Q+ d$ g - }
复制代码 服务器程序:server.cpp$ H, M) ?3 R1 z
- #include <winsock2.h># q- A0 z/ [. L/ f$ ?& t4 Q
- #include <stdio.h>; L$ G+ _8 r: S, h- V: E
- #include <stdlib.h>
$ H5 W1 k2 |* L' p. V
9 T! D3 q; Z: J i3 x( }) X8 s' a8 j- #define DEFAULT_PORT 5150
# O3 a/ ?. C# I4 ~2 O2 Y( ~ - #define DEFAULT_BUFFER 4096$ }5 l. P) W6 W( i
1 z, A& t" s% r4 [+ Q$ Q7 O0 h: R- int iPort = DEFAULT_PORT;
0 k- h% \$ i, s$ X Z! W - char szAddress[128];
' k A* `1 ?" s$ C- L& i& Y5 Q - 6 ?4 M8 O. f, V# J2 \7 A2 w4 [4 O
- DWORD WINAPI ClientThread(LPVOID lpParam)
' P$ m1 F1 c. w7 P1 J m - {
( I' `% m( Y& [6 m- T8 f - SOCKET sock=(SOCKET)lpParam;
1 }" d. x; d! Q; H7 q; A - char szBuff[DEFAULT_BUFFER];4 c1 a- p; q7 K2 Q! I: \
- int ret;8 O! o& l f! W4 L+ e6 z; g# t
3 f2 C% |! r% c7 I. r+ ]- while(1)
$ N8 Z" A3 m7 ^* N - {
2 p0 j! k. ]% r; f4 R3 A - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
, a7 v5 z k" [* l/ n$ ? - if (ret == 0); h0 ]5 C; |+ u3 H& h x. D. `4 t
- break;2 `8 x2 l( j8 w0 T7 V) o1 O) U) b+ v
- else if (ret == SOCKET_ERROR)% y* w; y; y# b
- {* ], B- O6 N7 i# Z
- printf("recv() failed: %d\n", WSAGetLastError());
" w& s- V! [) ~& ?+ L6 @1 C( f - break;. d+ u! O9 o3 \' @4 M- B- I/ u* r
- }
3 e9 u7 s% h* c- a! b* s0 A - szBuff[ret] = '\0';+ X( i" m$ X2 e, e
- printf("RECV: '%s'\n", szBuff);, |! ?0 U' Z+ W: h' D$ l$ w0 t6 V$ @& z
- if(strcmp(szBuff,"abc")==0){
- M+ [, c2 F* B$ ` - memcpy(szBuff,"Send the correct string!",25);
5 e, u5 T g4 s$ ~! ^4 Q: x - }
1 z8 N* ?6 E$ y5 v$ e. i3 K% X1 Q - else{: R7 Z" @: a' e' X
- memcpy(szBuff,"Send the wrong string!",23);
! a i: I6 d: K; `1 N) d5 n - }. T( u' }2 V, r! `8 V
- ret = send(sock, szBuff, strlen(szBuff), 0);
7 \; \5 I$ D8 D& s2 K3 K% }4 M - if (ret == SOCKET_ERROR){1 K1 k b0 i* i3 `5 O3 @6 l$ G
- printf("send() failed: %d\n", WSAGetLastError());
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- }
$ a& j* S/ ^) q - return 0;
: a! E) x; b, c, k& g% ~: P - }
- {' t2 {0 D) b: B - + [2 a9 x" C/ j
- int main()% d# k- J; y3 H8 `
- {0 H0 G+ q z) ?+ r- B% B/ s- o' B
- WSADATA wsd;5 @- z. I2 M: T# G$ _
- SOCKET sListen,
7 h* I/ u) ]$ d* j8 ~6 j - sClient; U! @3 I; R( s
- int iAddrSize;. `+ C4 ?7 E& }' k8 @
- HANDLE hThread;
$ `2 x- G# d* |! f3 g; I9 a - DWORD dwThreadId;8 Y' `" z5 y8 Z
- struct sockaddr_in local,9 Z& u0 G5 O5 x2 t
- client;. C5 K2 M+ m) A, M
" o: b+ J$ r: ?8 ~5 @% Z- E- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
& I# y) X: H2 r# E - {! K$ ~# q$ F2 C& G/ A0 c
- printf("Failed to load Winsock!\n");
* G/ V/ R2 k# J2 e - return 1;5 ^+ g; V$ [: f- p" F8 n7 }
- }
3 Y% S: C: ]$ }" c8 ], g - // Create our listening socket: `" f; i% L' k* W
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
4 Y8 ?- N# q+ y7 \9 ? - if (sListen == SOCKET_ERROR). Z5 E$ ]( v' C% m4 k
- {' p* {) s1 d. ]' \7 i x
- printf("socket() failed: %d\n", WSAGetLastError());
- y" U; g( r# [6 d& e3 e4 E9 u( M - return 1;
4 `8 k" |6 z# Q+ T! [, ^ - }- {$ E* v. Z2 B( M
- local.sin_addr.s_addr = htonl(INADDR_ANY);
% l1 T/ @" @4 h0 G8 H. T* ] - local.sin_family = AF_INET;- @- q6 P( _) K' j
- local.sin_port = htons(iPort);
, r( z* l7 O1 m6 ]4 p) ] - & e* l0 B) J& O$ ?& `
- if (bind(sListen, (struct sockaddr *)&local,
5 R4 ]. ~" ?$ D1 n+ y - sizeof(local)) == SOCKET_ERROR)
6 h# I7 g1 |; i2 \) E) G( u) p - {
" P/ v$ p8 X0 M1 a# {9 q/ n: j/ y - printf("bind() failed: %d\n", WSAGetLastError());% i- x4 e7 M4 T" y/ v; y+ E. y
- return 1;* R, V4 k+ V- a0 x
- }# |: B1 j/ x _' u; r
- listen(sListen, 8);
/ X( S3 W# y. }9 t2 ^ - // In a continous loop, wait for incoming clients. Once one. H- k" }7 X# i9 s" a, u! t+ x
- // is detected, create a thread and pass the handle off to it.
3 s G/ `9 N' ~: K: M6 z$ n5 m - while (1)
$ r2 d' n H; C% \4 t- b0 C - {/ s5 }6 U6 m) v5 p( Z
- iAddrSize = sizeof(client);& V; L( E, U. I0 f* ?
- sClient = accept(sListen, (struct sockaddr *)&client,5 v9 j# q+ I1 @& }
- &iAddrSize); 3 c. F+ U) Q$ k1 x& T0 F
- if (sClient == INVALID_SOCKET)
' u; j" L* |6 k - {
) h _/ m$ c. M: ^. P - printf("accept() failed: %d\n", WSAGetLastError());# [6 M4 w5 X0 v$ G4 y
- break;3 z. S# R1 f0 ^! V1 t" C* N1 W
- }# X3 U1 A' Y6 G) J
- printf("Accepted client: %s:%d\n",% E5 S9 A! e2 @# ~- D) C [
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));
" E3 f F4 ], Y - 3 o* o4 ~# V4 V% D
- hThread = CreateThread(NULL, 0, ClientThread,
/ X. b% ~; ^8 E+ ?7 p - (LPVOID)sClient, 0, &dwThreadId);
/ K6 E* L3 i1 q5 _. m6 x+ P, y; f - if (hThread == NULL)
8 q( U: [: ~3 E4 j2 q; k - {/ r8 L. H2 @2 o: X. \1 \
- printf("CreateThread() failed: %d\n", GetLastError());
2 G& N; ]8 s- E- b# w - break;
, y" H$ v3 ~8 c - }
! p2 j' V7 j. K* v( g. O - CloseHandle(hThread);3 F; N* h- Q! g f% X* B8 h
- }
/ r* S8 Q+ k! D7 L4 P# q" ?5 g D6 T - closesocket(sListen);# n5 [* m4 W8 P) U0 t. n3 s
- 1 t# P; ^; Z. A/ L! [# x8 T8 n& f
- WSACleanup();
) Z9 C7 U7 o! }0 m. d1 G/ r - return 0;! w0 U9 G3 M4 ~: P( q$ y. k1 N. t
- }
复制代码
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