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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。
8 X* [8 z8 k) M9 U客户端程序:client.cpp4 |6 C7 ~! h+ _+ ^- c2 P' Y: Z9 @
- #include <winsock2.h>
) }& t8 V* o( F* ~/ k/ }" ] - #include <stdio.h>$ V: ?. B, A' o" X
- #include <stdlib.h>/ a4 [! e Y" S1 }4 b8 w/ b) i
- 6 k8 A) f3 P8 q% S
- #define DEFAULT_PORT 5150
! g0 T, b) q+ Y/ R9 P+ }/ V: B - #define DEFAULT_BUFFER 2048/ F# D( q& |' J3 K' U
- - |5 d# x U9 O6 U# |$ T# r0 [
- char szServer[128],
' a: s- {% m/ ~( h% N. k* C' v R - szMessage[1024];9 _$ K \ y1 x" s+ P0 b
- int iPort = DEFAULT_PORT;9 g' e. S2 |. y! z" v+ E* H$ u
- I' R! f9 D z0 l2 a' b: B3 J- int main()/ ^9 R( m3 X, d' V! f3 `; N
- {4 z5 F) L B8 X3 l
- WSADATA wsd;8 H. y2 w9 J5 m* R' v# N0 c. s) d
- SOCKET sClient;. _* Y2 o/ ^1 F+ x) k( y7 r
- char szBuffer[DEFAULT_BUFFER];
0 r" B9 U9 G- D+ H' Z8 c - int ret;: F, k* }" R6 O4 i
- struct sockaddr_in server;0 C/ r) w: e6 u+ \3 G. J
- struct hostent *host = NULL;
/ E V) C% T X5 S8 t - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)- N2 T* V; q- Y/ b: u) D
- {
. I6 C [+ T. j - printf("Failed to load Winsock library!\n");
& @* B, d! u/ [ `. E" f# a - return 1;& ?" c' g; k& Z
- }
5 L' C* \$ r0 B& {7 F" Z7 [ - printf("Enter a string to send to server:\n");
3 i! C) l8 c2 S! V% Z5 e/ | - gets(szMessage);) R8 R. }6 T$ ~
- // Create the socket, and attempt to connect to the server O. N( n, F+ Q, u+ w
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);7 q7 U B) G# h( Z
- if (sClient == INVALID_SOCKET)
9 n( m; G& X+ H+ }) {0 [/ ^ - {
8 N& t, o) U1 C- a7 {3 e* l - printf("socket() failed: %d\n", WSAGetLastError());
0 s9 l' Q5 @5 Y - return 1;
6 c9 |& \2 S8 K. h- A$ m - }
5 y J/ C" z* o, H/ }+ f( U5 P - server.sin_family = AF_INET;9 N9 s* H; o0 B3 W' u8 }
- server.sin_port = htons(iPort);# u* S; q4 R; r* K1 A
- server.sin_addr.s_addr = inet_addr("127.0.0.1");" m S6 N: W% {" K
- 3 g o4 e) n) V. l( Q! m. k
- if (connect(sClient, (struct sockaddr *)&server,
& }2 N! f7 B* G3 P1 Q( [7 Q - sizeof(server)) == SOCKET_ERROR)9 R1 i( f/ u1 p) m1 S- E
- {
% Y2 Q3 B* u2 D - printf("connect() failed: %d\n", WSAGetLastError());1 R+ b* P7 N* w2 F5 t
- return 1;
; }/ @) _# K7 x6 G - }# h7 i; m% F. c$ Q8 t! X
- // Send and receive data& i) J% R* m0 R8 N
- ret = send(sClient, szMessage, strlen(szMessage), 0);
" Z: L1 R3 m; I - if (ret == SOCKET_ERROR)! J' u3 F0 ] C
- {
5 q4 T0 _+ p2 B. ~, A6 u; ?0 a - printf("send() failed: %d\n", WSAGetLastError()); ^( {9 j9 I, n/ ]7 y+ N1 ~
- }8 T& M7 k6 g: g' k8 h
- else{
/ x% J h |4 c6 L& j - printf("Send '%s' \n", szMessage);8 U k, j7 Z# H3 w; G; _
- ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);) W0 t5 M( V$ q( L; N$ X
- if (ret == SOCKET_ERROR){
. O) r8 p( }) V+ s% g. h - printf("recv() failed: %d\n", WSAGetLastError());
% b7 ~, w) U/ I3 [* u* z" p. \/ D. ^ - }
; X& [0 @9 S8 z# D+ U9 ] - else{# p; O& w# Z1 Z$ C' V' q
- szBuffer[ret] = '\0';
1 |2 G- e4 g' d, }4 R$ ^ - printf("RECV: '%s'\n",szBuffer);7 N5 R! H- m6 O5 y" B7 U
- }
& x# ]* e% J0 N+ i - }
, k L8 L# S( J7 o& f& g - closesocket(sClient);
- N% G ~, }' M9 @ - 5 q' {( ~' \4 I" q
- WSACleanup();9 i9 m/ N- f# |" g+ c7 o, [+ e
- return 0;
1 R; I, c( H4 k9 ~ u% w2 L7 U - }
复制代码 服务器程序:server.cpp
! j2 Y/ ^8 J& V( i9 y- #include <winsock2.h>5 y8 ?$ g- L, g; ~
- #include <stdio.h>8 t7 }) @1 P% U: Q; c/ R
- #include <stdlib.h>
. [' a8 H4 S6 ^0 I3 B: } - 7 u1 V' U& X, A
- #define DEFAULT_PORT 5150
1 R# a" R# w3 q; m _7 Z - #define DEFAULT_BUFFER 4096
/ o, a% W7 E7 ?7 k - * I. w& P9 T% b% g4 D. ~8 D
- int iPort = DEFAULT_PORT;
6 ~6 {/ @! g5 ]9 Q+ @7 q# b - char szAddress[128];2 @/ C0 o2 ~) I+ k. l
6 b9 w2 V/ w7 C4 c- DWORD WINAPI ClientThread(LPVOID lpParam)
' N8 f2 S, Y. c& P/ u - {. v5 E b) l5 q& k& T; z6 o& U7 J6 y. e
- SOCKET sock=(SOCKET)lpParam;" K. z+ u5 a" A# _/ h: p
- char szBuff[DEFAULT_BUFFER];
# F9 c; b( k$ T, ^8 s - int ret;; o: v u- ~- j# z6 O% P6 ]
- ' f' g6 U4 t- d6 g$ R& B9 Y4 J
- while(1)0 L3 c% H: U2 [ G* i
- {
4 U8 Z# m3 ?/ U9 M - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);" O$ n9 e* |" a, e+ V% ?7 v; O
- if (ret == 0), E. i# n) e" S
- break;
5 f" b4 Y, a1 u$ {/ k% P/ D$ L - else if (ret == SOCKET_ERROR)
* V7 j* ~6 R8 @$ q8 ? - {0 ~: B* C' `' D( T- L7 R
- printf("recv() failed: %d\n", WSAGetLastError());# u$ r( W" L" I4 k* a$ a+ s
- break;
9 O# o1 o c( Y+ n0 O - }* n) o+ d- K! Z4 _. q' c, E
- szBuff[ret] = '\0';1 ^. r6 a$ Z4 e& f/ e
- printf("RECV: '%s'\n", szBuff);
4 n9 _* g( v6 G0 [* O - if(strcmp(szBuff,"abc")==0){" l. o7 X) h1 [1 T5 {+ o) e" R7 G9 q
- memcpy(szBuff,"Send the correct string!",25); O3 B) L9 `; |0 }2 G, k6 e
- }8 y$ ~/ K) J3 ? Y2 U1 y3 Y% N
- else{$ _3 k" I2 ]- K8 y4 E' J {9 _7 h
- memcpy(szBuff,"Send the wrong string!",23);6 c" O' d! P% m7 @1 W6 y
- }
7 O6 K7 L9 k7 q - ret = send(sock, szBuff, strlen(szBuff), 0);% Y& H+ x6 r( h1 p
- if (ret == SOCKET_ERROR){. y6 `4 `) H2 ], Z% U
- printf("send() failed: %d\n", WSAGetLastError()); p5 Y+ J/ S. f- D: ^) e* n8 r/ j' \
- }8 e2 ~9 ]9 e1 x/ J
- }: j P* L# ]# u- Y
- return 0;. E! m3 I" j7 H8 |
- }. w0 u J4 o: P
5 v9 L/ b- i- H/ ^- int main() E* ?) i& I5 l4 @ _
- {
) u8 B9 \9 x V* y8 z5 A% s - WSADATA wsd;% J1 f5 H; R' {) I# F
- SOCKET sListen,7 q. Z* X; f4 z
- sClient;
" c, z1 f6 J4 z - int iAddrSize;/ L& s q+ d2 y/ J% G
- HANDLE hThread;1 N5 S4 H/ K* `9 L, ~4 ]
- DWORD dwThreadId;' \ a: Q0 R( {7 J G# L7 C7 z( q
- struct sockaddr_in local,* _( R$ c* y h+ `) k0 l1 P ^
- client;
0 T! ~' H a0 g ?; [ - ! P0 B1 [: o, X" V
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
$ f7 }- H" Y* @! y- N - {( n: K/ T& b% y% L x- ]3 J8 I
- printf("Failed to load Winsock!\n");' S( d0 y7 w/ G% K# g, }
- return 1;
3 _4 M+ R& ]7 k7 p# S3 K& Q; t. n - }
+ f4 w. G) ] z& x. a/ F7 m- L - // Create our listening socket
7 T8 |& O8 j) y( g8 N - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
+ X3 P2 I8 b9 H& V - if (sListen == SOCKET_ERROR)7 M. N3 Y6 o* c& ?7 v
- {
( S- P. m& [6 z; L - printf("socket() failed: %d\n", WSAGetLastError());" g1 ~0 I, ?' I% Q! _# ~( I4 M5 N
- return 1;
9 X# j! F1 L3 r4 C9 o, G8 G0 A2 e - }
$ z9 K4 [0 F/ H) ]5 }' l - local.sin_addr.s_addr = htonl(INADDR_ANY);
' {2 [( Z! a9 @3 C- g2 d - local.sin_family = AF_INET;
% h f" q' A2 l3 ^& I - local.sin_port = htons(iPort);- E# j" ]* S! i% R5 V
6 E2 h/ Z0 q( \0 B- if (bind(sListen, (struct sockaddr *)&local,
. e; F& K' Q: U - sizeof(local)) == SOCKET_ERROR)* B' ~: L+ X9 O$ Y" [! t& j
- {
: O- \3 U3 Q1 _2 T) L! @- W - printf("bind() failed: %d\n", WSAGetLastError());
3 P5 O m, B a" ? - return 1;# o2 N8 q4 `, d. x% ?& M5 d
- }
% ~& }# _. X; U& P" t. S - listen(sListen, 8);
# g, z* c$ [, ?$ ?5 f - // In a continous loop, wait for incoming clients. Once one' x* _( \; E$ E w0 n
- // is detected, create a thread and pass the handle off to it.1 c) d" B, h! o5 V
- while (1)
, E; I' Q8 r. P5 w1 z7 U6 U. B - {
! J& E+ ]* H. \( L! ?( b - iAddrSize = sizeof(client);7 W! V$ t7 M @ n
- sClient = accept(sListen, (struct sockaddr *)&client,% N# y4 N; j1 k1 ~9 L
- &iAddrSize); : i7 j: x' Y# j. l
- if (sClient == INVALID_SOCKET)
4 Y6 v" [ m9 T - { 5 e8 z6 V" d+ r( N+ W- I6 a _
- printf("accept() failed: %d\n", WSAGetLastError());- V2 d! W" c0 I
- break;
# I4 H* g+ H6 K z - }/ J9 w, T4 B4 A& ^! q
- printf("Accepted client: %s:%d\n",: w- z0 F. [8 @( M
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));8 g: p) ~+ h# U
1 C% l/ D1 Q$ a5 ~. J. Q- hThread = CreateThread(NULL, 0, ClientThread,! v; o# s A/ x3 J
- (LPVOID)sClient, 0, &dwThreadId);
* P- w) Z2 ~; m, J - if (hThread == NULL)$ P- @" O3 K" z0 v) r
- {( n9 r4 X( _3 ^5 w: a
- printf("CreateThread() failed: %d\n", GetLastError());
5 f+ q; H! n) ^2 w! q0 a - break;
/ y9 Z+ w0 ]* X% R4 r3 o - }0 n* N+ p% W- r: }9 y7 z
- CloseHandle(hThread);
+ w: F* V* o) z - }
! }& W! w; s' ~& z5 M5 b+ o - closesocket(sListen);% Q8 G" e o" t% l* h
- : n5 S9 h% G1 @8 ~9 X
- WSACleanup();3 |1 P. P/ R5 N# ~
- return 0;$ X* H; G$ F1 G
- }
复制代码
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