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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。
+ \% T- `; j! Q& F) k客户端程序:client.cpp3 B. X, }( n; s+ ]) A/ n
- #include <winsock2.h>- ~0 z8 T: \) H0 c& r
- #include <stdio.h>9 j1 f. u3 O' y' G" d# [
- #include <stdlib.h>& u4 g& L: g2 C" f" ?3 B
a {3 _. s6 Z$ ^/ F- ~) U- #define DEFAULT_PORT 5150
2 i4 K: c. @7 z- G - #define DEFAULT_BUFFER 2048 C/ H9 h% P B7 \1 Q& v
7 F8 ~ [: B. O, D1 r: ]- ^7 Q% X# M- char szServer[128],( t- ^0 J5 [9 E3 Y
- szMessage[1024];0 ?. j8 t% d/ ]! o. b( _" S% ^
- int iPort = DEFAULT_PORT;
6 h7 X0 E1 V+ i, I7 y8 L3 T# o7 p/ v
* F* D+ }: |# o- int main()
2 N) C) _8 C- p - {
/ Q3 f3 ~* F. s2 S2 B - WSADATA wsd;+ X) U0 G9 h) k. w
- SOCKET sClient;/ F1 E8 P0 e, Q/ l8 [# E
- char szBuffer[DEFAULT_BUFFER];
, J. Q6 Y' f$ {+ h - int ret;+ Y$ S% Q, ~1 F: y
- struct sockaddr_in server;
: m: W4 }. a( V k& X/ S - struct hostent *host = NULL;1 h$ p% w( Q, k* D
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
A5 m+ h; j" v! } - {
# e5 \- h/ B) `3 R" q T N9 U - printf("Failed to load Winsock library!\n");2 e$ Z; y' e' ~5 E1 o8 t
- return 1;9 m1 m+ U: x3 z) H2 X8 H
- }% L* w! S& ^3 u: a/ N# [* }% M
- printf("Enter a string to send to server:\n");6 s& S2 h+ O2 r) r4 j9 \
- gets(szMessage);' n& z% c1 ^/ L& N# g* s6 S
- // Create the socket, and attempt to connect to the server' Z$ n" e/ v2 D, m9 r
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);6 o0 `3 a8 ^! U! x( i! _/ [
- if (sClient == INVALID_SOCKET)
5 ~, _( r5 \% V. B- c9 N0 A8 K - {2 F8 z- J' W* a' P9 l* Z0 Q
- printf("socket() failed: %d\n", WSAGetLastError());
. t; G- t2 k; n0 y/ u6 ] - return 1;4 W4 K% Y1 N4 o
- }
4 Y! c! A8 H9 _) |( q' ? - server.sin_family = AF_INET;% `) A$ g, n I3 p1 M
- server.sin_port = htons(iPort);
) H+ z, ]; }7 y0 a' Q' y8 \' V! G - server.sin_addr.s_addr = inet_addr("127.0.0.1");
, k6 P! ?& t0 A2 y( t
4 }7 l2 z9 @" |& D- if (connect(sClient, (struct sockaddr *)&server,9 l4 [& d, M: V5 o! k6 w
- sizeof(server)) == SOCKET_ERROR)
6 }+ m8 @2 L/ H$ U+ G - {
: ?/ O, ?2 Q9 o, R/ t - printf("connect() failed: %d\n", WSAGetLastError());
2 o( o8 J7 ]! z" J! \! ` - return 1; |. t" J) Y" G6 _6 n2 D6 y
- }2 \0 [4 y! @+ D: Z
- // Send and receive data
8 _: W% a% h6 I - ret = send(sClient, szMessage, strlen(szMessage), 0);
0 b& x2 H- k$ V4 g7 h - if (ret == SOCKET_ERROR)$ [" T9 t5 T( T' L" M$ ?- r
- {
@2 e9 F: d0 }! @6 k - printf("send() failed: %d\n", WSAGetLastError());
: P/ u j- T" e) w, S' X$ T0 r9 r - }* V: y+ [3 T) ~% t5 g ]) L
- else{5 y! T" V3 I3 K' N8 o1 g8 a
- printf("Send '%s' \n", szMessage);
l S2 G* @" d5 B/ u) Z - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);5 B9 J0 u+ n# p2 W6 `
- if (ret == SOCKET_ERROR){
7 b/ J" q c) z1 g0 c - printf("recv() failed: %d\n", WSAGetLastError());
% ]( z& F8 G3 x- a - }
' U9 H9 l: n. O: N - else{- l' Z' c- a; ^& Q7 N1 r
- szBuffer[ret] = '\0';3 |3 Y5 c3 `8 i& g
- printf("RECV: '%s'\n",szBuffer);
7 I4 r( S9 `. t/ R7 k' _9 E; i/ Q - }# F$ Y" d* q! t7 a. c
- }+ H" w* e, X6 s8 e, c9 N$ T* T
- closesocket(sClient);1 Z& r" d4 n* v: p
5 m K6 V/ B- l+ D4 q7 u1 `- WSACleanup();0 B. V% _$ X9 l8 E! Z) q }
- return 0;
+ L. c3 _* w- h: m3 L - }
复制代码 服务器程序:server.cpp# P6 [$ K( M7 Z
- #include <winsock2.h>8 H7 A/ p. s5 \9 I/ i7 y1 \/ l
- #include <stdio.h>: z# @) g) o1 g& o
- #include <stdlib.h>
5 r4 L! k* K* M* \ - & V, w5 N0 Y9 J0 I9 H
- #define DEFAULT_PORT 5150: T) B) |3 H9 ~0 `1 R+ F
- #define DEFAULT_BUFFER 4096
# C2 \3 _1 x6 e: ] - ; R1 b G3 B1 o* @% n3 s
- int iPort = DEFAULT_PORT;
. i- O3 o- w! N/ C/ b6 h/ V5 I - char szAddress[128];
0 @/ g# E+ e' C1 v1 T8 U* o - ( |! h2 v$ w" w
- DWORD WINAPI ClientThread(LPVOID lpParam)
7 p* S9 L$ ]( m" F" V4 ?8 [ - {3 q) _+ d* m& v0 h. ]
- SOCKET sock=(SOCKET)lpParam;
. a$ ?6 k9 U0 W. [8 ]- t, Z( `5 P - char szBuff[DEFAULT_BUFFER];* [) ]: }0 i. ?# R9 ~
- int ret;
7 ], J! {8 {1 ^4 E - ! E- O7 ~( M2 u4 f9 B# K$ r: E8 c' A
- while(1)) {. j# z- \. G) b4 ^- o8 \' h
- {" n2 ]9 ^) \2 Y( j4 h
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);" Q' }. |1 }9 U U
- if (ret == 0)( w& t" _" x( ]9 n( x
- break;" o# |, {" v5 ?* X+ U8 x& ]# K
- else if (ret == SOCKET_ERROR)4 r5 o9 G; X8 q# s. r4 t2 v& t
- {' u7 d5 ~; z( r; ]9 P3 X/ o- m
- printf("recv() failed: %d\n", WSAGetLastError());
6 i1 k, _; A8 r - break;2 A0 N; [7 d3 d/ m* f0 I5 B
- }
% D0 W# [$ i- Y - szBuff[ret] = '\0';5 Z$ l; E' b% P5 v8 b1 w
- printf("RECV: '%s'\n", szBuff);
% B4 z5 Q0 b/ ^% p: K- r - if(strcmp(szBuff,"abc")==0){
3 |" R1 P$ r) c( p( z - memcpy(szBuff,"Send the correct string!",25);
" k3 q& d% Q8 h {; _: m - }
" u# ^ j, g/ R8 q" X% S. I3 q9 T - else{. _" i9 n4 M0 k6 }+ Y x' _) Z1 {
- memcpy(szBuff,"Send the wrong string!",23);! Q" S/ l3 g$ K6 d
- }
: m5 ^! H( p- T$ X5 s4 _+ b! o' R - ret = send(sock, szBuff, strlen(szBuff), 0); h% l! v# U( @' w3 x
- if (ret == SOCKET_ERROR){
/ L5 b' n& E/ t - printf("send() failed: %d\n", WSAGetLastError());6 g$ t5 m4 x( f% _* R0 x3 p
- }3 [& h2 v5 C# J/ y0 d! u' U `4 W
- }
( g6 Z. {) N- W. A+ r - return 0;
4 X% y0 o: L' @% ?3 B% K - }; |+ d0 b, g3 A9 G" y
- ' {' v+ Q* O# x3 v6 I
- int main()8 z4 b( Z% ~8 Z
- {" F) B1 x1 w8 _+ _1 f
- WSADATA wsd;
7 ~1 ~7 _; z; |" ? - SOCKET sListen,3 Y1 N* m* n" N2 v& E! W1 B
- sClient;
; s# O9 z( a! C3 W1 A; O. ^ - int iAddrSize;
9 V7 P( ~! A& _( U, q7 R - HANDLE hThread;! }1 I- ]5 M2 n& M
- DWORD dwThreadId;8 p, J' G2 f" x6 \
- struct sockaddr_in local,
) R; |* m. e" O, L - client;
" Q1 I3 C( P' g- j4 a G
2 H" x4 H { `$ d$ @, x: P- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
) F1 v$ x3 F# _; g. a - {+ o, [ Q, Z$ h! b
- printf("Failed to load Winsock!\n");
6 n+ L2 ^7 K0 V, y& b+ j - return 1;
# Q8 n5 s$ S; i! k& |( U$ g& \ - }) i$ U0 G6 Q& d+ ] g
- // Create our listening socket
3 E0 X' j! u0 e2 X* B) d - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
: u C6 Y) L: J; y' s a8 t7 u3 b - if (sListen == SOCKET_ERROR), ]$ ~9 Z9 o* p, e) p
- {
' S0 g: g K Q3 X; ~ - printf("socket() failed: %d\n", WSAGetLastError());. M4 G0 o6 P* w; R
- return 1;
4 b/ R+ v% Z' ~ - }7 x8 h9 H- i& q" C, y+ k
- local.sin_addr.s_addr = htonl(INADDR_ANY);$ r1 u+ T1 A5 B0 |+ e
- local.sin_family = AF_INET;5 s/ m7 \" y" y6 H8 G& ]
- local.sin_port = htons(iPort);
+ H' ?: s* \0 ]! |! i7 b
0 U5 X A5 E; @! h- if (bind(sListen, (struct sockaddr *)&local,1 V% _9 M1 L2 ^+ ~& B. {0 G/ |
- sizeof(local)) == SOCKET_ERROR). K$ u' h, t; e, z( e5 _
- {
( b) M6 X+ o: l2 Y% b# m' l - printf("bind() failed: %d\n", WSAGetLastError());
3 Q$ ~$ f# Z/ k6 D ] - return 1;
+ h$ ^! \/ K% T - }
/ P' k. m/ i$ X$ @+ a* u - listen(sListen, 8);- `: S7 _7 h- H' t
- // In a continous loop, wait for incoming clients. Once one0 R9 M& P) f% c. x& e
- // is detected, create a thread and pass the handle off to it.
w% A+ k+ R1 C' _! t/ d - while (1)$ P* d# I8 @* }" v: B
- {
$ i. C$ ^ f( a* [1 r - iAddrSize = sizeof(client);
% X. l/ O- K% m1 R% c - sClient = accept(sListen, (struct sockaddr *)&client,- e8 A; a7 h C& A" `8 O
- &iAddrSize); 5 r3 C5 s0 u7 @6 p
- if (sClient == INVALID_SOCKET)) ^# ~4 Y9 O# r! \% f5 W/ Y" a
- { ( K5 `4 i3 D( p0 P
- printf("accept() failed: %d\n", WSAGetLastError());
0 `- I0 I3 r* W. g" U. H y& k0 V7 w - break;
% v* i5 m- e0 _) v! | - }4 q8 e+ U: L3 i- M" m! Y& {& i
- printf("Accepted client: %s:%d\n",) z+ u, V+ o3 p* }, }0 m. O# f
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));
6 X# M" i8 z# n$ V, Z5 o
- C7 _% l0 _0 ~- hThread = CreateThread(NULL, 0, ClientThread,* y } L4 O; \* ^
- (LPVOID)sClient, 0, &dwThreadId);( S7 B4 z. b9 U5 _9 q( a! v
- if (hThread == NULL)
) `$ Q8 ?& s" y, @5 M - {
& `6 A6 ~4 Z2 Q* c: Q2 D0 ^# @: G - printf("CreateThread() failed: %d\n", GetLastError());" V' }- k( ?! q; Q6 B
- break;8 U6 j) j: c- v& {
- }
4 `% Z% r) ^4 \, r: t2 p - CloseHandle(hThread);
* x) E, h# ?7 m' e - }0 j6 O/ z5 l$ R3 G
- closesocket(sListen);
4 o4 ]& l- V, h2 |% ^: ~ - D/ @0 ^2 N( P
- WSACleanup();0 k% F$ y: z3 {0 D" Q0 G+ E6 C
- return 0;
4 l0 i8 K4 ?$ W; i+ i7 \ - }
复制代码 5 ]: L5 ^6 w# v- e+ D5 T
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