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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。+ ^2 J G4 j3 T3 ^9 h( q6 f U
客户端程序:client.cpp& B9 }5 v' r$ A( V6 i
- #include <winsock2.h>
" X4 h8 Z, e0 }/ l) r- {7 ?1 @ - #include <stdio.h>
& b5 m, \6 j; Q% }$ ] - #include <stdlib.h>
( g& g5 i! u1 M& c- T; e
7 ]+ u6 c& O2 e4 |5 d6 W- #define DEFAULT_PORT 5150' `# p8 m% D+ M4 A
- #define DEFAULT_BUFFER 2048
' ?' f5 T3 {7 u: ]- B
F* [; Z" g: ]- char szServer[128],' T- k% {( w/ v7 v: h* ~
- szMessage[1024];0 }/ {$ B. A/ L" G) R t* |
- int iPort = DEFAULT_PORT;( i- a. ~# a( @+ C7 P/ n1 K
- / j- E) p8 Y! G( d2 _
- int main()! E4 Q* ?9 S8 k, o+ m; k7 e
- {
6 H7 _0 n) N2 s5 j# w$ r - WSADATA wsd;
3 e3 y% R. _9 | e' e - SOCKET sClient;) n* M$ {* {1 B' k% j
- char szBuffer[DEFAULT_BUFFER];. D1 i; |8 C' r. k) s/ B
- int ret;* h/ }2 ~8 I9 ~ }' t7 y
- struct sockaddr_in server;2 S7 u$ @+ }% r5 _
- struct hostent *host = NULL;; F* j1 s0 K: Z; r5 H' ]
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)" p' @9 d \: e4 f
- {
6 U# q1 l/ u( q+ r( y* {5 Z* ] - printf("Failed to load Winsock library!\n");1 b# A$ N% k$ d2 z z
- return 1;
# w6 N1 l# O! r1 g6 ~1 f! D4 v - }
* J: }4 Q2 m7 y) B - printf("Enter a string to send to server:\n");1 e7 S3 F! o& L0 t
- gets(szMessage);8 [# R$ V1 S" c8 e3 W* n
- // Create the socket, and attempt to connect to the server d6 b$ n/ ?) r# t2 K& A
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);& X0 W8 e9 U) x7 g
- if (sClient == INVALID_SOCKET)
/ R$ Q" Q0 k5 U4 N' o" e' z, r - {
. [* D8 `3 @ h7 z* E - printf("socket() failed: %d\n", WSAGetLastError());
9 l& \5 a+ g6 U, C( K - return 1;2 B# K$ b- p; X- K! l1 J
- }
; z% S8 K+ c. T! g6 ?* p. l - server.sin_family = AF_INET;
6 S; S% Z- D9 r0 ^ - server.sin_port = htons(iPort);
) Z6 C0 q$ D! U' J; t. D - server.sin_addr.s_addr = inet_addr("127.0.0.1");
! S# [. [& C2 g+ g5 w! f - 8 I# s2 ]) I* Q8 f, H
- if (connect(sClient, (struct sockaddr *)&server,+ b8 g$ \% A) M# K: Y; h
- sizeof(server)) == SOCKET_ERROR)
- G1 O2 ~* d! F: Y- r3 D8 ^ - {3 Z( _$ Y1 O- v, g
- printf("connect() failed: %d\n", WSAGetLastError());
- f0 {0 F- r- c% I# P1 D - return 1;1 A. n0 u# e. _: h
- }6 O# d: o& q6 w1 L. r$ d- N8 h
- // Send and receive data
8 m, x# j: J- Z- f0 ^ - ret = send(sClient, szMessage, strlen(szMessage), 0);
6 ]/ }. J7 Z' T( X. H& C, C/ e! K4 A - if (ret == SOCKET_ERROR)
* _9 d, K f# y9 o" n" l - {! ^$ L4 M% c' @+ F# p5 |' G. ?
- printf("send() failed: %d\n", WSAGetLastError());0 o9 A8 r$ J/ T0 U- L
- }
: R# D7 z# Z' e" V% V' S - else{0 S8 Q( q" N5 D0 l5 t4 |# B
- printf("Send '%s' \n", szMessage);
" |6 T2 g, j3 ?0 m - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);9 F4 b" R7 v# L, U
- if (ret == SOCKET_ERROR){; j+ C: r, Z. H. |1 c
- printf("recv() failed: %d\n", WSAGetLastError());
8 H) Z7 q7 L0 g, o7 b6 f& E, X - }
, M* p( l$ t( f& z- u - else{
z0 i4 k/ d/ V8 h$ q - szBuffer[ret] = '\0';( F: g$ J) D) _/ ^. g5 w
- printf("RECV: '%s'\n",szBuffer);
9 C0 x. ~2 _2 w# X) F- q s - }1 k, n8 a$ \/ T" `- w$ k9 Q: C- x
- }
9 ^. ]/ w1 z/ {2 h$ @* |( m6 | - closesocket(sClient);
* G% |, [+ U* C" E: ^( k2 Z" O
2 \8 G. U) Q# W5 t- WSACleanup();) m' V! Y+ o. j: M
- return 0;
% \# ]1 L7 k) K6 l2 |; q( i* o# b - }
复制代码 服务器程序:server.cpp5 D9 C6 C! K9 ]8 l
- #include <winsock2.h>7 s$ P& b |5 Q8 Y
- #include <stdio.h>3 l Q7 d4 B1 E# M$ H
- #include <stdlib.h>: v9 e5 y4 K* h ~5 f8 z5 d
; N) y: O l: Z. V- #define DEFAULT_PORT 5150+ _; @1 ~" r! u9 D, b% a E
- #define DEFAULT_BUFFER 4096
) { \" B# i5 q! j& M1 u3 t- T
4 c0 R' E ^* r6 ?- int iPort = DEFAULT_PORT;
) L' \8 l) h, P7 i# d. o- n& b6 m - char szAddress[128];8 J, a7 e7 C# h! T
- 2 j4 m3 s( `$ N0 r {; B% R
- DWORD WINAPI ClientThread(LPVOID lpParam)& Q& f4 n0 L5 p* B! J
- {
# V! ~! ~ `( W - SOCKET sock=(SOCKET)lpParam;- G$ ^& G' [2 \4 I b8 P- K
- char szBuff[DEFAULT_BUFFER];
+ Y9 i8 M% N3 [' j) ^3 q - int ret;
! f8 Y5 e. p }' W - 0 m6 `8 X8 i2 ~
- while(1)/ N- p" c& ?, n7 g! M3 Y
- {
Z4 w% m6 X5 U& j - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
" B- `$ t# U, o' ^0 { - if (ret == 0)( \1 k9 _5 C0 k0 j; h: K
- break;
1 J6 H Y: w+ d6 ` - else if (ret == SOCKET_ERROR), _( ]- H. N2 B. q
- {8 d' X2 B, }+ N0 A* D. a8 u! ^5 t
- printf("recv() failed: %d\n", WSAGetLastError());5 y4 ^! u- `# t) C7 z/ D8 l
- break;
% I# s+ u7 ?! n" C - }
6 H) L5 }0 P# a ? - szBuff[ret] = '\0';! [4 P! L4 r8 B* X
- printf("RECV: '%s'\n", szBuff);1 n# v0 C! @3 ^2 ^
- if(strcmp(szBuff,"abc")==0){0 t. o# @7 g- d+ ~" Q2 I
- memcpy(szBuff,"Send the correct string!",25);
$ u( U: t7 {" b - }
( L# Y% J- q3 s0 U3 u - else{
- [7 ^, ~ p. Q: W A: ?: K6 T - memcpy(szBuff,"Send the wrong string!",23);
2 ?; L% O, a6 Z" E9 |% s - }1 I# q, p/ r" C8 P
- ret = send(sock, szBuff, strlen(szBuff), 0);
3 q) i. j# L9 p* A - if (ret == SOCKET_ERROR){
7 N' c) c1 l3 `& D9 }: G - printf("send() failed: %d\n", WSAGetLastError());: b5 S* ^8 F, _6 K: H1 Z
- }
7 l' M! u) N! l' F - }. m$ Q& ^8 a) [6 X( }( b$ B& k
- return 0;
+ h5 X! U( Y7 r( [% Z5 V - }
0 d* p( w' l$ _. j4 Y - 0 E6 L7 G' I8 c: T! d. F
- int main()
% M! S9 A" k) A - {
0 f$ t5 C h( N( ~* y - WSADATA wsd;
' k L f; o2 _; q - SOCKET sListen,5 y* X* M6 q0 e; {
- sClient;
8 a* O3 i9 A7 S2 q2 v - int iAddrSize;- P. a& y" U+ [: m# j
- HANDLE hThread;6 `, n4 j. p. h8 q
- DWORD dwThreadId;
" g4 ]3 e W2 x3 B ~- j; Z - struct sockaddr_in local,: e, K! N7 b# F6 Y; k) a
- client;- M5 t& x5 y! x3 w& K7 E
- 3 l7 q& O) W& j0 u, h" Q' I
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
1 _+ x+ |- s3 u* f" p" ^; s9 a7 O% p - {
) W" y9 w' a: Z/ q - printf("Failed to load Winsock!\n");0 b% J5 B9 ^7 S+ _' [9 c
- return 1;
& h$ R+ M% } Y& L3 Z - }- z5 ^. {+ p; `; Z" R$ U
- // Create our listening socket5 B2 A- _: K/ ~
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);3 V8 Y. X; ~) r7 P
- if (sListen == SOCKET_ERROR)6 z* K/ v4 o- Q4 `+ ], o* a
- {9 v; m9 b. _; b B% |: ~ h) O t1 t
- printf("socket() failed: %d\n", WSAGetLastError());9 V/ h6 f0 u6 h
- return 1;
* Y% C1 J G2 N9 e6 @7 S- n - }+ m# @" ?# J& |5 l3 V d# \
- local.sin_addr.s_addr = htonl(INADDR_ANY);3 v# l; @& ^; W/ g
- local.sin_family = AF_INET;
: Y( K q1 e9 u2 k/ l - local.sin_port = htons(iPort);0 h. {1 ^( b; o; [$ Y
- 4 f% a8 x5 j$ u* }7 F' h7 o2 s5 O
- if (bind(sListen, (struct sockaddr *)&local,
0 v0 }! ?1 c0 l$ g - sizeof(local)) == SOCKET_ERROR)
: _- [9 v0 m. L& ]: w; l - {
; D/ I0 F7 M7 r2 C - printf("bind() failed: %d\n", WSAGetLastError());0 w" x' P4 T6 O0 o+ D% E7 r
- return 1;4 V3 Z# ?( l1 L* T
- }
! j1 q3 W1 i! l$ W+ y! _ - listen(sListen, 8);& l- `, s/ v! m: G+ X$ F2 G
- // In a continous loop, wait for incoming clients. Once one
# m' J/ g M# A3 `, ` - // is detected, create a thread and pass the handle off to it.
/ W6 ?9 @! t! q. b2 T! t - while (1)
" A: b) ]) l% l% L4 L - {: y7 [ E0 M O
- iAddrSize = sizeof(client);/ k! g8 p L; z8 j, T1 B' d1 `
- sClient = accept(sListen, (struct sockaddr *)&client,: g) b& E7 t8 R! A3 x! R- i
- &iAddrSize); ) k5 X* s/ C3 ]) B5 _* Q
- if (sClient == INVALID_SOCKET)
8 W; D( v7 [3 \+ F1 X8 @3 o - {
( G6 E5 D' ~6 D6 p# L - printf("accept() failed: %d\n", WSAGetLastError()); U3 ]8 j$ u# F/ c% D
- break;
- q- V7 p* p. ]! }( G1 p - }
6 V3 d* D3 X6 a/ Q - printf("Accepted client: %s:%d\n",
- Z U0 F: r. ~3 {" _ ~8 ]/ I - inet_ntoa(client.sin_addr), ntohs(client.sin_port));6 x) J6 b! i% X( s$ V
C. [6 K9 s- P0 S' P$ t* s- hThread = CreateThread(NULL, 0, ClientThread,
J, M; g n6 f! X4 T - (LPVOID)sClient, 0, &dwThreadId);
, z1 w5 P- t- K( e+ I - if (hThread == NULL)
. b1 k0 J! Q. ]8 r9 Z' N1 U - {
; B" F4 @: B- A - printf("CreateThread() failed: %d\n", GetLastError());) v# S; `, n1 }4 z$ l9 Y( H
- break;* S V, Y! C. D$ E" Q
- }
! d; F5 g4 e. r' u3 h6 z - CloseHandle(hThread);
: I% `: U0 A+ e6 S# [1 g9 S* U5 V - }
6 b) \ R% I4 [5 O( u$ n+ g - closesocket(sListen); D" u* U+ y- {9 ]
- 1 H4 `0 J4 ~1 W
- WSACleanup();
! d6 b3 j9 [$ i# f0 a6 H7 k7 e - return 0;8 a/ H7 L5 R! k# U: A' M
- }
复制代码 # X" T' f* w2 d3 g
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/ F, d+ K1 \2 v7 M& p8 y; Z7 Q% X' U6 M3 b) c# o
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