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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。) j- L; E0 f$ H* B
客户端程序:client.cpp4 T V8 Z4 W% O- b( M
- #include <winsock2.h>$ p* {: Y( E) f' f, v
- #include <stdio.h>5 d0 W" B( Z% [+ q0 D1 G& y! J( t$ }7 n
- #include <stdlib.h>. |! ^* @* S8 D i. B C+ g
3 }& i: K8 ?1 r5 \9 W7 F- #define DEFAULT_PORT 5150
2 C" {5 S0 w' J% {8 L4 v - #define DEFAULT_BUFFER 2048( b" l" I$ `3 ^( h: G1 w
, V, e- [* N$ C+ [- char szServer[128],) t; \0 s2 Z9 P: F" w( z- x
- szMessage[1024];
( O( t: Y5 @* W+ ^" D! Y - int iPort = DEFAULT_PORT;, q8 C. D3 ]7 y5 A* G! C+ M, b
; A3 M: h9 W: J: B" @; R4 |; b- int main()4 F8 _5 }! _) i% B2 |
- {3 s* _9 H, l1 }# k9 W9 r
- WSADATA wsd;
& h: p! G* h& T; q8 L* T8 s - SOCKET sClient;
: ?2 [3 N$ Y$ r: O, o4 R' f7 q8 | - char szBuffer[DEFAULT_BUFFER];2 ]) G. a+ U. Q
- int ret;
! e# @' t; h. I9 { - struct sockaddr_in server;+ a+ y- m+ k, s: [8 }
- struct hostent *host = NULL;0 u s+ H2 ?1 F4 O
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
- m6 g- [% F- p- I+ ^8 @7 o - {
/ D! w% W6 n5 f5 p) [ - printf("Failed to load Winsock library!\n");
+ R4 y3 {: X/ o; ^$ O+ e5 P - return 1;' _! E7 j3 l! N6 e+ j) ~5 M
- }
7 a6 }: ~4 E w2 t( ?/ ^ - printf("Enter a string to send to server:\n");
' ~! U4 k2 D: a4 m. q4 `- e$ U - gets(szMessage); P7 w+ h- W$ B( V, e4 F; x
- // Create the socket, and attempt to connect to the server) t/ {* [) E+ l4 z- Q1 Z( O% q
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
# h, Q5 d+ C& W+ A - if (sClient == INVALID_SOCKET)
' k6 g/ F+ J+ M7 O5 w - {* _6 r4 U5 S" k, V
- printf("socket() failed: %d\n", WSAGetLastError());4 h$ D; D2 h' t3 `- ~
- return 1;9 Y7 F- w4 @$ _9 X9 B W$ e1 d
- }
; F N# O- [5 g; z' p - server.sin_family = AF_INET;+ `. l" U% w* d
- server.sin_port = htons(iPort);; E2 r: Q! E! f. U: r5 ^
- server.sin_addr.s_addr = inet_addr("127.0.0.1");
: ]/ L6 V" J2 `( I - 4 S! \& f2 M6 @" Z$ x
- if (connect(sClient, (struct sockaddr *)&server,
( O# f+ C8 ?/ c$ k% e3 R9 F - sizeof(server)) == SOCKET_ERROR)
" b1 S7 Q7 a% O" v$ Y6 k9 K - {" G" E: u: u" x0 b4 ~
- printf("connect() failed: %d\n", WSAGetLastError());
0 u% W' V8 s- [1 l/ i$ ]% m2 G% q - return 1;* p+ `% _/ r8 k1 T/ Q" C) U
- }
' N, l; o7 S5 I9 ~* w: E$ C - // Send and receive data# a! e# P9 ]7 B: L' b5 q
- ret = send(sClient, szMessage, strlen(szMessage), 0);0 w4 H* N( K, ~
- if (ret == SOCKET_ERROR)6 G4 B4 J% H$ b( B! G
- {9 T# q/ S8 Q# `8 e+ C
- printf("send() failed: %d\n", WSAGetLastError());4 H- l! X$ h3 |# ^
- }- k7 G. J5 z4 x6 n' Z0 O3 p3 Y Z5 Z1 e
- else{
+ W: Q) o8 ?0 V+ C - printf("Send '%s' \n", szMessage);) P# f& X1 x2 s8 [. i+ K9 F* c+ V+ @
- ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
7 G. y7 i) O" o - if (ret == SOCKET_ERROR){, Q. P! ^8 E3 h4 _- C# f$ K
- printf("recv() failed: %d\n", WSAGetLastError());# m' l9 p% D7 R4 a
- }, Q/ m f* I$ N+ U
- else{. |5 T. [5 s) u2 q4 i) f6 E4 {
- szBuffer[ret] = '\0';% K8 |7 V% H% B
- printf("RECV: '%s'\n",szBuffer);6 j& e4 g' v* \
- }
" P$ q0 B3 f: z& e1 }- W1 M - }) D$ x. f) L/ {9 V$ }! B
- closesocket(sClient);. N1 Z4 I2 w- {, U' r
- , Z% w' @4 h4 }' |) M! s
- WSACleanup();
" H6 o ]6 Y* Q, F- | - return 0;
9 V$ o$ L" G) D A$ H" Q( O, k' G' ^ J - }
复制代码 服务器程序:server.cpp2 l) s" i) B0 {6 E. b
- #include <winsock2.h>
; X, K0 }2 s# T; X) M& Y - #include <stdio.h>( J# X/ v' _* Z8 w% m
- #include <stdlib.h>
: Q2 w: m5 J$ K- k - 7 o/ F" t& o2 M
- #define DEFAULT_PORT 5150; L; z' y# X* d( g* v. g4 \0 O2 w* c
- #define DEFAULT_BUFFER 4096
" b% w G. n5 }) y+ X - . v5 k4 M. J$ o' l) J
- int iPort = DEFAULT_PORT;
5 Q; n9 f5 }1 D& n - char szAddress[128];
+ S6 Y7 {# W1 u+ U- e+ Y/ b - & j, S# K/ O6 H1 [$ Y( M
- DWORD WINAPI ClientThread(LPVOID lpParam)
' v' `7 n" L" A# J# u: `! B& M L - {
5 O" Y4 p- R4 I3 u$ W# Z- {0 f - SOCKET sock=(SOCKET)lpParam;
' l$ P- J) w; H - char szBuff[DEFAULT_BUFFER];8 N; d7 e- S4 ]: S6 t$ Q
- int ret;
4 T& ^/ r$ ~! W - " d" [4 `& X6 ]! M
- while(1). Y) A7 H% F+ @/ G4 X6 G0 a
- {( R" f3 @3 i; Z# c' {* E# B
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
' {( @& ` I8 T1 A- s; @8 y# l6 k - if (ret == 0)
, S( B e9 k3 ~4 z3 |1 }' F - break;
) r$ X( T; B4 K" M/ l3 Z: j - else if (ret == SOCKET_ERROR)& d' H, d. @# `; j
- {5 D& W/ v! ^6 C U8 c8 i
- printf("recv() failed: %d\n", WSAGetLastError());# A. m! j' R" B; Q, e" O# i
- break;
2 r0 S3 [7 \% P* T - }- [/ Y7 ^6 M% ` _! Z
- szBuff[ret] = '\0';% u6 m( ^. k4 |3 M" P! P- D) C
- printf("RECV: '%s'\n", szBuff);8 Q: M, k8 r% Y# K2 h0 d
- if(strcmp(szBuff,"abc")==0){
- @2 a5 z6 v. ~% o/ A - memcpy(szBuff,"Send the correct string!",25);
) |* i0 }6 c9 s' y& |- a7 W# |9 ` - }
& M4 h, y$ ~6 b# H* ?" g - else{# m3 p$ A5 M# S* |! ]% h. Q
- memcpy(szBuff,"Send the wrong string!",23);
2 `- e7 \- {* V - }
2 Y, \/ s; ?7 @0 U' U - ret = send(sock, szBuff, strlen(szBuff), 0);2 j" x& @7 E+ L- Q" H
- if (ret == SOCKET_ERROR){! e3 }' v$ O5 [7 z1 L$ U. u6 _
- printf("send() failed: %d\n", WSAGetLastError());
0 r% ]1 Q, B6 f - }8 k! [& v2 J1 i. q# x
- }
; {, L5 j$ N3 `1 _# A( x - return 0;
9 x; [; [+ q' S9 U. i - }
1 G( j, E) f* ^$ g8 ~, @ F5 Q5 p
6 z; Y, h4 Q- g( @- int main()! }0 o. r* V% H2 N% {1 a W
- {
, Y2 r+ n& v3 c+ z& d5 q - WSADATA wsd;
. d. O+ k0 T+ b8 h" J+ y0 n - SOCKET sListen,' B e+ j7 N; u
- sClient;# {; |: ?! l: x: H6 L
- int iAddrSize;$ z# I; d- L, Z
- HANDLE hThread;7 `6 S7 K8 V8 d" e
- DWORD dwThreadId;6 p& Q8 |% t. r. q
- struct sockaddr_in local,- j. s$ [" h' X/ }
- client;- F. i% Q7 z8 Y
- / [3 O: l% r& ]' e/ E* v
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)4 Z/ B4 _' q; }0 x; i3 F
- {- ~5 M! k5 @1 N
- printf("Failed to load Winsock!\n");: Q9 T) G9 {' m& l
- return 1;* Z. k+ S- C2 ~% V7 r, m
- }
- k1 J" s( w W* ~ - // Create our listening socket
: c. y( T* f- Y; h4 X/ c - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);4 }& p) n5 K; Q8 f ?
- if (sListen == SOCKET_ERROR)
$ Q3 K$ l3 E0 f; Y9 C - {
5 [+ R! j7 Y. X% W; A6 W0 d) |/ B - printf("socket() failed: %d\n", WSAGetLastError());
5 a% I8 A; n( C$ f& }( R) b% d - return 1;! r" x& ?4 B. T% O' C U! l( x
- }
+ G% \2 W% l1 Y } - local.sin_addr.s_addr = htonl(INADDR_ANY);
( B% }+ b: @# k! E' g9 b- D - local.sin_family = AF_INET;
9 p7 a- k+ m! T$ M - local.sin_port = htons(iPort);
! g$ ^* R$ |2 H+ f# p6 k - ' B+ e; I0 E! }
- if (bind(sListen, (struct sockaddr *)&local,# w4 l- M! W- @0 C3 D9 {* [+ x
- sizeof(local)) == SOCKET_ERROR)
0 s# M% h& Z" L+ x' ` - {7 W5 k7 @' Y) y- L3 Z
- printf("bind() failed: %d\n", WSAGetLastError());
" a5 r2 n6 q1 S4 j% ~ - return 1;
0 k v4 p2 }( Y8 a - }( F. b, k$ s" a, K: W
- listen(sListen, 8);6 A' i2 Z& i5 B) r% }; { j) r
- // In a continous loop, wait for incoming clients. Once one
/ F4 A" w5 m. d" d& k% Y& m - // is detected, create a thread and pass the handle off to it.4 I. W+ D& ~1 b2 S6 k
- while (1)
8 |+ L. P! f0 a' V8 W/ ]1 u - {
) M; W/ K. ?3 c; @9 p - iAddrSize = sizeof(client);5 ^4 M' ]) w o$ k# H' M; m
- sClient = accept(sListen, (struct sockaddr *)&client,
# q: L. I: }/ ^1 q0 _. s( U# h - &iAddrSize);
8 u3 V( m& r' v3 [) r; v0 I$ w - if (sClient == INVALID_SOCKET)
5 W# w5 i$ i9 Q- k. l; i k - {
e* E$ \0 G P3 S! ] - printf("accept() failed: %d\n", WSAGetLastError());
4 d: L+ m# u' w6 I' v; t2 z& T$ S - break;
! r7 a% R' ?; ]) ] - }6 q9 u2 F8 J9 _4 T" Z: @
- printf("Accepted client: %s:%d\n",. J$ G7 A9 u: k i8 C3 g
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));9 i4 z* Y5 A! E; w+ { P6 @
5 v1 n0 m& N- B# g! r2 F- hThread = CreateThread(NULL, 0, ClientThread,
/ O2 k% L5 a7 B: {- K3 v* r3 l - (LPVOID)sClient, 0, &dwThreadId);
) ?$ p7 X1 G1 f; F" B - if (hThread == NULL)
: D6 i3 y \- ^) i - {
2 j; B" S1 v# ~( X& t) N - printf("CreateThread() failed: %d\n", GetLastError());
% p5 J( y2 S1 E3 Z - break;
+ E7 A. f0 R; Z4 G/ r - }
6 \' [- C! r% r# u' g - CloseHandle(hThread);
7 P: `( h7 d% C4 C - }
/ R) v. |+ r' L" o6 ?6 J' G - closesocket(sListen);4 B3 O0 K8 k' e/ L
-
! I) X6 ]: R8 I7 K - WSACleanup();
7 K: e$ Y7 d- }; I - return 0;* c; @6 G8 p5 m! X8 f1 \8 Q
- }
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