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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。; _ z( |7 q' |+ ?9 @) F, F% R( v
客户端程序:client.cpp& }' ]! `3 W5 t. |7 u: M, A
- #include <winsock2.h>
! O$ T' {. k1 u( g% W: a - #include <stdio.h>, ? [5 S+ n( m3 q0 N) B( g2 d
- #include <stdlib.h>4 ~. z- b9 d0 L( H1 ~: G8 e
& i+ d- P, _. @( M; p/ y- #define DEFAULT_PORT 5150* e' y6 y% r% j# ?/ w. b0 h
- #define DEFAULT_BUFFER 2048
: G; V$ M8 Z0 z8 i- c# D* g$ J! u - # V. Z6 U# I# a; p. m
- char szServer[128],
, W- H2 D! g+ H: g4 g6 c# _ - szMessage[1024];
^3 } w/ ]% T* v - int iPort = DEFAULT_PORT;, D# Y* N C- b' _6 \. m9 o
- ' N2 R* g/ G4 R/ Y
- int main() G7 E6 ^+ l' P8 i
- {" x9 G( G0 }, }; z" R
- WSADATA wsd;1 D u A. H: i$ _& U3 t1 M
- SOCKET sClient;
7 o; _& I$ f$ W, R4 y1 b( m - char szBuffer[DEFAULT_BUFFER];3 V. ?6 E4 g! E" j2 L# s! J7 o
- int ret;
- [) o( I: P% t - struct sockaddr_in server;
: M) M. Q* u8 t) }# P! V! \ - struct hostent *host = NULL;7 I; L4 s* _# _7 N$ n# A* a( n' v
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)$ E7 ]) I' @) w5 R2 w1 j- V
- {5 T; w* Q' t' Z/ o* `9 f# y8 c
- printf("Failed to load Winsock library!\n");
# v2 h/ c0 O; z5 b5 j! X - return 1;
" b+ ?. v/ G# }& T7 n - }% w( J! f( E) G4 f; R3 ?
- printf("Enter a string to send to server:\n");
' `4 p# `$ K. p) h: A - gets(szMessage);6 \% |' C V, b4 w! Q/ H
- // Create the socket, and attempt to connect to the server0 S- A" ]4 l2 h1 v, y
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
! d1 ]* Y. |% ~+ i% F4 @ - if (sClient == INVALID_SOCKET)* p+ H& M" W* F% l, ~3 O
- {) b! X* F7 ]* }8 l
- printf("socket() failed: %d\n", WSAGetLastError());
- k% t2 q0 E8 N - return 1;! {6 y( s6 H2 j7 j: w( {0 @# `- ^: E6 y
- }
$ t! D! |* U4 l% W; A9 I - server.sin_family = AF_INET;
+ M: D. ]2 A$ f" i3 i0 t - server.sin_port = htons(iPort);
e' O% N$ H0 U4 p- s - server.sin_addr.s_addr = inet_addr("127.0.0.1");7 ?' U; `" Z7 c
3 E# O6 m2 ]/ A4 O% U5 I: l/ Q- if (connect(sClient, (struct sockaddr *)&server,
$ \; \! H. K0 P. k - sizeof(server)) == SOCKET_ERROR)' F7 n8 R1 \6 q% O
- {& k7 ?' I0 o! l& A9 J
- printf("connect() failed: %d\n", WSAGetLastError());
* L; X U: E3 E" K3 n# x; o9 a. E - return 1;
* y: X8 Y) c4 |- D - }5 m3 F; e# K* h; I; o, F' {5 E W
- // Send and receive data
) j+ M& R, n) L - ret = send(sClient, szMessage, strlen(szMessage), 0);
" M/ {! L8 Q: o/ T" ] - if (ret == SOCKET_ERROR)/ \9 K, V* m' {( V# q. [
- {
! n" H9 F' r, @ s9 X. [" ]$ { - printf("send() failed: %d\n", WSAGetLastError());0 [* R [ W9 j# j) J
- }. G$ T, E& I# x( W7 w( `
- else{5 J8 |$ e& W8 i. \
- printf("Send '%s' \n", szMessage);
8 V) G/ |1 U7 r; @) c1 X) v - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
1 c4 U7 X1 Y" I9 \% u - if (ret == SOCKET_ERROR){) ]( A! l1 t, m3 r
- printf("recv() failed: %d\n", WSAGetLastError());
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- else{
& d8 t- ^, k1 ~( J8 C; ~- ^ - szBuffer[ret] = '\0';. m( z# G2 S9 d9 [+ ^+ Y
- printf("RECV: '%s'\n",szBuffer);9 c3 R0 S' f' O' v5 m1 v. z/ A/ L
- }
% {4 f* n7 v: j. O, | \! E7 i) q8 Q - }
- J7 A, X5 K( A" A; o& }8 f - closesocket(sClient);, [* n5 m' k$ r2 w8 N
7 o0 o5 `7 k5 H9 [. S3 l! a) `- i: \- WSACleanup();" e( g! k6 m+ ] }$ i6 n
- return 0;
" a" a: V* ~, V" O' n8 i3 o - }
复制代码 服务器程序:server.cpp
% h1 n( }8 S: v( l# M3 g- #include <winsock2.h>; S: @3 M- j( q( f0 X. }
- #include <stdio.h>2 f, w$ {4 n. r3 D* U, A5 P' y# [0 ]
- #include <stdlib.h>8 x' P( t) q6 C" Y
- 1 Z, W9 x' I9 {
- #define DEFAULT_PORT 51504 ?- W! o" z/ r0 H6 i/ p
- #define DEFAULT_BUFFER 40965 ]& K! z* p h* w' z* t
- " z6 ]1 a. O" o* S- k
- int iPort = DEFAULT_PORT;, K9 d: s/ I, k9 v" j( y' k- J
- char szAddress[128];' _5 y; y5 d. v7 f
: s# q+ B9 Y, X2 _- ]2 ~+ s( `& _- DWORD WINAPI ClientThread(LPVOID lpParam)
/ o& T1 O- V0 ^0 Q" a: r5 W" x - {
- m: U- ?0 Z- |' k" ?, e - SOCKET sock=(SOCKET)lpParam;5 d3 v$ e* A8 b% S4 V! u
- char szBuff[DEFAULT_BUFFER];; p/ H& {# w, m+ M+ s0 V
- int ret;
' V! Z" I# |9 n- _& Y - 4 o& d6 e- k! j0 ^' L
- while(1)
: l2 S' L3 [- ~! {- U. V - {
; y) Q: v* W5 Z: p2 ]+ W1 m - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
2 o7 s# ^ K5 X, h/ N4 @ V, I! n - if (ret == 0)
7 r# L6 l# e$ R9 r - break;2 \; {& k& Z2 `! t' W+ N
- else if (ret == SOCKET_ERROR)' A9 }( ?; g8 S. _( \
- {
i1 M% `. v% J2 L7 } r. ^ - printf("recv() failed: %d\n", WSAGetLastError());! B$ K9 e3 x2 I5 W8 z u
- break;2 c. C8 _1 ^1 w) I
- }
4 j% @5 D2 J! P! l - szBuff[ret] = '\0';0 ^( @' t% e) ]2 L9 R
- printf("RECV: '%s'\n", szBuff);5 N5 d" W6 g- G1 G: v6 S A }
- if(strcmp(szBuff,"abc")==0){
( v3 J; h5 h- D f - memcpy(szBuff,"Send the correct string!",25);
' H3 x' j c- \& u! j* S$ w - }# l* F; [9 L) |9 Z; V; l$ B' w. M c
- else{8 o( O& P2 p& O2 s( v, }- }! X
- memcpy(szBuff,"Send the wrong string!",23);3 l6 x. p$ d" J* E( K
- }
# u5 C: s$ Q8 U$ I$ C - ret = send(sock, szBuff, strlen(szBuff), 0);
% {; A$ E7 Y: O9 n. s - if (ret == SOCKET_ERROR){0 o0 z* k: S1 m! i7 v$ M
- printf("send() failed: %d\n", WSAGetLastError());
& l3 e& e/ |) {/ J: n7 o - }1 f7 e1 P9 _$ D+ K
- }( V9 E! u& [' u, Y5 `* ?
- return 0;
$ o/ i3 S$ a0 ^$ X9 V1 G - } [% W& @0 s& A' [" ? a
- 7 i& [: q0 V: S# g7 U* m% [
- int main()9 R, q8 N3 J7 F8 [+ }
- {
6 Z! F0 P% L& s# G, x% K; H- A - WSADATA wsd;# `& P' k6 ^& C) x7 Z$ c) i
- SOCKET sListen,
5 k; |3 d9 M5 Z2 |$ o7 W - sClient;
0 u$ E. ^* G1 @5 R+ {6 U - int iAddrSize;
8 x; \3 U' M- l& b- k$ S - HANDLE hThread;4 W; t- a5 K" {2 t& p7 j
- DWORD dwThreadId;
/ b- N- P4 X0 |* M- K - struct sockaddr_in local,4 B9 E/ i2 a& Q9 l1 B# ]
- client;
/ m" V7 A2 M8 r' Y5 K/ L+ S7 w - , ]! U8 h+ y3 U- B, H9 x
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)6 a% q4 h/ a" R4 Z. R
- {
3 @) p7 h3 x* J' Z- U. F - printf("Failed to load Winsock!\n");+ }3 f. ?' W# a. r, ]2 ], Q4 q. o1 z
- return 1;: [0 k+ v, M- w" j. J
- }
8 U" |( d* l+ }4 k - // Create our listening socket8 P1 R. ^! R# b2 g: n/ Y6 B) R5 F! W
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
' _$ ^& w9 l$ A: l3 l0 A$ M - if (sListen == SOCKET_ERROR)
9 f. R" a& J. c - {7 ]- u& f0 T R% E; |
- printf("socket() failed: %d\n", WSAGetLastError());; g w1 u. T0 N8 f! y
- return 1;
5 S. y4 X% s! [ - }. k" @& C+ L7 w/ q4 n- \2 _9 \
- local.sin_addr.s_addr = htonl(INADDR_ANY);
5 F% t% [- T5 [ R; E - local.sin_family = AF_INET;7 U: b6 h* r) L l- ^) ]# r
- local.sin_port = htons(iPort);' a2 v k3 k# N' M, v5 e
5 m- n: k3 y O, u5 X4 y- if (bind(sListen, (struct sockaddr *)&local,
6 }) v6 u6 M2 I+ U - sizeof(local)) == SOCKET_ERROR). Z/ N, ^ a4 s4 m+ W/ Q5 l E. f
- {: m8 S1 Q, H: d' T# s- W! v7 ~) B
- printf("bind() failed: %d\n", WSAGetLastError());6 A, I2 J7 [2 |. ]9 M6 M) D: n2 Y
- return 1;
6 _- D; v1 A8 Y" B6 ], s) z - }! u3 E* s- v9 W0 v) E5 |
- listen(sListen, 8);, p, l6 z9 i- r; a/ h* u$ A! v
- // In a continous loop, wait for incoming clients. Once one
: V1 R- T9 l6 n8 m. a( e - // is detected, create a thread and pass the handle off to it.9 Y8 i1 I6 J% U( l! q
- while (1)
6 e# `8 D- ]9 R: s% T# j! Z6 O; { - {3 P- x# [& h2 \. s ^
- iAddrSize = sizeof(client);5 @/ `1 Q5 ^0 o$ h
- sClient = accept(sListen, (struct sockaddr *)&client,
( }! A8 g7 o- s - &iAddrSize); / C$ E0 m& \- U$ r% k0 S/ ~7 e
- if (sClient == INVALID_SOCKET): E4 p/ `5 f: H9 g R
- { u3 d* z; l. g$ i% @$ V, u
- printf("accept() failed: %d\n", WSAGetLastError());$ _! m. {& A% |+ c* ]
- break;% R# A+ h# O( O0 |7 P# Z2 c* p6 K- g
- }
5 B; a. I2 Z( H7 S$ a - printf("Accepted client: %s:%d\n",& ~5 ]( e. y' {8 V- t
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));
9 _ H# ^; I. i' E5 ` v. e
7 R+ e, c/ l: u) a" `3 }- hThread = CreateThread(NULL, 0, ClientThread,% i) ?: P" _ V+ l# H* |
- (LPVOID)sClient, 0, &dwThreadId);+ q$ V5 `2 T0 [: j5 c# R
- if (hThread == NULL)( e0 Z9 w& u3 T+ I( [
- {
1 C# l, y: }3 L) D% | - printf("CreateThread() failed: %d\n", GetLastError());( v) p0 b. p1 H Z W6 y
- break;8 L8 _( C$ O R* h% L8 K2 f: y j" O
- }
$ o7 J* L& Q' | I - CloseHandle(hThread);
2 k+ }* ]; E/ m* K( _0 [* m - }
$ z* }+ O$ P8 F! Q - closesocket(sListen);
) T% H Y3 {- X" Q -
2 q) }& ^/ H$ q# w# b- @5 {& V% D - WSACleanup();# z h" [. ~) T
- return 0;' g- ]1 B. p3 Q$ p
- }
复制代码
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