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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。% g; W: y% K: q% c
客户端程序:client.cpp) W$ b b5 d' g* t8 ?$ ]
- #include <winsock2.h>
4 i$ b( }1 U/ @& \& M8 g& J3 k - #include <stdio.h>
% l+ i* k4 Y) V$ K8 ~ - #include <stdlib.h>( Y6 s+ \4 g$ Q, b8 m! [4 v- ]2 p
- 6 ]* v7 u& s6 p2 i* d
- #define DEFAULT_PORT 5150
. B( z% q' n8 m; b3 F& L1 }) [0 ~7 Q - #define DEFAULT_BUFFER 2048
, @4 T9 z, u" t g3 H/ K& L+ n - % v3 @- O" L' g( z7 f
- char szServer[128],
5 J0 S/ W0 {) e. O I - szMessage[1024];
; U/ [' `! X& T! s2 x- G( | - int iPort = DEFAULT_PORT;) i0 [8 z# m) |2 ?1 S# G
) I- _9 Y9 h! G! k6 F- int main()
! X4 y+ d5 }; Y' v3 Z, l$ G0 D3 X - {5 O! L$ {5 @% Y4 Z$ U
- WSADATA wsd;! n/ \* k; |* f! d" x4 k+ W0 S/ m
- SOCKET sClient;
4 B8 M9 b# `. H. Z% E3 e7 o+ N - char szBuffer[DEFAULT_BUFFER];1 e! q6 _% J. _- P1 |3 M' S
- int ret;
3 l2 t& t2 @3 w: N - struct sockaddr_in server;' j5 m$ r A! T2 G! \% u8 c
- struct hostent *host = NULL;- }3 M' v( K" n. y
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)2 O3 d9 f& H4 y. F, `4 h" `
- {
! R/ D% n3 H" s, L1 ^4 l - printf("Failed to load Winsock library!\n");
' X1 o' A3 M) g; F# E - return 1;
% q+ \9 X- b( s& v& g7 \7 v - }
7 e i/ ~5 |1 ?+ E" ?8 v - printf("Enter a string to send to server:\n");; p0 d+ q1 n) @2 B0 z/ S j
- gets(szMessage);) Q3 t; b: X. v! ]; C2 p6 ]% V
- // Create the socket, and attempt to connect to the server0 C; F: b3 Z) V# B0 W/ n! G
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
/ M3 h$ T0 I& j! T7 B( E% L- T* O - if (sClient == INVALID_SOCKET)) B4 q! |) U/ p/ i
- {
3 J! Z i* r3 y- D0 h+ f* `5 P - printf("socket() failed: %d\n", WSAGetLastError());; R0 f' w8 W9 ^' b4 R( Y
- return 1;7 }% x; c3 D( x0 C
- }' U: r7 ~ ~" V; m+ X& s
- server.sin_family = AF_INET;
; H/ H! t4 ?7 I* h; G- n2 a - server.sin_port = htons(iPort);' Q* v- E m3 G- L1 v0 U) U, \
- server.sin_addr.s_addr = inet_addr("127.0.0.1");
9 i" H1 |1 Y# i) i: T
1 L a7 A3 |' }- if (connect(sClient, (struct sockaddr *)&server,
& n+ b: L( X& h0 D/ S y3 l - sizeof(server)) == SOCKET_ERROR)" m1 t' u7 s/ Y/ O
- {
* ^; P# Y1 N8 e! C5 N2 P6 T - printf("connect() failed: %d\n", WSAGetLastError());9 s) i9 A! r9 N3 @7 i6 z
- return 1;
+ T) G3 j: |) g/ F: v' B. O - }
) ~# `$ R" ]1 F5 S# b2 M/ Z- x/ H - // Send and receive data
, M2 M; c# b' l2 R7 r - ret = send(sClient, szMessage, strlen(szMessage), 0);* a4 C' H- r) Z, m3 {0 N! c8 _
- if (ret == SOCKET_ERROR)' M7 ^% m; h: t- `0 }' k% z
- {
8 d8 P! K; A6 w - printf("send() failed: %d\n", WSAGetLastError());& _) z* V/ ?# R" d1 k1 l
- }3 W( V2 s% c9 y3 E$ m" W
- else{0 Z' |. C% S; w
- printf("Send '%s' \n", szMessage);
0 Z ]& x. y7 T" i7 F - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);$ i$ ^0 v5 p9 o) W8 b+ t& M8 O
- if (ret == SOCKET_ERROR){7 I x4 l4 U- }. f
- printf("recv() failed: %d\n", WSAGetLastError());
0 v; E* {2 k, e6 `& x! Z - }
5 F' ^+ c! O1 @/ Y% L: [: p4 w& ^ - else{
# N* q- e! O$ ?% n! J# i# x8 c - szBuffer[ret] = '\0';
4 Q0 Y$ k: p$ @7 C0 s/ v - printf("RECV: '%s'\n",szBuffer);" l3 }9 y, e& F# P2 o
- }# q% e" t, |) a1 X5 f: U* B7 E
- }8 b' D9 s. [, q2 E# p# J
- closesocket(sClient);' ]0 k8 i7 t* l% H- h8 m' P q
& o7 K: f7 V8 l- WSACleanup();
4 J5 f0 q$ I/ ^ - return 0;8 N5 n- G3 a" g& m+ ?
- }
复制代码 服务器程序:server.cpp
! m: g/ H4 Q( T v- #include <winsock2.h>
, i, |' m W8 ^ L) j! }2 h6 p - #include <stdio.h>- \5 w$ e! E, ? g
- #include <stdlib.h>
6 N7 O$ O: c) o7 F4 a+ [0 N: ]
4 I8 u' o9 L; C t* X$ R" W: k- #define DEFAULT_PORT 5150
# I; j6 p, ^4 N6 G& K { - #define DEFAULT_BUFFER 4096
- u/ h# c( q% G; k/ n
8 v% O! \5 I* j, ^. w, X& s* n- int iPort = DEFAULT_PORT;2 r1 A! n9 S7 P8 _
- char szAddress[128];
9 I5 z' J) Q) \ - 4 O! X1 F, p2 b9 M! Z
- DWORD WINAPI ClientThread(LPVOID lpParam)
7 x6 w; h# t7 j/ e; X! Y8 N - {
" a" ~/ i; s, s; n ^- f! b! R" q - SOCKET sock=(SOCKET)lpParam;
) w9 T" V7 V) [- Y - char szBuff[DEFAULT_BUFFER];1 r( A. t( S3 D Z- \- n; o4 P
- int ret;' ~. p0 v; s8 s8 p9 M
2 g! A$ l2 P6 M1 C$ C! `- while(1)9 g8 i6 o; {7 [) p- m
- {
8 }' ]1 a/ i9 m* f4 S: c - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);/ d8 X/ I" P1 H
- if (ret == 0)2 ]8 N7 I; f- X- E* E
- break;9 A* _1 g* Q1 ?, K; d' K+ k# u7 N. ?
- else if (ret == SOCKET_ERROR)
* f2 {" H L- x& i0 z; ^( J4 s - {
5 y/ u; y8 h6 _) Q - printf("recv() failed: %d\n", WSAGetLastError());
2 V1 L& ?; k1 w8 g# k/ n3 e - break;
2 [4 y' n' z5 l9 C2 y: R9 F - }) A/ U9 A' {6 M. j* k4 f
- szBuff[ret] = '\0';- P' M, }& ?9 Z4 ?. x- Z
- printf("RECV: '%s'\n", szBuff);
. J4 \4 Q7 @) [* n - if(strcmp(szBuff,"abc")==0){
7 ^1 \# Z( m- U% r2 ^ - memcpy(szBuff,"Send the correct string!",25);+ y% }* v, |; |5 U( c+ Z" U
- }
0 u6 j p3 C5 f. N2 ~ - else{
1 j. l7 S: W* k( G - memcpy(szBuff,"Send the wrong string!",23);* `6 f- L! [2 t
- }% A; w$ E5 T$ C! M4 t) f
- ret = send(sock, szBuff, strlen(szBuff), 0);
; t( Y) H* D1 N, c - if (ret == SOCKET_ERROR){
) G7 ^3 h# j; Q7 u* ~- g - printf("send() failed: %d\n", WSAGetLastError());
, E/ d3 ~/ U& ?& S" Y ]% U2 r - }/ Y- m) J5 s7 C3 b, S# \
- }
# [0 J3 q Z/ m8 @+ P0 _! U5 S: T - return 0;/ D( V& ^% j- A
- }; p0 Z/ Y/ k, G" _
8 K- A1 a' Z& l3 _- int main()
7 h2 y( |3 @2 i. q# s' R0 c1 M8 s - {; E( A+ A$ o3 R0 y$ u9 }
- WSADATA wsd;
2 |, G$ B) c; `7 D: }5 l - SOCKET sListen,
# u' c0 Y- n4 ?, F- \6 H - sClient; P3 U z. ]& \' v5 M: c
- int iAddrSize;
1 ?$ q! i+ o! k. A - HANDLE hThread;& @- p( F. j& B. s M/ y
- DWORD dwThreadId;) G* E# H$ l" K6 _4 l
- struct sockaddr_in local,
1 F; B4 G! o4 w - client;
% H! A- P5 f2 q) Q/ C: g - ( C3 p( b- M& Q8 n
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)2 a: E7 o3 s; j% M/ d# R M
- {
& X* C. D. t/ n W* } - printf("Failed to load Winsock!\n");, {6 o h- z$ t6 q
- return 1;
w4 {. k, G6 z) f - }, [1 L/ f0 \9 x. m8 ^
- // Create our listening socket; O- e$ J$ V6 x7 [
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);$ t& [' |4 D! j* G
- if (sListen == SOCKET_ERROR)
) T" A/ a* t- K - {5 b; N: L; Y1 a$ `) Z
- printf("socket() failed: %d\n", WSAGetLastError());
3 y% G: q2 r: {; m7 S, G A/ D0 n - return 1;! z6 o3 o% m: ^& }) F
- }! ]3 T8 B+ Z0 `6 D$ E7 Z9 e% V
- local.sin_addr.s_addr = htonl(INADDR_ANY);9 r Q4 X8 }- f! [
- local.sin_family = AF_INET;
5 G3 ?! b! I I - local.sin_port = htons(iPort);
+ b/ D" E% P, a h1 T) e+ D
; \+ [: Y3 W# q8 F* g5 ^- if (bind(sListen, (struct sockaddr *)&local,3 m' R4 Y. e( B
- sizeof(local)) == SOCKET_ERROR)
; |; \: Z5 T! M+ y" v t+ D - {
7 [0 \3 }2 i+ M3 g! a - printf("bind() failed: %d\n", WSAGetLastError());
: O- y$ Y' c5 l5 }# `8 d5 F - return 1;
. u; Q$ T: ~2 }! ~0 c - }! B) x8 q( j( G5 `
- listen(sListen, 8);5 \* J$ B: U- o- |2 y! L% E
- // In a continous loop, wait for incoming clients. Once one
2 u+ |& J; C7 J0 X - // is detected, create a thread and pass the handle off to it.
, f* F' R! P2 c - while (1)* a0 S% G" z) y% a, t& {4 P
- {7 y# `+ m4 E8 c- G; d4 u7 k( G
- iAddrSize = sizeof(client);. o0 X9 W& {9 K5 o
- sClient = accept(sListen, (struct sockaddr *)&client,
$ S4 ^3 p4 h# Q' x O - &iAddrSize);
4 O; J: O0 M3 z - if (sClient == INVALID_SOCKET)
& Q$ n9 I7 H3 A" G) ~# T3 {6 q - { , q& L+ a6 S8 @) l. K; p6 ]( t+ [# ^2 a
- printf("accept() failed: %d\n", WSAGetLastError());) u) W5 U- W5 g# R* R/ m! s1 V4 n
- break;
) ]4 z7 y* n& E, {- r, q - }2 Q: U/ l# k1 `. w4 P1 J
- printf("Accepted client: %s:%d\n",4 U C; W5 X! ~* f
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));
) g" l5 ?. S. H- O
7 N$ N' _4 w& u3 @- hThread = CreateThread(NULL, 0, ClientThread,' k3 B& K2 j9 J; y% y. O
- (LPVOID)sClient, 0, &dwThreadId);) n f* t$ e6 v" U' {' I
- if (hThread == NULL)
$ [0 I2 y* a0 Q" f - {
% s N% y& Q; E9 w1 \, L - printf("CreateThread() failed: %d\n", GetLastError());" P. A: \$ ] o5 d. G
- break;
0 r: T0 b/ P: `& X - }
1 W) r# F& l( A K& y - CloseHandle(hThread);1 `& K1 k* c5 |- E9 k& S$ T
- }3 @5 B; C: p2 T8 e1 D9 Z9 q7 H
- closesocket(sListen);
F j8 b9 c; d% m9 U/ m' C* @ - ' ^0 s$ K7 g( Y# q, o7 a5 X0 }
- WSACleanup();: D7 E2 j1 X' p1 c' \% e0 h
- return 0;
2 a/ D) r6 X* E; F) U% U5 t/ M - }
复制代码
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