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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。
; _# _8 k* J4 p3 H客户端程序:client.cpp I ]& C; r. q* }" Y" ~4 F
- #include <winsock2.h>
! o" P w0 h# W4 X% x$ B, @- l - #include <stdio.h>
+ D) S, a- N; a/ a( N2 Z - #include <stdlib.h>' V, L8 C0 R4 S+ }
- ( s* [9 E& w/ J j
- #define DEFAULT_PORT 5150
. R; o* e% c' a1 q4 I5 }; p; \& G - #define DEFAULT_BUFFER 2048/ N' S. G+ r+ x8 _$ J( Z
- 3 C' f: M }: F `
- char szServer[128],
. s; n0 i) Y6 S& C - szMessage[1024];# H: B' u; Z5 j" {- a+ T
- int iPort = DEFAULT_PORT;
) Q9 m5 f3 D' ` F1 ^
. d# e$ U% j) Q/ b# b' _- int main()9 Q0 o' Z8 `* _+ B& b
- {/ F4 U4 ?7 s0 d# G, c) I, \
- WSADATA wsd;
6 o' u% k3 N6 ]3 m+ V - SOCKET sClient;
! I" {( `1 T. L% h a( { - char szBuffer[DEFAULT_BUFFER];) y3 s; t+ L& W/ C# ^
- int ret;
1 B; j4 |, n2 n% _3 q - struct sockaddr_in server;
/ ~+ f% J* M1 H; h, } - struct hostent *host = NULL;
) }% v& A& @8 y- `( ^7 t2 M! L - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)1 D& [6 W- G9 y- M! _+ Q
- {9 o2 V$ q, G* i8 @7 M
- printf("Failed to load Winsock library!\n");0 }: C1 z# G* B0 y" e
- return 1;# A1 p( X9 @+ e8 _, g
- }
" e8 Y4 b) h, B& {: \ q - printf("Enter a string to send to server:\n");1 J" ^0 q. u" l
- gets(szMessage);
( v0 j! T- D' f& \5 f" l1 @4 d$ ] - // Create the socket, and attempt to connect to the server
$ P) s; Q% W F& `( e' c6 K. G - sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
& {& g, [0 l# D9 | - if (sClient == INVALID_SOCKET)
% E+ ~3 L+ z; { - {
* X# L$ L8 }9 N; z4 Y& u$ @# I - printf("socket() failed: %d\n", WSAGetLastError());- E! t3 q; q6 J7 g8 e! u$ V
- return 1;
$ ?* Y5 M& G$ U4 {2 v+ W% r8 U+ W - }
" z7 H0 o+ L# a2 v, G1 I - server.sin_family = AF_INET;7 l! u+ W% b7 @( d1 J* v0 g
- server.sin_port = htons(iPort);# t. s4 X1 U5 @
- server.sin_addr.s_addr = inet_addr("127.0.0.1");
9 q7 m* M9 W6 h' O
# [8 @' l$ F, e' } S- v- if (connect(sClient, (struct sockaddr *)&server,$ \' t n6 g& u1 {2 S, g0 N$ P
- sizeof(server)) == SOCKET_ERROR)/ H# r& A( G/ S# g8 }# P
- {
7 A& ~: R/ I; l" p7 m' [+ w. A - printf("connect() failed: %d\n", WSAGetLastError());
) f) Z& |7 L$ x9 ] | - return 1;% u8 h+ A3 W! I0 t6 U
- }
( B) @0 V4 _6 u% C& I1 S" v - // Send and receive data
9 i- p! Y: t! l9 z' y% j3 G% O8 q - ret = send(sClient, szMessage, strlen(szMessage), 0);# k! |7 z2 d9 Y5 g, l$ v' S+ A1 l4 c
- if (ret == SOCKET_ERROR)
) c9 n' Z" q) _& F - {
* i& d- c% L8 x - printf("send() failed: %d\n", WSAGetLastError());
8 L. W& {% W0 b" B - }+ x' \& T" ?( a3 {! A: E
- else{
4 B# a! M) F7 L: b - printf("Send '%s' \n", szMessage);6 c2 }$ u# b' Z/ G9 N1 J
- ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);2 v/ J: S/ [ V; Q* u" a/ W
- if (ret == SOCKET_ERROR){6 F6 [0 N/ u' o. X" c, o" Z
- printf("recv() failed: %d\n", WSAGetLastError());$ _$ X! ]) `% o6 I/ z; H
- }' t4 o3 o: M% X
- else{3 x2 u5 K- `6 y$ I! j
- szBuffer[ret] = '\0'; r# e# N0 U4 P$ X
- printf("RECV: '%s'\n",szBuffer);7 C. b" `& ~9 @
- }
4 V: U) i& V1 s5 H- f& k, e2 W: Z: _- ] - }3 }' h. Q+ o2 t' ?
- closesocket(sClient);$ v+ j& U! M# X: R: z0 }) v! p5 K
8 ^: e9 Z9 Q- u6 n- WSACleanup();( O6 d4 k. }. b- s0 `; m
- return 0;
+ ]. G8 K& H, ^' \6 \ W - }
复制代码 服务器程序:server.cpp
s2 ]$ a- \! }" v+ @- #include <winsock2.h>! I4 q. D) J( V
- #include <stdio.h>% u+ A+ o* C) ?: D2 X4 W9 ~+ a& G' _& ^
- #include <stdlib.h>+ c# e+ b& i4 m# Q6 l( t. h
8 S& f% N6 R5 @* h/ @- #define DEFAULT_PORT 5150
( d! H2 k) h+ F1 u% f; v! G5 P1 k* e - #define DEFAULT_BUFFER 4096
' L" k' [4 L: i8 [5 O- F& t
: f' Q7 z( D- o* g& D J- int iPort = DEFAULT_PORT;7 U( R9 s7 k# [% f5 y4 V
- char szAddress[128];- }" a, K6 x6 r! ~$ `
: x/ d8 v" g: X y; O# _- DWORD WINAPI ClientThread(LPVOID lpParam) O- s, _$ f5 m. j
- {: c0 s$ U* x t9 W; i* k3 S, @
- SOCKET sock=(SOCKET)lpParam;+ Y$ l0 U' |% Y, A4 _
- char szBuff[DEFAULT_BUFFER];: L$ K; k$ s. |0 d3 T- A. I
- int ret;" A* n+ r' B% F k* M D# g
; V3 k. A- s% p. o6 U. W- while(1)
3 x1 n) X; g( U8 d! Y& B& y - {6 q2 G$ ~/ ?! }! ?2 N
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
3 ]; b) q! A/ M - if (ret == 0)
* C( z6 o, Y& ?/ ]+ n$ y - break;# ~8 G" y' M4 K, G
- else if (ret == SOCKET_ERROR)
1 A/ Y: ]! m$ H+ [- f2 K/ n - {1 @7 f# Z7 a! z1 w0 x
- printf("recv() failed: %d\n", WSAGetLastError());) m" v4 P4 U% g0 u& U3 v! X5 K
- break;
& Y/ a) [ }! \% I' k - }
; P1 J1 J% N3 v& F( z - szBuff[ret] = '\0';
2 i% O3 q" F0 H, K - printf("RECV: '%s'\n", szBuff);
: b1 R' Q- j, ^! L7 I - if(strcmp(szBuff,"abc")==0){
; j4 @# t1 @6 @: w& ? - memcpy(szBuff,"Send the correct string!",25);# N+ Y% L3 {0 V( z
- }9 ~. {$ G+ V9 I0 \9 x+ I2 S+ A, ? c
- else{
. u9 j( Z' K$ ^ - memcpy(szBuff,"Send the wrong string!",23);/ z8 b$ T6 o* F
- }; v ?) P& \. j8 u' S' r5 N
- ret = send(sock, szBuff, strlen(szBuff), 0);& n' p- T$ a* g8 n8 v* o
- if (ret == SOCKET_ERROR){
! I# I" K( B6 e* m - printf("send() failed: %d\n", WSAGetLastError());
2 `+ {& |# a/ u) L. H6 O' |- ^ - }
! @4 v# b( Z3 U' H7 Z t. u4 t - }5 A& b( G$ t* G$ l8 j
- return 0;" R+ v) M( |" S" T, Y" {
- }
2 b" {3 A3 f: P4 @( c - 5 }. l# T( o, p4 Q2 d- g
- int main()& E0 [& L! N l n. ^
- {
" W3 {: @$ Z, L$ P/ F2 d1 P) {) g - WSADATA wsd;
& l. z* J1 B( v' H$ W7 N - SOCKET sListen,
: E5 T- Z) B/ J4 d - sClient;8 `- n+ Z" L+ |$ [9 h
- int iAddrSize;9 R+ R, a# Y8 _/ U2 [! ~* j
- HANDLE hThread;
8 j c0 G) I5 U9 T7 k+ k) | - DWORD dwThreadId;
: R6 A0 f U, h1 O: S! J: w& H) ^ - struct sockaddr_in local,
4 F" X H/ C2 @: N( r/ M3 Z - client;
2 M6 q8 y& n4 C, g7 J
5 C U8 C4 S7 I6 g- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)8 w6 f! R1 X3 A2 N
- {9 F6 B( Z3 \+ @7 Y8 U+ N# C" d, A0 O
- printf("Failed to load Winsock!\n");% V$ e7 d; s$ R7 J a- m4 }
- return 1;
% f1 P, w0 ]/ q% S8 {( D - }! e5 q7 L2 b; l" U$ p& A
- // Create our listening socket
6 C3 q- }! L6 _7 d# G+ }. G* I - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);8 l0 M3 B8 x3 H: u& Z- \) E+ ^
- if (sListen == SOCKET_ERROR)+ n" e, d5 e0 i7 @1 D7 w7 j
- {& u% j5 U# t$ E- n( Q( q
- printf("socket() failed: %d\n", WSAGetLastError());
9 d- |- z" |) P. a - return 1;
. `+ u: n6 l$ _$ z- L5 A; x - }
. ?1 v8 w: S- [ - local.sin_addr.s_addr = htonl(INADDR_ANY);
5 P8 r" B4 z( K - local.sin_family = AF_INET;& C, x2 ~+ |9 L
- local.sin_port = htons(iPort);
9 b3 I( T6 i5 o6 [! s
( k: V/ V$ F. p% P* `. f- if (bind(sListen, (struct sockaddr *)&local,1 b8 t6 k, h- U8 o' t
- sizeof(local)) == SOCKET_ERROR)) C0 d0 z% n7 W
- {$ f! D0 `9 P- _ s* a1 R
- printf("bind() failed: %d\n", WSAGetLastError());) Z/ G: c- D' ~4 s
- return 1;
+ W p5 n: U* V+ Q( K w7 E - }
9 B0 k) l2 ?4 B! s; |* y# }( o, P5 z - listen(sListen, 8);/ n' X) p0 [3 r" G# H. Z$ L/ j
- // In a continous loop, wait for incoming clients. Once one0 t5 H$ { C" S9 X! M# ^0 H$ h# A, K
- // is detected, create a thread and pass the handle off to it.
, K T& i; k9 j" R - while (1)
( \: M2 n. P! D- { - {
- L0 f7 W# Z! z - iAddrSize = sizeof(client);* c& q# c8 Z. l: |$ i9 F# J
- sClient = accept(sListen, (struct sockaddr *)&client,
; N8 h! a( D9 y, V8 C' { - &iAddrSize);
8 n1 Y1 X, p R' k: l) ` - if (sClient == INVALID_SOCKET)
' v; m4 p$ X! t - {
, {' }. T S0 V% q8 {$ C Q - printf("accept() failed: %d\n", WSAGetLastError());* X# k: b4 a8 q) S6 }# s
- break;
$ V. \2 {+ J- ], t2 J0 k1 l - }
' Y1 K* J& B6 o5 N9 g- ]3 Y - printf("Accepted client: %s:%d\n",
$ x! O) F5 s' S9 d3 K9 R! H ~ - inet_ntoa(client.sin_addr), ntohs(client.sin_port));: L2 j# I1 S' z: T
0 f* D. U" ~. d$ x! u9 o- hThread = CreateThread(NULL, 0, ClientThread,7 H4 e# d2 M" _0 R+ ~$ l
- (LPVOID)sClient, 0, &dwThreadId);
5 _! p4 ^* U! l, N: t; \2 H5 C: t - if (hThread == NULL)
- o% I+ ?" R, y- g9 n6 B - {
# W- S; T' V. j, U" n$ Q - printf("CreateThread() failed: %d\n", GetLastError());
2 a" a0 H& K* F+ j U - break;
; ] t; x2 |4 f/ p - }
. G, \8 @# S- L5 M - CloseHandle(hThread);
# z7 y" \4 ~. P5 ` z - }9 @; F9 D8 |/ V* Q
- closesocket(sListen); F0 W x, T5 j
- / P6 J% F; E# \7 ^+ \4 J z* X
- WSACleanup();" S/ T+ ^; r; S& f Z1 ?
- return 0;
. m8 d0 u0 |% o7 P# N- B - }
复制代码
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