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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。0 O4 w2 A+ a) k6 B. ?- X
客户端程序:client.cpp8 t H* i' T6 w# h
- #include <winsock2.h>
0 b% t7 j) I+ V; X0 ~" B# e - #include <stdio.h>( d3 \0 x8 ?6 n, e) J8 u
- #include <stdlib.h>
. W2 k# Z* z1 R' j$ I3 y - + L$ k' V7 Z1 w, g0 V% B* _( T
- #define DEFAULT_PORT 5150
, Q Z6 F0 G8 O" J2 E- L0 k/ {# f - #define DEFAULT_BUFFER 2048& I. Z" z1 k6 D6 o" k
1 `+ I! v4 |" M7 Z' w* A5 [1 t- char szServer[128],
& |+ f5 i* x! \7 x( k - szMessage[1024]; J" {% Y8 @! H" Z
- int iPort = DEFAULT_PORT;
; r; w. L- c( L! g
/ @& r1 w W* m4 W# Z- H5 r- int main()
" y% P( p _# Q* M, }2 U - {
% X- J K) e5 w/ ^0 j - WSADATA wsd;
0 K" }4 L5 ?8 Z( w" S - SOCKET sClient;. `/ X0 X- k G' J- T* j' K& d
- char szBuffer[DEFAULT_BUFFER];
3 c0 O* h! f8 S - int ret;
% J# c; v; D- R" S2 W - struct sockaddr_in server;
7 L( y: N9 G8 H M2 x5 w - struct hostent *host = NULL;
7 a; b% s; ]8 _7 F - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)1 p' \; u% F' ?( g2 I
- {
! B" Z+ ] i6 m# k j$ } - printf("Failed to load Winsock library!\n");
* B. o( A9 D$ y; {1 T - return 1;+ x; N- |' X5 _) K' d9 j
- }
9 P& u5 D/ S) S7 `+ O4 O - printf("Enter a string to send to server:\n");5 ^! q; g! }2 \( y- G
- gets(szMessage);: |" r1 _3 X+ l0 X9 K* J
- // Create the socket, and attempt to connect to the server
2 D9 q+ a: Q! t: m( Y4 H$ S! ] - sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);0 d. l* m5 Y' u
- if (sClient == INVALID_SOCKET)! Q" G" o& g( v1 `3 O) X9 M' V
- {9 N) F& L1 C/ a! Q
- printf("socket() failed: %d\n", WSAGetLastError());
3 E+ g O! Y+ C! R$ B - return 1;
3 N! ^8 U4 ^+ _" N! i - }9 Z R4 [: |2 w& y# z, C! K8 ?, x. V
- server.sin_family = AF_INET;
. Q2 x" F. R+ m# R6 b, C - server.sin_port = htons(iPort);
9 x/ \1 T" P$ }: a `+ ]# p* |, w - server.sin_addr.s_addr = inet_addr("127.0.0.1");9 x% F3 \5 E8 b9 u
- P) U& m, g* l. @, ^2 W
- if (connect(sClient, (struct sockaddr *)&server,% Y( Q) j9 v% |: o& Z' \" y& [
- sizeof(server)) == SOCKET_ERROR)) Q& M" e; b7 b. _. `3 \. X
- {
8 g4 N8 K7 r1 n& p" g - printf("connect() failed: %d\n", WSAGetLastError());0 A, F! L! Q7 T( ~; N! S
- return 1;% y i% W4 K; f8 H) e8 x
- }6 i" y+ f7 z+ c
- // Send and receive data
! G! M" T3 h2 _* S" d1 t - ret = send(sClient, szMessage, strlen(szMessage), 0);
- j. S* ]- @7 E; a* t7 A9 \/ o - if (ret == SOCKET_ERROR)* @" f) `& j* ]1 k c: b! h
- {
8 w! Q& K0 E5 S - printf("send() failed: %d\n", WSAGetLastError());3 l3 q& t9 p0 Y S: a
- }/ r9 B" p& i3 m+ S! C
- else{
( ~# y0 }4 }% m# ?. K - printf("Send '%s' \n", szMessage);
* v, C! G$ ?% q1 X$ C - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);, l4 a2 e# p! [# [' ^8 d
- if (ret == SOCKET_ERROR){
4 y4 d' U1 |9 c! D% H0 S: w - printf("recv() failed: %d\n", WSAGetLastError());
3 Y$ l$ w$ V) i9 `. ]- C - }
2 o F F$ H9 p - else{
1 W$ A- V. \/ f2 E! d9 E' k A - szBuffer[ret] = '\0';; y, S! P5 J" x! T4 V+ D: H, s
- printf("RECV: '%s'\n",szBuffer);
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- }
3 {' U# {4 a, V - closesocket(sClient);
, C: h3 r3 r) E6 X; X' ~" A1 @ - & i! Z- L4 f' n- Z
- WSACleanup();
3 {* ?% X; l: a) X, S4 n - return 0;( K# @) z5 a* G+ \# R3 l" l: E
- }
复制代码 服务器程序:server.cpp# R+ q7 }- \4 C& F% x8 o- @
- #include <winsock2.h>
& {/ c0 o# ?$ X; x6 S - #include <stdio.h>7 P- L/ B7 w& ^7 b6 ^; X, n
- #include <stdlib.h>
9 m, s t1 S# m# n' |: B& m - " @7 O5 L0 v3 ^9 g, o8 [) g
- #define DEFAULT_PORT 5150: w; |% T U, _4 ~1 n4 C
- #define DEFAULT_BUFFER 4096: U# D; V" u. `. k0 \: [3 y
- j7 B Y) Q7 P" K6 p2 H
- int iPort = DEFAULT_PORT;
! K `: j; s& v - char szAddress[128];$ ^" G0 N; l) q0 v& m/ o: A( |
- 6 ~& T5 O6 Q: Q
- DWORD WINAPI ClientThread(LPVOID lpParam)+ w s9 \, f0 p" k' ^2 |/ z6 Q" a
- {
/ ?/ ]+ s! L+ m0 q1 u - SOCKET sock=(SOCKET)lpParam;0 V$ j: b) b- A( f( Z% B& Y
- char szBuff[DEFAULT_BUFFER];' ?& x7 z1 A$ a8 K& l$ S1 V; C
- int ret;
3 h# N0 E# r1 {/ n8 Z$ ]
/ K* x8 F/ l, x# b8 |- while(1), _4 g# Y: R; b. _( n( v
- {; B7 \# ~) [5 b8 ^/ M
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);9 ^$ D) O; u5 t9 a0 m. ^# }: \
- if (ret == 0)& \) i: t1 J( l9 @2 b
- break;& a! `3 b7 Q) j; I5 P- E7 o
- else if (ret == SOCKET_ERROR)" W' ?# f" ]+ F5 J
- {
; X9 q, w& V8 {) } - printf("recv() failed: %d\n", WSAGetLastError());1 ?6 m5 `: t( W9 ?6 s4 \
- break; a$ x: S0 L0 y8 D
- }. b7 T9 _% T& K a
- szBuff[ret] = '\0';
' W( }, V5 o2 u( J6 `) R( i - printf("RECV: '%s'\n", szBuff);
, }$ n+ _( k y: j( c3 c - if(strcmp(szBuff,"abc")==0){! _# q( Z8 |6 S9 |
- memcpy(szBuff,"Send the correct string!",25);
2 G8 v% d' W* w1 R" Z" i - }
# `* f/ {7 k2 W& v5 H% y/ ~5 P3 Y - else{
% a2 [0 V0 I2 I$ \$ e" T - memcpy(szBuff,"Send the wrong string!",23);8 a' \+ Y# R1 H" X$ G
- }
: ?& I- J4 c6 y - ret = send(sock, szBuff, strlen(szBuff), 0);6 m/ |9 L u, h! J3 N
- if (ret == SOCKET_ERROR){ m7 p. H# H }: f: J- o+ x
- printf("send() failed: %d\n", WSAGetLastError());
) Z. x( Q0 U5 a - }+ E$ ^) J! H2 t* S3 T4 X3 ?
- }2 ^7 Q3 I; x5 ?
- return 0;$ p( M E! b. ?0 N; }4 R- d0 x
- }! y- v5 z4 B' R& }8 h0 T* U
- ' T/ x- R0 n- U& ^8 X7 a4 t
- int main()
2 x+ ^: N2 S T; s - {6 \: |# ~/ a' [6 P
- WSADATA wsd;
; A; \5 |+ [7 x& I' s' B! o - SOCKET sListen,
" o# V* H1 U M6 C5 v# t - sClient;
8 \' E9 f% C& ]9 C* N" N4 _ - int iAddrSize;, s- t& z+ G' S7 a9 l- y
- HANDLE hThread;, J, i, j: w% Q' J9 y( e% h
- DWORD dwThreadId;6 U3 {6 m5 z4 B
- struct sockaddr_in local,+ |& I$ v5 Z% V2 s
- client;$ N( ]/ P L2 r Y( o; s$ q4 @
" q0 K2 l; {* F+ p$ X- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)6 r% z$ |0 `4 D/ ~' j
- {9 l' U$ `4 p2 ~7 W
- printf("Failed to load Winsock!\n");. I) ^$ c6 s& E1 t0 v5 J
- return 1;1 I& t) m! A) F! K2 L1 i; F
- }
6 y7 i% Q/ s( b - // Create our listening socket
, X" V f a x0 u* p1 T! P0 T2 C - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
. d) E% \' R" v4 `8 |3 t. v% s' G - if (sListen == SOCKET_ERROR)) y+ t( ]1 V& B4 a) i1 @0 D
- {) V" j8 S& U9 D0 C0 b" Z; K: u
- printf("socket() failed: %d\n", WSAGetLastError());
& c( C3 k2 H% V - return 1;
: Q( {- s/ }/ b, e - }2 Q4 `5 I, l& P
- local.sin_addr.s_addr = htonl(INADDR_ANY);0 ^. {" h. O6 U* T+ V
- local.sin_family = AF_INET;7 ~% S6 k K* d2 @* N; L
- local.sin_port = htons(iPort);
2 O& r5 A( r7 Y N: M
0 z A$ L' y T# R" B, s- if (bind(sListen, (struct sockaddr *)&local,; h) y7 b* |* E7 v8 F
- sizeof(local)) == SOCKET_ERROR)
0 P) c9 [1 S X9 D. A( D - {- h! Y. U' X% G# q
- printf("bind() failed: %d\n", WSAGetLastError());/ x2 _, i! W2 _* E
- return 1;
* i- I2 {1 u: Q. T - }
! S O, `( Q8 E - listen(sListen, 8);# {5 z/ j! ~- u, X
- // In a continous loop, wait for incoming clients. Once one/ t; S2 H' i% N9 m6 \
- // is detected, create a thread and pass the handle off to it.
$ p' M" ^( q: R! D7 B3 Z - while (1)
. v: D7 Z7 ?! P( A, w+ L0 w - {5 k$ I, b, u H3 \ [
- iAddrSize = sizeof(client);
$ |4 T3 [$ E& C1 r$ h - sClient = accept(sListen, (struct sockaddr *)&client,( J h U$ q$ v( Q4 a2 t4 `
- &iAddrSize); ' R3 t/ f( G9 y {
- if (sClient == INVALID_SOCKET)5 X; g* e& B* g( P: u
- { 0 _& r. s$ g W
- printf("accept() failed: %d\n", WSAGetLastError());/ A2 Q4 ?. _5 h, v: ?1 ^+ _% b
- break;% Z! E( Z' m7 M& j0 @" A# u
- }
* r& ]& E7 S6 m& F - printf("Accepted client: %s:%d\n", [4 X8 L3 K; E: f
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));
# J+ }! r; o# d- ?# [7 b - & h6 U, q! Z+ n
- hThread = CreateThread(NULL, 0, ClientThread,! u" I$ g- i$ M! q J- v
- (LPVOID)sClient, 0, &dwThreadId);2 W0 H2 e: S e( P# q V
- if (hThread == NULL)& b4 U# k$ e: X( E; s( |, x
- {; {+ O8 d G3 ]0 _
- printf("CreateThread() failed: %d\n", GetLastError());$ @$ _. V3 h+ u2 R4 f
- break;
) U4 h0 b j! m8 a- K - }0 Q3 _$ S2 @" {/ }9 E* n
- CloseHandle(hThread);" {+ r2 O# ]' X- |2 s
- }
6 w5 n, E- D$ c% I D - closesocket(sListen);0 C9 s# Z& \2 B7 C% ~
- 4 Q4 g& `& I! \2 A( L4 }
- WSACleanup();- i! \. R+ B' e8 ^1 P4 e
- return 0;
& r. F7 b' X0 s1 R5 G - }
复制代码 5 Q8 |0 F; g3 `6 U9 N" A2 U# @
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