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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。
9 q Q) D1 m4 v2 E5 d客户端程序:client.cpp6 F$ P" C* P3 n, x* m& j3 c9 Z/ ~
- #include <winsock2.h>
5 ~% h1 c, u% S( X) P/ M: [2 ~3 | - #include <stdio.h>
) g. K5 g# g1 i( u. \9 @4 Z/ ~ - #include <stdlib.h>" Q9 s; \5 z/ ^: M" P" m5 x& B
- - w6 ?3 F( J! ^
- #define DEFAULT_PORT 5150% Z% W1 O) _* f
- #define DEFAULT_BUFFER 20487 \$ U7 M/ i1 ~/ x
- - h5 V$ ?% u" m6 a& ^$ M8 a
- char szServer[128],
+ o; b* w. b3 f4 b+ h& v C, E' k - szMessage[1024];
, ^: r. y. O% o5 i2 {) } - int iPort = DEFAULT_PORT; \: N. s1 j5 k0 {
6 P* ]5 ~6 m I2 X" B- int main()
5 M' Q' G4 A) ~# c* J ~! i - {, T/ y* } T/ z! ~1 ?0 _$ y3 L! J
- WSADATA wsd;
" U$ r( l; f/ r6 A - SOCKET sClient;5 t( I) v) K: |1 j6 `- `
- char szBuffer[DEFAULT_BUFFER];
: j/ x5 G1 n5 \, ?4 n: U: o4 L/ x - int ret;
- x9 C8 I4 ?; {! @* {$ x9 a7 h - struct sockaddr_in server;
; s5 `- l# e+ |; C9 L y - struct hostent *host = NULL;
, O- l( ~1 E$ n' z+ R+ h- D - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
! F& V/ M+ Q! M7 W - {! }3 j/ P) e0 |- n' J3 h; ~3 }
- printf("Failed to load Winsock library!\n");2 ?7 Q4 u/ m* b4 @4 ]5 v) u
- return 1;
( Q( E2 S: Q: I4 G/ I - }
J% ], @9 g3 ~' d: Z - printf("Enter a string to send to server:\n");
' k+ k) @7 o: P" | - gets(szMessage);( d( j% b; M/ U; X) b5 B: n; B( ~' w
- // Create the socket, and attempt to connect to the server
: k9 w' M! v/ ]: q6 g - sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);% ^: D1 ]: q a6 b0 a
- if (sClient == INVALID_SOCKET)# H2 ?- t. p! ^; I3 ]2 @# l- Q
- {2 Q! G* |; M+ ?! @- y* W: F
- printf("socket() failed: %d\n", WSAGetLastError());1 F: j/ t) \) g2 ]! s
- return 1;
1 ? e! P9 N8 m0 T: S G( ?3 O - }& v' w ]1 W: Z, |4 k
- server.sin_family = AF_INET;/ s0 ^) K7 q9 g. H3 Q
- server.sin_port = htons(iPort);
; }. ^. Q& n+ K K# m4 n6 a- R/ e - server.sin_addr.s_addr = inet_addr("127.0.0.1");
! |# m$ A: K! q. q \ - / J6 m' X. U9 f8 g- X
- if (connect(sClient, (struct sockaddr *)&server,$ A7 c# X6 d* B* j
- sizeof(server)) == SOCKET_ERROR)
5 ^% |% E% t& [ - {" g+ y* `" a$ W4 U' t
- printf("connect() failed: %d\n", WSAGetLastError());
) k! W) Z; Y% m2 H* [: N - return 1;) c( B0 T) b. p
- }# E. R, _4 E9 O; E$ P9 k8 V8 O2 D4 v
- // Send and receive data7 K& H6 H7 A+ u; F% m# P
- ret = send(sClient, szMessage, strlen(szMessage), 0);
* ]. Y# J: B; y! M - if (ret == SOCKET_ERROR)2 x( Q( Z$ x7 I) _( C" v3 p6 }
- {
: e8 u, i. t, \5 N6 z4 J. t - printf("send() failed: %d\n", WSAGetLastError());
* l4 \/ _7 G9 G, K) j - }
/ C% A) E, }+ L1 o - else{8 ~& {! F/ }8 F; f: k. Y% a
- printf("Send '%s' \n", szMessage);/ C1 U) y2 J* K2 L& ]3 b5 N- c- b3 Q
- ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);' I2 u, N+ ^4 L) h) z3 ^; G
- if (ret == SOCKET_ERROR){
: q7 R9 n( Z; N2 Z1 \6 c - printf("recv() failed: %d\n", WSAGetLastError());
3 U% i! }+ h+ p) ~7 w& k9 f - }1 {8 b& n( [( R) r' S& d1 d
- else{
# k; ]3 A: F8 q/ }; U4 T: g" C - szBuffer[ret] = '\0';* {# p4 v; S9 n$ I
- printf("RECV: '%s'\n",szBuffer);7 J1 u( s# A4 D! d' ? [* v$ s
- }: [9 ?8 a n0 b( Q. ~0 Y
- }7 ]5 @0 O4 c# ^$ I8 R9 r
- closesocket(sClient);0 I; @& _. A" W2 E& _* @% O! |
3 j) Z2 G3 b& D- b& \" X- WSACleanup();
" A% l( o8 y1 X1 | - return 0;
( e/ B: q d, c# _7 c: E- _! i - }
复制代码 服务器程序:server.cpp
. {, V0 a5 N/ i# r% v- #include <winsock2.h>
4 L9 E# g" y% O2 [, K - #include <stdio.h>+ J* y3 q. W' I# V# O/ f
- #include <stdlib.h>' b [, U9 @; @+ b3 Q. M8 W
- ( J! o% ?. {) A& O$ Z, y% L! [* w7 |
- #define DEFAULT_PORT 5150
& w$ t. J; f- S$ t - #define DEFAULT_BUFFER 4096
( T8 D N8 M A' h' k - 3 r3 a, K+ D, s9 V) a7 l
- int iPort = DEFAULT_PORT;
7 O' t& \: Q7 }, B7 z% ^ - char szAddress[128];
9 B& f8 S. G3 ]; U/ M& P/ b8 N
* h. z: B& G& v- DWORD WINAPI ClientThread(LPVOID lpParam)
$ v5 W6 {" \3 N1 e9 f( ~# Y4 t, | - {$ u* o2 K; l+ n" `$ ~
- SOCKET sock=(SOCKET)lpParam;
5 Q! u; k0 h0 p; t2 Y2 K; q( N - char szBuff[DEFAULT_BUFFER];: ~9 e( J# W; e3 S+ {) n! w
- int ret;5 @+ ^* A8 b/ ~9 p
- 0 n- S f& S0 `/ f$ `
- while(1)
, U! Z+ E4 |& Q* g$ o" p - {! q/ W, |, k2 O- ]$ o- C
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
( f6 A* Z) F1 _ - if (ret == 0)0 W, _: d9 _- Y
- break;- d! p- |7 J Q# c5 E% u$ T. d# d& C* W
- else if (ret == SOCKET_ERROR)
+ R* {; l9 t1 K$ z - {
( I% A& i$ c$ k: r0 O! j: }" M9 i+ a - printf("recv() failed: %d\n", WSAGetLastError());
' n' r# ]$ B8 ]; `1 v! A - break;1 g; z- c1 Q" i+ `4 Z5 i
- }7 b/ Q- {+ i' `3 x- l8 R! Q9 `
- szBuff[ret] = '\0';; p" _5 h% y8 {* N# D# z
- printf("RECV: '%s'\n", szBuff);
( L. e/ I! d. d - if(strcmp(szBuff,"abc")==0){
( u* I6 ^# M" ]$ Z- } - memcpy(szBuff,"Send the correct string!",25);) A; d& [! @, d% v) P+ o9 g
- }6 {. G: S4 v2 @+ w0 n' b b
- else{
9 \! ? m1 G6 [* D) K+ p- M* [ - memcpy(szBuff,"Send the wrong string!",23);5 A. J( l+ m- I/ T
- }& x/ d, p* y1 \6 e" m
- ret = send(sock, szBuff, strlen(szBuff), 0);2 w8 P! ]. l! m' z2 c. m0 W
- if (ret == SOCKET_ERROR){
5 s% V% z o8 _. {$ i5 A - printf("send() failed: %d\n", WSAGetLastError());
+ P6 h6 N4 V6 W. }# j# k7 m - } a1 {% y3 M8 l+ [/ p4 S3 V
- }
1 n# e- \( n& Y' B" K& v6 k( R( U - return 0;
/ I5 s V) v7 C9 p/ b - }
5 j, x9 ^5 P; e4 R. k P1 E: C" Y - * j/ M8 ~5 b+ A, c
- int main(): J: T/ @8 n* z" F9 a
- {
9 w! s' L* L+ l1 F3 {; b - WSADATA wsd;
% n5 } V) `( d- t# G) F! T# c: [ - SOCKET sListen,
9 t2 r) Z$ ~: R; d) o - sClient;0 A0 l5 Z" u0 f8 B' J- q
- int iAddrSize;
; J' x- [# B' m: E3 Z l - HANDLE hThread;
$ ]0 M9 X( G8 \! i1 {" n4 u - DWORD dwThreadId;
( F# U; b1 a* d* B0 W - struct sockaddr_in local,
@" U* O/ ^3 [ - client;
% V1 n4 O$ w" k. `1 {+ Z0 n7 _ - / m; t" G9 f% E, K0 A' M
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)$ e$ q; I1 h2 K; y5 J
- {
) _4 H5 J6 k% |0 T - printf("Failed to load Winsock!\n");
6 v \' Z; ?% h' y - return 1;
6 l7 n% g4 ` Z - }
# X8 m# y# d' m# o6 x& @ - // Create our listening socket; E0 D' J( l* C2 Y0 H! a5 f
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
5 O" d0 m$ I) s& N - if (sListen == SOCKET_ERROR)! ?1 w+ Z, \4 y
- {1 h9 M& V& ]4 l
- printf("socket() failed: %d\n", WSAGetLastError());) d m: `1 w2 @8 Z4 [* p! p
- return 1;8 I; T9 ~' t% @" o
- }/ H" D6 x: x3 f, V" E0 b' ^+ a1 Z
- local.sin_addr.s_addr = htonl(INADDR_ANY);! n% R3 m8 i! B7 e& q- A
- local.sin_family = AF_INET;
! ~3 T+ T( y6 c/ R2 C& l( C: j - local.sin_port = htons(iPort);' ] w: h* k8 b
: F v2 E& I5 ^( z' I- if (bind(sListen, (struct sockaddr *)&local,/ U9 {. I) Q: [" {% j' P" |! A: X" r
- sizeof(local)) == SOCKET_ERROR)
9 n5 w6 k7 g H& ]2 n; ` - {) M1 ^# j' i, t1 i4 A
- printf("bind() failed: %d\n", WSAGetLastError());3 h+ A/ X% B7 W# X- a* h3 C
- return 1;
- P1 H1 R; P3 S8 U* o) \+ R' m) p" _ - }
: L1 \& x/ B' g1 t8 t* t, a - listen(sListen, 8);
: j4 {$ h: Y+ i; G8 j7 c - // In a continous loop, wait for incoming clients. Once one$ R( |6 q) }. x
- // is detected, create a thread and pass the handle off to it.
# I: K* E6 D& Q6 z6 a - while (1)
# G% L* ?- x% ~% v. \ - {! s* {# `: s4 F
- iAddrSize = sizeof(client);, w- M- P) x9 E
- sClient = accept(sListen, (struct sockaddr *)&client,
" [* H& l' m* x - &iAddrSize); [) k1 `' p" @- d1 A0 v3 I
- if (sClient == INVALID_SOCKET)
7 z3 l" J1 @2 M - {
5 k) Q* g( L4 u- A9 s' y - printf("accept() failed: %d\n", WSAGetLastError());, a) R" c" R4 m' N* W
- break;
5 [# j6 z p0 c3 e" Y+ V. } - }( b7 Q* L- i$ H( X2 j# s
- printf("Accepted client: %s:%d\n",$ S, H: n% k. @& ?& G9 ~+ C
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));
, \. A) k: z$ G! L: C - ( l1 \. L" l0 m$ ]! a
- hThread = CreateThread(NULL, 0, ClientThread,
: k9 @( X3 d) K1 Z' ] - (LPVOID)sClient, 0, &dwThreadId);: z3 R! P. c8 }. [3 m/ u2 t
- if (hThread == NULL)
6 M( }* Y6 c1 L- K/ d) ^( ]3 L - {9 k0 |9 L- `6 G) o' n
- printf("CreateThread() failed: %d\n", GetLastError());
3 h; ~/ O* h5 j9 c - break;1 V( p0 ]1 e9 d8 G4 K
- }( b$ { ?) ~7 p- b9 u: g
- CloseHandle(hThread);2 O b' e5 |0 ?- E8 g; e$ I) f* {) _
- }
2 F. M& E, H7 K5 y% D - closesocket(sListen);
+ M! R% O, U, e0 c2 D - - ? M/ ]$ r9 A- X" n7 B
- WSACleanup();5 y# d6 g$ w/ N. ?
- return 0;& s5 E* l3 k6 A! I/ q' {
- }
复制代码
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