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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。
) r$ g1 x; Y$ C4 k0 x4 U6 z Y客户端程序:client.cpp7 x7 r( f- \$ v$ H! t4 V
- #include <winsock2.h>
% X5 A. A+ \' i: W* J v - #include <stdio.h>- S w8 `2 Z4 B2 b: T. a9 P/ L
- #include <stdlib.h># K+ l6 U1 A5 Z/ k7 z
- 8 L/ E; c7 H3 J1 U. n
- #define DEFAULT_PORT 5150% Q. f0 l- M7 A( {( i
- #define DEFAULT_BUFFER 2048
, J6 h4 l: \6 J8 E7 T* G" p
! D3 T Q& r1 W* z- char szServer[128],% v, |+ w$ j6 K1 [( O; _! D/ P
- szMessage[1024];
3 J [% p- q; J4 ]0 i - int iPort = DEFAULT_PORT;4 [( j6 X( b6 t+ U2 v; P7 H
8 h3 E9 C1 o/ r5 d6 f& h- int main(): \6 R+ @( [& K* I
- {) R9 s! \6 R. o! W3 F' Y, R
- WSADATA wsd;
2 T; |, O0 E6 A - SOCKET sClient;
4 a6 d- K" V1 u6 L+ l3 g3 [9 G - char szBuffer[DEFAULT_BUFFER];
, N- |- i% g2 N - int ret;# T. `8 b' C5 R4 C- R) v
- struct sockaddr_in server; q% r$ Z( _' F$ f; C
- struct hostent *host = NULL;6 F' I9 A( X% ~
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)0 {& {) C" Q, v& A' l
- {
6 [- C; x; ^8 T! P: a - printf("Failed to load Winsock library!\n");: i% F- l* q3 T" A0 R( m
- return 1;
. ]* v/ M8 h9 H) F! f I( |/ D - }
. Q/ x `6 ~% E- P: }+ K - printf("Enter a string to send to server:\n");8 @2 G: p7 D8 U( F( x; Y
- gets(szMessage);1 w0 P3 S' d/ ~/ J
- // Create the socket, and attempt to connect to the server% b. D( ?, s. J. t+ ]" d/ A8 N
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);( Q1 q& f4 I2 g& d
- if (sClient == INVALID_SOCKET)
% i U3 H; J' K) z' x- | - {
: ]$ A5 K- k0 J Z, F; l, I - printf("socket() failed: %d\n", WSAGetLastError());9 {* D @) ?. d* u/ x3 z' u5 Z- k
- return 1;6 z) I0 Z& N, T+ O! p" T) L
- }- Y1 w0 i; Y! b3 M8 g4 V* |
- server.sin_family = AF_INET;6 _* O2 D3 N" W$ C. u
- server.sin_port = htons(iPort);# P9 i: T6 {( y4 n1 s
- server.sin_addr.s_addr = inet_addr("127.0.0.1");
: W0 @7 Y9 M" e4 \1 t, D. p% c
( j; b& H+ l8 ?8 k- if (connect(sClient, (struct sockaddr *)&server,
4 v/ P$ u/ x( t* d - sizeof(server)) == SOCKET_ERROR)
: V5 v7 w5 u+ Q- g. X# g R( E - {
2 ~0 t8 ~. u0 V! i. Q- m - printf("connect() failed: %d\n", WSAGetLastError());4 p- H8 P9 @8 w; X9 F& U8 n9 P1 Q; T
- return 1;
3 S$ E( K; r6 I0 [, r6 T% H+ t2 ^ - }
0 ]4 B" o5 M% m. x v - // Send and receive data0 f/ i0 |* Q' D
- ret = send(sClient, szMessage, strlen(szMessage), 0); \/ S5 m. e& C6 s3 A `
- if (ret == SOCKET_ERROR)
; D& s2 `/ |4 t& J' O8 w - {2 Q: W- `+ U' P$ f$ j
- printf("send() failed: %d\n", WSAGetLastError());$ S- O& [' ?7 D6 c' J
- }9 f' f1 g, ]' h' w4 H5 V2 D
- else{2 \* A z: V8 Y
- printf("Send '%s' \n", szMessage);
7 w* T2 K& k4 ]: ^ N1 |6 N9 [ - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
4 _ }7 ?1 ^$ ]; t! ~# A' {! u - if (ret == SOCKET_ERROR){* d9 G3 n: S0 j# v3 K6 k
- printf("recv() failed: %d\n", WSAGetLastError());% T* Q3 q0 P: `' G: j" `: o, U
- }7 E/ m% a2 j+ e% V
- else{
! ^8 \, h' T6 @ - szBuffer[ret] = '\0';) g) l9 }7 G) ?% n" ~$ e& m
- printf("RECV: '%s'\n",szBuffer);2 j2 x [( t2 F0 k- h3 y
- }
. d% } s; K# b$ q& N* [7 T - }2 x( Z7 R8 J' I1 Q) w( d7 [
- closesocket(sClient);6 Z- U4 D; L$ D% g
- ' n9 m* K3 P2 c* v0 G' i- t- o( y
- WSACleanup();& l. R$ @ S8 ?; J, e: v9 v
- return 0;
; t# H( f8 n- A4 r& d& A0 ] - }
复制代码 服务器程序:server.cpp
- z6 N# r A. ]/ f$ w5 G! S- #include <winsock2.h>
. x6 ^$ P5 S% u9 Y. r: f - #include <stdio.h>
5 R, _! x4 x; s$ O( B# Q - #include <stdlib.h>$ I7 ?1 q5 e$ Z8 [- u8 T- p$ n
- $ ]4 R& I" a6 C1 C2 m) K* W
- #define DEFAULT_PORT 5150
5 G# t) c. V1 B6 O, P8 L$ C - #define DEFAULT_BUFFER 4096
; T% G7 W$ r, _9 K7 c - 6 P# T- G3 c4 E" G5 K+ J0 R
- int iPort = DEFAULT_PORT;
, x4 h9 u& h6 \; u/ S, p - char szAddress[128];
! E) h1 ?4 r+ [1 u" G R/ e
5 J; O4 f6 O* X: x/ ]3 G- DWORD WINAPI ClientThread(LPVOID lpParam)& ~8 ~* F: s! d9 T/ h8 Q3 o v% C
- {. @0 R# S" T8 l$ |: P. R, w+ |& s6 \
- SOCKET sock=(SOCKET)lpParam;
& A. q4 r! j. f) {: p - char szBuff[DEFAULT_BUFFER];, [. z# j: d* j8 ]. C. ~
- int ret;
- a2 w' F9 e( C- i, B$ } - 2 R7 v" U5 J. d+ {* K: e: M
- while(1)+ E# \( m5 C) j+ Y9 u
- {
3 L2 D5 f7 K) ?% Z" N - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
" W% i5 J; c& n! {/ w+ ^ - if (ret == 0)
/ p$ i( }) Q6 v# L - break;
, L; y% @0 N" r+ v8 d% b4 t - else if (ret == SOCKET_ERROR)
- ^4 R% I/ D5 H, J - {* S; H Y& `+ I
- printf("recv() failed: %d\n", WSAGetLastError());
9 B: ]% V9 f" ?8 h! @. ? - break;. F& ?; n: E" p$ E k* O: D
- }
5 V; |- |# |' ^: q7 L) B - szBuff[ret] = '\0';% o1 y- w. q6 o
- printf("RECV: '%s'\n", szBuff);
6 s D0 H, W6 t - if(strcmp(szBuff,"abc")==0){
/ ~3 Q! R7 }' a! s - memcpy(szBuff,"Send the correct string!",25);* X9 a# p% U. y) e% @2 F; \
- }% ^( V( C+ B+ T
- else{% g/ A& `; z1 p9 g v/ ^+ R7 I
- memcpy(szBuff,"Send the wrong string!",23);
; E* a2 I4 x! C' u8 }# ?% ^, q) O - }
) P% O% A9 }3 k1 } - ret = send(sock, szBuff, strlen(szBuff), 0);/ K( k0 K" j% L( ^
- if (ret == SOCKET_ERROR){ U; Y5 C" l4 p8 v; ~/ U- `' E% q
- printf("send() failed: %d\n", WSAGetLastError());
" p: q1 Z3 ]9 J A- u/ \- j - }% X+ @) F Z1 j8 g" q' v: |2 Q
- }
! n5 f) F! Y+ P, O( P2 G( \ - return 0;) G9 t% L$ U4 ]3 E3 Z
- }1 i+ x( e4 E3 \0 W* w
- 5 v/ I) Z, {+ G2 H+ O5 A7 b9 v
- int main()" b& u, q& ], d
- {9 q! n( C7 H7 m9 O: |
- WSADATA wsd;
$ T3 Y1 W# o+ Q' t% W" M e - SOCKET sListen,+ L# A, i" ?# k
- sClient;
8 B7 G. @3 i6 g# W6 x3 n4 \8 N - int iAddrSize;/ b0 e1 l, H5 B5 A8 t: z
- HANDLE hThread;
$ B e6 L: t: E% x+ b3 V ^ - DWORD dwThreadId;
. b" D2 \3 Z) k - struct sockaddr_in local,$ k0 y' z/ |) _+ g" h
- client;
$ h1 n2 G6 P" t* R( v1 `
9 R& G+ v N; z, I1 v% C- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0) K" R Z, N6 ^8 j$ l3 N
- {
( E6 K# h! @& ]% z, p3 y% L - printf("Failed to load Winsock!\n");! Y3 B/ u1 F/ R' H+ C5 M; }
- return 1;
, h3 R/ @- X: z7 `' \ - }- _* ?3 `5 T/ {/ B2 b
- // Create our listening socket
5 ~* h9 I9 h; _( Z3 b P. b; D - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);- K, Z# V4 y' T, Z2 n/ W. e
- if (sListen == SOCKET_ERROR)
1 e" F5 G4 v% e) b. i7 r2 L+ ?1 d - {# O# r+ H. l2 z/ U# T
- printf("socket() failed: %d\n", WSAGetLastError());% {7 B" t& B! y
- return 1;
3 f! X# |0 @3 N2 K! F. z3 B - }: O5 m4 h6 ]7 s: |2 S$ R- e
- local.sin_addr.s_addr = htonl(INADDR_ANY);
4 ~9 u# v Y q) I5 X. _: U; `: \# G - local.sin_family = AF_INET;5 Z! Z) y1 B" Y2 R
- local.sin_port = htons(iPort);0 O7 j Y4 i( y3 E) K" k% e
- " H B7 s: A, Y
- if (bind(sListen, (struct sockaddr *)&local,
! c, e$ m( |2 H) ?+ ?0 W - sizeof(local)) == SOCKET_ERROR)
# B' @6 \0 C, J5 W" @& q! } {; h - {
, v2 s9 @$ |, \+ O& @! n - printf("bind() failed: %d\n", WSAGetLastError());
% |8 @5 w/ k6 y# F$ ? - return 1;
7 E) e9 |( n) U3 S' N/ o - }! p: z* ~- ] S, t# f1 o/ i
- listen(sListen, 8);1 @: Z' H# Q$ n' V
- // In a continous loop, wait for incoming clients. Once one' i, _3 B8 |( d2 r( D$ _6 @6 o) {
- // is detected, create a thread and pass the handle off to it.$ l' J' g8 w) W7 y8 P- l4 I
- while (1)
$ p) x- ^. T: k: N - {1 M4 `3 Q m b# m4 u5 `3 q% S
- iAddrSize = sizeof(client);
0 c; ]. S' c3 F% ^$ y) J) Q$ I - sClient = accept(sListen, (struct sockaddr *)&client,! `% N2 v3 R8 N! u! K7 x! l
- &iAddrSize);
( C; Q) ]' C$ z - if (sClient == INVALID_SOCKET)* r% p; A4 D3 f) s
- { * p% Z" l6 T+ `% u% D2 R
- printf("accept() failed: %d\n", WSAGetLastError());
- z( O9 r" i" S; ]( U) V - break;! Z% O) i1 O2 s& G$ x
- }" b! c( b+ L1 Q- u6 R2 Z
- printf("Accepted client: %s:%d\n",
, l; f+ v. C; W. k. S" D1 ? - inet_ntoa(client.sin_addr), ntohs(client.sin_port));' O' [2 G* c) r8 W
6 o8 c1 ` u- d5 g( g% \ M4 Z# u- hThread = CreateThread(NULL, 0, ClientThread," q F, w9 u0 n5 a4 K3 T; c
- (LPVOID)sClient, 0, &dwThreadId);
* T1 O! T% c8 d - if (hThread == NULL)4 w( G/ v$ j* |* I* Y8 v' |9 e
- {
: r. y4 @8 P- D5 J - printf("CreateThread() failed: %d\n", GetLastError());
/ `8 w' i; v' F4 `0 d) | - break;: J3 @& B; P0 M& m
- }4 b5 K9 [0 | B' y: \+ {
- CloseHandle(hThread);+ d7 ?( ]" b9 ]
- }* x8 ?8 N+ Z+ x$ t6 I# n+ L
- closesocket(sListen);
3 h; n3 i* S/ Z# Y - 7 F! U9 S2 v' ?" f
- WSACleanup();
9 _# E5 L7 d3 r- q3 h8 n - return 0;$ o1 C {" X" s% j5 D
- }
复制代码
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