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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。
+ f4 n/ o; g/ S! ?" k客户端程序:client.cpp& R. X1 l: `0 M6 D8 q- m, `: g/ N
- #include <winsock2.h>
7 E) N, W5 r, m - #include <stdio.h>
8 ? F v, P+ r) X# h0 z+ P - #include <stdlib.h>" ?- K# n4 S7 i! F4 L
+ q$ ?* T& f& a' I7 j- #define DEFAULT_PORT 5150' [: g v, j% l6 X" ]$ L/ l
- #define DEFAULT_BUFFER 20484 Y0 ?0 M1 C0 I) z4 I7 o6 W, N9 e
/ b% U9 M' W$ b2 N! q/ B: j% a- char szServer[128],
# E/ r6 u( S6 j4 |( d - szMessage[1024];1 I4 b5 N: v7 f2 n: t
- int iPort = DEFAULT_PORT;1 E/ j/ ?1 {6 U' ~. r6 a4 y
- : H: T# x) C a' q/ ?
- int main()
2 G- d$ r% |& R" I - {5 E! b' `( q6 |
- WSADATA wsd;, ^ i9 A% D# j. E8 y$ V& `/ ~3 }$ _; l
- SOCKET sClient;- X; W9 F/ @" i
- char szBuffer[DEFAULT_BUFFER];/ F& S. Z. \ r, V' f7 N
- int ret;5 j& j% c8 f: Y1 k& [
- struct sockaddr_in server;: U' Q/ O) W& r7 c$ X! z& k
- struct hostent *host = NULL;) K4 V% b$ Y3 T$ v0 x
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)4 D5 y. @6 d' K* I
- {
: ?9 a8 O: q* A: l, t+ C5 } - printf("Failed to load Winsock library!\n");* c. c- |$ ], c) E1 E. T
- return 1;
) X" y7 Y7 v8 v9 l; H* K; I$ A - }
. Y( H3 m/ H7 v: n: I - printf("Enter a string to send to server:\n");
8 R" [+ c6 i6 p+ f N8 P" ~ - gets(szMessage);: ~* q I# Z& G7 Y
- // Create the socket, and attempt to connect to the server
& t' c& C6 N3 a" Y$ q - sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);, b$ K6 C+ k/ m; p0 c5 u' F
- if (sClient == INVALID_SOCKET)2 m! l9 a. C5 I/ q9 F* J# h
- {- j) |5 f5 Q9 H- H
- printf("socket() failed: %d\n", WSAGetLastError());/ g* C) q L9 u; B# d
- return 1;
: C9 G$ f3 T$ r9 d" U7 i - }
% |! O% s3 j Q( ?" D& r - server.sin_family = AF_INET;
* U# W, ^& i# M7 T - server.sin_port = htons(iPort);& h5 `: ` `9 e5 H; s
- server.sin_addr.s_addr = inet_addr("127.0.0.1");
/ x, y0 v& C$ Z9 c5 A- i/ O0 [
0 N `0 ?( E( T' l- if (connect(sClient, (struct sockaddr *)&server,: E |! C! q* j( H! N
- sizeof(server)) == SOCKET_ERROR)0 ^' `( `% x5 b) R& n4 I
- {
& ~" q, n: @ |% m - printf("connect() failed: %d\n", WSAGetLastError());
" a K; U0 g0 n - return 1;
0 B8 B5 A* X J0 {+ U5 F! t- u - }
% V# M$ b3 _% G$ T6 O9 L! G - // Send and receive data* `+ w$ q! T& E
- ret = send(sClient, szMessage, strlen(szMessage), 0);$ i- o% Q9 }' ]* v
- if (ret == SOCKET_ERROR)
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- printf("send() failed: %d\n", WSAGetLastError());
6 R+ Q; z& P% ~* ?2 A - }
8 N3 \' p5 i2 A8 D+ y: n/ u - else{8 U& t/ t7 c3 \/ X
- printf("Send '%s' \n", szMessage);- t" t$ n. u# K# @8 G7 |
- ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);) u1 {4 b& D7 `# \& I
- if (ret == SOCKET_ERROR){
& r* T+ _/ W) p2 I# N4 s - printf("recv() failed: %d\n", WSAGetLastError());
# p! l6 g* D- \+ f$ c - }( x8 g) n& ~8 r9 V: Z* d9 ~
- else{
2 }% @$ V" P+ ?5 `! p8 F2 W - szBuffer[ret] = '\0';
: S; n# p# L7 W6 c' B4 g K - printf("RECV: '%s'\n",szBuffer);
$ F% b1 z* M, N% m' f; W( N6 S/ A - }0 W& U1 Y! W; L9 }3 _" w0 A
- }* B' ]- l1 \5 f4 L/ V. ^
- closesocket(sClient);; \) t. k) e. o& M
- - q5 A$ Z, f) E6 D% S) t
- WSACleanup();4 [0 w9 h# o) S/ S8 ^2 N& [
- return 0;3 t, c U3 Q9 f3 V
- }
复制代码 服务器程序:server.cpp z7 q$ I) r3 |' S1 ]/ b% C* @% i* _
- #include <winsock2.h>' o- p# }. s: v' @& w
- #include <stdio.h>( `8 }) I1 s7 N6 B8 V
- #include <stdlib.h>9 R3 r; o6 r! C4 g! q
& U# |- K) i; {! J: a/ b2 P- #define DEFAULT_PORT 5150
4 H; [# h3 X& N3 ` d4 q - #define DEFAULT_BUFFER 4096' W3 d: S. t" v$ \ @: g* h
, n& u3 r& E$ I1 |9 E- int iPort = DEFAULT_PORT;
+ ^$ M- S. d- ~3 N; w; c- f+ ~ - char szAddress[128];' |" ?. E( M: k% E+ T- y
6 _0 d5 s0 R- d: ~% r- DWORD WINAPI ClientThread(LPVOID lpParam)3 A& g7 C/ d2 ^2 k6 p6 g. d& m
- {5 i2 j7 {) N6 V- b* Z* J
- SOCKET sock=(SOCKET)lpParam;
+ B2 T- ?3 H7 h9 ^ - char szBuff[DEFAULT_BUFFER];) f% W4 d3 G3 Y7 c
- int ret;
' K5 a$ t3 o9 a) @# _$ i
8 r) @7 E* r- B- while(1)6 f5 \# I& J9 s
- {- k! C0 G2 s: k. Q0 c: g; W+ [
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
& J1 Q# X0 r+ w( ?4 U3 l, J5 U# T, M - if (ret == 0)* ]5 s7 @9 S6 l6 Y- @% f: r" ]1 v
- break;
( B; C$ p7 l2 V, C2 R - else if (ret == SOCKET_ERROR)
" J4 u u4 J5 Z& D2 N! u7 d' J - { {" A/ g: k% X) ], D& C+ |9 D: c9 Y
- printf("recv() failed: %d\n", WSAGetLastError());
* q4 N- U. I3 V. G. E" v* t: c - break;
L2 O z2 `7 o, `7 o1 d. F4 ` - }% K$ Q! n2 F% [% ]
- szBuff[ret] = '\0';" Y1 j. P8 b! j% z$ e* R$ \
- printf("RECV: '%s'\n", szBuff);4 m6 z1 o0 W1 d+ B
- if(strcmp(szBuff,"abc")==0){" F7 C) U$ I# c4 V" v
- memcpy(szBuff,"Send the correct string!",25);% |# L) W d' F$ E$ l
- }; r0 p# Q M1 ]5 v& D( K
- else{3 y8 `; Y1 {* r; ^% E2 V5 l
- memcpy(szBuff,"Send the wrong string!",23);" x$ L& y. n! b! q7 X" r- S# a5 t: s- S
- }2 g q- f, A( y9 ^. @* J0 b( v
- ret = send(sock, szBuff, strlen(szBuff), 0);& J5 l+ z2 V8 a/ m% [" P
- if (ret == SOCKET_ERROR){% L0 k W" _- G' z- v( [6 e
- printf("send() failed: %d\n", WSAGetLastError());- l5 ` r* D1 G% R# [. E' c
- }' x& z+ d8 Y2 W: v! X
- }
6 g: t% h* K$ q9 z2 F - return 0;
6 j; z0 |: l2 J! J7 `6 a - }
4 u9 w. f& f9 R9 i0 w$ r* H3 P/ r
1 u# R3 m" P+ {' w- O5 x+ B% l- int main()
! j( b! q) J _" {+ |+ y( L5 }/ n7 n - {
, W; @2 O2 M. w& b - WSADATA wsd;, i& Y/ j H' D7 j, h9 G
- SOCKET sListen,
# t- m A0 Y9 K - sClient;2 [$ K9 \. R( Q* I+ [7 D- Z* n1 l
- int iAddrSize; D% j( J# G* L) a; t
- HANDLE hThread;
7 z! ^ D4 D- H! I$ i, h - DWORD dwThreadId;7 X6 Y- z( Q: L5 y
- struct sockaddr_in local, } u9 `, r* q4 I& y
- client;, L. i& E9 a: j5 w
- , D: h' h) |+ r6 G0 \8 y9 E
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)" m# b# Y" j. V9 {0 T& O
- { K/ I. g+ d( P2 M' O9 n
- printf("Failed to load Winsock!\n");
4 E2 q0 A; ]4 p - return 1;, y# i! j' m, ~: v7 A. V3 u) b
- }" f7 \- c8 r/ I6 |
- // Create our listening socket* H, G" F+ u( W' k
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
% _" g- t7 i3 q - if (sListen == SOCKET_ERROR)
: k- M( R. x" A; w' U4 k - {
+ B- o* E& k) x& S- d: O - printf("socket() failed: %d\n", WSAGetLastError());- J# i7 R* b5 o3 X3 D* _, j# k
- return 1;
; ~, j8 `: i0 v( H p2 C! ] - }
8 z- x( P% Q- E - local.sin_addr.s_addr = htonl(INADDR_ANY);
8 Z4 S% h& |! ?$ K2 S# H! n7 T+ d - local.sin_family = AF_INET;. J7 D: M5 h% ]4 c; ?; w
- local.sin_port = htons(iPort);
1 |+ {1 j" A' d+ w! }
8 j0 l+ d, ~& L" D- if (bind(sListen, (struct sockaddr *)&local,& U6 @7 F% i+ G1 D
- sizeof(local)) == SOCKET_ERROR)7 c8 b) I% |9 m& v" I/ F/ E, O
- {
# R; o7 F8 ^% L7 @ - printf("bind() failed: %d\n", WSAGetLastError());7 t* g! P$ b7 ^- Y" m9 y5 G
- return 1;
O1 E. x8 W- H# ^( e# E7 i - }
. F. q( D* ~* ]3 G - listen(sListen, 8);; d d8 D6 J: H# b6 k; X
- // In a continous loop, wait for incoming clients. Once one+ L: e1 v; q/ D: \# X$ K' i: u" @
- // is detected, create a thread and pass the handle off to it.* v/ Q- C" Q i; ?2 k
- while (1)( `* _8 S' g( j6 A
- {1 a p4 T6 `( \ c3 d
- iAddrSize = sizeof(client);
' P" [9 S9 `( }. O - sClient = accept(sListen, (struct sockaddr *)&client,
; h+ E7 r& |. D5 U0 D* Z* T% P - &iAddrSize); 5 m. k3 A2 w3 x; A% f5 L/ Y
- if (sClient == INVALID_SOCKET)
. b+ `! A4 s, z- `- L0 k' O - {
5 f$ ^; u. Q2 u - printf("accept() failed: %d\n", WSAGetLastError());# i' A& `6 V& S' Q" M
- break;8 q' _7 X) m. Z
- }
+ X4 u8 [% p" m7 `4 d - printf("Accepted client: %s:%d\n",* |+ O" r6 _- j7 [$ T# c
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));( H7 V1 J2 j5 P8 m* p+ p
W& @0 Y4 n0 H2 i/ q4 u' ~- hThread = CreateThread(NULL, 0, ClientThread,: `8 v; Q4 U. v: x' m
- (LPVOID)sClient, 0, &dwThreadId);
+ S: W1 g3 y4 W2 t2 p4 v' E W - if (hThread == NULL)2 d5 l4 J4 O) l8 |0 q& D& O2 t
- {
8 y5 B) g/ t7 |( i$ } - printf("CreateThread() failed: %d\n", GetLastError());; A! b+ D. a+ o
- break;" b4 L: {6 W# Y) n1 L2 D
- }
2 c1 j. a7 Y4 Y- T: }2 S - CloseHandle(hThread);
1 L/ X4 ?5 P2 B+ o: [# e3 p7 p - }
& W/ f6 F6 o9 X! G) j - closesocket(sListen);7 B" R9 T0 u: B! o3 w
-
6 s r+ f# D. n* p0 }9 \ - WSACleanup();, B1 G, u; R; t4 c' O# J; Z
- return 0;/ |6 U8 B7 W# A; v
- }
复制代码
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