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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。4 ?8 U% w) |8 J* ^( Y
客户端程序:client.cpp
! H6 V+ y# x: O8 p8 u: a5 r. X- #include <winsock2.h>9 h- l! w0 s/ _! \$ m
- #include <stdio.h>
. O J5 v$ E! [/ I4 j8 u) q/ g. } - #include <stdlib.h>
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- #define DEFAULT_PORT 5150
5 f, k1 U4 a1 N4 t1 F9 _* T+ G - #define DEFAULT_BUFFER 2048
; Z8 V* Y3 B$ d6 U* E# | - 7 P; s. T$ e$ J. J# a8 B" }
- char szServer[128],2 |& T5 A) a$ @( W* F1 W
- szMessage[1024];
3 _! ]( Y& q$ ]. n6 i - int iPort = DEFAULT_PORT;
8 ^/ I: p- [1 l. O% @ - 3 G/ [, M/ B$ S8 w) B
- int main()
|. R3 G! l# c2 Y - {4 Y( f# }& W/ T# q# ^) b
- WSADATA wsd;
+ h# L9 t) B) g - SOCKET sClient;9 m2 z: N3 }1 w, {8 |
- char szBuffer[DEFAULT_BUFFER];
1 h7 Y' g6 B) j - int ret;# ]# c. x7 v% Y9 `9 Y( A
- struct sockaddr_in server;0 a, \5 F( [. J6 ?
- struct hostent *host = NULL;
% f; Q" x; W4 X0 i9 } - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)8 m) o( M. n8 p- M
- {# u$ x- G, T' A; F
- printf("Failed to load Winsock library!\n");
0 a" ?3 q# J& v' L# [) w( d: L2 Z - return 1;& q1 h. ~+ ^' |9 z
- }
0 k \) K; K$ y2 R- J - printf("Enter a string to send to server:\n");: x" x B0 P$ y1 u5 j! I
- gets(szMessage);7 k9 d' T9 y6 K6 G0 X9 `8 l
- // Create the socket, and attempt to connect to the server2 R* Q+ E! d+ _ I9 y
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
7 A0 e T. @; q3 b" s( a) U - if (sClient == INVALID_SOCKET)
9 \3 |! V3 [( n: w: e2 @ - {
* N+ k+ J3 h3 ]3 c3 N - printf("socket() failed: %d\n", WSAGetLastError());
( g) V6 y% O0 t* K+ R7 h - return 1;- [% {8 S0 g1 R- u% A0 ]2 @
- }& }/ z$ E2 G& G5 Z* Q% o4 \) ]
- server.sin_family = AF_INET;; L6 E( ?5 Y9 I; n+ o$ r3 D* v
- server.sin_port = htons(iPort);: l- G9 e' \! }4 u
- server.sin_addr.s_addr = inet_addr("127.0.0.1");
0 ~: z/ ~9 N3 Q& w8 ^& W4 \ - + ?% [( o6 l, Y% @, y; `* u3 ^
- if (connect(sClient, (struct sockaddr *)&server,
. B. N# p1 U$ V+ o; d - sizeof(server)) == SOCKET_ERROR)" Q' F9 j" l I# g4 s4 j
- {
0 C& C( V2 o" m0 X* }- N - printf("connect() failed: %d\n", WSAGetLastError());
" u9 l+ X2 i9 m; h) K( X - return 1;
% x% H; j' U9 x/ {0 Y- T - }
3 I" d, @# E0 B; ?9 F* v0 p - // Send and receive data4 @+ F, N2 p, f7 Z3 t( T
- ret = send(sClient, szMessage, strlen(szMessage), 0);
0 O: f$ S! E/ |0 T$ x/ w+ u: W - if (ret == SOCKET_ERROR)$ w0 k7 l7 D, r- O" i3 {6 G
- {! W6 k9 D1 N) y
- printf("send() failed: %d\n", WSAGetLastError());% K& N; L2 Q1 F' Y! P7 h
- }% E& y: ~, d5 a2 U2 l" S
- else{3 Y( u# \3 m; y3 p
- printf("Send '%s' \n", szMessage);
* |5 ?) f V0 f# Q: w/ f6 ^ - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
r, l# f) @9 {8 A+ [* r4 E - if (ret == SOCKET_ERROR){
; j# [9 o* m$ O - printf("recv() failed: %d\n", WSAGetLastError());1 _- r) K5 K G) ^; e* `3 ^# R
- }
2 H( \1 z( k- ?" H* M - else{' ?0 T$ l; E, z% M
- szBuffer[ret] = '\0';
( _6 U" I9 s6 M- ~- y - printf("RECV: '%s'\n",szBuffer);" L) |% ?8 m, ^0 @) o. Z7 S
- }
# T- @" m- t8 K - }0 ?; M* \. H1 s6 V
- closesocket(sClient);) U: S1 p+ ?( d' I/ ]
- * w2 z( x E* p& @, \% h% G
- WSACleanup();7 R" `: ?9 T# z4 h
- return 0;
: N# b2 ~9 ?* w3 G6 ~# k+ p5 B+ ] - }
复制代码 服务器程序:server.cpp- V3 o1 O4 t ^" G$ j9 ~
- #include <winsock2.h>
+ V' h2 V# L1 s/ z: S" b - #include <stdio.h>: \& O% R5 u. U- ~8 D' }) i( R
- #include <stdlib.h>& n& M, \* T1 K; h; H U
& S! \# b+ e4 `- #define DEFAULT_PORT 5150
* M% w6 |0 V) I. c$ {% J' ` - #define DEFAULT_BUFFER 40960 V+ M" Z# j2 h& u& y
- 6 r6 Q* s+ S" ]) V7 b
- int iPort = DEFAULT_PORT;
" M3 K+ g. O1 q) o' z* z - char szAddress[128];; o- r% w2 Y/ Z; m
/ ^* ~) \9 {9 y; |6 q- DWORD WINAPI ClientThread(LPVOID lpParam)
; t* R5 q) |5 S( h - {8 Y% A; V* z3 x& E5 }, L
- SOCKET sock=(SOCKET)lpParam;& W5 e! a" D$ Q) i
- char szBuff[DEFAULT_BUFFER];
) R: @/ C0 d% k1 n+ g6 D% h - int ret;: B5 A. r' k. Z4 P* E: V) R: c4 u
- ( F! B1 b, u, a3 m# s
- while(1); x( n: S W* K& K2 h0 E) N
- {
. i3 m2 X+ d2 m$ { - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);, P }1 R3 G4 u
- if (ret == 0)7 v8 O" A7 z" Y- Y9 V; V( F
- break;
8 k a% y/ @+ R( U, W - else if (ret == SOCKET_ERROR)
" }5 j. a& s3 _% u$ u - {
y9 `' w: |) W- V2 y" E5 z& X - printf("recv() failed: %d\n", WSAGetLastError());+ ^, s3 t, O7 d2 i e7 b$ x
- break;- \" g" T7 u9 _8 b
- }
! y+ K2 L3 m; K6 m0 p) B( X - szBuff[ret] = '\0';
4 F0 k! ?, @/ F6 z- p1 U+ V+ ?' V - printf("RECV: '%s'\n", szBuff);
" j" z6 K# t; t. V - if(strcmp(szBuff,"abc")==0){
' Z b9 X2 }' s7 A - memcpy(szBuff,"Send the correct string!",25);
- e/ e8 F! `9 D - }
& _, E$ b# j* t - else{8 `& z Z8 g1 c1 r' W/ ?
- memcpy(szBuff,"Send the wrong string!",23);
4 p6 r3 }5 p# c - }2 Y9 [; u1 t1 e# ~. R- g
- ret = send(sock, szBuff, strlen(szBuff), 0);. Y- k2 |- O0 y, G$ F" v' O
- if (ret == SOCKET_ERROR){
& n: d4 w8 x- S! b) o5 T - printf("send() failed: %d\n", WSAGetLastError());1 d7 m" k* X2 @ }2 F6 ]1 {' M- m5 v
- }
0 i7 K0 c7 n1 l/ t/ Z0 i4 Q3 j0 T, O: H - }
1 H/ Q7 j' w( d3 d. _$ z - return 0;
3 H" `8 w9 i8 g - }2 o2 K# o5 K3 }6 z2 L
- 6 P6 X( R9 k/ W: v' p- H3 ]
- int main(), x! u+ I8 T1 u! H9 S, P% c, Q/ D1 u6 Z
- {
7 Y; X7 k4 Q+ c9 B" Q6 t$ n - WSADATA wsd;/ }, ?! N8 ], I/ X' c- [
- SOCKET sListen,: h# U. g% i* W$ `+ y/ H4 [
- sClient;# N! u* Z! i0 t$ X6 A
- int iAddrSize;6 {5 R5 N# F) j
- HANDLE hThread;$ J, }7 C: e& f) v5 Y2 y4 X% m) X
- DWORD dwThreadId;) e2 [; ^6 H2 j
- struct sockaddr_in local,
& ?. Q& O0 c2 ?0 {& c3 J( g" U - client;
7 a1 B: O( [+ q% }: c0 b6 k
5 [1 z1 l' {/ C9 J8 W- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
+ P j) m, ~ C7 _& t - {5 |' t7 M: \5 H/ h: I" |
- printf("Failed to load Winsock!\n");- n5 t2 n& f( ^: z) k
- return 1;
; y2 ^- M/ r0 l) t9 j. | - }( a3 G& b1 ^0 l. g; k0 d( h, n
- // Create our listening socket
! ?3 {0 s1 v7 e - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
& [: d! g" g$ \' H3 O {8 e - if (sListen == SOCKET_ERROR); v) m# i& z- x7 a! Y
- {- J& y4 z) U7 x) W* `
- printf("socket() failed: %d\n", WSAGetLastError());
+ \% n; M$ P2 y, ?$ T* Z5 r - return 1;5 r6 ?4 [4 m5 Z$ N0 C
- }
7 K: s: Y1 u+ }% j - local.sin_addr.s_addr = htonl(INADDR_ANY);7 ^& @) ^8 V& B, X8 `9 ~! ^: T
- local.sin_family = AF_INET;3 K$ r' |3 ? ~
- local.sin_port = htons(iPort);
# P. d) f" @0 B1 Y. g - & R9 e2 c" ~3 Y8 \
- if (bind(sListen, (struct sockaddr *)&local,
' S5 F& ~+ ?1 H3 R9 X: w - sizeof(local)) == SOCKET_ERROR)/ k$ o* Q1 j1 w# c, K) I/ C
- {
" Q5 E; L& L5 S' i4 [ - printf("bind() failed: %d\n", WSAGetLastError());9 f6 p4 K8 O. L5 d
- return 1;
! q$ X- O Y( P, e - }
3 s1 q" W& h9 K- T* k V - listen(sListen, 8);
% `1 A" y) P' Y5 h# P3 m - // In a continous loop, wait for incoming clients. Once one
" R" b* `: f! a: I - // is detected, create a thread and pass the handle off to it.
7 |: x6 N: B% _; W - while (1)
" r/ j9 ?. S0 q7 a! E. d - {
& p# T& r6 @, G" o - iAddrSize = sizeof(client);
& O( O/ M0 d8 @ - sClient = accept(sListen, (struct sockaddr *)&client,- q7 Q$ s1 O6 | C' f
- &iAddrSize); - [/ o$ w4 N9 u+ @/ d( t' h# a$ A3 y
- if (sClient == INVALID_SOCKET)1 J# n; b7 [3 X, B
- { 8 U; _$ |& b/ D8 s7 o! s
- printf("accept() failed: %d\n", WSAGetLastError());
( X! h- D2 ?0 ], o+ \ g+ g Y - break;
& k& @3 a' ], O - }; U$ d2 A, f7 x2 \
- printf("Accepted client: %s:%d\n",
4 {3 B% s Q8 u. W - inet_ntoa(client.sin_addr), ntohs(client.sin_port));
2 A& [$ g; F6 T% a9 Q9 Q - E8 @9 q: O Q; G. y8 N a; V
- hThread = CreateThread(NULL, 0, ClientThread,0 j9 d* B, ^: |
- (LPVOID)sClient, 0, &dwThreadId);
8 x2 r/ V! s" x. I# W - if (hThread == NULL): H4 l$ L) e( K
- {
+ f `/ e# ^7 b* J j* i6 m, | - printf("CreateThread() failed: %d\n", GetLastError());
( G: u7 `+ Z$ y - break;$ |* X% P' e5 B% d# a
- }1 I! N6 Y- U! k& `
- CloseHandle(hThread);7 R R/ {: B/ N/ ]
- }
' @/ @ W0 b3 @2 f - closesocket(sListen);
: e7 L0 G% N3 I7 |4 M -
& N: P9 o2 h4 ^4 } - WSACleanup();
" \0 Y0 `' |( W - return 0;8 S! P; `2 _* h. J
- }
复制代码
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