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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。7 Z; Y$ y& Q# o' B& n6 ]0 @( e S
客户端程序:client.cpp$ B2 A( f9 }% k V7 a: e6 f
- #include <winsock2.h>
4 r9 \# g1 w) T - #include <stdio.h>
, T& P2 h+ R+ p2 }* g! Y! A1 }6 V - #include <stdlib.h>
0 b$ W( Z M) L2 ]' ] - # J! |: a1 a c* {7 g; E- E2 k( O
- #define DEFAULT_PORT 5150. d% \5 W2 @7 _. L/ w$ w
- #define DEFAULT_BUFFER 2048
; r8 p: A. r& D" _# e+ k. J
% ^* W& o( l3 g$ D& p- char szServer[128],
" e X0 W- e, P! x2 E; {# Q. ?0 ?' [ - szMessage[1024];) z4 T4 Q+ e; U0 o( m
- int iPort = DEFAULT_PORT;
" ^% J/ v0 Z* K+ H
; _0 Z! k. z, Y9 ?- int main()) w s: E& T* S; g0 Q
- {
$ u. r0 o0 s/ {" z, g - WSADATA wsd;
$ {4 O$ n, D( h3 J - SOCKET sClient;0 z- C: I% j, @- w
- char szBuffer[DEFAULT_BUFFER];5 X7 A7 g8 l6 ~+ g2 J5 s
- int ret;
4 g. {( @, Q# P/ t6 N - struct sockaddr_in server;! M3 B0 b# S$ E) J# I5 T0 n. O
- struct hostent *host = NULL;
8 h) G. e/ q' ?% T7 K; c7 F# u8 K - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)' m+ K+ n) j. g0 }4 i
- {" M& V5 G( z8 a
- printf("Failed to load Winsock library!\n");( P, ^$ J. P8 O- p% Q! ~( L
- return 1;
. ?4 c3 A9 k% L) B- | - }' J( a7 y! E' {+ A: I+ c
- printf("Enter a string to send to server:\n");' U" B4 I$ |; u1 R8 s
- gets(szMessage);0 N4 j+ S1 A- w1 F
- // Create the socket, and attempt to connect to the server- m4 e; G. e0 T+ W; ~2 e
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
% W8 f! T) q/ U - if (sClient == INVALID_SOCKET)
( r4 r- s8 i# |% ~2 m - {
" k2 u2 E* r; M - printf("socket() failed: %d\n", WSAGetLastError());
6 A4 S- G& F% }6 J5 T0 j: P* t - return 1;
8 y. y! ]0 @2 B0 }% m* K - }
. R8 ]2 \4 ]0 J3 U$ Y3 n - server.sin_family = AF_INET;/ y8 d* p/ J& E+ L& y6 Z5 O
- server.sin_port = htons(iPort);9 k% N( l: l% \. [& f. W
- server.sin_addr.s_addr = inet_addr("127.0.0.1");
& Q' q* `( ~! Y - 5 t# g! @% D& D/ W
- if (connect(sClient, (struct sockaddr *)&server,
1 v4 b/ p2 m& E! K7 } - sizeof(server)) == SOCKET_ERROR)
7 c! ?: M% {4 Q8 s8 k$ O! o - {
# r+ h$ p+ u w* w) R1 o - printf("connect() failed: %d\n", WSAGetLastError());" }, k( {+ d; s, {5 `
- return 1;
g: C E+ U, m( i - }- d4 q2 \. U# {2 _
- // Send and receive data
4 \8 \0 Z; e0 z, w ]. [ - ret = send(sClient, szMessage, strlen(szMessage), 0);2 C _' k* O4 d1 C2 |: v
- if (ret == SOCKET_ERROR) e0 Z1 A) @$ R9 h7 j$ d0 L. Z
- {0 m9 u% B5 ?+ c7 C
- printf("send() failed: %d\n", WSAGetLastError());
2 x/ f! _0 d7 x - }
K# R* M6 r6 _8 c% ?6 q" l/ g - else{
3 A3 Q* X' D& l( o - printf("Send '%s' \n", szMessage);
- p; R/ x6 h4 M, S( S s8 | - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
9 y; v2 y0 t4 P; a9 n1 ] - if (ret == SOCKET_ERROR){$ g6 V5 m* A. a4 s. D; s
- printf("recv() failed: %d\n", WSAGetLastError());
1 P! k7 j/ h4 ^' H! _9 D - }
7 z7 D. T- d+ g7 U9 ^) A( f - else{
! a: F$ U# s% P! ?& l: E% u5 A. s - szBuffer[ret] = '\0';' s4 }& t5 N+ w8 Y* o
- printf("RECV: '%s'\n",szBuffer);
' y' i; M+ ~: I - }
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- closesocket(sClient);
: Q5 z% G+ N3 r# a5 W5 `" Y - 3 p5 ?2 Q2 Z2 Y2 K, ~5 U H
- WSACleanup();+ V4 Z* g2 s' y2 w" b+ D
- return 0;$ H/ s6 @2 h& b9 Y" E
- }
复制代码 服务器程序:server.cpp; c. W' s) M0 T+ V6 L+ r7 m/ o
- #include <winsock2.h>. A: }* Y9 q% d; ?8 i
- #include <stdio.h>
* ~ X! m9 m8 A7 t% y - #include <stdlib.h>
" p. y, z3 D% H( B, s# t4 } - 6 i( t( l! T$ n, h
- #define DEFAULT_PORT 5150
. b% b; {5 M' E+ y! J J9 Y - #define DEFAULT_BUFFER 4096: j9 i6 X; _3 T4 W1 {2 j2 W2 M
- ' x8 y O3 ~. M3 X6 Q
- int iPort = DEFAULT_PORT;
/ [. {" y5 O0 C, Q" o- W( T6 E: I; E - char szAddress[128];. i) q6 q% O" B' b6 r- b( Q
* ]6 ~+ h; H+ K) Q; R- DWORD WINAPI ClientThread(LPVOID lpParam)
$ z, r; J# w6 H4 H: v9 i9 j - {# b l% v/ g0 y9 r/ ^
- SOCKET sock=(SOCKET)lpParam;: ^4 s, p/ s' w0 _- \3 B7 _; I
- char szBuff[DEFAULT_BUFFER];
& A: q: [4 d4 q; ~ - int ret;# C" f! V+ |/ Q
- ! u& F) e+ |+ f2 j) A& X. p
- while(1)
$ f! O& ?( f% f: b/ J& c6 q - {
9 f3 d. V) z1 c8 r, n5 M( v. f' v - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
: [2 v! z3 ~% k0 s! W - if (ret == 0)
2 \7 J1 u4 k [ - break;
+ o( j+ m1 `' Y% V' k; s# l - else if (ret == SOCKET_ERROR)
8 K3 l, m t1 d7 ~9 \( t4 o - {5 }; L8 N' O/ s, u5 `
- printf("recv() failed: %d\n", WSAGetLastError());. Z8 \. b/ C; w. w, y
- break;* j( [( S( h- H' D: f
- }
1 T, l o; b) \9 i7 c$ _" X - szBuff[ret] = '\0';' ]% ~9 r( M2 B' H& ?
- printf("RECV: '%s'\n", szBuff);, \* i% `6 V9 c2 R6 s# }
- if(strcmp(szBuff,"abc")==0){
9 B a, n5 S+ c( O7 r - memcpy(szBuff,"Send the correct string!",25);4 k( e6 A: E# x. U7 [' C2 S5 }
- }: e$ ~ Z+ [) s7 T- h5 Q
- else{! Z% \9 y% R' t( s) G
- memcpy(szBuff,"Send the wrong string!",23); H& T; q/ p; t9 P7 j
- }
# |) _- o! C2 _ - ret = send(sock, szBuff, strlen(szBuff), 0);/ ^/ ?0 ~$ ?+ Q
- if (ret == SOCKET_ERROR){& U C4 z* z/ |
- printf("send() failed: %d\n", WSAGetLastError());5 @) {* z" t! x N5 v
- }
1 ~% y5 C, T8 r - }0 `. Q! a/ M/ m5 f6 N' U( L" Y
- return 0;+ |6 R1 V3 E0 N p3 n( a3 G3 T& v; g
- }+ L9 X% q1 M; z7 u4 G9 A8 g4 g
, F! \: y1 m+ R; a# x& t- int main()
5 D. }4 j. i# w( X0 G# W3 e0 ^ - {2 }8 Q6 m! M# U! g# g
- WSADATA wsd;
- z# p }$ ^ H! l6 S( O - SOCKET sListen,
8 z9 l! G5 o2 `0 X0 q - sClient;
9 @7 E! H9 k1 d3 o - int iAddrSize;! V4 W# {* {+ m5 E1 |
- HANDLE hThread;( l8 \, R5 G9 p, c
- DWORD dwThreadId;
/ p2 \- X; ]) R5 u- e3 f - struct sockaddr_in local,
! H1 u3 C1 W7 U( J* w2 ]4 M8 j - client;3 i) x" p# o7 j" [. r$ q: }% x
- # r! U$ k1 K( A' U" L) Y
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)6 o7 ]# o/ m# a1 A5 I& C
- {
! ~: c& }( @: `- ~/ \ - printf("Failed to load Winsock!\n");
6 _' |2 h8 w/ T- ]& d8 Z! d - return 1;) Q+ ?+ B" Z m! H# q" Q* o
- }( g. E2 U5 ^+ o& h2 {6 b* V- t
- // Create our listening socket: ^$ Q" v( W% e) U8 t
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);# o. }' Z2 [8 p8 E+ U
- if (sListen == SOCKET_ERROR)
* I C! p: P6 S4 I, o+ H: V - {7 u& S6 P& N) @8 _
- printf("socket() failed: %d\n", WSAGetLastError());) q) ^4 F/ I' e) O4 L$ m
- return 1;
$ x" ]$ ^6 M- u3 x. n* Z! u! j - }
/ }0 T- {; @1 M( l5 J - local.sin_addr.s_addr = htonl(INADDR_ANY);
+ u8 Y- a: Q9 `5 u2 ` - local.sin_family = AF_INET;0 U5 l. r# T/ |- w9 V' N
- local.sin_port = htons(iPort);. V# u1 P- B* {7 b
- 5 t6 S! `- o/ a; w% k
- if (bind(sListen, (struct sockaddr *)&local,
# v+ _; E/ ?( Q - sizeof(local)) == SOCKET_ERROR)% }: l* F! Y) H8 ^) C
- {
8 u! q8 G. Z6 I1 D; Z - printf("bind() failed: %d\n", WSAGetLastError());; G- D( k; J; M, H w
- return 1;
?2 u o* N9 i6 P! Y4 j - }
/ ^" E& s% d2 F% E# V1 w - listen(sListen, 8);
& e* Q8 l4 P0 j4 S - // In a continous loop, wait for incoming clients. Once one
7 n+ s6 ~* {. o2 s2 h/ h, W, m - // is detected, create a thread and pass the handle off to it.
@5 L/ @: s- ^5 ? j4 z - while (1)
) R$ }9 l6 `- n, p9 i: } - {
/ k+ u: j; n0 X# q, P6 _ - iAddrSize = sizeof(client);
- N/ |$ o* o5 N2 c% R - sClient = accept(sListen, (struct sockaddr *)&client,/ X0 ^: k3 [4 @! c: g1 V+ V, ~
- &iAddrSize); L. E: v" N7 I3 ?' ^4 ?
- if (sClient == INVALID_SOCKET)
* ^% r9 p8 H" D( {1 J0 B. | - {
' p8 v/ l6 b2 e7 i - printf("accept() failed: %d\n", WSAGetLastError());
# j5 ~. Y7 V4 I6 N1 S - break;8 J) Q7 J0 e! z3 Z/ ]+ o
- }! _. b& |9 s. M: \' |( `
- printf("Accepted client: %s:%d\n",
S F/ r( Z. x. Z" v; C - inet_ntoa(client.sin_addr), ntohs(client.sin_port));; ^' I$ I, d2 ~: M, ?( u% ?8 e
- ! q0 \+ i( `/ w& k/ z" |
- hThread = CreateThread(NULL, 0, ClientThread,# ^! [( \. c) V3 B
- (LPVOID)sClient, 0, &dwThreadId);2 g/ O8 t. h. d9 _+ e
- if (hThread == NULL)' R* q2 i4 |& k7 q
- {
8 v' I0 f$ H% [5 o - printf("CreateThread() failed: %d\n", GetLastError());
! [8 a; z/ k+ ?1 P1 K) E - break; l1 Z% K \, ~4 e0 N+ g
- }
1 L# A5 F+ Y; q - CloseHandle(hThread);
: x* e2 V" t5 V - }7 s, g, W. A! ^ \
- closesocket(sListen);
# {6 V% x! Z! R9 o k$ y -
* X$ y% Y+ U$ o7 I+ l ^ - WSACleanup();( d" s i" ~/ F+ ^. R
- return 0;/ q* ^2 g6 U$ p/ s
- }
复制代码 ! T% z5 ], l- T% y2 B
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