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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。
) b, Y7 W7 ]8 Q( m客户端程序:client.cpp( _ @' P* f. P
- #include <winsock2.h>' p6 i' A/ Q: o* n8 P+ s4 j0 A
- #include <stdio.h>, p* e( ]# k o0 w% W
- #include <stdlib.h>
$ a# q! ^0 J' B1 Y
) M3 \+ I; Y3 I, o" K# C/ `8 Q- #define DEFAULT_PORT 5150
' X8 B$ e0 ^' N - #define DEFAULT_BUFFER 2048
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- char szServer[128],' [( W0 u! F+ w# M$ T1 Z
- szMessage[1024];
8 E; c& c+ D$ {; v0 E - int iPort = DEFAULT_PORT;0 q& P. k' j& Q! ?% w6 g m" K9 x
7 r/ a1 P2 O* V- o9 J; d5 _- int main()
4 e, _- I( v7 `; L - {3 n4 Q9 K/ c+ x3 } K0 }: L" x
- WSADATA wsd;
- y6 `- ~5 e5 x - SOCKET sClient;
9 ~1 l1 w1 F& [ - char szBuffer[DEFAULT_BUFFER];# F, j: h7 B2 X. R' x# I/ s! M
- int ret; e) @) R- l2 X) r4 x
- struct sockaddr_in server;
7 H0 H2 G) t. R8 { - struct hostent *host = NULL;3 H& u5 s6 W4 D/ k- K& A
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)$ z4 q' Q0 Q1 F* R* C8 D+ L
- {( z$ d; H! U+ @1 ?% O- [6 c0 @; h
- printf("Failed to load Winsock library!\n");
2 j* G% k+ `: P$ L( M" W% ~$ P) a - return 1;
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- printf("Enter a string to send to server:\n");
. w2 i5 D( }- i, A, G8 a9 ^% } - gets(szMessage);
" g5 \1 D, ?- o( e3 P% l7 _" G) E - // Create the socket, and attempt to connect to the server8 P8 |4 H6 z5 F7 H- C& b2 z m
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
8 Y2 l: \, M5 O! D - if (sClient == INVALID_SOCKET)
) c6 n/ }+ \, X1 v, | - {
% P8 q% }8 U9 f$ j2 q C. `5 J - printf("socket() failed: %d\n", WSAGetLastError());
# ?" u3 U; F8 d: u2 L3 b8 k - return 1;! y& G! Y6 C8 b6 L; h
- }
5 N% x: F) M: ] t3 \) d: K4 i - server.sin_family = AF_INET;
# k% ?* S6 T {* `! E; i8 o6 H - server.sin_port = htons(iPort);
% G( a) B9 m: X6 L& T; Y* B' [9 i5 j - server.sin_addr.s_addr = inet_addr("127.0.0.1"); ]. r" A# j! O# ^
- ) F, Y1 x2 m+ V6 M
- if (connect(sClient, (struct sockaddr *)&server,
2 B% d1 t& ?6 B9 c9 ` - sizeof(server)) == SOCKET_ERROR)
) }6 | X ~2 t$ R n - {
% h0 V8 J) s: N& W& C. a - printf("connect() failed: %d\n", WSAGetLastError());2 J. M0 i# }( e+ V" o' E4 c# A
- return 1;8 t& b ^0 r* ~& R
- }6 E. h7 Y" E( ]9 x
- // Send and receive data
6 R& U% W" g: Q3 a1 P/ Y& r - ret = send(sClient, szMessage, strlen(szMessage), 0);6 C" h! j: W- b! @
- if (ret == SOCKET_ERROR)3 a: W5 v3 h* D) _/ _, y
- {# a) u$ |8 O' U9 w" i4 l
- printf("send() failed: %d\n", WSAGetLastError());" e* h5 c9 n4 Q: z& ~- ]- M
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- else{ i2 ?" b& E! o- e9 X5 |& C' m @
- printf("Send '%s' \n", szMessage);1 Q% @% b! }$ X: B' B3 b3 W8 l
- ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
% h x+ q' E. @+ @ - if (ret == SOCKET_ERROR){7 m7 q8 h( ~$ Q/ E, D/ D
- printf("recv() failed: %d\n", WSAGetLastError());0 B3 [) [5 v, f+ \ x/ s, {
- }, b' d: i" f# o& B6 L; V9 m! U
- else{) p0 S. ~. w1 Q y* g4 V
- szBuffer[ret] = '\0';
- ]8 y' ?/ s1 O# M6 Q& | - printf("RECV: '%s'\n",szBuffer);7 k7 L, Q& v8 [& K7 m9 }4 K
- }
- V& z9 ?8 k9 U - }
! n' B4 i1 `( q% g/ ], Y3 J( J - closesocket(sClient);. B: G5 E: i4 \9 d! {7 B% ?: D# V9 I
- 2 d% _, k) Z& O! g0 h, h$ [% }
- WSACleanup();
- |" d5 w" k- d - return 0;
* _ V3 t1 I& {9 M - }
复制代码 服务器程序:server.cpp7 }9 w6 O* J2 W( \- ~
- #include <winsock2.h>
6 a" D" P5 z( S0 o- y6 N* W - #include <stdio.h>% C6 C6 @, Q# J) F5 Y
- #include <stdlib.h>- n. L3 |, v8 g2 \
- ; h m4 g9 y) l+ m
- #define DEFAULT_PORT 51503 j/ v7 B5 g1 q" _) ]# s$ Z [9 \
- #define DEFAULT_BUFFER 4096* z( f$ n- q) H' `; G9 V/ R
- 3 G4 X4 H' E0 M3 m
- int iPort = DEFAULT_PORT;/ M) O7 `8 `2 a/ R
- char szAddress[128];
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- DWORD WINAPI ClientThread(LPVOID lpParam)' ? ]/ }4 K+ \) {" c
- {5 N+ F' w z# W$ G" P; ~8 |
- SOCKET sock=(SOCKET)lpParam;
/ g2 |+ Z% q8 R. y7 v- A - char szBuff[DEFAULT_BUFFER];' {/ h7 a& ^- |0 f3 i& M
- int ret;* V" l' t+ r3 z7 Q* a. Z% b! x
" i; t# `$ O/ [" k7 m- while(1)
8 Z$ j. Q; L4 ^' k6 S' c$ C - {
, e1 t3 p4 `: _! ?0 r w - ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);8 I0 V" w2 x; ?6 V5 v; z6 Z, g2 c
- if (ret == 0). N% ?4 n1 ] P; l4 E# n
- break;! n5 G9 y- R9 I
- else if (ret == SOCKET_ERROR)8 t+ }+ R2 e, ?" @8 s* x8 _
- {
; w( E b- y2 \1 A& s - printf("recv() failed: %d\n", WSAGetLastError());1 M* H6 ]5 t+ a' y- b
- break;/ o8 N$ j' ?. K" q2 b" n$ J' C
- }
& x! }$ K" o- O5 U1 A - szBuff[ret] = '\0';8 F- c* w. F. Q( E" c
- printf("RECV: '%s'\n", szBuff);% s8 u: K. e/ W" p
- if(strcmp(szBuff,"abc")==0){
1 g6 I8 e; v9 l' ?& D, a" F - memcpy(szBuff,"Send the correct string!",25);* Z5 q/ \8 I; G7 K2 I2 P6 t& j
- }! y. Q V c# G1 [+ W+ W4 n, @8 v h
- else{
5 z3 W7 u& c N* R V - memcpy(szBuff,"Send the wrong string!",23);/ H+ k% @" F$ e% s! f
- }0 P2 T) X$ f; B8 ?- y/ M! F. U
- ret = send(sock, szBuff, strlen(szBuff), 0);
2 O- k% \0 I# ?; _$ W/ c0 Y1 \ - if (ret == SOCKET_ERROR){
# Z* S& a7 d: s5 v - printf("send() failed: %d\n", WSAGetLastError());$ t9 f# C+ B* l$ t5 N
- }
6 A; E5 F3 U1 Y! d - }
1 P4 p. X& }# S- U - return 0;3 ^ p1 z0 Y' [% g
- }# I S# y# I$ U- Z
! {/ Z% W7 o" D- int main()
8 ~2 H1 t& A! I7 V0 [* j - {, N, m Y* [& \) c9 `/ K9 e, ~2 n
- WSADATA wsd;
; J. R, {9 z j - SOCKET sListen,' `. [; ?0 t$ d! l$ K* T) p
- sClient;
* Y, X- G( r7 b - int iAddrSize;+ a4 F( i! D* @- _) G5 z. w; U
- HANDLE hThread;) f- ^* c7 b x- i3 C
- DWORD dwThreadId;* s l) n# F0 @8 E N) l
- struct sockaddr_in local,
* x0 m/ ?: J$ _6 H' x - client;
# U3 _4 q. Y9 c2 b( p* A - 2 l, B$ `+ T7 n5 X* \
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)# x% Z' n: a0 U" `
- {
! r6 b5 b' {1 v: J2 k9 r% T6 a4 A/ _ - printf("Failed to load Winsock!\n");4 q+ g( h+ Z% |* y( Y2 q t
- return 1;
# a+ P9 w; {$ I6 i% k/ F - }
9 I6 n) H: s$ Y8 a2 ~; u0 m. f - // Create our listening socket, X% }. _/ Z+ q8 U, Z7 j
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);: E, v0 ^& n9 y" b
- if (sListen == SOCKET_ERROR)2 ]0 z5 j, G* y& T
- {* E; H/ h9 n* H0 ?' @1 N i
- printf("socket() failed: %d\n", WSAGetLastError());
4 Q5 Q: |0 G5 \. I3 H - return 1;4 S# T3 {$ X( t5 z L9 }% A0 N) B* m
- }# i ?7 e9 P$ s+ y
- local.sin_addr.s_addr = htonl(INADDR_ANY);
2 t" ~* f4 |, [, Z2 c3 | - local.sin_family = AF_INET;
) u9 ?% j9 Y0 P - local.sin_port = htons(iPort);6 B2 m% u3 H% F3 c' N
4 _8 ~1 T5 G( @$ f' V- if (bind(sListen, (struct sockaddr *)&local,
. Y( t! e' Z9 B# O# a - sizeof(local)) == SOCKET_ERROR)/ o6 A" f' g- [% Y+ B$ e5 T
- {: e+ E# n8 H: C& T% ?/ O
- printf("bind() failed: %d\n", WSAGetLastError());
) Z4 j$ B5 n2 a' |+ X3 N8 x - return 1;* A3 L2 @; s* \3 M
- }
$ K$ e7 Z( d) L# U - listen(sListen, 8);
2 L w; L: R9 j( D4 q - // In a continous loop, wait for incoming clients. Once one
5 N" e# y4 ~" b' Q - // is detected, create a thread and pass the handle off to it.% j* z" g! H) |: n' S
- while (1)
. } U+ u( P W" f; p: D' } - {
1 R3 Z- J8 B' K) ?* X, p& M& E - iAddrSize = sizeof(client);5 i2 y! i/ G' P. R! t' |4 X9 _
- sClient = accept(sListen, (struct sockaddr *)&client,
- Z, f( l- S5 {& T" _ - &iAddrSize); $ d- X: c% j" C: x; l
- if (sClient == INVALID_SOCKET)
: j7 ]# V- ?& ~% h - {
( ^ q% W3 `9 Q6 N* H% s K - printf("accept() failed: %d\n", WSAGetLastError());
& y. s; @! r# F. c' V - break;
! Y! Y8 J0 p) U0 T; T3 U. Q - }* k& J' H' R0 }! d
- printf("Accepted client: %s:%d\n",
# ?; ~. q/ k# j/ Y# G - inet_ntoa(client.sin_addr), ntohs(client.sin_port));
6 e- E- v6 ]& m7 F" ~
7 C8 ]( E" o G6 g- hThread = CreateThread(NULL, 0, ClientThread,2 a: H7 x/ z! d8 S
- (LPVOID)sClient, 0, &dwThreadId);
8 Z) } x) u. c0 b - if (hThread == NULL)
^. s) l+ M0 m) e4 {8 ?4 y) b - {
; }0 q2 Y7 f3 u# D - printf("CreateThread() failed: %d\n", GetLastError());+ H; f; |) Q6 d5 e0 U
- break;
" z4 p7 m/ L: Z% z) [% Q - }
C: {4 @; t/ M) A$ B7 q - CloseHandle(hThread);
# I8 |0 F3 D0 L - }) O3 c: f& k2 E; g3 M5 t7 \. V9 l
- closesocket(sListen);
% t: z; V$ S% M, F - ) o6 ?) i3 B* E/ @: b
- WSACleanup();
% U! L5 R7 p3 s- p- b8 K; A - return 0;) p( _2 P- q, `
- }
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