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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。
( o7 ]5 |# x& k$ D& e+ y* T# z客户端程序:client.cpp1 _( K& {0 C; Z. r% d- @2 u
- #include <winsock2.h>
1 N: J& s) H% u# p# o - #include <stdio.h>
/ U2 Y! x) _9 [ W2 b# z: _; i - #include <stdlib.h>
' f- ~4 t; x: N) R; Y1 ^: ^ - 9 h& _9 D& w- G
- #define DEFAULT_PORT 5150
, e. e- s9 S* v3 A - #define DEFAULT_BUFFER 20482 z! x h6 u- T; C* w/ N5 S- a
C a( }: z6 u; {. e% B- char szServer[128],9 c# u# {, D G
- szMessage[1024];
- t0 v! k; r! S" E6 U+ z5 f - int iPort = DEFAULT_PORT;
' i! F3 W" Q, m9 Y: K( |
! y, a( ~9 o+ w( p- int main()0 ]) i9 x4 r Y6 ?4 ?: b; h
- {
. U/ s; F; Q, N6 A) ]5 l - WSADATA wsd;
" N5 m+ A( o! z) @8 i - SOCKET sClient;: `7 I/ R: k/ m2 j0 i$ u- x
- char szBuffer[DEFAULT_BUFFER];
7 Y$ \& ~! B/ y# l/ U - int ret; V- T- `8 S5 i6 a+ S: I5 N
- struct sockaddr_in server;+ ?- }9 C1 l1 X* M3 \
- struct hostent *host = NULL;
. ?. {, d0 d* u, u - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
: m W1 f1 m7 E$ g$ N - {
3 R2 e# p1 v9 H - printf("Failed to load Winsock library!\n");% l- `6 @& \. {( V8 t1 e8 C2 e
- return 1;. |) ]- U; F% ~
- }
& c$ v2 H+ o4 `( x - printf("Enter a string to send to server:\n");9 ]( B) Q1 @+ g2 D
- gets(szMessage);
! W; X% r! ^" U5 s+ a2 t9 c+ B - // Create the socket, and attempt to connect to the server1 F4 S2 d. d/ Z: F0 i# n
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
* `2 z1 s" l( n. k - if (sClient == INVALID_SOCKET): w9 b0 v' I( R* Q, t
- {" S. c* `2 U+ H( E! m
- printf("socket() failed: %d\n", WSAGetLastError());
+ H9 l" }* k, p5 v8 | - return 1;. T( W% M/ t' T6 O
- }, |3 C+ G; c% }; ~6 a$ u! j" ]
- server.sin_family = AF_INET;
, A) l# P+ p1 j# R' o$ r0 Z - server.sin_port = htons(iPort);
# L8 `: E1 \, O4 [ - server.sin_addr.s_addr = inet_addr("127.0.0.1");+ D1 C$ f. f) h8 X/ _* S+ N& Q3 N; T
- / q$ R7 Z- ]; z8 k9 Q( x
- if (connect(sClient, (struct sockaddr *)&server,/ x. a8 y! ?( |
- sizeof(server)) == SOCKET_ERROR)
3 i3 p9 z5 d5 i( F0 ` - {+ \' e" ~) H$ n+ k" h! ]# d
- printf("connect() failed: %d\n", WSAGetLastError());
/ @$ B* B+ n( Z9 t - return 1;
( f l# q. p, D# o2 k - }
8 C8 P! j: n5 `) k - // Send and receive data
: w7 c i3 R8 x u6 e( o# ~ - ret = send(sClient, szMessage, strlen(szMessage), 0);4 b; g2 M3 h' B: @+ E" ?
- if (ret == SOCKET_ERROR)& B2 F& }, k) F
- {: Y' ~0 z+ L7 [. \( ^, D9 I `/ ?( V
- printf("send() failed: %d\n", WSAGetLastError());
$ B" ?* B$ e1 w - }
* \7 b1 M! D( x$ G: t }" c - else{7 o) ?/ l" b% B
- printf("Send '%s' \n", szMessage);$ G1 h% ^. b- J3 J6 K7 k
- ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);' M( A$ b- Y# Q/ x
- if (ret == SOCKET_ERROR){: ~% p1 c( y7 ]1 Q1 P7 S
- printf("recv() failed: %d\n", WSAGetLastError());( Y8 Q3 L3 s9 C# k% a% Y& A, ^
- }
5 m& W& H7 L+ K" i* W% s - else{5 l# d7 P9 M3 m/ n& }3 C2 \( w- ?3 r+ m
- szBuffer[ret] = '\0';7 }! R& o0 B* i
- printf("RECV: '%s'\n",szBuffer);
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- }
& v5 _) k7 y v- `+ x5 w - closesocket(sClient);' c0 ^4 w" _6 X
- 8 E' t( f& A7 V6 S
- WSACleanup();
* P. D+ m8 l! Y+ ~) _ - return 0;
+ z2 S1 e$ ^- H: U O$ p# ] - }
复制代码 服务器程序:server.cpp* v/ d- ^% B! C$ i6 q
- #include <winsock2.h>
8 e5 B1 J% o$ R$ a" Z - #include <stdio.h>, P: h9 F) Q: ^- O# e8 f# I, [4 S
- #include <stdlib.h>0 V7 s1 ]0 O% l6 M- x- p" \* I
- # q2 |: g: x' Z& g
- #define DEFAULT_PORT 5150, o4 n* W. x0 k
- #define DEFAULT_BUFFER 4096& }2 j3 X; ^ B1 i
- 3 X) L0 {9 ~' A6 I, X0 m. S
- int iPort = DEFAULT_PORT;, N2 H) E- k4 l* W- w
- char szAddress[128];
% Y3 X5 [0 ` ^/ }* U, b. z
3 w% j5 o. O* F' n* Q; q; `7 G+ P- DWORD WINAPI ClientThread(LPVOID lpParam)* ^) ?6 |, Q( U& C& R$ s# O
- {
! }! N+ E0 @! w0 G9 C! x# d4 _$ V6 ? - SOCKET sock=(SOCKET)lpParam;) ]9 V8 v# O; G3 Z
- char szBuff[DEFAULT_BUFFER];
1 ?- P0 ]8 m" t, Z" W, l* Z - int ret;
8 N: X9 Y- I5 F7 R5 z+ [9 B
8 d2 |) w, v% O0 J2 \& ~- while(1)' ?; M7 W, g( t" s! m! H& R0 {
- {: q0 l. i5 J4 o3 @& ?) E- Z
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
2 p. E6 E3 \' J/ g - if (ret == 0)
; X$ s9 Y$ L7 s2 u9 h - break;
3 V7 g3 A% v' u: j - else if (ret == SOCKET_ERROR)
7 s/ {3 Z8 g( x8 j4 v! ]" Y - {
# c$ [% T- h# H - printf("recv() failed: %d\n", WSAGetLastError());
' R% ]6 Y; Z2 R6 K, \ - break;) F8 N+ h, r8 C
- }
8 A, q, f7 U( a7 g - szBuff[ret] = '\0';* `9 t, v$ V1 u9 c/ u/ x6 g g
- printf("RECV: '%s'\n", szBuff);- E% ~7 O: T" R
- if(strcmp(szBuff,"abc")==0){
7 E7 H& [+ E0 y2 U e. I - memcpy(szBuff,"Send the correct string!",25);
4 Y" R% d- [ v6 Y3 B0 k1 w/ ?7 x Z - }( |0 p2 m: L6 c
- else{
7 u" `1 T" Z$ w. P6 g6 } - memcpy(szBuff,"Send the wrong string!",23);9 B1 S h: H! J4 d% A5 |* J! v7 P
- }
1 J1 q0 A, H& t3 k - ret = send(sock, szBuff, strlen(szBuff), 0);
! H3 Q- [; t5 M2 _( H/ c" Y4 ]: ] - if (ret == SOCKET_ERROR){. z9 \- q+ R0 h0 }' B
- printf("send() failed: %d\n", WSAGetLastError());
& C% R6 ^! [4 c% z; k' I' h- g3 I - }; U# M$ I8 Q3 x% i4 l
- }* L" _! G$ U3 |5 v* W0 I ]: ^
- return 0;7 F# D% h$ g& {: g
- }
& y& ~. {% z p' r/ X5 c* g
% b0 b+ O8 w; M" s- int main()
8 G3 M* U5 l5 M$ @" O7 y - {) ^+ @: }/ l; N0 N
- WSADATA wsd;
" X& \7 ?# Z- K, W) s: } - SOCKET sListen,
j% U$ W. F: |4 b. a7 Z - sClient;9 r* t K- L) `/ }9 |. X2 J: S* v
- int iAddrSize;
# k; q/ ^ L$ x5 p5 _ - HANDLE hThread;0 G; c) _) a/ z
- DWORD dwThreadId;3 e/ ?# b& l/ S: d: ~6 M
- struct sockaddr_in local,
! M: S+ F3 h9 H4 N - client;$ S# P3 }0 }- B& ]7 T) V" a
# G# ~( p* g! F F- L' p- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)% h* O; Y2 B( |
- {; N( X2 B6 L2 n& k* g3 y
- printf("Failed to load Winsock!\n");+ U- f! H( [" z: O4 d p! t( S
- return 1;( I) ~' Y! ^9 [+ I- g5 H- s
- }% y7 p8 i/ @; {8 h& N) Y% d
- // Create our listening socket
@) Z6 F) T4 D( H - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);& A% i3 F. m+ a, {
- if (sListen == SOCKET_ERROR)
! I- d' u( ~6 S' x - {/ c$ u) u0 D. u: \$ k2 a
- printf("socket() failed: %d\n", WSAGetLastError());
$ T4 q5 |# b0 D8 } - return 1;
! V _2 Q& I( D0 w - }7 L! A( h( z. Y1 D5 F
- local.sin_addr.s_addr = htonl(INADDR_ANY);
8 n3 _) `! N: [4 V* p - local.sin_family = AF_INET;: r/ h$ V. i, f7 h! g% s
- local.sin_port = htons(iPort);8 a7 M9 C, u) U: Y9 H# C; z: e
, \, Z F, b5 k- {- if (bind(sListen, (struct sockaddr *)&local,- e1 O2 p2 v* ~# |# h) u& ^; J9 v
- sizeof(local)) == SOCKET_ERROR)
: w5 P# W# Q& e9 y - {: _7 I2 K6 ?! F I9 q- f* z
- printf("bind() failed: %d\n", WSAGetLastError());" d! m- L' F1 W* }
- return 1;
: V6 M5 {7 @8 |/ ?; \ - }
8 I" L0 r& l/ i2 d - listen(sListen, 8);
- j1 b8 v9 s# A* z( L - // In a continous loop, wait for incoming clients. Once one
6 z+ z& N7 n ?* V9 Y - // is detected, create a thread and pass the handle off to it./ |) C5 i r' R5 v
- while (1)
, F& v W4 q) r* d, _7 ? - {5 ^' q: N) v2 X0 `% Y+ U0 l
- iAddrSize = sizeof(client);4 }7 F+ i& v9 K3 k2 v0 O
- sClient = accept(sListen, (struct sockaddr *)&client, e5 B% Z* u6 M
- &iAddrSize);
: E* X: a( {3 `4 b( A5 v, ]& w& g+ e - if (sClient == INVALID_SOCKET)
. ^8 l* H, S! ~4 t4 Q - {
6 J' H5 u# b, O6 T - printf("accept() failed: %d\n", WSAGetLastError());, E1 k7 R. X6 P6 g, X
- break;# n) G% K' r. h1 c' V
- }
! U+ F. _! B1 \5 O0 A& W3 c - printf("Accepted client: %s:%d\n",
3 w1 f9 v' n/ N; t \8 w1 l - inet_ntoa(client.sin_addr), ntohs(client.sin_port));$ T+ t% a0 D ^ H g! H3 _; p( w7 j
/ w+ q: E5 G$ ]. |- hThread = CreateThread(NULL, 0, ClientThread,7 Z% N; ^5 O6 ^2 [5 ?0 E# `4 M4 X
- (LPVOID)sClient, 0, &dwThreadId); J j6 V1 ]* v9 G W
- if (hThread == NULL)2 T( H p, ~% O$ r. I6 ^
- {
" M! s2 O, t4 q5 o2 [ - printf("CreateThread() failed: %d\n", GetLastError());# E7 ]3 x% O& I4 M# s% d
- break;1 X2 E% k4 q: d
- }) j7 G& R; v* L2 } Y, D
- CloseHandle(hThread);4 h2 f# G. f; _# b; i
- }
9 |4 v9 q1 ?/ i - closesocket(sListen);
3 `0 W- F. D! | y9 F! u% { -
+ \& F7 ~9 u# F! _* ^9 U2 q O - WSACleanup();; s/ u: p. _2 C0 ^" b7 o
- return 0;6 G+ u: I2 D% E
- }
复制代码
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