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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。: Q1 {/ m* o9 p1 A Z. T
客户端程序:client.cpp' K) @: x5 o; j$ h5 e
- #include <winsock2.h>
+ l" w- |. z0 D) w m - #include <stdio.h># r/ [! |/ _+ F6 Y, V H6 F8 m. \
- #include <stdlib.h>- h$ }% \; h+ I9 a
- ! B8 T' X9 P3 ^6 Y$ P& A
- #define DEFAULT_PORT 5150! O8 q" C5 P, w# B7 t) }1 @
- #define DEFAULT_BUFFER 2048/ t2 S$ B) p% j- \+ g
- . {* b& r0 m) S: G/ W
- char szServer[128],. b$ w& X m" }4 j' ~
- szMessage[1024];, J# _: ?! W3 S! }( t
- int iPort = DEFAULT_PORT;
) e3 {: s+ k; X9 l" C* L
* n; O+ h) n3 V) M4 V, l# I- int main()$ e" s. a0 `! w
- {
( i4 n' e# q! i( c R2 j: l+ \ E - WSADATA wsd;
4 |$ H4 i' X, R - SOCKET sClient;
H# \' f$ `3 U- e+ s4 @- z - char szBuffer[DEFAULT_BUFFER];! K% f. j5 ?% f2 B
- int ret;
# n% J2 r: w( D* X ~$ y* W - struct sockaddr_in server;, {0 Z; a; V( K: C q, a; l
- struct hostent *host = NULL;& v7 C/ v, F% ~; C" o q8 F0 n. L9 o2 E
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
) a; q$ D- c% W$ k - {, |( M7 \6 R" {5 F% L- X% k _: h
- printf("Failed to load Winsock library!\n");& w4 q& N7 L8 V) o* S" p
- return 1;# ~0 |7 d2 U6 ?/ R! X
- }
" R' {" X: R/ A, \+ s& v - printf("Enter a string to send to server:\n");
, }1 W4 B+ \- u9 |, P; a% d, u+ K; a - gets(szMessage); `4 I8 u2 m; @+ M
- // Create the socket, and attempt to connect to the server
c J5 M$ K2 n. ~6 J4 L: z7 r) G - sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);, k7 C% }3 U O5 \, g& h, V; }
- if (sClient == INVALID_SOCKET)( U. w3 y4 h( j" T# B& G3 G
- {1 q) ~% X. P) a/ @5 A
- printf("socket() failed: %d\n", WSAGetLastError());
" u$ A3 q6 z% v7 t' B+ y9 a: j - return 1;9 H- `2 h$ @' r: Q/ }- R2 z8 S
- }9 }! K0 n9 H9 ^3 c( q# C# G8 @
- server.sin_family = AF_INET;
2 ~) h( {, L- p: t! M - server.sin_port = htons(iPort);- [4 a2 a. ^6 `3 W! q5 L/ Z/ M
- server.sin_addr.s_addr = inet_addr("127.0.0.1");/ q0 g! h" K" e0 |
- ) h' R8 Q- t9 M( P$ w
- if (connect(sClient, (struct sockaddr *)&server,! h0 t8 a; s* q4 q6 u
- sizeof(server)) == SOCKET_ERROR)$ }6 `! O3 F% T# |9 i* U! s& S3 ?
- {' S. B2 @8 y( K3 O( r2 h7 i, D
- printf("connect() failed: %d\n", WSAGetLastError());
7 `5 _6 d0 p% O6 ~& p/ n ^ - return 1;
2 _7 X8 K3 k% K/ F' ?5 E - }! g) d4 f! i5 f2 N2 V& n! f
- // Send and receive data9 t5 N4 R+ i( _+ M
- ret = send(sClient, szMessage, strlen(szMessage), 0);! S$ x! O1 y3 _# G9 J4 h) U# _
- if (ret == SOCKET_ERROR)
8 o! f i3 i! m5 I( f6 R% U - {
& f: z! v# S% P7 k7 p - printf("send() failed: %d\n", WSAGetLastError());
^% S5 N* j) l4 v6 s/ u0 x8 r - }
0 e- s; F' E2 }1 ?1 o( M* Z - else{* n, Z; O \1 p) k' R
- printf("Send '%s' \n", szMessage);
1 j! U+ i1 W/ v9 I2 G& S+ r& P- @ - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);
+ C1 X' m2 a$ f - if (ret == SOCKET_ERROR){
3 t# i) X) i3 c2 D/ G# u - printf("recv() failed: %d\n", WSAGetLastError());
; {$ ?# A, v4 Y j$ D C' ` - }7 x3 t8 |1 b4 j
- else{
& W: R$ v; _3 b4 l+ n9 O - szBuffer[ret] = '\0';
* X& k8 p% k. j4 ?( n - printf("RECV: '%s'\n",szBuffer);
& N* I* n1 V- h- i - }
0 x6 Z2 |; k0 A7 ]" B/ D - }
1 H: F- o7 P2 _% S - closesocket(sClient);4 I! f* f( z5 x$ m' ~+ _
9 |+ I: P; t' m, b g- WSACleanup();, y6 S7 x& z# r5 F
- return 0;
0 P1 P6 E- Q: J A o6 O, i* B - }
复制代码 服务器程序:server.cpp1 \" o: P8 G7 V. Y0 b2 R K; h
- #include <winsock2.h>
) J. s" @6 Z% g - #include <stdio.h>
1 E3 \5 p: Z6 T! } - #include <stdlib.h>. H( M" p* ?$ K4 ~: q/ i1 ]2 n4 b$ p# c
- : E% |2 V1 [% Q) X
- #define DEFAULT_PORT 5150* M/ m0 }1 ]1 f
- #define DEFAULT_BUFFER 4096& x: d% O6 V4 I& f- K
6 o: V3 E7 B! E+ l' f- int iPort = DEFAULT_PORT;# w1 w2 {5 H; l: x
- char szAddress[128];5 }9 n V% a- k. E0 ]8 F* P
- ( O: {. S6 [+ j& R) |" V/ f/ l
- DWORD WINAPI ClientThread(LPVOID lpParam)& E" b7 |4 w% ]# b/ b) S6 e
- {! G, O: ]% D S9 |8 x
- SOCKET sock=(SOCKET)lpParam;
: E" A" p; v4 b, V' V8 e) z - char szBuff[DEFAULT_BUFFER];
- ?0 ~# F/ n1 j - int ret;' t' A2 b0 H% E: o: r4 B; x
- 7 q# Z( n3 F' l5 o! M
- while(1): W" f0 T8 y8 ~% t
- {# |: C R. v7 C0 n- B
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);, G: O. S6 `& k: T" A
- if (ret == 0)
) \8 p8 R* r1 G. S O; t - break;
; n0 C- y2 Y _: x0 g" U - else if (ret == SOCKET_ERROR)2 c# F2 g u! ?. w
- {
& Q+ K0 N) N9 Z9 l3 w - printf("recv() failed: %d\n", WSAGetLastError());# D8 {: j2 `4 [
- break;
0 |5 C+ h. B4 _6 \+ R/ G - }. v( ?* A. e4 [( ~3 e1 P y' E
- szBuff[ret] = '\0';
6 P- Y2 Z8 m: F+ o ^0 f - printf("RECV: '%s'\n", szBuff);6 M) ^: k8 Z- r2 d
- if(strcmp(szBuff,"abc")==0){! `0 y) l. k- z9 o4 B1 e
- memcpy(szBuff,"Send the correct string!",25);
% G6 T# S8 X$ ]6 f) J% A - }
% j3 e6 V, {) Z - else{
/ ~" N4 [- C, o3 b9 o7 N @% D - memcpy(szBuff,"Send the wrong string!",23);
6 @; i& k* ~2 p- p# f, L- a - }" m- Q/ Z0 O6 o, r
- ret = send(sock, szBuff, strlen(szBuff), 0);
2 n& `' C6 K2 ^8 l1 F# b - if (ret == SOCKET_ERROR){6 G4 R b5 g& l4 N: x' p
- printf("send() failed: %d\n", WSAGetLastError());
3 |' U, n2 @' ?; t1 p% a - }
" Z* a# t! A3 t( ` - }' \. \# v9 x1 O) n4 T( D
- return 0;
4 R* L# |" g" i7 m& u2 K - }
" f t/ }1 c6 p( K3 l4 c - 5 W- m7 R0 Z5 j4 v+ ]
- int main()
) s+ z- i, T3 j: c% \ - {/ g5 U( \ j0 l, o4 Q9 ]8 x
- WSADATA wsd;' u i% l% i. k. }- {
- SOCKET sListen,. f' w7 ^' W0 a0 Y- ]- X
- sClient;& p! H9 g8 x/ [: [2 @% r) u) i
- int iAddrSize;
3 S* I' i) H5 ~) K, P - HANDLE hThread;
* y8 Y/ G2 H% K - DWORD dwThreadId;
2 r% U& T8 {( X" ` - struct sockaddr_in local,
" f4 _( r+ Q: ], ]/ x- C. N/ F6 t - client;
" e$ v. \; ?8 ]9 q! H" C
: A9 v) ~4 L+ M! b' ^1 H0 f- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)& b6 r1 L* S9 `$ y; t
- {
1 M6 H0 F9 X+ b - printf("Failed to load Winsock!\n");
7 {9 h! K. U, J3 G( w) j - return 1;. m5 H) j* a9 x/ n4 }9 _
- }
0 V+ m8 v {6 \, j( M- { - // Create our listening socket
) [4 J' L& \* L - sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
: H( ~: j [; C. \ _4 S8 a - if (sListen == SOCKET_ERROR)4 d# {5 T7 Y4 U7 `# J* E( x. J
- {1 P& n' D# F/ f, O* e% U% D" ^5 b
- printf("socket() failed: %d\n", WSAGetLastError());
5 P& l |2 r* }" Z9 e) ~ - return 1;
# a3 Z: ]2 K0 x c4 x) b" J - }
- y- P# v0 v {5 D) @& L - local.sin_addr.s_addr = htonl(INADDR_ANY);3 p3 x& M. @2 a& `; w/ Q1 d% v
- local.sin_family = AF_INET;
6 |& V+ i/ u7 X0 C$ m7 O1 A p8 z - local.sin_port = htons(iPort);
- ~. f3 l- @* z' a+ E! l - ( o6 H7 j; ]2 Z: B: t# d9 _
- if (bind(sListen, (struct sockaddr *)&local,
/ [+ u! y/ H& K - sizeof(local)) == SOCKET_ERROR)
) G g2 x1 ]5 P5 f. D - {5 n1 V/ A, ?6 h+ X) B
- printf("bind() failed: %d\n", WSAGetLastError());- A, d8 x: c2 R6 x$ H, z
- return 1;
2 l6 ~* \& E! R1 ], p* _' e' { - }
2 j8 C! y f+ f( f- ] - listen(sListen, 8);& ]6 G% ?: p* Q( U7 E
- // In a continous loop, wait for incoming clients. Once one2 q1 N3 G! \( m1 r
- // is detected, create a thread and pass the handle off to it.% P* _ Q; H* _2 H; Y
- while (1)
$ l# e8 V+ L" L7 ]7 T - {
9 u1 C- m" v+ \9 g' E - iAddrSize = sizeof(client);) y( A) b, v, s/ Q
- sClient = accept(sListen, (struct sockaddr *)&client,7 J7 d, _# |; J) d* E& e5 k
- &iAddrSize); 8 O4 z, J _0 `9 A6 b5 W }
- if (sClient == INVALID_SOCKET)
7 k4 m9 h3 D1 k5 k( U( J - { . {0 a& @# r: T% q) r8 A
- printf("accept() failed: %d\n", WSAGetLastError());/ I6 }& f1 K: U
- break;( H5 V: a7 g; y1 X
- }
6 |6 I# @9 h/ Q' x8 _ - printf("Accepted client: %s:%d\n",
; `7 r- v F) |4 y. s) L - inet_ntoa(client.sin_addr), ntohs(client.sin_port));9 H! l( j! \/ k8 e- U% U
- 4 y" L2 j& d* Y6 Y$ L
- hThread = CreateThread(NULL, 0, ClientThread,
; d9 G+ {" ^1 ^& M9 Z( R9 {8 a - (LPVOID)sClient, 0, &dwThreadId);4 u7 l* }" R$ b/ x
- if (hThread == NULL)
7 ^+ |# n2 N$ o6 m* H6 l5 z - {# d0 T, e- F# G! c* R+ E7 V
- printf("CreateThread() failed: %d\n", GetLastError());% O7 S0 W% j5 j. O; W: _5 t
- break;
$ W* b% Q2 x. w o- Z# j - }
3 y* @. ?4 K# o - CloseHandle(hThread);
) A8 l" t/ n0 l3 S$ L' F% @ - }$ c: {9 ]) F+ L9 n3 y' l
- closesocket(sListen);
% X% I9 k, v0 x -
. \* n9 q* `, G2 S( J - WSACleanup();
% }+ ?8 Z# |6 u; N r - return 0;2 X6 M) f) B" W. I8 e& m# U
- }
复制代码
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