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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。
& K G8 J/ a3 }3 B1 M客户端程序:client.cpp+ M1 M$ d0 Z5 Z* z. R3 n' I" q* t
- #include <winsock2.h>
7 ^/ U9 B' W Q0 |7 x0 M - #include <stdio.h>! @* g& S# o% P. A8 P0 ^% p
- #include <stdlib.h>
2 P/ |. X7 Q- e X1 P! O
+ g5 u8 q6 l5 l; K/ \" E5 V- #define DEFAULT_PORT 51505 O- \% _5 @4 J; \
- #define DEFAULT_BUFFER 2048
+ Z D6 k7 M$ p7 U1 p
7 S' k2 ?" S% k ^& u- char szServer[128],
# b6 D& V1 a- G5 ^5 Q2 x2 i - szMessage[1024];
" v' g5 S8 v4 O9 b0 x) i* R+ e" Z - int iPort = DEFAULT_PORT;+ @9 a! [( W+ a
( N1 w% U( m7 i o7 x( ]- int main()" B! g! G( U. {4 o, v
- {
* l4 V: }5 G: C! G - WSADATA wsd;* E$ A- R! B' a8 ^8 [5 P
- SOCKET sClient;
+ P( X/ c. U, { g7 v" _7 W - char szBuffer[DEFAULT_BUFFER];
# y- F' k$ k" i3 H, w - int ret;: e! W2 ~; d( |, `7 b
- struct sockaddr_in server;& t4 a% j8 X2 W! }+ ?
- struct hostent *host = NULL;# {& ~# W; I; I; E9 |+ r e
- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
& T2 L* { n1 n* f - {
/ O1 o6 R1 ^+ p; H - printf("Failed to load Winsock library!\n");
* C) ^% {5 C% ~2 o0 ]6 T) k4 y( }+ S - return 1;7 d" b; ~' ?5 Q$ ^0 v' G, @
- }
! T4 k# @" Z. M2 @3 N$ s/ B - printf("Enter a string to send to server:\n");/ G$ t2 y' ?4 I/ H6 F) s
- gets(szMessage);: x" T6 ^. c& ?) |1 s' e& k3 u
- // Create the socket, and attempt to connect to the server. v7 h6 c4 u; l' `6 ^/ q
- sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
4 C8 P: `! _$ @8 T - if (sClient == INVALID_SOCKET)
0 } \8 _. ]- C3 m - {
& g- a: b" F) i9 F# g) N4 k- ] - printf("socket() failed: %d\n", WSAGetLastError());
) U" q0 g) p' v& H% Y& k3 l: l. ? - return 1;
0 p: ^! u, f5 l) D" e& z - }
5 V9 L8 f( {# @ - server.sin_family = AF_INET;
: J: J H" u6 Q6 c4 Z+ C/ U8 O - server.sin_port = htons(iPort);
' Y- P( c. j! V* T" U% r o `$ L4 d - server.sin_addr.s_addr = inet_addr("127.0.0.1");; }3 f4 t' ?/ z& B6 } t
- % l, ~" ^2 D6 s& \6 ?
- if (connect(sClient, (struct sockaddr *)&server,: K, {. o5 _- b2 d0 }: X4 f x2 d
- sizeof(server)) == SOCKET_ERROR)
/ b- t# Y5 X, d' E+ F - {6 H7 d# [' Q( D
- printf("connect() failed: %d\n", WSAGetLastError());) U F- F8 X+ P
- return 1;: r# T5 [9 Q+ p+ U9 D/ y. T) U
- }
; ?! ~; H* Y4 W* G) ? - // Send and receive data
) |% x9 v2 S5 }1 W; p) N - ret = send(sClient, szMessage, strlen(szMessage), 0);
" L# i: P9 B( ~ - if (ret == SOCKET_ERROR)0 s, U0 H7 J/ D2 v, W
- {, \" V( F/ I' T
- printf("send() failed: %d\n", WSAGetLastError());8 g E; \- j. p' u9 r* Z2 A5 C
- }
$ @8 ~* Y0 @7 Y6 Q$ T. s6 b - else{
" S8 E) h7 A6 W( ^( }& q - printf("Send '%s' \n", szMessage);
! a4 A; ?( l8 J0 V; n8 T - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);% m5 w9 `/ Q, e7 X
- if (ret == SOCKET_ERROR){- J/ }1 `3 E7 T5 C
- printf("recv() failed: %d\n", WSAGetLastError());
+ |" r$ u" `1 ?/ h% j - }
& s5 E; Q" S3 ` - else{
- z# m6 _2 V9 }* i$ C - szBuffer[ret] = '\0';& G* Q0 |$ d: I# D! w' }6 P" U) M
- printf("RECV: '%s'\n",szBuffer);* V4 p0 E8 I1 o9 [# R
- }
+ P+ i6 r* K# q* L( L - }
( Y+ ]& i- Q- ^! w, _ - closesocket(sClient);
) Z( {; c$ [- G1 m
' Q$ I( W9 f8 U+ M7 D+ _1 G$ w s- WSACleanup();
5 c0 p# U' q$ E1 ~/ X/ l" D - return 0;' _. I( W( }. q* \; V5 X; Z
- }
复制代码 服务器程序:server.cpp
. N( ~; O5 z4 s/ L; e; K2 @- #include <winsock2.h>
5 c: G! J4 q# y! R. ^* |5 X - #include <stdio.h>
1 N5 w1 E5 |- O$ F - #include <stdlib.h>- n" ?' `+ |& ]" Z2 Y: \
" p" ^4 ?+ x" R" k- #define DEFAULT_PORT 5150: O: \* q! H( V( t: k. D
- #define DEFAULT_BUFFER 4096: Y+ b1 ^9 p$ s' L1 U2 [. u0 c) j. @
9 j" T2 _6 h) M, F- int iPort = DEFAULT_PORT;2 g) r5 b5 e A# t% ^* |
- char szAddress[128];
# G& H7 {0 g& ^2 e" C3 D i - + E! C' |, i. a) u/ Q
- DWORD WINAPI ClientThread(LPVOID lpParam)
! R$ O2 Z9 f' g- q - {
2 i! b: j3 H0 f% f) y) \. b - SOCKET sock=(SOCKET)lpParam;9 {$ m0 [( [$ ?4 X
- char szBuff[DEFAULT_BUFFER];: A U% b$ X6 W% \
- int ret;
; \+ D: L2 d- I; I; _% T% m
2 N K4 o& q p! R" p* a- while(1)9 Y! h# [6 c+ D8 `) [: A' v9 d
- {; F: l/ x1 D4 K
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);) O ?, ~3 \! h% q. x
- if (ret == 0)
. `1 p d9 p4 f V - break;/ x1 n8 V( p. K+ S+ P$ z
- else if (ret == SOCKET_ERROR)& \' d. a e$ M! }5 P) }) m0 H& x
- {
% e! c- G) ^3 W2 x; {8 w - printf("recv() failed: %d\n", WSAGetLastError());, n. e& L8 `( ]" k2 j
- break;
M/ G* I: g, H1 X+ X. q - }
, k% B. N0 m! x7 C1 _: r1 t; [* d - szBuff[ret] = '\0';/ \" a9 O! H# q
- printf("RECV: '%s'\n", szBuff);
" j+ D4 ?& y, k7 q - if(strcmp(szBuff,"abc")==0){4 ^6 b7 ~" F+ F& w
- memcpy(szBuff,"Send the correct string!",25);- {2 J# n- k% C' t+ } }, Y
- }
% _: L/ y! v8 R" z& O0 T - else{. t7 O3 }, V, E5 H7 ~
- memcpy(szBuff,"Send the wrong string!",23);
8 |! z2 e8 B+ k9 l- [' r - } S5 D2 v3 e# p- I) ~- ]
- ret = send(sock, szBuff, strlen(szBuff), 0);
9 f8 T; w& B2 ]- d7 F' O) o - if (ret == SOCKET_ERROR){
. J8 n5 E+ w F2 m# c3 H7 l8 V - printf("send() failed: %d\n", WSAGetLastError());
( \# e4 O) ~ }& n - }2 X# @" o( t1 Q% t
- }% l4 P1 `! t1 w- z3 M/ Y
- return 0;: \) F, b9 W+ n z# j8 ?
- }! t% ~% S9 h4 y% c' S0 G
- % V3 R2 Z1 k% C T
- int main()
# t1 M# W8 b# Q7 M: N' [8 Q - {' D5 H. H4 z( f( M: [
- WSADATA wsd;
0 C# W4 b9 w6 s - SOCKET sListen,
3 g# ?8 u) F ?- X8 F; ~$ T - sClient;6 j, A( {' k b8 y, a$ a5 J! _
- int iAddrSize;
9 M- t& B8 V: y7 t% t+ [ - HANDLE hThread;
( R5 j# K9 d. R - DWORD dwThreadId;+ o( n0 ^/ D( K; Y9 h7 D& P/ @
- struct sockaddr_in local,, V8 o7 S. q$ a3 E
- client;8 u. ?& b+ w( r1 w$ S
: o+ `& I3 d/ y% U* F; R- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0), Y6 o5 K/ w! T
- {
! S& P3 S+ V: ]* A) v - printf("Failed to load Winsock!\n");
, c; F2 }% v+ p$ n3 h. X$ R - return 1;2 K9 h4 z) Y+ E+ n# Q' U
- }6 X$ ]. ^, T0 |; f4 Q4 R
- // Create our listening socket9 s( z w( R7 F! _' s+ Z
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);! x( F6 F& x4 {6 P6 d
- if (sListen == SOCKET_ERROR)
8 d( m9 v( v5 F1 n2 b& [0 f1 a - {
: Q. `# q6 K) \9 C& W - printf("socket() failed: %d\n", WSAGetLastError());3 x# a0 M) W7 W& C, r! `2 W
- return 1;
8 I$ q( k: }! [2 l6 k. M" c - }
0 _: P+ Z; m: t: X - local.sin_addr.s_addr = htonl(INADDR_ANY);) K; E) M4 a. o5 s
- local.sin_family = AF_INET;- C% D' s; i: @* ?9 h. L
- local.sin_port = htons(iPort);: T/ E0 n! l# F
, ?, }! c8 q1 e- @, g' M$ o- if (bind(sListen, (struct sockaddr *)&local,2 O* u, m0 |& P" z1 o. [7 r
- sizeof(local)) == SOCKET_ERROR)1 c5 P k2 u3 {7 Q
- {
5 t6 p7 E# O0 {( m - printf("bind() failed: %d\n", WSAGetLastError());
3 p( l( H7 ~5 B- ~0 r) p2 I0 S - return 1;
/ e# Y- f6 s# R x7 ^ - }0 z' a6 W5 y' z2 x1 {
- listen(sListen, 8);* [+ S5 y1 H# X" G2 T
- // In a continous loop, wait for incoming clients. Once one2 U4 G i# S1 |0 E3 s$ V
- // is detected, create a thread and pass the handle off to it.2 I6 }+ n1 d- J) {# d
- while (1)
N& a' k- Y1 }5 t2 i, G U, N - {3 w* ?' l' I/ R& z/ u" c
- iAddrSize = sizeof(client);( D9 [; @8 U2 @' g4 t
- sClient = accept(sListen, (struct sockaddr *)&client,8 D9 Z* D8 \! E7 E8 K! E8 @( a
- &iAddrSize); " V" c1 J9 V7 Z W
- if (sClient == INVALID_SOCKET)
# ?' ~/ M7 P+ q$ Y9 v" V - {
3 a$ P+ a7 E+ h6 Z# Z - printf("accept() failed: %d\n", WSAGetLastError());& F- u+ o8 j% n E+ q) O
- break;
G/ _! C! U5 m$ Z) S, M, F - }
E$ S6 q ~! R* T1 c$ |1 E, ] - printf("Accepted client: %s:%d\n",+ G1 e$ B1 K; Q! c' M
- inet_ntoa(client.sin_addr), ntohs(client.sin_port));$ _2 Y, B# U+ y* @" I2 A
7 ]: ^5 p1 ^# d1 L. r: `- hThread = CreateThread(NULL, 0, ClientThread,/ f2 A6 Q1 d6 T' L* e/ E3 D
- (LPVOID)sClient, 0, &dwThreadId);
5 F$ ~" \4 a- Y6 U# N8 F. K - if (hThread == NULL)
5 G @4 h2 d! y7 L* g5 D4 C - {
5 v; L: G X6 T# z- Z5 A$ |, K - printf("CreateThread() failed: %d\n", GetLastError());
, r% B, v+ Y4 y2 W - break;
0 B/ R) X8 N8 ]# o - }
. I% B) a$ N, C5 n" r - CloseHandle(hThread);9 g* B2 l- W* h3 P! p
- }
# X- [) G$ ^+ c3 Z - closesocket(sListen);. w) Y- n4 E8 I. ?* Z, O* T0 y
-
0 l6 _1 V4 p% d4 S Z+ {9 y - WSACleanup();
. g% r' J- x$ z& P b3 o - return 0;
1 A j9 ?4 z: \0 d/ ]5 \, T - }
复制代码
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