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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。1 Q$ Y, C/ b- {3 a% U" D( _% V4 x2 O
客户端程序:client.cpp
% ^! H' F' s. s# N- #include <winsock2.h>
; H* w2 E5 n; L% U - #include <stdio.h># _& H. x- q/ {+ G+ T( S. J |& }
- #include <stdlib.h>1 c* _1 Q+ N/ l# f d+ n
! Z _3 k9 }" U: c- #define DEFAULT_PORT 5150. x" u: i$ b1 Y
- #define DEFAULT_BUFFER 2048
~. G- }7 O+ u - 9 |( ?+ [. s; l4 x! J ?
- char szServer[128],
1 m' D2 V+ ?& V9 Q3 a' \ - szMessage[1024];' E5 p8 x( L! N1 L$ ]* v- I
- int iPort = DEFAULT_PORT;
, }* ]* a3 F2 T* F+ E+ D
- y3 z# j# H- U p6 r& d" b0 V! H- int main()
4 n! `/ F6 e3 K7 y$ P5 } - {- Y/ Z1 r5 G4 J" F" @6 A
- WSADATA wsd;
. w+ {% N h C) F* {7 X! u - SOCKET sClient;
; P p" U' R2 h - char szBuffer[DEFAULT_BUFFER];6 v7 J G$ g/ v" q( x9 j
- int ret;6 }$ A3 G; i" @' z1 C: U2 a9 A, Z
- struct sockaddr_in server;
2 W D: J' @& L$ ] - struct hostent *host = NULL;
7 E1 ^. U3 J7 h. X( W2 y* ^ - if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
- e) t' r' U2 r& k - {
6 r' X3 S' j& u3 H8 A - printf("Failed to load Winsock library!\n");+ v. l, _+ q, a" r2 ~
- return 1;
2 ]( k5 I; |) o; s& z - }
; @+ g& t4 R6 O9 z - printf("Enter a string to send to server:\n");5 E# Y/ @, s4 W" Q; M
- gets(szMessage);
/ N5 E9 i. n- [- H: D - // Create the socket, and attempt to connect to the server
, k# b9 R# t2 d0 {) x2 [ - sClient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);2 t; ?- }6 a: g$ d% R1 I8 F
- if (sClient == INVALID_SOCKET)
$ G( X8 I3 M! A& |8 N! i - {4 Q, a4 F; r! V4 I. l/ Y9 a" J
- printf("socket() failed: %d\n", WSAGetLastError());6 s4 o2 _) p" G( q& v: A
- return 1;
, O/ G) f- a. U: v: T5 g - }
% }) N* g' E" e" D - server.sin_family = AF_INET;9 a9 V6 Y+ L6 ]
- server.sin_port = htons(iPort);
, Q: T4 ~% G) f% j# B$ o7 E7 `# q/ q: q - server.sin_addr.s_addr = inet_addr("127.0.0.1");
8 p4 w$ W( I3 j) @) }
- H+ W% j8 Z) T' s- if (connect(sClient, (struct sockaddr *)&server,* {. Y$ E3 v0 |6 V8 Y* J( U
- sizeof(server)) == SOCKET_ERROR)# e- W* T% ~: V, G9 g0 Z0 _. R
- {
4 O/ W. J. p! }: t - printf("connect() failed: %d\n", WSAGetLastError());3 b. r0 }2 ]) g% b4 L
- return 1; n5 ?8 S; Y0 |3 K9 W
- }: _2 u8 c& B/ i" H; ~
- // Send and receive data
2 M# s1 K" U# ~9 J( d3 ~ - ret = send(sClient, szMessage, strlen(szMessage), 0);
8 ?5 V' u6 p Y - if (ret == SOCKET_ERROR)
$ t/ W4 B" T9 q1 ?6 o1 M - {# T8 e# J' l+ W/ C2 k- c
- printf("send() failed: %d\n", WSAGetLastError()); l: `( z3 G1 }/ |9 G
- }
: B3 e9 Y. A9 z) t) o9 a - else{
: D! Y8 `) c; ~$ z# M( L - printf("Send '%s' \n", szMessage);
* ?! k h; H( P! S: \$ Z3 E - ret = recv(sClient, szBuffer, DEFAULT_BUFFER, 0);) n$ T) ^ \: q& Y1 w
- if (ret == SOCKET_ERROR){
, f% G5 t; b. z5 j - printf("recv() failed: %d\n", WSAGetLastError());& i7 i0 p! p% Q
- }9 N) g3 D5 ]' G' e ^; i) T" ?
- else{
7 i; d0 F$ O% l - szBuffer[ret] = '\0';
- d3 X( t8 l' c$ e3 z: P: s - printf("RECV: '%s'\n",szBuffer);6 V% w P) [. m: ~* D( c9 k9 |
- }8 @7 O% U) B+ { Y" `
- }/ a" m7 {- N4 D# b4 C7 T8 g" K0 g
- closesocket(sClient);
7 G' t# Q U) u$ g2 i, O+ y0 t
! j* m3 B/ @) d% Y8 u; a- WSACleanup();4 E2 J: P X8 d7 }4 H
- return 0;
. o1 S% @$ E5 m2 M9 \+ y) u6 h - }
复制代码 服务器程序:server.cpp" B! b, k0 @) L5 A- |. S4 n. q5 X
- #include <winsock2.h>
# v7 M: n& j5 b0 j - #include <stdio.h>
+ B5 @6 g0 s/ K( U2 { - #include <stdlib.h>0 [7 V" V2 P j6 }! w, ]# _: Q0 C
- 5 _- L, r+ {. ?$ Y
- #define DEFAULT_PORT 51505 j h4 O5 B( E
- #define DEFAULT_BUFFER 4096
4 @" \+ _0 W5 `2 b2 H - " p* ?+ M. j+ y& q" ^
- int iPort = DEFAULT_PORT;
! B r7 i% o" O - char szAddress[128];& N$ U& l# Z, u2 ~) ?& m+ k
6 W2 J7 o# x5 Q' v! a5 T8 D6 v- DWORD WINAPI ClientThread(LPVOID lpParam)- K& S) i8 _5 [8 \0 m5 W* ~
- {3 w0 u; ?0 l1 B- e f# o
- SOCKET sock=(SOCKET)lpParam;# h z8 j' X" x. E
- char szBuff[DEFAULT_BUFFER];
8 \9 t- w7 M6 ]/ R - int ret;0 M# P% }9 X. q4 {* ?6 Y' ~( H; L
- t9 ~: q( _. P
- while(1)
0 p: ^3 a y- C0 |% f% I - {4 M& q$ ~' x) W
- ret = recv(sock, szBuff, DEFAULT_BUFFER, 0);
+ S$ T' T/ [/ a) ?& ?: C - if (ret == 0)
/ _: `; _* b) l! A - break;
9 H) Y4 T; {" ^ - else if (ret == SOCKET_ERROR)
% ?4 d1 D% N6 }5 m - {: G$ F( E3 V0 m3 x" w
- printf("recv() failed: %d\n", WSAGetLastError());( }+ L3 K; ~6 k2 s7 K3 T
- break;) w( h1 K' w: I) A8 _
- }% [. ?& Z5 y" ~1 a+ T4 r3 g
- szBuff[ret] = '\0';1 L+ a5 p" V; G b+ ~" j
- printf("RECV: '%s'\n", szBuff);5 Y- N3 v* L9 i+ T7 h
- if(strcmp(szBuff,"abc")==0){
1 Z1 b1 n- O9 g - memcpy(szBuff,"Send the correct string!",25);
% A0 {3 a7 z9 w7 Z4 j, R - }
! E' B* s- u7 \. U' O) F* f - else{3 n& r! W8 z2 a
- memcpy(szBuff,"Send the wrong string!",23);3 s5 X! ?, J# Z" F
- }5 i) b& V. T; d1 v" |6 G
- ret = send(sock, szBuff, strlen(szBuff), 0);
5 \0 x: k9 P) m - if (ret == SOCKET_ERROR){
2 `' r2 Y) d/ W& L - printf("send() failed: %d\n", WSAGetLastError());
& {& c2 ]2 p: b4 Q+ @; S4 K+ a - }
* r" S r: U1 i# q% o/ Y4 W - }9 t1 L& \( @/ S" {# x' Z, p8 u. ?* w
- return 0;
% V$ h6 w) S$ }3 \. Q2 h3 y1 W - }$ j3 ^1 O/ J3 Q/ N
# I: Y7 W8 ?' q0 Q6 b- int main(); |% o7 |. ]) t9 A8 v& L* w
- {- H: Q0 X8 F& o2 l& F- l6 b1 r
- WSADATA wsd;; G& j3 q9 Z" d+ j/ V8 R' D
- SOCKET sListen,
8 O; e! t- J3 p, e* P% ^5 q - sClient;+ w) S9 u: {2 A; ^" l/ Y
- int iAddrSize;
! H. \/ I0 C% G) n( @' ?- w - HANDLE hThread;. s6 Y+ Y3 Y/ ]6 C! I
- DWORD dwThreadId;
. A+ y& m8 J# | - struct sockaddr_in local,' N; L& K: f. ?4 T; v' g
- client;3 B F1 O; X3 _: f* T! I
- ^" e) Q3 R5 i+ K' X- if (WSAStartup(MAKEWORD(2,2), &wsd) != 0)
; m; b( f+ m& ^6 ?$ M( k - {
8 K# t0 _9 F: k& B) ?- F5 E - printf("Failed to load Winsock!\n");% n/ `" B9 ]$ P
- return 1;% c5 O, I7 t% U
- }5 r, `3 z g- q2 ^' B
- // Create our listening socket; Y* Z0 r6 }0 r2 j+ K
- sListen = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
+ A9 M" J7 p* F5 e, }- K: ~ - if (sListen == SOCKET_ERROR)
& e1 \0 i8 \* k% G. ]9 p( A) _ - {
& E+ t5 k* z: A" t+ j& x$ [5 F - printf("socket() failed: %d\n", WSAGetLastError());- B0 J6 w+ D' L: x7 F; F
- return 1;
6 v, B6 Q( m, v0 z( K$ n4 X - }7 }, o/ F0 I- A2 Z" r; w$ N
- local.sin_addr.s_addr = htonl(INADDR_ANY);, Y$ P) l2 }1 M
- local.sin_family = AF_INET;& Q. M/ z8 U4 r3 p
- local.sin_port = htons(iPort);" _* `; E3 E, _2 V4 X" _
- ' ?2 R p3 @6 K/ b- n2 f
- if (bind(sListen, (struct sockaddr *)&local,
/ ~; c7 r- L* l r8 ~ - sizeof(local)) == SOCKET_ERROR)+ i% d- y l% E0 w8 z' T @
- {
. [9 y- X$ B+ \9 ?3 w- g8 J5 w - printf("bind() failed: %d\n", WSAGetLastError());" d8 c0 F6 t! B5 g4 z
- return 1;! i$ a x- D: c# w e( s
- }& b" q0 Z$ X5 s& ~- C
- listen(sListen, 8);9 m% {/ g1 R: @5 z) s5 U& p
- // In a continous loop, wait for incoming clients. Once one
/ S- J' n& a1 d8 F! y4 \ - // is detected, create a thread and pass the handle off to it.' H, I* Z* S1 T6 D( \$ u7 w9 a }- A
- while (1)
* i1 O. ~7 [, q6 V9 w+ a - {
D7 a' @4 Q7 X7 W+ L! Q$ b) _ - iAddrSize = sizeof(client);
5 R# F" Q& ~1 b" D" d - sClient = accept(sListen, (struct sockaddr *)&client,+ ]0 w2 E5 K& U
- &iAddrSize);
' a) r) i/ ~9 u5 Q, w3 \4 v' \ - if (sClient == INVALID_SOCKET)
1 P& H, `8 |3 x4 {% I6 J - { & c0 M; [' g2 I! N
- printf("accept() failed: %d\n", WSAGetLastError());( a2 ]0 c( d" j$ q n
- break;
, L6 D& N1 D! d7 X- ?3 @- w- Y - }( A! m6 ?* F8 m" R' V. w
- printf("Accepted client: %s:%d\n",
# y, u# ?! }& x! _/ b - inet_ntoa(client.sin_addr), ntohs(client.sin_port));
2 r* ]1 h# @) A" s" C9 `
/ z) J/ h) p. n4 M. v- a0 w( z2 w/ X- hThread = CreateThread(NULL, 0, ClientThread, l& V' q9 k" \% c* s Z0 F, M! }
- (LPVOID)sClient, 0, &dwThreadId);
, I0 w; d% s2 Y% G* @ - if (hThread == NULL)+ v o, `. @+ J" x9 N w* L0 j* k
- {
/ y9 C& x4 }! u) m. s" j! a - printf("CreateThread() failed: %d\n", GetLastError());
! j- k2 u8 z& m6 h3 \ - break;. ~" z0 j, T9 O3 x m5 t
- }
' E4 \) v4 o! m' w6 X8 u3 u - CloseHandle(hThread);
4 W- j! X8 w/ e7 P9 ]: C1 ]; [ - }* f- B/ e* H2 O8 F& k$ X
- closesocket(sListen);
0 Z1 N6 ^- ~; J, U/ G -
: V- t; C7 h6 V0 [! O' H. Z - WSACleanup(); e7 [8 T) i n0 c0 u/ k
- return 0;, S/ @5 V! [4 C. z' ~
- }
复制代码 7 r4 [1 S; v$ F6 h( C' L- z: l
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