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发表于 2020-5-9 01:48:09
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服务端启动,客户端通过ip地址连接服务端,然后输入要发送的文件名,发送文件到服务段.; y* g6 ~. @* _$ |4 v
- /*client.c*/
: @" M. |5 F' \, O - #include<netinet/in.h> // for sockaddr_in
' P+ O6 l" e& H' b* ?9 k9 p' A - #include<sys/types.h> // for socket
& x% w& v0 B5 F- s9 n! A ? - #include<sys/socket.h> // for socket
4 l. ?- k, S5 e/ p1 \2 u - #include<stdio.h> // for printf
* c$ q( p! O2 @! L, r - #include<stdlib.h> // for exit & r) H8 Y+ i5 ^* ^7 [' d& C
- #include<string.h> // for bzero " D1 n& H! T) w
4 P4 O2 _7 x; s; M6 r [- #define HELLO_WORLD_SERVER_PORT 6666
& x6 z# ?5 F2 y% m0 ]9 h$ p - #define BUFFER_SIZE 1024 ! j9 ?, x- W& G
- #define FILE_NAME_MAX_SIZE 512 8 G0 F, p8 ~1 L6 n2 H7 F9 T H, U
9 N$ @) t9 L) Z' D$ Z- y3 `- int main(int argc, char **argv) / q M* S6 s4 X1 U( _0 s, @3 m
- { 8 [6 A4 j' X) h1 W' L6 D
- if (argc != 2)
; m9 c u% m" f, o. j# T3 ]: F - { ' w G' B9 R6 S- w& S
- printf("Usage: ./%s ServerIPAddress\n", argv[0]); 5 [. o$ o& L" ^# w0 |4 X
- exit(1); ; d* X& D2 x+ T( W. M
- }
( j9 \" @2 ?4 m$ K, I6 x
$ K, o% D6 }# c" P0 l2 y. U4 l- O, Y8 W* [- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口
) D! ]3 C8 c* P0 L& Z7 L - struct sockaddr_in client_addr;
) c6 F. A/ g! m5 N - bzero(&client_addr, sizeof(client_addr)); - ?% ]* N4 X7 ?% \
- client_addr.sin_family = AF_INET; // internet协议族 $ |) y% Z& d1 }5 |# Y
- client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址
2 k/ T% f% a+ W! F* I - client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口
- c' |' ?8 N$ z- l4 U: v; |9 Z, f
# F6 k* f% \% T: V) L/ f# A2 H- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket
: z: n; i0 [, _% I1 \; k - int client_socket = socket(AF_INET, SOCK_STREAM, 0); 2 X, ?' A( O1 Y0 z, R8 G2 w
- if (client_socket < 0)
' p2 O7 M( i* q - {
& ~1 }, u0 p: R& _ {+ W - printf("Create Socket Failed!\n");
- B+ Q$ e1 p2 I8 s0 H8 \ - exit(1); . T' q8 N$ {5 H
- }
: h5 s6 s. U+ ^) N) s; z8 t
# D# j$ Q( x4 E( M8 I' F& E- // 把客户端的socket和客户端的socket地址结构绑定
' n( h. v" o# D9 G' u. q9 a/ s - if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr)))
4 z' w$ E( F7 G0 d1 Y - {
6 Z0 {. z4 r6 [1 s" l - printf("Client Bind Port Failed!\n");
6 J) i, v# E: {, n; v S - exit(1);
" ^1 P1 i' M# l - } " _( o1 g9 v/ J" j+ F. t
- * X' {5 v7 N: ~
- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口 ; }" Z% G8 K9 s
- struct sockaddr_in server_addr; ' s; X. c8 Y0 b' U: T* Z/ j
- bzero(&server_addr, sizeof(server_addr)); : c9 i' i* O2 u8 a9 t) w: G
- server_addr.sin_family = AF_INET;
4 C9 _$ C& m+ F" U
3 l+ U4 }8 e: U: b" L- // 服务器的IP地址来自程序的参数 ' W$ P, v* v) S. p- r! G/ |5 M0 n
- if (inet_aton(argv[1], &server_addr.sin_addr) == 0) 9 L, C5 `. }+ t( V( {; e% I; r% Z
- {
! w; u/ c" h9 A3 a8 g9 _ - printf("Server IP Address Error!\n"); " q& }4 p" ?7 X
- exit(1);
# Z" k# J! G. M7 I! _ Z. {! x - }
6 r3 `2 D2 h& C7 T: Q2 g) _" G) j - 9 E! V; _4 j: S) P! R
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); % c. Y. n( S1 ]1 \8 s$ ?9 C
- socklen_t server_addr_length = sizeof(server_addr);
) E) ^- l, [ z% G$ Q" w
* _8 [, f6 c# L) w- // 向服务器发起连接请求,连接成功后client_socket代表客户端和服务器端的一个socket连接 , ~5 ~+ _; i1 C- c& j
- if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0)
+ |5 H: _' b) J; v. ^( ]: ~4 ? - { 9 f# t# r S" |$ C" Q# v' T
- printf("Can Not Connect To %s!\n", argv[1]);
# R1 I. u8 B0 j3 A4 V3 } - exit(1); z6 W, N# C5 O5 o
- }
4 x) h2 U6 y9 } - B6 Q3 o2 F( u0 Z# u
- char file_name[FILE_NAME_MAX_SIZE + 1];
: ~, n, _& X% t$ l; b. L, G' q - bzero(file_name, sizeof(file_name));
1 T8 k% ?5 T. [! j# h: w" `' K* ^ c - printf("Please Input File Name On Server.\t");
) k5 \# x5 Z# p - scanf("%s", file_name);
* _# Y( R2 {1 o( T% K" M; j - ) }: d) _) d/ j M$ u% q+ D
- char buffer[BUFFER_SIZE]; : m- g }! R( p! k" z
- bzero(buffer, sizeof(buffer));
$ J \3 h% F0 ? - strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name));
2 M: Y+ c! a) C! r x - // 向服务器发送buffer中的数据,此时buffer中存放的是客户端需要接收的文件的名字
- A. G- q* T) q Z' I - send(client_socket, buffer, BUFFER_SIZE, 0);
& @& q% ]0 h# a# V. q/ d4 H
! e+ V' x k' u# A* p) Y6 e+ |- FILE *fp = fopen(file_name, "w");
0 v. g/ ^ e' S+ ? - if (fp == NULL) * G8 {' t( m, p; X' J
- { 6 a, g8 D ?1 @# M$ P
- printf("File:\t%s Can Not Open To Write!\n", file_name);
9 p$ _+ K2 A4 X, k; _# Z - exit(1);
. W# Z8 I0 T4 n. g) d' p0 u - }
/ k+ G* P$ b& r+ x( l/ g+ N* V% V - 7 C/ Z4 h. g j( r7 P
- // 从服务器端接收数据到buffer中
! A+ g. d, {% I; ]! k( z! R; w V2 i - bzero(buffer, sizeof(buffer)); 9 A# `1 Z% V! S& B4 `
- int length = 0; D7 _' B+ A3 q2 l- Y
- while(length = recv(client_socket, buffer, BUFFER_SIZE, 0))
' b- F, h8 Q: f, ] - {
" W: n( ~3 O1 M: j9 e' ^ - if (length < 0) 6 L. j8 ]& a( o. R
- {
) Q$ \8 X9 n" \* C7 d" f - printf("Recieve Data From Server %s Failed!\n", argv[1]); ( w6 A( }* o, N, p; b# b9 Y; Q4 ]
- break;
; n; ^4 Z# U* j - }
! [9 ]" P) Y0 y4 _ _$ `5 T: u
@' J! K7 [- v0 Z- int write_length = fwrite(buffer, sizeof(char), length, fp); , o2 o$ Q" u; p8 W6 K& I
- if (write_length < length) % p, v3 D- s) |
- { & y" X/ x4 G" s2 `! U# r+ D
- printf("File:\t%s Write Failed!\n", file_name); 6 W. j# {! H" n, Q; f4 l
- break;
" ~) A, f. ]9 L- S; Q% \: d: t+ M - }
5 m, w" U5 O3 p - bzero(buffer, BUFFER_SIZE);
) c% l& I1 W2 D$ c" \ - } 9 @& R1 r9 m% M7 E* k9 \
# q* t* Q5 y. }( m( o; i. w- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]);
- Q2 y5 O9 U3 _! ^: n" h
: u5 C/ N8 Y! B* g" d- // 传输完毕,关闭socket : F1 `) o3 G6 M1 r
- fclose(fp);
0 s7 [) V3 D0 N1 S! r - close(client_socket);
% q4 p, N, Q; m L. a q/ ` - return 0;
9 w# ]4 W- w0 p - ' H1 g* H Q5 O% V! H
- } % Q) g- U7 |& Z( I$ `8 D3 {
: A2 z! f+ `. ~6 a2 `
复制代码- /*server.c*/& K0 H! }! N5 x* Z2 ?7 \0 i8 _% N
- #include<netinet/in.h>( h9 z/ l: P, d' v0 F
- #include<sys/types.h>4 q' z+ l" Y; [- C+ c/ W1 Z/ {
- #include<sys/socket.h>3 z& B. D2 J2 |. n; t4 A
- #include<stdio.h>
; u2 h* B0 D0 v8 \ - #include<stdlib.h> v! B8 Y M- r0 h+ I- E) y
- #include<string.h>
, \% L& \9 o/ v; {# z4 X6 K0 X - 6 b3 a4 \: l, t
- #define HELLO_WORLD_SERVER_PORT 6666 //端口号 t7 q" m% m( j" G5 t
- #define LENGTH_OF_LISTEN_QUEUE 20
2 ~2 v$ [2 t0 u' O) M - #define BUFFER_SIZE 1024+ {8 f# b2 ~+ O) z8 s
- #define FILE_NAME_MAX_SIZE 512
, C- G2 {$ k1 A% {6 h* l2 I" [* Y
. o: ]5 G! ]; V" ], j- G$ N; c- int main(int argc, char **argv)
/ U6 x3 E7 h& J - {& B% a, F9 s) M) h
- // set socket's address information
J# n8 F/ ~$ \2 F7 @9 T - // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口* p% {- i" v/ ?$ D" Z) U" e# @8 V
- struct sockaddr_in server_addr;
5 q( k0 M! o+ ~& j7 t - bzero(&server_addr, sizeof(server_addr));
( E0 e5 g+ ~6 S$ k/ x$ X - server_addr.sin_family = AF_INET;
2 c* m7 B- I7 \/ Q0 G1 c$ r$ ^3 e1 y - server_addr.sin_addr.s_addr = htons(INADDR_ANY);
) v1 g$ E6 H9 U# B q - server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);' @9 l$ d( `/ i! H0 [, K( {
- 1 I h3 `+ _$ V: ^! u$ B: r7 |
- // create a stream socket
. ^% o* p. F3 O& ~6 g1 U/ |4 \ - // 创建用于internet的流协议(TCP)socket,用server_socket代表服务器向客户端提供服务的接口% s0 U+ R7 R8 C: ^! c$ q0 }
- int server_socket = socket(PF_INET, SOCK_STREAM, 0);4 D9 X2 v& ]# a. `. D; I
- if (server_socket < 0)
5 _9 k3 X# I3 D+ O) J% i - {8 x: w+ P+ W: b* n
- printf("Create Socket Failed!\n");
/ ^3 @2 c! Z4 G) k u8 }( y' p - exit(1);
6 s. E5 b; S: H( e( } - }: r# T0 y5 ^; s" o* y9 I+ x7 G3 v7 y
, y, ?' C, @: q3 ?. T- // 把socket和socket地址结构绑定- F' |$ ~9 X8 P
- if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))
2 M* p# S E6 n9 a6 t - {- i! E+ i, T, Z9 L/ i2 C
- printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);
2 s( R% [& W! E4 r8 q0 f - exit(1);( ?0 S8 O9 n2 f$ W. Z" ]- q
- }& K$ [3 o: R, i1 f0 y' N3 P
- * u+ V9 W2 e; Q6 [( b! Z
- // server_socket用于监听8 O* i/ \1 q9 A9 n2 W% z- C- D
- if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))
% y0 C0 L: n" A - {1 i9 g D, M- _# b8 i/ V( Y
- printf("Server Listen Failed!\n");
4 H" C2 a' @, B& }* ?+ { - exit(1);
: V" X+ B) L& u& g - }- n8 @# F& F/ Z) H' |
- + g1 k' s8 z7 v, S/ b7 t
- // 服务器端一直运行用以持续为客户端提供服务
. N" `; `( G5 ^) m. I& [ - while(1)/ [3 \ K) k0 Z" J% r% A: X
- {
$ X) i! a4 X2 K6 T- \ - // 定义客户端的socket地址结构client_addr,当收到来自客户端的请求后,调用accept4 l7 }, s+ g; Y' {. K2 w
- // 接受此请求,同时将client端的地址和端口等信息写入client_addr中. R) Z; |0 W2 Z" ~
- struct sockaddr_in client_addr;
* ]: `' @% R3 \, U' ~2 y - socklen_t length = sizeof(client_addr);7 u. o) V2 x8 c. V9 c: X4 n, J2 Z
6 F" F7 d$ k& t$ ^- // 接受一个从client端到达server端的连接请求,将客户端的信息保存在client_addr中, q" g* L' G, F) Z k
- // 如果没有连接请求,则一直等待直到有连接请求为止,这是accept函数的特性,可以 j3 R" a( o. ^
- // 用select()来实现超时检测! g/ }- v. m' _! y* j8 j
- // accpet返回一个新的socket,这个socket用来与此次连接到server的client进行通信1 J4 r1 C% ]* F$ | {
- // 这里的new_server_socket代表了这个通信通道' I4 g4 z" o& N3 g F, s
- int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);
. A: m; N2 @. W2 i8 s - if (new_server_socket < 0)
; s" H! O6 m1 S! O6 q - {8 P$ ~: j! M, f/ X
- printf("Server Accept Failed!\n");" g! n5 _& S1 [! I& C1 p8 H
- break;
: X7 C, r( b1 @, L$ O S( w - }
/ @ @' }5 j# C9 u
: X8 T* P2 f" U: b; N _3 s- char buffer[BUFFER_SIZE];# `$ r) V5 w6 D6 W6 W1 T8 T0 R( }
- bzero(buffer, sizeof(buffer));7 I* `) a( Z$ V* v" n
- length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);
" U$ M) P1 N4 G: V, m1 t - if (length < 0)0 {' |* N* j U' ?9 u6 F1 o
- {8 a" D% l: t9 ^- M) ?0 y/ L
- printf("Server Recieve Data Failed!\n");
6 @, T0 W$ l$ Z& E( Z8 j) N# O - break;
4 [) E* ]% h( U4 F7 | - }+ T( }( S; q, b% @
- 2 Q/ i% ?5 W, ~9 C
- char file_name[FILE_NAME_MAX_SIZE + 1];
- n7 j3 e2 W N/ }& t/ t - bzero(file_name, sizeof(file_name));
* {+ g/ q/ K; E4 Q) H/ p( ?, k - strncpy(file_name, buffer,+ X. `: ?( H T+ Z9 L
- strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer)); \# [8 Z7 P6 h5 F( _
+ F M$ o3 x" J: h+ M" F4 g+ U$ m- FILE *fp = fopen(file_name, "r");
8 R1 Z8 u, Z+ p0 N - if (fp == NULL)
0 R0 k4 Z5 _$ X8 A - {
" x# S) O1 O/ S! e/ A - printf("File:\t%s Not Found!\n", file_name);
' t8 O3 d% @% }" I - }1 \5 A5 k) H: V5 I% k1 s4 a1 {7 {6 L
- else9 ~: J1 `, `# |# d Z+ b# @7 B
- {7 u! Q' b; u8 m/ c1 x
- bzero(buffer, BUFFER_SIZE);6 ]& Q- {4 C/ t3 i$ ]. Z3 Q
- int file_block_length = 0;
3 b8 s% o' c1 i8 P$ z - while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)
" G: p1 h. U( _6 N$ A7 b; d - {/ ]+ ]! J4 e9 b& S
- printf("file_block_length = %d\n", file_block_length);
+ ^) E o( ~' w j% v1 J: r
8 F8 e; ]2 u7 Z4 l- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端- Z, M! V* O, K1 m' S# d
- if (send(new_server_socket, buffer, file_block_length, 0) < 0)
) G9 ^0 [' P+ c7 H' M8 H, _# i - {
: E; q; w1 a/ t/ T - printf("Send File:\t%s Failed!\n", file_name);7 G$ R% W1 b, m1 d
- break;0 B( ?. I& }. w6 A3 x) |7 c! Q
- }6 p- @' z- i$ c4 [1 Z6 \) e2 R! H
! y& O+ I/ \3 h8 S* A7 u- bzero(buffer, sizeof(buffer));, L7 f+ ^- ]! Z" Z
- }
2 `9 D/ t) y7 H. p3 q7 y0 j ^1 H - fclose(fp);
9 R$ J; d% p; U - printf("File:\t%s Transfer Finished!\n", file_name);' n4 t0 Z8 ? Y( }$ v
- }
7 t! S1 p: H7 J3 P# r - 3 f% D( J1 [4 @, g. x
- close(new_server_socket);
^! U7 h+ s" b6 ]8 K - }5 K4 w( Y6 Q5 A0 c
- ! ~& ]$ d6 a. ?/ X* b P
- close(server_socket);. k: p% i3 E* n( K
' L4 H& M) t% @7 A( |- return 0;
0 G/ @5 z0 {) y f* @: T. o3 q - }
# q5 G- P: l) _. L( h4 k - - @- I$ e5 G3 q4 h( q
复制代码
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