管理员
论坛积分
分
威望 点
贡献值 个
金币 枚
|
沙发
楼主 |
发表于 2020-5-9 01:48:09
|
只看该作者
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.6 N$ _: m% e$ g+ ^4 V, I4 t1 f
- /*client.c*/4 {/ t. i3 f+ a/ m
- #include<netinet/in.h> // for sockaddr_in
" W7 g9 @5 t7 {* q - #include<sys/types.h> // for socket 9 V& ^ T1 K; g; s
- #include<sys/socket.h> // for socket # c! \* J+ m0 T9 i" A
- #include<stdio.h> // for printf & j, q5 h3 y4 F
- #include<stdlib.h> // for exit 5 w% t" @. K% @% g; v$ u7 ~6 d
- #include<string.h> // for bzero
8 [9 M0 A1 v* J; _& n) C# f
5 w2 i. G9 W5 P! r# @. g% I- #define HELLO_WORLD_SERVER_PORT 6666
( l: Y1 o* C; ?* u3 A - #define BUFFER_SIZE 1024 ( l9 H2 a" h. O/ M
- #define FILE_NAME_MAX_SIZE 512
5 Q2 {' W7 I! V: A3 A - % a# l! N# B5 O/ D3 E4 X
- int main(int argc, char **argv) , R, c2 Y& k: x" T
- {
" M5 i5 I. D( R2 k5 c k - if (argc != 2)
+ j$ @( y' v) ?& R: X4 o: ]3 J - { . w1 X- X1 F; D/ k3 l) W) V8 [
- printf("Usage: ./%s ServerIPAddress\n", argv[0]);
, [- r" I2 y: ?- c5 Y, O, s" U - exit(1);
5 l$ P. X$ Y ~ - } # H+ v- _( \' X3 J, z
" ?( i7 n& `% r, Y: b5 K- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口 . c/ s7 f$ T! `$ ~+ j# A: g
- struct sockaddr_in client_addr;
4 F: O: z5 t1 Z& P - bzero(&client_addr, sizeof(client_addr)); , }/ K# c( P6 U; n( j
- client_addr.sin_family = AF_INET; // internet协议族 5 ~% Q3 `- J: g2 Q! [2 Z
- client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址
1 G5 R7 [8 J# L! g - client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口 7 ?6 ?" B. s6 |5 x/ K% ]
* E" ^0 C1 I# y$ J- B2 f" M- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket ' y/ X0 l; @0 U7 K
- int client_socket = socket(AF_INET, SOCK_STREAM, 0); 7 v5 Q/ P3 z- H/ c
- if (client_socket < 0) & I! Z5 r: {* R- J
- {
8 w, I0 Y, @2 {( D0 [1 I - printf("Create Socket Failed!\n"); 7 E' y: i6 m4 n& H8 q1 N# ^
- exit(1);
1 L- W0 l0 \9 Q; u8 a z# [$ ] - } " M0 m$ W. M( [
! s" E9 M6 x m, b' V- // 把客户端的socket和客户端的socket地址结构绑定 - U) Y! D4 Y3 r& F* t: Z! M+ {
- if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr)))
- w) G' H- x4 V. \' h - { ; r" E. \: ]+ U$ Z/ h5 a5 k
- printf("Client Bind Port Failed!\n");
' B8 ?+ j; l: G& W3 t1 d5 R - exit(1); , W1 j# M, Y/ f* h) K- W
- }
: o. r4 _0 b5 z& j4 X3 p - ( V e. j! ]7 `$ U. H# m& ]: h
- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口 ( a' `' e' }( C, n* ~9 p
- struct sockaddr_in server_addr;
Y: x! L4 h, D6 @( C. k0 |6 n - bzero(&server_addr, sizeof(server_addr));
& h0 {6 A c! z9 z# c" d - server_addr.sin_family = AF_INET; 2 X/ |2 I: [; B1 h( q' o
4 }$ |3 j9 m m5 k$ D3 U- // 服务器的IP地址来自程序的参数
2 {" g( c$ Z9 z9 A - if (inet_aton(argv[1], &server_addr.sin_addr) == 0) , A/ ?% N) B! ~9 l9 }7 C2 Z& M
- { 4 W# T* m$ {3 Y6 Q
- printf("Server IP Address Error!\n"); & T% Q% x I& L8 o# `
- exit(1);
0 F$ q( f( `% ^- w - }
! H; U; Q/ d* g' v
! \: x' E+ M- ]2 q; I- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
! Q' `* I3 s0 U - socklen_t server_addr_length = sizeof(server_addr); 9 i( @* Q. V0 F0 c& Y- a
8 G5 \0 J7 @/ ?) J& Q- // 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 - _% G+ _! N$ F& S% @3 l3 ?4 Z! P
- if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0) 8 o' V- L0 c0 B6 E7 S! K
- {
) r$ d2 A0 |2 }: R0 }. X - printf("Can Not Connect To %s!\n", argv[1]);
8 P& Z, u" u" j - exit(1); ! `8 D7 l e) L3 b0 X9 Q
- } ' W- k6 A; x' U7 q& K4 i& [( A
9 P5 Q& m; J! y- char file_name[FILE_NAME_MAX_SIZE + 1]; 9 z, G8 a6 L; O7 ?3 e( E3 u
- bzero(file_name, sizeof(file_name));
! {4 b2 w* u$ w; m - printf("Please Input File Name On Server.\t"); ; ^( `3 L$ \* J- J3 K5 v
- scanf("%s", file_name); 1 Y/ V8 }/ v6 V; k% @
" Y" k' `) z4 u" F- char buffer[BUFFER_SIZE]; & ]' f% M$ |1 u$ c
- bzero(buffer, sizeof(buffer));
8 p" K' U; F+ @ - strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name)); / A% C2 A+ S" N; i
- // 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
' N: _ H( e6 G0 I) V) R1 x - send(client_socket, buffer, BUFFER_SIZE, 0); / h8 g0 @* H p# d# I) i5 Q
. p# v% V: S; O! f- FILE *fp = fopen(file_name, "w"); ) {8 q7 o- X: ]* E6 u
- if (fp == NULL) $ h- H# ^! `- G3 |; F- R$ Z q$ d
- { 5 [- Q$ n: X. m9 y D b
- printf("File:\t%s Can Not Open To Write!\n", file_name); 5 A* N& T+ u8 g, \& q) S/ t
- exit(1);
- o/ j2 {; y2 F& B* w ^8 h. ]7 N - }
" f. J, J$ k! U+ E7 S$ [# c- J - " r8 D$ }( t( @- e4 }
- // 从服务器端接收数据到buffer中 : c p Q+ o/ [+ r% m6 W6 K
- bzero(buffer, sizeof(buffer));
( E0 [$ t4 U7 ?% J$ z - int length = 0;
1 t1 X0 R- M$ V3 i1 K - while(length = recv(client_socket, buffer, BUFFER_SIZE, 0))
4 i5 s. _8 ]# ~+ E - {
$ t ^* Y" t4 k7 Y# y/ n8 q2 u( ` - if (length < 0)
# E, F( N r; O0 q9 {4 b4 V - {
# ^' [" }% l2 o; Y. N7 z' G& @ - printf("Recieve Data From Server %s Failed!\n", argv[1]);
! t v- O0 x" I# o8 B9 e+ O - break;
5 [" }5 l7 B8 p9 n, P8 E - } $ O2 g* U. p7 a( ` G `, F
* }& C& W; C& C# R" i$ J4 j' W- int write_length = fwrite(buffer, sizeof(char), length, fp);
3 n2 O! b0 y( n5 x% g$ P3 t( N - if (write_length < length) " Q2 O- J* m9 I) L& ?5 C! d9 z8 z
- {
5 y, @& j7 J7 u, t+ P2 { - printf("File:\t%s Write Failed!\n", file_name); . N7 y& j7 `) n2 o b
- break; % `4 A. Y5 o* B, ^
- }
6 X: s# ` p) U" R3 x - bzero(buffer, BUFFER_SIZE);
* k) C; S5 C" ], T - } ) D! M. M- ]4 ~ D
/ w- }% k9 b* I- O: Y- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]);
. e" n% D4 c& K1 c2 c
; k& Z% i9 L! B! ]' `, m- // 传输完毕,关闭socket 9 T$ c' U8 p7 z0 f
- fclose(fp);
# ?1 Y3 |. L3 R - close(client_socket);
, Y+ \& \3 O$ Q9 ]& z0 V d+ | - return 0;
7 J3 H" W1 {: N( U; R( R2 J
0 \5 P, l+ }( _' b- } 8 h* e8 K" L" p) H* L( @% f6 m
- 8 q% v }3 r9 k7 B5 z+ n- i9 G
复制代码- /*server.c*/
5 |, z7 y# ?% c9 e; k" M - #include<netinet/in.h>
( L: [6 D3 v Y; y9 @ - #include<sys/types.h>
# B: X6 d, q1 t( c: U) s - #include<sys/socket.h>. u3 l+ N' k. o5 d7 j: z
- #include<stdio.h>8 |* g3 C8 Q+ w4 P2 d
- #include<stdlib.h>8 u8 A4 {* d- y7 h* E$ @
- #include<string.h> e8 A( e8 t8 ^/ t' b3 s
- ; R4 ^ L1 E4 I& T3 F* ?
- #define HELLO_WORLD_SERVER_PORT 6666 //端口号
2 V$ D+ z. P# L - #define LENGTH_OF_LISTEN_QUEUE 20
9 m4 `# c) I4 h$ [9 w% u - #define BUFFER_SIZE 1024' A2 i/ V; `* k8 Q9 ^. ]/ p
- #define FILE_NAME_MAX_SIZE 512
" V7 Q) [, V% G' {: y' b - 5 O9 l% Q+ b& h# n
- int main(int argc, char **argv)3 U9 Z0 o# Z) c+ `, f5 H4 d$ N
- {/ k( ?5 R4 ?5 D/ o( f# Q6 c
- // set socket's address information
7 k! J" Y' d! s2 @/ m! B - // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口5 j$ w! B5 H' J$ l ^; f) r4 O
- struct sockaddr_in server_addr;
4 @, v0 i2 t9 [8 x- o - bzero(&server_addr, sizeof(server_addr));# b* U8 o* V' [8 ^/ N! J# u: O
- server_addr.sin_family = AF_INET;: Y% {7 q6 g, r- s U# A+ ?
- server_addr.sin_addr.s_addr = htons(INADDR_ANY);9 `0 e6 S5 r6 b+ a, L7 s) D+ u
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
* Y8 K, p, K5 @
! A( N; i% S% i5 P, q+ z! K- // create a stream socket" j! F9 ] n0 K- y
- // 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' Q% V, t- l' _" v- ^ |5 E* b
- int server_socket = socket(PF_INET, SOCK_STREAM, 0);; {' q" ^! j" [
- if (server_socket < 0) a, a3 U" v5 P7 P+ ]9 x/ L
- {& C3 R0 w3 u9 c4 C& k+ B) T
- printf("Create Socket Failed!\n");6 O/ A$ s) t+ G4 a& D) y
- exit(1);
, N1 b" _$ r4 t7 J0 M& V - }8 t4 k% u5 M; H4 l+ H( |
8 O8 O" f0 t) `' S/ F* K6 C! ?- // 把socket和socket地址结构绑定/ l: t ~& I6 ` i$ V
- if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))
: N1 l/ n$ X, s% @& k1 @ - {
( f9 V& |+ e+ I! @ m - printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);' t z5 a* q# G1 a
- exit(1);: r+ R) v( C! @ K) r. s
- }6 k& s! G5 |0 C1 K
) {; P$ c8 w, }4 Y; p- // server_socket用于监听
$ h+ Q& k7 Y# G* a. c' v: Z7 i - if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))6 q9 u- ~( O# u
- {
5 J9 w* w3 Y- W( X' }8 b0 G: q - printf("Server Listen Failed!\n"); |7 Z% F" n* Y7 T0 x2 Y' m* p1 q
- exit(1);
/ W6 Z9 W1 R( x7 y! D3 ~ - }% X- E: \0 ~6 y. |2 e2 h6 k- {, p
- ; X! F' ]" b( f. O& D/ Y" V8 ~4 U
- // 服务器端一直运行用以持续为客户端提供服务
7 G0 r8 a5 z5 i - while(1): \4 a8 ]. [9 E, s
- {
! I0 r1 X! N5 b6 N/ x - // 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accept
4 E0 W! x- b+ Q - // 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! d5 T; W- N/ t& \3 z7 Y) T
- struct sockaddr_in client_addr;8 k/ C* q2 j& Q/ H8 B3 l! X
- socklen_t length = sizeof(client_addr);3 H0 ]7 n9 f* ~& S3 X
- T3 H4 `! n2 W$ X: P6 p. C1 b
- // 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7 z5 ^" l- O' K0 y& j% Q2 X- f
- // 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( g% U6 `; L: L0 D. v) \& v
- // 用select()来实现超时检测
4 Z8 p5 c, |5 ] - // 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' m" ?# T0 y& A; @6 j' d
- // 这里的new_server_socket代表了这个通信通道
7 ~( n; L( N0 }; x! W% J+ s - int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);& v) j( T- H' z+ n) s- j# q$ k
- if (new_server_socket < 0); B* h: {& j, a, M
- {
, X w) ^7 X g/ q, w: r - printf("Server Accept Failed!\n");& E- I# m, l& d- u$ n" o, j
- break;+ y6 m' @( {2 y/ e6 q0 n: ?' p
- }- N3 Y9 U C. j6 f' L: _* A. n
- ; G, x5 Z: P4 R/ j& r5 a
- char buffer[BUFFER_SIZE];
% Q( c3 v( s( Y - bzero(buffer, sizeof(buffer));
/ P1 S0 ?: A( Y$ d$ S; a - length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);3 w, d. a* S: a$ Y x
- if (length < 0). |6 o9 R+ o! k
- { u8 v! v9 ^/ h: U- a
- printf("Server Recieve Data Failed!\n");
6 B0 U2 x. `2 k7 q% X5 b - break;
: s! z+ M* E: @9 e" t3 e - }
2 m0 E" u! t" c$ S - 9 m. N- n" K! u- S! b, \& N/ h
- char file_name[FILE_NAME_MAX_SIZE + 1];
9 J+ c6 D2 A# B( x3 T - bzero(file_name, sizeof(file_name));
: y* ~, U4 N5 W' T9 @4 m - strncpy(file_name, buffer,! d+ O3 s) ^9 r g) u' d$ Z
- strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));
3 Y/ _* q$ p. Z* C( B1 B: { - 3 r& ]7 r- G7 E3 O" [
- FILE *fp = fopen(file_name, "r");
3 w6 e6 U, p* U n& O - if (fp == NULL)
0 M/ }- S+ g% p% N* D; _ - {: ^5 U7 w, x. e y$ W8 b
- printf("File:\t%s Not Found!\n", file_name);. e2 w8 @; @& V" |% L9 Z) u8 U8 P
- }: W, R4 k/ c* t9 @
- else
+ [8 V# A" u3 L( p8 T f$ @0 ~/ y4 S& R - {: v2 I8 \/ Q; T# S4 x
- bzero(buffer, BUFFER_SIZE);3 x# }$ P, ?7 S0 h+ A# Z
- int file_block_length = 0;
' [% \- ]; h$ q! A5 b' f7 f - while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)' ^, `& L1 L) O) E3 @5 M; y
- {* S1 N- }1 l6 _3 @: T/ h8 d
- printf("file_block_length = %d\n", file_block_length);3 H; K; O2 d4 y1 u+ w6 d. r, N3 b
( G0 ?( f( _; S V+ g) r- q' O: a- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端$ N- Y/ W! G1 q2 E7 I
- if (send(new_server_socket, buffer, file_block_length, 0) < 0) D& R& {) }( L, I
- {3 I2 n% v8 l/ K. W
- printf("Send File:\t%s Failed!\n", file_name);
2 b1 a: E% q9 B2 D) \" X - break;
; [8 m; u0 B- j# a. g - }) ?% B1 r% [" e" I
0 X" D* P! }. `( K- bzero(buffer, sizeof(buffer));, \: r5 @+ s# _. H) E" N1 p* Q
- }
9 ~. f1 \2 C- _ - fclose(fp); n1 H7 o8 v8 X( `/ I% y, Z5 |
- printf("File:\t%s Transfer Finished!\n", file_name);( K' a& J$ e7 f' f! |+ ~
- }4 b! E3 i7 z. h- q7 M7 ?
- ) n. q6 ]3 d' t/ C
- close(new_server_socket);
% S% Q* J& C; w9 u8 [7 [ t - }* U2 o/ B$ W/ | [
: Z7 J5 E5 y M# N% _ K- close(server_socket);
9 j- l4 C. m- e" b - / |; b- r( F; A. z+ s8 T: o3 Z
- return 0;
* \) S3 }0 m, t - }
9 P4 ?7 E6 w" ~( ^/ W" n8 q, L
; T8 j' u$ W! g( u! a& D- ~1 N
复制代码 , Y0 f3 g* W( U1 T" j
9 ~0 [" n6 f- U7 \6 o
. d& D+ b9 G5 S1 X
" M; X- {2 A& y M |
|