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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.
% X2 T, n+ S5 Q) V6 v s! e7 b8 f. S- /*client.c*/
1 m( P4 j# |' i - #include<netinet/in.h> // for sockaddr_in ( f4 L3 x3 ]: ` Y8 l/ O
- #include<sys/types.h> // for socket
, L" Z& v" z2 l% t0 u - #include<sys/socket.h> // for socket , x0 u" N2 y! z/ v7 b- V ] {
- #include<stdio.h> // for printf ) Z, k3 x2 h4 X6 ^- @
- #include<stdlib.h> // for exit
3 y% v# u0 x" \, d$ [5 | - #include<string.h> // for bzero 2 P3 W7 D2 O6 D# I
5 s& Z0 O) _0 o- #define HELLO_WORLD_SERVER_PORT 6666 & V8 R6 B6 Q! u+ I) Z0 O! i
- #define BUFFER_SIZE 1024
) C, x; W8 L; c- f- x - #define FILE_NAME_MAX_SIZE 512 + B* C g# r5 K" ^) F4 W0 f
- ; T" N' e# y2 r2 }' D
- int main(int argc, char **argv) ) C2 {" ~3 a. B7 z0 l/ O( u
- { $ C1 U4 Y( k: m6 ` s
- if (argc != 2) ! g9 K& G4 X/ T4 n
- { ! @+ ?$ J7 H9 C
- printf("Usage: ./%s ServerIPAddress\n", argv[0]); . J0 Q* Z3 S! a/ @1 b; ~% V: R
- exit(1);
/ S7 _' r |7 r4 o8 U - } 7 i# b! I! S) X5 v: L' Q
- j" j* k( r9 B \ b/ C
- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口 , r& X0 W6 {) X9 j8 u# f
- struct sockaddr_in client_addr;
3 K1 g/ b! J" o. H v, l* ]8 F& l - bzero(&client_addr, sizeof(client_addr));
5 {; q5 l; T. Q9 j - client_addr.sin_family = AF_INET; // internet协议族
2 e9 c# G& i/ ]9 M1 U' G - client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址 $ |. ^6 f3 B$ S' T" I6 k! ?
- client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口 / F3 {) i1 z9 X2 m
5 b# k7 j9 P- }1 [7 R- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket
, @' n- R I- s: J+ @# L- G, f, | - int client_socket = socket(AF_INET, SOCK_STREAM, 0);
2 \2 d8 Y- T D. ~ - if (client_socket < 0)
1 v( ^+ }8 @3 F; b" w4 @& i - { 1 S% n v9 p& ]
- printf("Create Socket Failed!\n"); 6 A( ]$ E, B8 f9 m8 k
- exit(1); 8 t) b( w8 s( Y5 W' o0 g
- } 2 b& z6 \1 K. h/ p
; X& Q) t- T* K5 O- t- // 把客户端的socket和客户端的socket地址结构绑定 # v5 W, M& `' K
- if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr))) & A6 {" _; E0 W8 ]2 p: f; w
- {
& [& U! i, w$ g' r8 n - printf("Client Bind Port Failed!\n");
5 l/ [8 @4 ^+ m; J. | z - exit(1); & j* s& W' `( W% z6 s4 \7 F" S
- }
. M. C- q+ [! |1 j+ b" k5 T
6 D7 P5 ^ z( J- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口 0 p: V2 E t2 ~3 O5 [! o5 K/ O
- struct sockaddr_in server_addr;
5 t$ u3 Q; n4 T0 n! x7 m4 x; e - bzero(&server_addr, sizeof(server_addr)); ! `" d4 q2 d- ]6 v5 m
- server_addr.sin_family = AF_INET; : M0 G' P s3 ~: Q
- + ~; V, d+ ^- ~3 j) j$ T. _
- // 服务器的IP地址来自程序的参数 3 ]7 w4 a6 D8 \2 r- _6 j
- if (inet_aton(argv[1], &server_addr.sin_addr) == 0) 4 l: N. ?& ~( k3 I/ h6 k' ^( m' A
- {
. B" R5 A5 U1 x4 F7 P. @ - printf("Server IP Address Error!\n"); ) P D, |- ^2 }9 q) C% p
- exit(1); ]' g; N$ S* K
- } 9 A! K- ?- s$ X- p! R
F8 s9 q. j% v I& j; Y6 |& ^- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); . N# o: {9 e6 b( ^( F: Y: \
- socklen_t server_addr_length = sizeof(server_addr);
, K/ o2 L. R8 x5 n7 t2 g( H
* k- q- k8 y6 @* t( o( H- // 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 3 G' E7 T* X$ j. P5 I) _! K: z# f
- if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0) + r% `1 K( S5 n" `2 o0 u
- { 6 ]" y$ |+ i( A) x* i
- printf("Can Not Connect To %s!\n", argv[1]); 0 q8 w5 ]9 f# t
- exit(1); 5 P( N/ k: T. T8 v! {
- } $ c# h, T2 y8 W" ?2 B4 q H, k/ V4 i+ j
- & {' p* ^9 v$ T+ R; t: ~7 R
- char file_name[FILE_NAME_MAX_SIZE + 1];
1 z" L) Y# E/ l! W: [3 h% r) ~9 I - bzero(file_name, sizeof(file_name)); 3 u7 k1 u& G( n* g
- printf("Please Input File Name On Server.\t"); : n* E$ { r) R& p
- scanf("%s", file_name);
N5 j7 W3 J8 K7 b/ l
0 I3 s8 M8 D# p; `2 g0 r- char buffer[BUFFER_SIZE];
7 h; S6 I3 P q" X R+ U - bzero(buffer, sizeof(buffer));
9 H" A9 F! H0 N+ [& p - strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name));
) r; S! v& V5 m: c: ]2 C* N. z - // 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
- H8 N9 S8 y" F4 m6 ]' X, r; I, m - send(client_socket, buffer, BUFFER_SIZE, 0); * m2 }- ^ F& q
- 1 C4 ]( T& m6 r, x2 X0 K
- FILE *fp = fopen(file_name, "w");
7 B* p8 k! _+ O# Y: \ - if (fp == NULL)
0 [, I! _) z3 K! X - {
3 E9 O3 J4 ~0 E - printf("File:\t%s Can Not Open To Write!\n", file_name); ; ?, z9 M1 j: R8 n# B( l0 U2 L5 K
- exit(1); ' Y% s* T* f6 ~7 O' Q
- }
5 A. t/ m. {! |" x( N. s7 v$ h
" D; O2 b8 q, H& X- o- // 从服务器端接收数据到buffer中 % J: ?0 H) I7 O- x: I' [7 m
- bzero(buffer, sizeof(buffer)); " X) E& C6 C- `/ A& ?* n" ^9 V
- int length = 0;
1 |) t/ F) y5 D- X# H - while(length = recv(client_socket, buffer, BUFFER_SIZE, 0)) 6 d% ~1 y$ G, H
- { t& q7 I. R* Q5 B k; y
- if (length < 0) $ f9 C# \0 w9 }. G
- { $ E- p; Z3 y9 F# \
- printf("Recieve Data From Server %s Failed!\n", argv[1]); 1 `; r( @! I6 H& I' Q
- break; 6 L5 ^- t# t# u% t5 o# E! O$ o
- }
" X5 J& f; R6 S. {6 Q7 i/ d
$ @, Q5 F3 Y6 j' |# c- int write_length = fwrite(buffer, sizeof(char), length, fp); , e' E4 P# K- M0 a
- if (write_length < length) 6 @) t1 Y5 p7 @2 N
- {
' ], U/ z, x/ o - printf("File:\t%s Write Failed!\n", file_name); V3 I, _' W! Q
- break;
3 o# k6 v4 A. `3 |8 p+ u1 t - }
8 K8 T- u& j+ j R0 b- _ - bzero(buffer, BUFFER_SIZE); * X4 u6 s7 {6 M) ~1 I" A
- } , P& X$ q, @. T5 h' `' o
- ! x7 W, E( O$ l' y$ Q" w `
- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]); 1 U: v& T6 D i
4 s- n8 h! I x! _- // 传输完毕,关闭socket : w+ k& Y' ^- i; e# y, P3 Y
- fclose(fp); 1 F9 W9 H; H0 {) M* @, i4 y
- close(client_socket); $ t ^4 F( s3 S4 Z* ^4 R
- return 0;
; M/ f+ E; s+ w
/ Q+ A1 t6 W: u B R- }
4 P+ U% b% q. j3 n J8 B - O+ D) d; d( [0 A; I( h! E
复制代码- /*server.c*/
) I9 d& Z9 N" o/ R7 ] - #include<netinet/in.h>, Y( Z* ]- I* g! f% X
- #include<sys/types.h>
% _2 ~" j5 h" n2 e - #include<sys/socket.h>
. |2 K. e) ~! |+ _/ ~& @ - #include<stdio.h>1 d7 @+ D) ]' Y, i
- #include<stdlib.h>0 `, C. {/ w" Q l# l8 L6 a$ n8 N
- #include<string.h>
3 U% [1 e0 a# a3 S* ^
9 q- g" n3 a! l8 k8 b2 E- #define HELLO_WORLD_SERVER_PORT 6666 //端口号
# A# Z$ U) O8 I/ s, N: Y7 o - #define LENGTH_OF_LISTEN_QUEUE 20
7 g5 Q% p d9 U o* f& W. e+ [, l - #define BUFFER_SIZE 10245 ]- Q: i5 ] p8 T! q7 ~
- #define FILE_NAME_MAX_SIZE 512$ a/ M( q) N D! a: _4 ~4 k
9 j4 K. u6 N! P. d2 @- int main(int argc, char **argv)
" R' p$ _ A2 \/ U2 B - {6 @' j0 Z. T: z5 A
- // set socket's address information
% q. K" p" \. K% x) j - // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口$ s, O+ b6 A0 F/ ]. \. o
- struct sockaddr_in server_addr;7 @ L2 p" [; Y, u% u
- bzero(&server_addr, sizeof(server_addr));
) v. ]% o9 t+ z% a" T. \ - server_addr.sin_family = AF_INET;
L& C% v! X q8 b) { - server_addr.sin_addr.s_addr = htons(INADDR_ANY);* K( K5 E, I. V5 K
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);2 e- h" V q1 |2 i
- ) K0 _6 V6 K2 B: X
- // create a stream socket
3 ]4 S+ J8 L5 Z: E; e8 e! V) G - // 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- F) V! I. [' ^0 U4 w' a4 n1 N
- int server_socket = socket(PF_INET, SOCK_STREAM, 0);
# p' k' R a, b8 h& b$ H - if (server_socket < 0)
' l) `2 a- h$ M4 f( \1 M - {6 T* ^% X" q, }; d0 h! m, ]
- printf("Create Socket Failed!\n");1 N: a7 V4 J- B0 q
- exit(1);
9 e2 ]7 C' F% i& [" M' ~ - }
6 ]; O% k4 M/ U0 D) Y, @- X
1 p' [* x* B- @- // 把socket和socket地址结构绑定
3 U1 D" {1 s3 ~! }3 @0 D - if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))* a P4 f! H% B
- {
5 Y* w! V; b1 G5 X2 T$ @+ c% F; F - printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);! t% k A- ?$ `. j
- exit(1);0 H' K2 U; N. X
- }
1 w, e, Y: b) `7 C% q
" |6 ?% K1 }; {) b# V4 X- // server_socket用于监听9 K0 J* Q! A( {! p6 l4 f
- if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))
, F1 A; F# }2 A- Q* z1 s: U; g) w - {! x8 w# Q0 V4 [% Q; H: w1 x
- printf("Server Listen Failed!\n");. k& d( `1 Y* `" L4 p* a: q1 a
- exit(1);
" y- C2 m5 A" l0 B4 Q2 b. O - }
- t7 z7 i. ]8 S& R& s9 M - 3 D1 a2 ]& J+ ^
- // 服务器端一直运行用以持续为客户端提供服务
6 E2 _$ W. P4 ~7 Y s' f( \6 P& T - while(1)
; |# h0 ]3 q, ^" ^ - {
5 A: A; d, s! o* x1 g* \) F - // 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
; A) s# T0 u4 t. u$ z1 M7 s - // 接受此请求,同时将client端的地址和端口等信息写入client_addr中
5 z5 ~# u3 Y" D! }2 i6 Y - struct sockaddr_in client_addr;( J+ ]* n m L
- socklen_t length = sizeof(client_addr);+ T5 }: x5 s3 R9 }6 w4 f$ N% i
! u% s8 p) i& g' M' x- // 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, t! u' J) E* a9 K% E$ d- p
- // 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/ k2 v5 {1 a+ q9 z0 j/ b' R! p1 _
- // 用select()来实现超时检测' \( u7 v- e2 Z- M* {: ~% C
- // 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7 Y; Y0 U3 @ i8 p
- // 这里的new_server_socket代表了这个通信通道: a! A) v3 q) @4 Q, o. J8 s( T3 e
- int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);" k9 q9 u/ @1 a: Z3 Z
- if (new_server_socket < 0)
4 x! K# `/ l# }' b - {3 r4 b% `! a$ l2 l* \# p1 T" I& {$ v
- printf("Server Accept Failed!\n");0 h3 q$ \6 T( z
- break;( Q9 |# V$ K: J
- }: F% i# U, N2 }4 p/ v
' w" X- P, C% v9 a6 {. e; T2 v- char buffer[BUFFER_SIZE];
$ O# j v6 ~+ w( j& {3 _5 E p) t) r- i - bzero(buffer, sizeof(buffer));
( G; N0 y- \" q0 L$ t: i - length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);
9 x! a) x0 s8 | - if (length < 0)! {9 A: Q1 ~( ^
- {3 x2 Z( F2 I8 L; g: c
- printf("Server Recieve Data Failed!\n");
2 K/ Y. S7 `' B5 K8 p - break;
* e3 I* w" o" B) G- l8 p* v - }7 F( ?+ N8 @7 V9 ?
& ^2 o9 v+ U, P/ V5 k. ?- char file_name[FILE_NAME_MAX_SIZE + 1];
6 r7 i9 ^7 E$ T% ~+ R+ ?! `$ R - bzero(file_name, sizeof(file_name));. z) N) R% [+ S. p
- strncpy(file_name, buffer,( E8 E! T/ B( X& y/ @
- strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));
4 P. t. Y! c' ?4 P1 ^, c& w) W5 |& p - % L3 b% S& g. S1 g" w
- FILE *fp = fopen(file_name, "r");
b! X' c: I* J0 ]$ f) Q- M7 Z0 C - if (fp == NULL)* a& t& S4 ~/ h: ^& K p" t
- {
& M5 ]" f, i) Q - printf("File:\t%s Not Found!\n", file_name);+ F5 e; B+ \ z/ d* |- b
- }
2 l4 l0 |9 C U* @4 W4 B - else
- F& f+ x, X% Y6 P+ s& p, \3 i - {9 a6 E2 x8 v9 u3 U7 i
- bzero(buffer, BUFFER_SIZE);
3 J4 h+ \% {, y" n) R - int file_block_length = 0;% M- U) o: g" P8 ^6 t# p
- while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)" V2 R$ y0 w# _
- {4 P1 L( V' Y: ] G" Y
- printf("file_block_length = %d\n", file_block_length);
; ^( A0 P! ]0 w - 3 M( P6 r5 V4 Q% N5 x$ y' M
- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端5 |) p' \& L, A8 z6 e& v% {6 {) |
- if (send(new_server_socket, buffer, file_block_length, 0) < 0)
' k7 ^% i9 W% n9 }& d; ] - {8 } q: _$ m4 b
- printf("Send File:\t%s Failed!\n", file_name);
/ a- y4 {2 _/ Z. q/ f/ N) u - break;
0 S) L ~) k& ^4 ~+ \ - }
( o- }- Q2 p9 }( c
8 e( }" C: ?; o5 t9 ?& Q- bzero(buffer, sizeof(buffer));
" @: U# K' n4 m) O - } i% ?# K# T) ^
- fclose(fp);# z4 H$ m* Q6 s" L S
- printf("File:\t%s Transfer Finished!\n", file_name);
2 M! w! [6 @* p - }
! L+ l& ^" l" j- _6 s+ R
# b0 l3 }% b8 k1 K8 O7 S- close(new_server_socket);
3 V& [' K" b2 z" M, k) K% @% } - }
2 w$ e; l5 [; p& x
0 q1 A/ d- A/ E- close(server_socket);
( j5 O* ?# C( M( A! G! O( F
' a- k5 s( ^ }. G; i- return 0;
. k& D/ o: z. r( V, r$ k* a6 ^4 } - }
% F: N& K# L7 y; ~/ A- Z x
9 p5 A( h5 h% T0 t8 G4 S1 P
复制代码 & z. }" B$ ~# R$ I# M6 }
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