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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( k8 h4 {: r0 k- /*client.c*/1 I5 |4 l/ `2 G- K
- #include<netinet/in.h> // for sockaddr_in ! y: E7 ]; _" K$ @' F- \ v2 Q
- #include<sys/types.h> // for socket , ]: l4 t! |6 y3 N0 D: K) P$ V) @
- #include<sys/socket.h> // for socket 3 |: _: B* O% U" c5 k
- #include<stdio.h> // for printf
0 b. u4 D/ B+ O6 n - #include<stdlib.h> // for exit
8 @3 P& m H9 l, W6 i - #include<string.h> // for bzero
" g0 Q# f. H& O8 U
1 Q/ D$ a7 P- S0 U- #define HELLO_WORLD_SERVER_PORT 6666 2 v' W$ v: U4 H0 |/ {7 q/ S7 |
- #define BUFFER_SIZE 1024
9 z5 a/ A! L9 t, M3 p! b/ O% h/ D% V, Q - #define FILE_NAME_MAX_SIZE 512
0 J2 j! V8 K K$ t. h1 s- i3 ] - + F# ^1 ~: k) R0 |/ I9 t) ]
- int main(int argc, char **argv) 9 _2 @% F! o, \
- { ' b" @/ r O- J
- if (argc != 2)
. S& |7 O# y0 t - {
& Y* V& @0 V1 V# K+ _: j - printf("Usage: ./%s ServerIPAddress\n", argv[0]);
+ O2 |1 n% `3 }2 X0 H( U - exit(1);
: P- Y5 m& C7 j2 f" s/ H7 N - }
# F! p1 `$ i" j - - O7 [# |9 }# M
- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口 3 e( W2 j. O! `% ]; P
- struct sockaddr_in client_addr; 5 o: T8 o, g- D; _: [3 Z8 D
- bzero(&client_addr, sizeof(client_addr));
0 w/ L) w3 a3 b/ |: | - client_addr.sin_family = AF_INET; // internet协议族
: [4 P0 c, ?; O" M& Q! K - client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址 - M( V* |% N2 Y( O/ T
- client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口
4 I" E5 |/ t; a) w - 1 G+ Y# \# b% U/ f5 T$ t
- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket ! m6 U( A0 L2 f; S
- int client_socket = socket(AF_INET, SOCK_STREAM, 0); 0 Q! c; Q' \8 Q! h0 M
- if (client_socket < 0)
1 [3 W8 B# ]% O, F6 i* ` - {
/ J X9 F# G! C0 ^ - printf("Create Socket Failed!\n"); , ?% c1 N# v* P8 A9 m4 p5 S# [% G
- exit(1);
& a3 [! {9 X! a) [8 N; [ - }
* [: W% ?6 s/ J* l) u f3 w
* \- w8 m* }/ g4 G' R3 \- // 把客户端的socket和客户端的socket地址结构绑定 + c( }& }* q' T" M
- if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr)))
# ]$ Z+ k) U; V% S2 F% M7 a2 a3 I - {
8 |( C. y* F/ S5 M M4 z* N - printf("Client Bind Port Failed!\n");
% H0 S# _ d* B& w5 | - exit(1); * F5 E0 ?0 X( }- G
- } 2 w* o3 u0 h# }% U' C M; H
; X8 |# W& p/ D- e3 a' j- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口 5 j" R& P$ |( r% e! s
- struct sockaddr_in server_addr;
9 o- f0 i' `4 \7 B6 p d - bzero(&server_addr, sizeof(server_addr)); 5 x; J/ ?% O: x4 v
- server_addr.sin_family = AF_INET;
* P! I! I! v% k; D
8 n9 T W$ R" i8 G. Z5 g- // 服务器的IP地址来自程序的参数 . X7 {# B2 ]# f8 d G7 B# C% j
- if (inet_aton(argv[1], &server_addr.sin_addr) == 0) ; m* @# F# E( ?! j
- { A( }4 M8 |/ _* I+ l
- printf("Server IP Address Error!\n"); & N8 ~) B1 x" U" f# E$ F) |) ?
- exit(1);
$ `; }6 U, z3 @6 W. t3 F3 | - }
- ~( L! [2 m6 g9 i - 1 u/ N* ` R8 s# @) A! g6 G/ z9 y
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
8 Q" A! R. L4 W - socklen_t server_addr_length = sizeof(server_addr);
$ K4 R) y- v6 L5 q0 K) @0 ] - 0 ~" B. ]' c, H) h5 W/ j- Z9 V8 g: L
- // 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 0 e6 e4 T7 _ E* N
- if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0)
9 y5 e/ g. a+ [1 t- h3 ]; b; p1 _9 ~ - { : |" M+ _4 G; @2 @' c
- printf("Can Not Connect To %s!\n", argv[1]);
% f. z9 _# a9 b; Q) F3 e - exit(1); / d# d: Y+ a1 i* B6 t: y% B8 H9 u
- }
, H# Y/ d7 G3 ~( [% L - # v/ G, h- Q: m6 F# N1 ~1 S
- char file_name[FILE_NAME_MAX_SIZE + 1]; # m& ^8 y0 {3 Z7 @ r) ]
- bzero(file_name, sizeof(file_name));
( I7 l ]( n1 S7 l7 m3 n( Z! L. T - printf("Please Input File Name On Server.\t");
! d0 o# x: M6 {7 x; e - scanf("%s", file_name);
5 N9 s" ]4 p. i8 _/ U - ) j5 o! }- o3 K7 {# K
- char buffer[BUFFER_SIZE];
- y8 Z. C* W/ a7 ^" V$ I, x* F/ f - bzero(buffer, sizeof(buffer));
+ {/ m, s4 P1 E; i' k9 { - strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name)); 8 v& E3 b5 s, x0 q- Y0 u, c7 [9 d
- // 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 # J8 O5 T- t6 I( ^4 ^
- send(client_socket, buffer, BUFFER_SIZE, 0); 1 q, v2 w% Q7 h' [; @2 E
- : [4 @' }3 t, u4 F( a$ U$ u: u
- FILE *fp = fopen(file_name, "w");
, o# N' t8 u" @) ?" M. k" M. j; ` - if (fp == NULL) " W+ M Y0 n' d6 e; B
- {
* _/ i4 |5 }" |0 M+ t - printf("File:\t%s Can Not Open To Write!\n", file_name); + y2 D* Y7 F9 T8 S8 u) }
- exit(1); ! v9 z& m& B/ W( y# W3 |$ W- {2 N, L
- } : @: X8 A2 |+ G0 G% ?( X, T3 y
- ' S/ s5 P% h! s/ N O
- // 从服务器端接收数据到buffer中 " ^0 l( i/ W4 i; \
- bzero(buffer, sizeof(buffer));
. V9 N! R3 U$ ]3 f - int length = 0;
$ M4 h) C/ B$ B! N - while(length = recv(client_socket, buffer, BUFFER_SIZE, 0)) - b! g5 g5 I: F0 R6 r
- {
7 W- d2 `- S& ~# ` K - if (length < 0)
. [ a& \7 i/ x+ X/ ~ - { * z( T7 A) n0 f3 t# e
- printf("Recieve Data From Server %s Failed!\n", argv[1]);
: {1 f5 U m- m0 ?0 [ - break;
; i# o4 s" J( ^2 }, w - } : o3 Q! E. C: f' j; s& g* T3 x
- % H) \9 u) x' s% y3 V6 S* \7 m
- int write_length = fwrite(buffer, sizeof(char), length, fp);
8 t; A+ t I& z* Z! j7 K! E - if (write_length < length) ; R* P1 e$ y& i0 f
- {
, e, ]5 `& A6 w ~. o8 V! c( T - printf("File:\t%s Write Failed!\n", file_name);
& l- ^" P) x4 J" i! r1 M- I - break; ! {, r0 Q4 q$ Y
- } " A) M: T' d( Q0 d9 H% U: C( t8 [4 P
- bzero(buffer, BUFFER_SIZE);
% V0 x- `( r7 R& V# | - } 4 G0 T6 X& c+ o- R
( U) y! R/ k4 E: Q% y% L% K- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]); 2 V6 R% v7 z" U; x. C7 ^
- 8 g; G( Y9 a# ]5 f( ^
- // 传输完毕,关闭socket
/ V% C3 u- p, ^0 K- \ - fclose(fp);
" w: A2 _% i- V' D3 E8 F - close(client_socket);
- W1 a# H: a# h k% I2 L - return 0; * v7 Y V: K# j% F4 H" v
- / t/ ~. b- `7 U
- } B N! W! Z/ N' e
- / ]: N: S9 L7 k
复制代码- /*server.c*/. N5 [7 b2 R# B3 V3 Z
- #include<netinet/in.h>9 Q! o. o3 x" d! a" a8 T2 o
- #include<sys/types.h>5 z5 N Q# J! H- B1 j
- #include<sys/socket.h>
+ W8 _& z: b$ h; W - #include<stdio.h>
% l* k) L5 b) I! v2 h - #include<stdlib.h>
" Z& z" o h; j. y - #include<string.h>! c/ D: L6 C3 S. r7 g5 Z; m v( `
- 4 n5 J' b1 n0 R$ ]- U# Y0 U
- #define HELLO_WORLD_SERVER_PORT 6666 //端口号# ~- {6 j$ B3 @5 P
- #define LENGTH_OF_LISTEN_QUEUE 20
. ]* O# k9 n: c& {1 N& G - #define BUFFER_SIZE 1024
: \& [& M! i0 P - #define FILE_NAME_MAX_SIZE 512
$ ~; T" _" f! ]1 e/ b1 j* y3 A6 y
3 x7 [4 `$ S# s i- int main(int argc, char **argv)& ^, u: U# F. C
- {5 H! z5 H& X: a. N
- // set socket's address information
& r( [( }7 Q5 l& {$ l - // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口, M/ I$ `% f! M" `4 ^& u' l m
- struct sockaddr_in server_addr;8 L5 E* ]: n8 D' x4 W5 j/ V6 Z( v
- bzero(&server_addr, sizeof(server_addr));; h) W9 G' C8 ]1 }
- server_addr.sin_family = AF_INET;+ g% W! |7 E1 o! W( z' r R- A9 B5 }
- server_addr.sin_addr.s_addr = htons(INADDR_ANY);
/ a" v, W9 b g* z; r, |6 b2 e - server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);8 E/ }) M4 @7 I5 N" K
- * @5 g! x$ v# |3 }4 X
- // create a stream socket
; c7 J$ V8 \9 x# n. t( h - // 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. Z+ O7 d& k4 M& V
- int server_socket = socket(PF_INET, SOCK_STREAM, 0);
3 T. l# W6 Y) w2 X9 L6 g9 w - if (server_socket < 0)$ X F3 [2 _& a- f
- {4 ^: z5 s# i0 K- q1 H
- printf("Create Socket Failed!\n");9 \0 K( I/ X. [
- exit(1);0 T; K- j( J+ `1 I2 w- S% o
- }
/ d" g) z2 }: L - 3 a( I/ j }! D( M! i
- // 把socket和socket地址结构绑定
- U/ |0 F0 V6 a2 I6 C. z2 O - if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))
5 f. _& V) p O - {# k3 E8 S1 @& k. @
- printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);) x1 M3 ?' W* M$ E Z
- exit(1);
2 J; F6 H' j" h& c/ n5 _: C3 C) b: [ - }, K7 W8 i6 M8 |& {$ l9 w6 u/ W$ \
* F& Q$ u) i6 S3 `3 }5 O2 b- // server_socket用于监听- ^: X+ ~$ _4 p3 w& N4 h, @
- if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))9 P- q) K) Y Y7 S. [
- {+ q: y# i# L; d' v* L, M" z0 j6 U
- printf("Server Listen Failed!\n");
8 a8 R% M( c+ ]! ]; ~0 i - exit(1);
9 P- J" D7 t3 x# V9 H) {9 C0 ~ - }1 T f9 y2 Y: A Z$ w" v* v5 h
+ h2 z% a3 }& J2 o* P' ]- // 服务器端一直运行用以持续为客户端提供服务
% \3 Q4 {! {/ Y - while(1)
4 X, W9 L/ m+ p - {
6 Y0 q& k, U' {8 L - // 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
3 a3 y, y9 n, g0 N+ E7 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+ B/ p, s$ N3 X' j: m* r" I
- struct sockaddr_in client_addr;
- x6 C9 Y6 S" i Y) @3 W - socklen_t length = sizeof(client_addr);$ D: F. P% M, |
7 y: @$ }9 u, G3 o3 e- // 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, r, Y6 H$ Z4 G2 a1 d {" b: 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
$ x1 i) \% U; G) L - // 用select()来实现超时检测" b" x `- Z! ~* X
- // 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
" x, s- _7 g4 L& Z7 ^" [" m - // 这里的new_server_socket代表了这个通信通道) O5 p$ U, s& U
- int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);
) A6 J" O4 a% u/ T8 F8 y% n - if (new_server_socket < 0)( _% p6 i% {9 I$ M
- {
\% V( M! @% k - printf("Server Accept Failed!\n");
, s8 u; A$ I- ~* T, f. d/ A - break;. F" G7 q. P" E, W
- }& Y! M- }7 p( m/ N
' o6 L9 ^2 W+ J$ ]0 G- char buffer[BUFFER_SIZE];
3 y4 z2 [- Q6 w; o$ t& f& D - bzero(buffer, sizeof(buffer));) D' l- c: E7 |
- length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);) H( G# g7 ~# ?9 J. r$ t+ z1 C
- if (length < 0)
- s; v/ [1 P. W3 \8 ] - {
6 O1 Y1 E+ ?; U& N& h3 t6 R) ` - printf("Server Recieve Data Failed!\n");+ D' G8 }4 b# j' Y
- break;
# @8 x5 C% Q* u) o& i% [* h - }
! u: z' V% z$ S! C1 y$ o! Y
: E: B! k$ m) u9 R, a- char file_name[FILE_NAME_MAX_SIZE + 1];& y7 Y" L- `. V+ y; H. J0 j
- bzero(file_name, sizeof(file_name));7 f/ e/ x( i# {% E0 S
- strncpy(file_name, buffer,- Z. s( V; n; e( W7 L
- strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));! G1 ^8 U0 Q% J5 {$ N0 C
- 3 d* ^) L! z& b2 Y7 V6 m
- FILE *fp = fopen(file_name, "r");
/ [2 {6 _1 U" j, N: Q% w - if (fp == NULL)
. @& D" V N5 B7 l/ e9 S - {
; c8 l6 N% u! x/ G. l# } - printf("File:\t%s Not Found!\n", file_name);. {' g0 |$ p9 }" l
- }# O) n$ E ] m2 V' o5 m
- else0 T2 `0 Z' e4 @& P5 _# r
- {
7 D/ _6 q1 j L% ]. O+ u8 k0 K3 r - bzero(buffer, BUFFER_SIZE);
6 e& k: x$ ]" k1 U) _% j& F! u" J - int file_block_length = 0;
& E! N0 k$ R& i% I, C2 [ - while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)
' d4 W" E& x1 d( B1 l$ h - {
0 I: Y$ T7 d, V- u% { - printf("file_block_length = %d\n", file_block_length);
3 X5 O# D9 [' \9 F! n- ]7 V/ _ - 2 E' @" }# f* ^& ?1 K( ^
- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端
0 ?0 K5 y. Z2 r6 C4 [. ]' b* S - if (send(new_server_socket, buffer, file_block_length, 0) < 0): n1 g" H9 t0 T+ q y% S+ X: Y* \+ u' O
- {, Y; M! j& X. s- @3 O; T
- printf("Send File:\t%s Failed!\n", file_name);
6 Q+ O6 v1 j; }" A8 f$ y - break;9 ?' R' c5 H6 l. U% G
- }
9 S2 e" O# ^, [/ _% c8 U3 V - * S; }4 t& u1 Z# F5 g1 c" c" f2 G8 @
- bzero(buffer, sizeof(buffer));6 X: b& y) r% N* r) Y. x
- }: y4 V9 h6 ^- B8 [! I4 n4 J# h
- fclose(fp);
; c2 {1 u$ _. g% E& h$ W7 q) D0 | - printf("File:\t%s Transfer Finished!\n", file_name);) C/ N0 h: w/ o: }
- }
3 y9 \0 U6 C7 \
- B9 g4 p. a9 t4 o$ \3 o* E7 Z/ P- close(new_server_socket);9 S, i' \; r5 ?' {& X4 B) c, J7 U
- }3 D) g$ X0 p$ C8 x& B
- 7 p' ?# {. `% E; _8 t* ?! q2 f
- close(server_socket);3 \( a0 t9 ]0 C8 s
- ' n* f! Z5 b! u( V$ T( b
- return 0;
) e% r% V6 r& ? - }
* ]+ ?- A2 S# t! ]+ ^8 w
+ B) @( z. \5 s( C
复制代码
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