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.
2 E }6 V; S k l- /*client.c*/* e+ `' H# n) X2 U1 n. j4 L
- #include<netinet/in.h> // for sockaddr_in 0 ? _ `4 K: l8 b2 p1 f
- #include<sys/types.h> // for socket
0 [! g9 b9 T# D6 m1 l' y - #include<sys/socket.h> // for socket 5 a' ^4 O, m. p
- #include<stdio.h> // for printf
1 s' p* T" `2 x. P - #include<stdlib.h> // for exit
6 y% }0 ]" i: m9 Q: h1 J# H5 X - #include<string.h> // for bzero 6 a( k/ \; F6 ]' ?* s' W
- # x2 u) n# @! g) V0 ^) h# Q
- #define HELLO_WORLD_SERVER_PORT 6666
$ S" X% E% {7 r- F - #define BUFFER_SIZE 1024
. M7 V; U3 @1 g, q9 i - #define FILE_NAME_MAX_SIZE 512 W3 s4 I4 j) o) y+ X5 J
- 6 v- b; h0 e; L' J: i
- int main(int argc, char **argv)
# X4 P) H+ L8 s y6 h3 r - { 3 T- l6 b9 k+ H# S
- if (argc != 2)
! k$ R* ^5 B4 c' a - { * w3 z* Y6 o# I+ `
- printf("Usage: ./%s ServerIPAddress\n", argv[0]);
0 B9 u0 H9 @8 y0 v6 G1 s) n - exit(1);
+ S0 b3 Q0 ~2 }* [* P7 [' M$ t$ H - }
; t5 w; l- B1 r% v, h - - u) l9 k8 g1 N
- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口 # C( c) b, Y8 N ?6 y1 A9 @+ ~
- struct sockaddr_in client_addr;
1 U0 W `) D5 b, C0 X: V3 h& d( U7 G - bzero(&client_addr, sizeof(client_addr)); ' n+ i9 q+ K3 a. Y( v
- client_addr.sin_family = AF_INET; // internet协议族 1 a, L. I% ]. }4 R. C
- client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址
* M8 c$ X N) ~' D1 i - client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口
$ w+ f& Y% [9 S& Y9 X& U
; G' i1 V( _) a" J8 U4 j, ]- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket : J- K( l. v4 ]* T& \
- int client_socket = socket(AF_INET, SOCK_STREAM, 0);
" n }! \) w* L3 P& S/ n# i/ _- ` - if (client_socket < 0) l0 Y$ I' C8 `; F1 |) c& U
- {
2 E7 I. O( E: c8 u) K8 q. a( r |- Y - printf("Create Socket Failed!\n");
! k) T& Z7 G) U1 P5 W* h+ Q - exit(1);
9 G7 V! V) ~5 O$ p/ _ - } ! M/ p& j# Y6 }, w. L' e
- 7 |: P3 i! \1 i6 r& d0 u/ `
- // 把客户端的socket和客户端的socket地址结构绑定 2 H. e* R: \* a, Y! E
- if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr))) * U3 U- @7 X4 I, E4 P5 \
- { ' Y0 a' p+ Q0 [" n' s( w
- printf("Client Bind Port Failed!\n"); ) @+ {2 y. {* ?" A/ F, b
- exit(1); . c0 Y% r: d/ I" n0 N! a
- } ( | U2 {0 ?0 Z" b( _
- ' P5 D( F K: i4 C. R
- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口 ; c* y' E+ p. E
- struct sockaddr_in server_addr; 4 _/ m# v- }* T5 _% J
- bzero(&server_addr, sizeof(server_addr));
) ]6 O6 p2 l% P - server_addr.sin_family = AF_INET;
6 H; c+ y5 a7 d1 O - 9 K5 ?5 a8 T7 x* X7 n
- // 服务器的IP地址来自程序的参数
+ n, _; ?5 |# Z4 Q - if (inet_aton(argv[1], &server_addr.sin_addr) == 0) ! ]. Y1 H8 p" _1 I5 S! Z1 S4 D1 [. M
- { 1 ~- C7 h- g- m/ r/ q, Z) ^
- printf("Server IP Address Error!\n");
6 k$ `9 f! B9 ^3 q# g9 L7 n - exit(1); # b" b+ s8 ?8 p8 P1 h4 h
- }
' j$ j% P" y' S: ]
* t; y) R: g0 m# R8 D- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); 8 H6 h8 Q0 U5 N% q" k: _
- socklen_t server_addr_length = sizeof(server_addr);
( j+ }1 @2 N( H/ T; G% F, E
/ u: @" W- m: 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
! {4 r8 `7 @4 [ - if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0)
7 a, K" Q; P. }1 T+ P& j3 H; W - { 4 ?% ? y8 z6 H/ ]8 v$ P
- printf("Can Not Connect To %s!\n", argv[1]); # `: ^6 {6 u5 i' j3 D
- exit(1); # o! z$ ]5 Z8 }' B( s2 G0 w
- }
( ^+ k8 e) S# {; q& W - ( B& }; M: K4 ]! s; q3 f
- char file_name[FILE_NAME_MAX_SIZE + 1]; ' y: `" w8 E8 b) g
- bzero(file_name, sizeof(file_name)); ( z) h5 g6 Q8 {/ B4 O; D! q+ w
- printf("Please Input File Name On Server.\t"); % W% r! x1 l% L" ` \; L
- scanf("%s", file_name); 0 X% |2 x0 h* G2 e
% `" `3 Z0 Z/ G) \6 ]- char buffer[BUFFER_SIZE];
' f: p& N2 W4 A1 d - bzero(buffer, sizeof(buffer)); 6 O# d8 M# n4 L+ U- E
- strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name)); 9 E7 f( n; d. H, 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 8 n0 o: ~" [; D
- send(client_socket, buffer, BUFFER_SIZE, 0);
7 z# K7 s9 {+ W9 _+ t - a& z2 d0 l' B* {( m
- FILE *fp = fopen(file_name, "w");
$ y' Q! c* H5 `1 ?4 C/ T+ ]3 n - if (fp == NULL)
8 ^5 x8 U8 _; m, h8 G/ h; q0 \ - {
" L% g5 u8 ?! Q* v* g [- t - printf("File:\t%s Can Not Open To Write!\n", file_name);
! W" X8 _8 H% o" y* { - exit(1);
) e. d8 V V) g9 A2 t - } 2 b( p$ X2 l3 c& O2 c/ k6 q* k+ w. j& l" [
- 4 d f7 R$ a! |5 s
- // 从服务器端接收数据到buffer中
3 _2 I3 y, X9 L, I3 O, P - bzero(buffer, sizeof(buffer));
7 J8 M$ m( l1 _8 ]5 Y) e - int length = 0; 0 Z- {; i7 C8 R& o- H. h1 I* `
- while(length = recv(client_socket, buffer, BUFFER_SIZE, 0)) 0 g; {+ {0 G* |" P; q
- { 2 o' Q1 N6 S5 A6 [3 S' p
- if (length < 0)
& P: n' _6 j, e/ A }! s - {
( m6 \5 Q5 \- r: c1 Y6 N2 H - printf("Recieve Data From Server %s Failed!\n", argv[1]);
" ?, E9 l& F/ ~! ?+ k4 ^. h - break;
# {9 H3 G k9 B& T - } : n3 ^; t! m, n/ g) E& N. Y7 J! V) {" Q2 l
- 4 h% Z- Y( o2 z$ H- Q" l L3 u
- int write_length = fwrite(buffer, sizeof(char), length, fp);
, A7 Z+ S' I I" q - if (write_length < length) ! b1 n+ T+ D, ^" I; s
- { # |6 S: g( j5 ?+ p
- printf("File:\t%s Write Failed!\n", file_name);
+ }. D B- ?: @, P1 L" O - break;
5 Y# p5 O' |/ q/ R3 P1 W - }
" w9 e/ G2 S' O - bzero(buffer, BUFFER_SIZE);
: p, }: Q8 U2 @) e9 B; y' Z - } 0 E* o6 L$ c# f" i
, ?$ e9 u1 ?1 w/ Z- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]);
" b9 O# C: {- K6 f, e. k" W- | - : `! I! F7 n b( E+ m0 \
- // 传输完毕,关闭socket $ C9 I: s4 v/ T3 r" w U) M5 ]
- fclose(fp);
1 a3 w9 ~. Z" W8 G, R - close(client_socket); , k$ P6 u. D: S+ Q
- return 0;
8 j& H p# O+ F! M( c. @
9 N F7 K5 X: z/ B- }
) ^1 I1 c/ t7 s* N/ ~: l
& N% k* p# }' ~: b5 j
复制代码- /*server.c*/" Z- K" _3 H8 e7 y# v5 \$ v# I
- #include<netinet/in.h>8 L. E5 q1 l) H; n
- #include<sys/types.h>0 @: i) j: ?7 b4 x) e+ L4 u- [. V: {# L
- #include<sys/socket.h>0 n0 s+ c) C7 z7 \7 ^
- #include<stdio.h>
7 ?5 U0 f1 p$ t* w1 C9 ^ - #include<stdlib.h>2 G/ i8 a4 L( O: a |/ y
- #include<string.h>
2 d9 ~8 Z* [7 c - 1 s |2 g( b; x" `
- #define HELLO_WORLD_SERVER_PORT 6666 //端口号- s4 Y1 @: W1 `
- #define LENGTH_OF_LISTEN_QUEUE 20% r8 |7 c) e( u: p
- #define BUFFER_SIZE 1024, U& F6 r3 G+ }1 a# f/ T0 G- l
- #define FILE_NAME_MAX_SIZE 5127 B* N9 Q0 e0 t$ L( T' A
- ) [6 P. e, g9 l: c8 W
- int main(int argc, char **argv)
$ I" P1 Q; c A' S9 \, Z - {
+ w% A* l! c, I. v0 E, R& Y - // set socket's address information$ z R( j# ] |& [" y& T
- // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口+ T$ _1 X4 g& L" u+ Q$ l3 C5 X
- struct sockaddr_in server_addr;1 f Z4 o' V) e" f/ }+ d
- bzero(&server_addr, sizeof(server_addr));
" w7 j( {; j# V, b* e - server_addr.sin_family = AF_INET;9 D/ ]2 z4 ~% \; e6 g% M- x
- server_addr.sin_addr.s_addr = htons(INADDR_ANY);5 @8 m! |- k/ n$ @
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
* u! {$ p' r- @/ ?# W
7 j8 V4 e9 @# Q) q" A- // create a stream socket
7 F& p4 e( m3 Q- n - // 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
7 A" A+ i; C3 [2 M E- m0 H1 B - int server_socket = socket(PF_INET, SOCK_STREAM, 0);
$ y% i9 D# U8 b. C9 W% O8 G - if (server_socket < 0)( |4 C: g& R( ^0 l7 j( v {
- {9 J/ v; a! O- i. C; E0 \) S) o; r
- printf("Create Socket Failed!\n");1 A- W. o e1 W* E4 T. h' o! `
- exit(1);" c& R- k. K- N) H7 J$ q2 n5 t1 ~2 p
- }" |1 @7 a. w! L! j A# t
- F& G* @6 s. S, u& _
- // 把socket和socket地址结构绑定) R* m) k2 r& \, A1 j6 O
- if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))6 V* E7 M, H. [: ~9 q' T
- {8 G" x' t( z: b! V: j
- printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);
1 z9 p8 T$ K5 y' j/ h% k - exit(1);5 A! Y6 E, [; r, c$ f
- }0 f4 N/ v6 `* ~7 [
- / U/ r% S5 d" x. ?- w& _
- // server_socket用于监听
" o3 S' m' F0 r3 @! L3 g# x - if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))
! Q" Y+ C* _. \) I) H - {
# K+ a0 j. S/ c, b - printf("Server Listen Failed!\n");4 _+ W; C3 S8 ^2 Q3 m
- exit(1);
9 N4 m, E* r( {1 _* ]; r. D2 S - }: `3 }; f# S6 |
- - D6 Y" e6 g$ _9 R' l |% ~
- // 服务器端一直运行用以持续为客户端提供服务( O7 b' o5 ^* g }; v; ~
- while(1). _$ x0 ]: j- X4 I0 i
- {$ M* @; x& m% i' Y, {5 m0 d
- // 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
. N6 {7 g) N4 m) {6 U* O& P- N - // 接受此请求,同时将client端的地址和端口等信息写入client_addr中, L% C1 I8 s! E! G5 I
- struct sockaddr_in client_addr;
- F3 a' @2 [8 B8 a - socklen_t length = sizeof(client_addr);- i. ^: J$ `6 v1 P1 c
Q. q* h0 \8 o; g$ Q+ v9 F- // 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
, i' }0 O4 ~# V1 r4 X) h - // 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4 L" B( ~9 b* N+ a5 U! ^/ ~, A
- // 用select()来实现超时检测2 A( B# s; l) K* T, A' V
- // 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
" y- s6 o9 ]( J# a; v' s: n& w" v% f - // 这里的new_server_socket代表了这个通信通道: E- \1 B: o. a* n
- int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);9 M! G3 {5 Q0 Y" G6 g7 Z8 N, K
- if (new_server_socket < 0)% O d. B' m4 Y6 O5 h( N3 V
- {) ~( @( h8 T' d7 z
- printf("Server Accept Failed!\n");3 S/ e9 \$ m5 q q4 h7 W6 h* G' N
- break;" I+ K. o8 M; ]
- }
, G1 I: H. I6 S! u" z# w: Q+ Q
- h: l/ h( Q$ \) I8 C H$ p- char buffer[BUFFER_SIZE];
2 W& a$ ^1 e; _ - bzero(buffer, sizeof(buffer));+ _, s$ M; M) |3 J: M
- length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);
& {8 u, Y: B3 t# c - if (length < 0)/ I/ j& w" F4 @7 I! y; A" ^
- {; ^/ c1 U q o' j
- printf("Server Recieve Data Failed!\n");- C, Q" r* B4 z3 Y/ ?& I
- break;
" a7 c- x# M: D& {# R' t7 b6 s - }
: q' p" ]: w- l: ?. b: D2 u# g
z- O/ z- ^0 P T1 C- char file_name[FILE_NAME_MAX_SIZE + 1];& ~' H4 N! q& J
- bzero(file_name, sizeof(file_name));1 x8 ]8 R! I# O( W& p& k
- strncpy(file_name, buffer,
- F1 l2 z T9 H3 s, l- e - strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));( [% [6 R6 {$ ^# \4 g
- . ]8 ?! t1 }/ ^3 E
- FILE *fp = fopen(file_name, "r");
+ J- p7 Z5 D/ a0 W+ Q2 H# m - if (fp == NULL)# A% d, N9 i9 K( R
- {+ u; u2 M2 o! |8 l8 X: \5 n& d
- printf("File:\t%s Not Found!\n", file_name);8 T9 j3 }- e: t0 S4 o% h& b& M
- } {3 S# T7 K; o1 S' b- }; v
- else( B" |' m; _5 T% I% Z4 `
- {/ Y+ O2 h( Q L w4 N& A# x
- bzero(buffer, BUFFER_SIZE);
; m, F# p. i- |0 t4 V* x$ E/ U - int file_block_length = 0;6 ]+ x$ A" L2 M* g4 a! D
- while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)- e/ ~! M0 m) x* U
- {9 e" F o- g5 e) Y6 @4 {3 [6 g
- printf("file_block_length = %d\n", file_block_length);3 a' N) n: Q! C* L
' c6 c4 ?6 V' C- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端* F v* y, x( i! n
- if (send(new_server_socket, buffer, file_block_length, 0) < 0): r9 J6 S2 T9 x: x6 q8 ^
- {
& B7 I* |- D: U" x, D5 D - printf("Send File:\t%s Failed!\n", file_name);
3 d8 _) t6 N% `; w: } - break;
) Q) N3 N7 A7 t; ~ L S - }/ x0 f: @! f) `+ B0 G
6 \0 e7 s! h! ]0 Z6 T$ |- bzero(buffer, sizeof(buffer));
/ h0 x2 X7 P% k, m, |' [& `/ e - }
5 l/ Z3 S1 D! ?9 m - fclose(fp);
9 a& X" M, }% u+ r0 \ - printf("File:\t%s Transfer Finished!\n", file_name);
9 j/ z$ ^4 t1 A0 v) x P% M9 ~7 {/ z - } S, V- Z4 S) {3 X4 x7 t9 q
& y/ \1 e8 C2 u; ~. H4 [- u- close(new_server_socket);
]3 ]5 O) K4 |1 V& ] - }# m9 g! K2 s+ ~- k/ q
- 6 J. O, {2 G3 W( L
- close(server_socket);7 D3 w$ n' E: D1 A+ q- F
- % ], y& x7 h4 g3 P0 n0 t
- return 0;8 f' B J8 o& F9 R" p9 [ S7 u
- }
$ l( Y O# N* I% f
: j0 {. V0 W. E; c
复制代码
h; T& [: H) ]8 e( ^
' C; t O/ W; F* i' B( H. T# s% t6 Y8 b3 j
$ G1 M5 A- K$ O) R
|
|