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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.3 |5 J4 }* u: @+ J: @3 ~0 @$ x3 O
- /*client.c*/: c/ h+ G! m8 v* s
- #include<netinet/in.h> // for sockaddr_in % |1 F* X- y0 o, h
- #include<sys/types.h> // for socket
* d- ?6 ^& r8 `: s/ Q. W& h2 K - #include<sys/socket.h> // for socket
) A5 A) K5 I# B4 p2 } - #include<stdio.h> // for printf
, u; F4 l' k: |6 p3 R5 } - #include<stdlib.h> // for exit
( U0 N( n5 K1 D8 [+ p" z( s - #include<string.h> // for bzero ( I1 C3 U: ^: I0 q
( ~1 `% z- g% s; O6 _1 Q, s- #define HELLO_WORLD_SERVER_PORT 6666 3 ~9 g7 J2 X1 R+ S( X! s% f1 F
- #define BUFFER_SIZE 1024 * ], x0 u! o2 ]/ s
- #define FILE_NAME_MAX_SIZE 512 - _4 X& E1 _: C) c, ^+ F
|! a! P& Y' o. [9 h- int main(int argc, char **argv) & v5 y5 A3 q, c' z4 L5 }; U$ W
- {
! l8 M$ w3 A4 V+ Q$ P) Y; l2 G - if (argc != 2)
+ z6 Z! d5 a8 P/ A! _- I; O - { " |. P; m& U* U% g. _" ?
- printf("Usage: ./%s ServerIPAddress\n", argv[0]);
! Z/ k& p, {; [; V - exit(1); 2 _6 `9 P9 N7 Y
- } % z# n" \6 ?7 k- T) Y1 _
- $ {! p3 k1 z: z2 c
- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口 ( V- s+ r2 P! Z) \4 M3 |- C: n, ?( Z
- struct sockaddr_in client_addr; " `7 c4 a. U& R3 |+ p, ]
- bzero(&client_addr, sizeof(client_addr));
/ o; [% S: i) o6 k$ L# O - client_addr.sin_family = AF_INET; // internet协议族
) N4 \4 x f7 l - client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址 ) M7 s8 Z, F0 w" T/ J* u$ h9 e- \
- client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口
/ e, M- r) F: o2 G9 x - h# s+ i3 n) E9 ?: \7 |
- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket - W+ ?& @0 T* _( }2 Y% a1 C- I9 }
- int client_socket = socket(AF_INET, SOCK_STREAM, 0);
9 Z( P" q4 X w( [' U7 B - if (client_socket < 0) 8 K6 y5 d4 Z8 {0 _- c
- {
. g& Q1 I% g- }' p+ e+ O7 a - printf("Create Socket Failed!\n"); 0 v6 i# f) A0 Q$ p7 [% P
- exit(1); ) k" D1 p. v- T
- }
! j$ U4 H+ W# b( Y- i: M
& }7 R& T' j( D/ X) S- // 把客户端的socket和客户端的socket地址结构绑定 5 [2 f6 T3 J5 R3 |; z, F% Q4 R8 e
- if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr))) 0 y& @2 ?: S0 G* K
- { 1 F5 u! {4 v4 |8 A6 D p* d
- printf("Client Bind Port Failed!\n"); ) e& |. X2 Q; ^% N ?( e
- exit(1); 2 W8 ~( X- S( o2 [7 @* v$ S
- } / M' Z8 p& {! z2 G3 E$ }& _1 i$ k
- / s# I2 ~( y4 l, \: x2 S
- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口
3 T6 T4 s9 `2 D" W# C) P4 n - struct sockaddr_in server_addr;
. ^) A) { E' `5 k6 X% q - bzero(&server_addr, sizeof(server_addr));
) W# n) ?) Z( h; G - server_addr.sin_family = AF_INET;
5 T/ ]4 v$ ]7 \! C7 X3 k$ z
k" q# S: r. S3 z# B3 K# L* ~0 t# J" s- // 服务器的IP地址来自程序的参数 % v$ w( q. i' N/ F, @
- if (inet_aton(argv[1], &server_addr.sin_addr) == 0)
3 W5 |3 }; M) ]" F3 I2 D - { # n5 t/ H) }) L. M# ~' g2 A
- printf("Server IP Address Error!\n");
) r1 ^" i+ h# v1 I0 S8 W. f - exit(1);
8 `6 H0 X& y1 e7 C/ a0 ]5 J" m' Q: s - }
! ~7 @" v; @" [6 {# R# d- e- S - " V2 d$ x; {0 D7 O" H0 o: v4 e
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); % c5 `2 f& o2 Z4 \8 g0 A4 ?6 w
- socklen_t server_addr_length = sizeof(server_addr);
/ i# U" W# o; M5 ?) v% I/ C - . B2 |; v4 ^, O; w2 f2 y
- // 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 a, K- s7 F; H1 {
- if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0) ( {0 |7 [* l6 U9 W
- {
( g1 h; _! X$ L3 z! W' Y - printf("Can Not Connect To %s!\n", argv[1]); & |2 U/ w" `+ _
- exit(1);
% O4 b0 p$ H. J- F2 J `* j- _ - } $ ~9 S* f: T5 J& a$ g: @: W
- ' U: L2 d% o0 B- z
- char file_name[FILE_NAME_MAX_SIZE + 1]; & g/ Y8 k( ~; f2 r% U) g
- bzero(file_name, sizeof(file_name));
( n5 Q8 ?7 O7 Z - printf("Please Input File Name On Server.\t");
% y4 e3 C q0 D! I, b - scanf("%s", file_name);
2 W5 i! f4 m" S. K9 J- t+ s$ [4 J6 {
+ Q3 a# R+ a: v6 f2 x! y# W: x+ |4 A7 U- char buffer[BUFFER_SIZE]; % w. }) v N: B* f4 b) w' D9 ]" U
- bzero(buffer, sizeof(buffer));
/ o/ T9 u6 ]# ]* ] - strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name)); , [ x% q6 E9 F( a- k
- // 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 1 w9 O6 B# l9 m+ J8 m5 z! _4 v
- send(client_socket, buffer, BUFFER_SIZE, 0);
) X, [5 K: Z( K* Z4 g5 Y8 C
& [( {. R z! Y1 R- FILE *fp = fopen(file_name, "w");
P6 P& K, E4 s/ U# O5 b - if (fp == NULL) # J+ K5 J. v5 S
- { 6 Z# q! L& p1 ]4 {6 i# t
- printf("File:\t%s Can Not Open To Write!\n", file_name); $ W6 K6 T- s" d# O
- exit(1); $ D3 T$ A" E1 m7 V/ {8 T2 i" j
- } 5 B, B* A8 P5 F v( m+ m9 x0 u# I
' w, f, ^* l6 Q6 E- // 从服务器端接收数据到buffer中 * ~' e i$ i0 G& V
- bzero(buffer, sizeof(buffer)); 4 B$ Z9 `( m' X3 [) X; O9 \0 t& ^
- int length = 0;
7 A7 Y- R; k0 I4 ] T0 L) W7 N( d% Y - while(length = recv(client_socket, buffer, BUFFER_SIZE, 0)) ' I l$ B" I. z; j
- {
& H2 M4 C4 s+ `, [$ B* d4 j - if (length < 0) , S5 }9 G% _: s
- { 0 M% m: J: n! Q
- printf("Recieve Data From Server %s Failed!\n", argv[1]);
' V+ `# F; F9 l4 g$ j& _ - break;
8 M8 _* c# y) C8 X$ Q9 u) C - }
- j- \$ ]2 N# G- s - / i4 E/ L7 V$ F" |
- int write_length = fwrite(buffer, sizeof(char), length, fp); + P s7 y$ z" k# j
- if (write_length < length)
; {1 {+ S8 M% Y; ^5 y' A- S4 S - {
0 j! b9 |5 x, S4 K4 P p. A! ~ } - printf("File:\t%s Write Failed!\n", file_name);
1 Q: l" @: B; q6 J* v. h3 P - break;
$ s& ^7 v. X( ?- ~ - } / V# ?# R7 Y( y( a8 ` U
- bzero(buffer, BUFFER_SIZE);
* W: l2 w4 N) d, U - } ( J6 m" y$ `7 t4 g( `' T+ ?
- * T. p3 s. j- X& o, A
- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]);
1 |' V V2 u+ U5 R7 R% ^: o - 1 G8 g/ Z- q* f/ A4 |+ w) m5 @6 I+ L
- // 传输完毕,关闭socket
1 B# P$ Y# b9 r2 w& U, D6 m - fclose(fp); 2 z1 P1 \8 X4 L! @5 c3 [6 z
- close(client_socket);
. |! U, Q! d7 R7 N - return 0; $ a: k% f3 {% v& T
- ' s/ E7 k) A9 u1 E$ J
- } ' W; E6 p! |$ k
- 3 U4 y( `" X: t& c
复制代码- /*server.c*/
. f V/ \4 x1 n. `/ y: H - #include<netinet/in.h>
3 t9 y Q& G' V3 v! R - #include<sys/types.h>) s2 o2 K) O# ~& f
- #include<sys/socket.h>
; ]: d3 R: d- G0 @/ `# x - #include<stdio.h>; X! Z( V/ C; T4 X
- #include<stdlib.h>$ n U& O9 t% O; q) _' ]; n9 `
- #include<string.h>% b2 s3 i7 G: F
! m; o6 Y' K9 ~ H* a- #define HELLO_WORLD_SERVER_PORT 6666 //端口号
6 `7 p3 S( P! X2 a* J2 m; U - #define LENGTH_OF_LISTEN_QUEUE 20
- g$ D$ z7 D( T, r- W - #define BUFFER_SIZE 1024) l" E7 j. x/ b' p6 n. U/ Z
- #define FILE_NAME_MAX_SIZE 512
0 \8 F# o) b" ]! w6 g - 7 f! r3 x/ Y( l+ F. Q
- int main(int argc, char **argv)
$ S3 G1 y/ o. k% G& [6 A, a$ { - {1 j5 ~' Y# X R$ _ i7 P
- // set socket's address information- T; b" x2 `: w9 j/ ]
- // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口" z3 t+ |9 ]/ E/ W0 s
- struct sockaddr_in server_addr;5 N/ g% Y! S. L1 e5 H2 w
- bzero(&server_addr, sizeof(server_addr));
4 C1 S4 F @! L4 H7 a1 c - server_addr.sin_family = AF_INET;
: D0 w& _% C7 ]. f% a - server_addr.sin_addr.s_addr = htons(INADDR_ANY);
! n# Q2 T! ~* w1 p, V- [1 a- |# P% Q) X - server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
! T1 f" o( _' D - ! ^+ {: ?8 X0 I; e
- // create a stream socket
9 @0 B2 x' g7 B* ~! q - // 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
; M# |' D ^/ N5 {9 R - int server_socket = socket(PF_INET, SOCK_STREAM, 0);
: S8 Q/ D; T V - if (server_socket < 0)2 w1 P! y7 f% Y/ ]! F1 U1 A8 ~
- {
$ k) t% \8 N, k# e - printf("Create Socket Failed!\n");) d3 [: V+ W8 p
- exit(1);% K R" q$ v* j! w6 o! S: D
- }6 @( \- n3 s0 z- R+ a# `5 e; u
- S% v7 x- |0 c4 A+ m- // 把socket和socket地址结构绑定
+ R! G4 o, Q( v+ ]2 {3 E! H+ a - if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))' A6 I9 v0 x4 x5 c- n9 g5 D
- {
. o3 a: o3 u6 T2 W - printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);
6 K% S$ S/ D- }+ ]1 ^( Q - exit(1);6 {; n% Z9 ]' B5 w0 u( W$ n
- }& A+ z/ c; B9 ?' p8 [( u
- # j2 E4 T- C$ [) N1 ^ w
- // server_socket用于监听; E5 N0 ?$ B. }4 R. [+ v
- if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))
$ j0 ]1 {/ q4 K* g. h - {8 y. ^6 V! r$ K/ U( o7 D
- printf("Server Listen Failed!\n");
# H+ R) t/ u/ O' D - exit(1);
4 L! E. z1 t9 I3 B5 | - } w3 h) ]9 f( U( o& F6 z- q( H
% R9 f" q2 Q: c( u/ J; R6 a; f- // 服务器端一直运行用以持续为客户端提供服务- t% i8 T' f* l! p& q$ W) I$ [. R7 u5 X
- while(1)
. K. h& x- ^# e6 ]/ d - {2 m0 Y! l5 J- e' X1 h/ _
- // 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 y: g' N; F h# k
- // 接受此请求,同时将client端的地址和端口等信息写入client_addr中' @9 n ?6 Q* ^5 m6 c
- struct sockaddr_in client_addr;' h7 }' S: Z! t$ u8 g! I
- socklen_t length = sizeof(client_addr);
# q1 B. D }# p- u9 |4 y' W. X! l - - E3 o, x+ Q9 c. ~
- // 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 v/ \3 Q% B3 Q) S* W8 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$ e2 S2 R) }' J8 P
- // 用select()来实现超时检测
W# r, O e1 G' C* G8 J( 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" A* `" M) @( l* }0 ^4 q2 x1 B
- // 这里的new_server_socket代表了这个通信通道; ]/ x3 x& s- t' [% T6 H
- int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);9 q2 ^- ^% H( W) F, s1 A( M* Q
- if (new_server_socket < 0)
0 N8 g2 b* I7 M7 i n- d% d* M - {# a' |/ |5 G# D
- printf("Server Accept Failed!\n");
8 d. m0 X8 [4 v8 _: X0 ]- I+ R9 e - break;
6 q3 G) m* e* c# k$ s) G S# H- x - }7 Y8 Z3 O ?. B. ~
- ' y# b5 |" ?( E% t
- char buffer[BUFFER_SIZE];1 H! h5 d6 A9 G" R& Y# [
- bzero(buffer, sizeof(buffer));
6 ?) v. V, {; y( Y. E3 f - length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);
0 L6 D8 H( m; E# |# x* C6 \6 O' } - if (length < 0)& y7 A( J" U% U9 b
- {( i3 ?* `) m9 t) f' ?3 o
- printf("Server Recieve Data Failed!\n");- y* W- w, P& m1 [7 V
- break;* @% U! w- t" L. a
- }
, j9 P3 X& E* X4 o - ; Z5 E, y2 s& |( v/ s6 N7 N$ |
- char file_name[FILE_NAME_MAX_SIZE + 1];4 E; C( i0 \! i
- bzero(file_name, sizeof(file_name));6 i, }: a* u( g$ \$ w) ~6 ]8 b8 b& u0 u
- strncpy(file_name, buffer,
$ u9 I8 M5 o& `' F5 K - strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));$ N( \! N( W4 V) H' X
- . G, s# b0 ^) e5 M
- FILE *fp = fopen(file_name, "r");. d9 R# I# ~+ a2 j% C& ~+ {. V
- if (fp == NULL)
3 J3 {, x' H& f; P, ~* W - {, r. n1 L z1 l# j) C# h9 U
- printf("File:\t%s Not Found!\n", file_name);: Y/ Q, S3 J5 B- h: \/ f& a3 [
- }: s i) _+ R% n" K( Y
- else& o+ t3 p3 P( F0 K3 W. N
- {
5 d, T& ^* Y( }+ Y. x/ g - bzero(buffer, BUFFER_SIZE);
/ n1 W( Q' Q9 r5 w( T7 x v - int file_block_length = 0;
0 o: |$ O7 o- j% A y+ R& x3 [ - while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0), A! h$ z9 c: ?$ Z% d
- {8 c: K% H5 K$ z+ n5 h3 R
- printf("file_block_length = %d\n", file_block_length);0 H8 Q, y: P9 F- V
- & K6 @! f2 y: T. F5 G( Z1 ?9 g
- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端
0 V7 E# @6 B8 O- o* Z; o - if (send(new_server_socket, buffer, file_block_length, 0) < 0)8 C. k$ ?0 r J' \+ h( ^8 r* R: w5 h
- {4 M- H& b0 }; ?8 b" H8 [% Z7 V- H, m0 t
- printf("Send File:\t%s Failed!\n", file_name);
+ S# O! _ r3 ]; }; o9 o# I - break;
& R, u# ^8 g8 K/ O; p/ ^4 i" ]" y - }
/ p/ s7 R( V' Q- ]6 y' @
2 T- R/ }, x! V4 X1 F9 |- bzero(buffer, sizeof(buffer));- c2 v/ T2 `9 A. v" u- g! t
- }* a) U1 r! c* @
- fclose(fp);+ c+ _6 l2 L7 Y
- printf("File:\t%s Transfer Finished!\n", file_name);
! l- i2 }7 O9 F+ z9 Z+ [9 I - }
' `4 a# c7 @. Z+ g
0 v: D3 d. a; R' S+ ^) A- close(new_server_socket);% R2 U. V3 l5 I; _( d3 ~/ j$ g6 E6 L
- }& Q* b4 q. D' X( ` [ W) @; x
7 s% `/ ?9 F, \1 E- close(server_socket);6 D% K) J: Q4 u8 Y" r
- 1 @7 c. C& t: O' Z% Y, K
- return 0;% Y: G2 p) {& ?2 W
- }% ?+ ^, |# K0 H8 E/ C
7 s8 k* A/ j# s- }7 q8 p2 |: K
复制代码
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