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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." K9 F0 s+ I; J9 f5 N- e
- /*client.c*/5 G+ a6 e, U' |; v* Z, b p
- #include<netinet/in.h> // for sockaddr_in - q( l# q1 E: h' b, ?
- #include<sys/types.h> // for socket
7 t" v8 ?, H `1 C6 l - #include<sys/socket.h> // for socket
V1 Z* O( f) a: T' y8 B/ R: v - #include<stdio.h> // for printf
3 p0 P2 h- k9 _# n& d - #include<stdlib.h> // for exit
4 n) [* r0 l4 l" y F: k - #include<string.h> // for bzero
( t7 M6 a) ~2 Q$ X6 G - 5 M# k7 S7 }+ c$ E7 V5 G0 G2 C
- #define HELLO_WORLD_SERVER_PORT 6666
; D- J6 M9 g0 A - #define BUFFER_SIZE 1024
* F! n" q; w: h4 C! H( r8 g - #define FILE_NAME_MAX_SIZE 512 # _% F0 C( ^3 M' B" o
- $ D& c# X2 P, R' b( K
- int main(int argc, char **argv)
: h* k5 h4 G3 G; h0 u' `2 X9 x# T - { ! X! T* _) o: h& |- u' z2 M: `
- if (argc != 2) . s% I' H3 r; O) @# R; m
- {
. L' _& M& V2 I - printf("Usage: ./%s ServerIPAddress\n", argv[0]); ; o' ?; n: k* d: s
- exit(1); : r9 _: ~" u& y; `7 \9 z [- a
- } Y# k: V% Y$ x q" T6 {
0 H K: o/ e% J( R8 x, W& F# }- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口
3 v \" b# n$ ]& a4 U. T7 l, h - struct sockaddr_in client_addr; ( e8 g) L& [" l, ?. w( M
- bzero(&client_addr, sizeof(client_addr));
1 j# D; _' e ?- E# c% G; w" z - client_addr.sin_family = AF_INET; // internet协议族
* U2 A8 z) C7 G - client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址
0 }) t& I# \3 ^/ n - client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口 % i+ l* e1 n6 k6 s# z- O
- . q& b: y- y# R8 J" w5 M: N
- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket
# k" `; B6 i; F& F) D/ a6 e( V - int client_socket = socket(AF_INET, SOCK_STREAM, 0);
8 C; Q+ B' v5 J( Q5 m - if (client_socket < 0)
0 }/ O, v, Y/ {; ]& v5 x# o' o - { 3 [3 y6 e6 u- t7 }
- printf("Create Socket Failed!\n");
/ n, _+ I2 }' C9 _1 M - exit(1);
4 I3 a* `3 J0 @) ]* t) l# K - } , G- A7 b9 U6 C# t
- 7 I, T( J* [9 T$ f
- // 把客户端的socket和客户端的socket地址结构绑定 ; U3 V7 q+ c& H$ j7 i k) R# r* \
- if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr)))
1 @$ \' [ t/ O7 z$ K9 j - {
# o/ H8 M) @. W8 W" u" B - printf("Client Bind Port Failed!\n"); 6 c" T0 K) g% L! A
- exit(1); ) q) ^3 @2 [0 [1 C
- }
?% B4 y# A7 y+ m- K' j - " _6 s3 T/ n; i) r
- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口
# J* b* d/ n# Q! L$ a4 \ - struct sockaddr_in server_addr;
1 q4 F) N" Y1 n0 @* \ - bzero(&server_addr, sizeof(server_addr));
% f( ~6 z% A$ k! f) j - server_addr.sin_family = AF_INET;
2 h' V2 [# t9 p3 W9 r. ? I5 u - . i1 t( B D+ N; |; d
- // 服务器的IP地址来自程序的参数 3 v6 R7 x+ F4 K) ~
- if (inet_aton(argv[1], &server_addr.sin_addr) == 0)
# T ~. ] y# F - { . k4 T/ U' U# r5 c$ s4 A
- printf("Server IP Address Error!\n");
$ {) {7 a0 Y' \8 m - exit(1); - T5 v6 X- M7 T% L3 u4 c M
- } ; z, j9 S# J( _/ l
) \/ [( p9 g! Z2 r: C( R- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
4 x! X, Z" w- `4 B5 c$ i - socklen_t server_addr_length = sizeof(server_addr);
0 M1 x$ H9 D% G
W4 Y8 j5 O8 B7 e( [- // 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
! f+ | s: o, O - if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0) 7 }# c2 d' \/ k; b: r
- { + `8 v0 j2 R5 D, a. A# n
- printf("Can Not Connect To %s!\n", argv[1]);
! c1 C' ^, @5 K8 `0 r5 r5 { - exit(1);
# C7 a( g* a; m5 L. r7 y - }
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/ w% O4 B; G& q* ?- char file_name[FILE_NAME_MAX_SIZE + 1];
$ K9 C) R+ P4 L! Z! P- ] P - bzero(file_name, sizeof(file_name)); 8 q# N$ L, z" N# _6 e' m
- printf("Please Input File Name On Server.\t"); 6 u0 }' V0 ~" E4 R5 c% d1 u
- scanf("%s", file_name); ) F* T* w0 T7 O
- 8 I% `2 s; G( _! M
- char buffer[BUFFER_SIZE]; 5 Z% _: z! a0 ~7 K/ [ r! H
- bzero(buffer, sizeof(buffer));
8 z5 }3 ]# a% p' P+ a/ c; M, v- f - strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name));
: \6 x; R6 v' |( C) ]$ i7 q - // 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
2 G& e$ t1 M% d- q - send(client_socket, buffer, BUFFER_SIZE, 0); " `; Z- t" V3 T7 A3 }
- - ^3 B3 G8 @. D, ~
- FILE *fp = fopen(file_name, "w");
5 ] e9 x+ o. `+ v7 _6 K - if (fp == NULL) * L/ ]& C( H5 F# M
- {
5 x: E: w; P) h - printf("File:\t%s Can Not Open To Write!\n", file_name); # b2 I8 C" Z4 a& K" R/ I( J" I
- exit(1);
1 s; a; i/ E+ x - } % J, [8 A1 b) x) m# C4 l1 Q
- 1 P& y$ o0 p+ @/ z
- // 从服务器端接收数据到buffer中
$ Q) Z: r, Y+ n2 j6 c* E - bzero(buffer, sizeof(buffer));
, T1 p( W- A. a - int length = 0;
) Q* T* ~" R9 j, t* }2 y9 g - while(length = recv(client_socket, buffer, BUFFER_SIZE, 0))
- |1 ^% X$ J* X. L* q - { 2 K' W; P& P S* _- y9 z
- if (length < 0)
7 W0 t- j1 j' Z6 Y# P! h - {
. B0 _/ e8 o b, j - printf("Recieve Data From Server %s Failed!\n", argv[1]); 2 h: G3 g s; r/ K1 \
- break; 7 m/ |8 ^3 O& P( e* ^
- } 5 z; p; W4 _" [8 F$ L7 b
. g, [& ]2 L; B/ F J0 g: `1 ^- int write_length = fwrite(buffer, sizeof(char), length, fp);
0 T4 [/ l, \; ]+ N) l: r1 T" f; \: \ - if (write_length < length) # s1 f- C- d0 R8 ]& D$ T; Z. i
- { $ V P# w- U) M
- printf("File:\t%s Write Failed!\n", file_name);
2 e8 I+ v3 n7 c" ` - break;
3 T; k* {7 `1 h! ]" @ - }
/ l/ P( W2 i# V& n" z - bzero(buffer, BUFFER_SIZE);
- R5 b- B ]/ n5 _- A$ d - }
) q: l; O5 G. \* H2 i - 1 S; P9 \4 j, Y% U7 f9 |
- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]);
. C9 T5 e/ j3 U6 p% i - $ L1 f) }! e$ A% `2 f
- // 传输完毕,关闭socket
- F5 @# k1 u4 F' h) Y - fclose(fp);
( l( T& g- W# j- J' }1 U - close(client_socket);
C6 h4 I8 _ P# d. W/ c2 w - return 0; , ]# ?7 x3 v) h4 B/ ?
- 5 s& w" U( C5 C8 K4 W0 l) X
- } 1 i, O6 W# _( p
6 p* V4 o7 S1 T4 _9 N. Y, Q' U) p; P
复制代码- /*server.c*/ V6 l8 i+ s$ y
- #include<netinet/in.h>4 L( T" X1 R1 R0 o# H# I
- #include<sys/types.h>4 m& p6 j) e W. h0 Y
- #include<sys/socket.h>
0 E+ z6 J3 l, \$ q+ I" {9 ?/ o - #include<stdio.h>3 z2 _& D4 X" Q/ b/ [$ v
- #include<stdlib.h>
- H: @" S! M1 _4 \* n - #include<string.h>( U. i2 {* B2 c! n t. Z( J% p
- + j' L" h6 _! T3 u" T
- #define HELLO_WORLD_SERVER_PORT 6666 //端口号
0 M4 q& y; r0 f3 b' N2 _ - #define LENGTH_OF_LISTEN_QUEUE 205 m0 }" E( I( Z2 c* e+ W3 s8 _4 j
- #define BUFFER_SIZE 1024, o3 D7 m' x3 }; |: Q
- #define FILE_NAME_MAX_SIZE 512
! V0 d9 q* N2 o" H7 X2 Q/ p - 4 n& Q' d+ ~# f- T
- int main(int argc, char **argv)2 g+ j8 i p: k6 \2 n2 ^
- {
- W& R$ O& e4 Q% Z. N7 h4 N - // set socket's address information
6 X) C6 }! Q! j1 x3 B5 o - // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口
8 F+ i# h1 |7 n5 ?3 c; c% Y6 P - struct sockaddr_in server_addr;
2 [5 }4 D' V/ z6 \3 q& M8 h+ h - bzero(&server_addr, sizeof(server_addr));
4 |5 u0 R% Y: a& x% k - server_addr.sin_family = AF_INET;
# [: p4 t% G& V. o - server_addr.sin_addr.s_addr = htons(INADDR_ANY);
1 p& O. x: g3 t1 m5 Z/ ]+ a! S - server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
# F: E5 g- {! x* ?2 N2 p
r* u7 E6 }& Y m9 d- // create a stream socket
- Y7 X( I$ b# T% q; ^! K2 c - // 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& V. U* H8 J X7 w1 X+ y
- int server_socket = socket(PF_INET, SOCK_STREAM, 0);
. ^! u: V+ m/ ~- j - if (server_socket < 0)
! I, w1 ]! P i' q$ y9 S1 g( ~$ y - {
( z% ^9 p3 }- ^* @ - printf("Create Socket Failed!\n");( o) j. V$ D! }0 L+ s0 H3 S
- exit(1);1 d2 a5 C1 j9 n0 P' W0 d+ ?
- }/ W0 A* @7 k0 m' i% A @
- 1 r n3 y2 D+ `/ i% I6 k2 \
- // 把socket和socket地址结构绑定
8 z7 m; e+ z `9 i - if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))
/ j7 E$ E6 K5 T! l7 I - {
; N3 v9 ?. B1 t5 n5 P - printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);
' e; g3 e6 _' E - exit(1);) g; f# Y, t }; D2 P9 `
- }
8 j, \1 B% i" I) c - 0 ?4 T+ {' y/ h. L
- // server_socket用于监听9 k/ P7 B& a* v2 y0 F; k7 ?
- if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))# {8 t+ ]* [; O5 [7 [
- {
+ _9 _" q! J0 J: \' S( t! T w8 x - printf("Server Listen Failed!\n");4 y' ?# t3 j9 F( W; I8 n! m; h: n8 g
- exit(1);
& d) w( v8 ?1 e, j. | - }" P% F: W* J% P% b" ^# w3 O# K
) b k. L6 b1 {* [: c2 K0 D" P- // 服务器端一直运行用以持续为客户端提供服务; a2 p/ ]" k3 c' K3 p; [6 h3 L
- while(1)
- p5 U( |& d# j6 C4 x# r P& G - {
7 P+ K5 g( ]# Z2 A, i+ {$ T3 g - // 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# x' t% v2 {! _' V8 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
8 M! Q' n2 o. R8 f8 _$ Q - struct sockaddr_in client_addr;
& S+ ?8 Y4 a+ J( p7 |7 S - socklen_t length = sizeof(client_addr);
& z8 B& P1 a" x. t - : v/ N. G% G1 Q5 K: S
- // 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# n; x) B: n) a% X
- // 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3 p$ {, O6 I5 l2 C
- // 用select()来实现超时检测
; i- H( K) G1 K6 `) y* C# p - // 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) B- K: v, |4 e2 w
- // 这里的new_server_socket代表了这个通信通道
$ o# x% B8 `0 ]" P9 ` - int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);6 }0 y1 |" ~; K
- if (new_server_socket < 0)0 Q- r7 K5 L9 I& n2 f2 U: w5 x
- {
6 g' z+ u: `! S" N9 `4 Y. c - printf("Server Accept Failed!\n");
( `7 J6 o2 Q# x' o+ t& i1 d+ S - break;$ x. J" ]' J8 ?1 E( b
- }6 s$ c) _/ G9 b- Q5 N; e/ d+ @
- 3 |; V0 ~( }- r6 [
- char buffer[BUFFER_SIZE];
4 O* b6 q2 y+ v& e% q - bzero(buffer, sizeof(buffer));
i8 }! U6 L) f9 }% c2 K) J* e - length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);
3 g5 H; `# y' p6 o - if (length < 0)1 W+ a/ X. q* a6 e6 e1 M; j" i" V
- {3 c* D9 ~ E0 P1 d7 ]
- printf("Server Recieve Data Failed!\n");
6 M' \/ ]) W, h* c - break;
7 M* g5 A' m7 O: R1 I+ m - } g/ h* I* m1 ?/ ?- X! I9 [% L3 D j) D8 v
7 c. s$ ?" S" c/ X- char file_name[FILE_NAME_MAX_SIZE + 1];, t6 V9 s* D" o) }- f3 @' t
- bzero(file_name, sizeof(file_name));0 m6 I" P1 m" P0 P. { Z
- strncpy(file_name, buffer,
5 P( E/ z* K# l# a8 e2 W/ D - strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));
3 y/ H. {8 f1 r* z$ D4 f+ W' W - ' i% K3 v) q% E7 d( x9 x& z/ y
- FILE *fp = fopen(file_name, "r");& \8 k+ G8 |1 B0 m3 u7 v2 a* H
- if (fp == NULL)
6 _. R) F+ W+ v4 e; K - {0 ~5 i' Q C' \8 \- k' q+ z
- printf("File:\t%s Not Found!\n", file_name);
8 r6 c, J/ B" Q - }
: D& X! _/ E9 ?6 q/ G - else1 a( T- p7 C$ D* d* k
- {
3 F' \( a E5 J0 B ]3 c - bzero(buffer, BUFFER_SIZE);
0 ]4 P8 g% @( L+ T - int file_block_length = 0;
) V8 A0 N$ |2 O' G4 w" l - while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)* b4 S, J! j& Y7 K) s+ T, Y: g/ R
- {
# ^, a7 K0 k: |' C - printf("file_block_length = %d\n", file_block_length);
( x. L0 N, H% b - 9 W0 n- Q$ ^1 }. I3 z. c3 \
- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端+ d5 E6 D9 \4 G8 ?0 z$ C
- if (send(new_server_socket, buffer, file_block_length, 0) < 0)7 u- x5 N- u' h! _, x% \
- {
- _7 x \0 m! f | - printf("Send File:\t%s Failed!\n", file_name);0 O6 C* X3 t2 P7 d7 u+ X' c
- break;' g* o* ]4 p& }! k; v* J5 Y
- }5 \* V5 v1 |3 n# c
- 3 ]. O3 o+ R1 A! t- `- x
- bzero(buffer, sizeof(buffer));
3 u+ p) s; T5 |; J$ \5 c6 r - }) i0 o: ]4 d" I2 I1 _5 @5 W& L
- fclose(fp);
) T9 h( n! t* l! \& M6 ~3 F" u - printf("File:\t%s Transfer Finished!\n", file_name);
f) U7 Y; S: J W, _7 s3 K - }
* a) n6 `" s- `/ L1 E! ]2 v v; ~
g4 Z& G0 x* P# `- i8 u' a7 ]' `- close(new_server_socket);( O; ]- G9 {' G% F& Y' i( ^1 ~
- }+ r4 \4 T5 u. k* v8 X5 G* U
9 E6 h4 n; {- v5 v$ [7 Z- close(server_socket);
; w+ d- N. |- Y! h# a0 C
. P/ o4 ~* J% r7 u- return 0;
5 l6 c/ s* p$ g5 Q - }
5 y0 _+ w+ \) x+ ~
4 x f( P7 q B5 U' y6 {9 q I3 q
复制代码 ) s' D" v# F+ A f4 n
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