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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.
7 f; m, Z8 v4 D$ O/ e) W- /*client.c*/
2 |0 p8 ?' Y; a+ @6 W# N - #include<netinet/in.h> // for sockaddr_in
' W# G4 w5 b; n- }$ _/ r) f3 L - #include<sys/types.h> // for socket
/ D2 h7 T4 C. _7 |. k+ p: s5 H" \0 g a Z - #include<sys/socket.h> // for socket
% k" m0 E4 }- V# t' s+ o' Q - #include<stdio.h> // for printf 4 N, A; {0 H4 u) Z; y% h! ] s5 e
- #include<stdlib.h> // for exit ) T! c+ @2 l* p
- #include<string.h> // for bzero
: i! f" n# n! |7 w, G3 B& f9 o7 _ - " n2 ^# |( l0 Y& g( {
- #define HELLO_WORLD_SERVER_PORT 6666 9 Z) Y1 D' C, e; {, g% k# Q
- #define BUFFER_SIZE 1024
8 P; O: B6 Q8 E) G% i5 G# ?4 F - #define FILE_NAME_MAX_SIZE 512
6 l9 S6 A5 M3 i' v0 j - * Y# R7 q |7 H( A8 ?% |; Z
- int main(int argc, char **argv)
}4 B/ D1 }+ Y" `7 v' R - { 3 Y! ?) O& W' E8 j5 Z& e
- if (argc != 2)
( B! N( b! _) a |* N - { 5 S8 @" Q& H% n3 g. l
- printf("Usage: ./%s ServerIPAddress\n", argv[0]); : T C! M$ i+ X1 a) x! g
- exit(1); " p9 d$ G. L" v0 a% U
- }
% Z1 z7 O4 E& j& D+ m9 N - 7 X% D( `. N* |9 c3 |
- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口
4 d, C- Q! Y" V/ s* ~# b5 ` J - struct sockaddr_in client_addr;
) I g1 [* S4 y% E - bzero(&client_addr, sizeof(client_addr)); 6 C4 f5 V% E0 x0 N! S- f+ e0 x0 x
- client_addr.sin_family = AF_INET; // internet协议族 5 e6 v; e) Z) n0 y" U
- client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址
2 w0 l* q! l0 i5 Z8 l - client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口
! G. x. K( Z9 u. G; q: O" | - , `: B E2 T0 s4 N
- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket ! b& N+ p: d1 ? b- U
- int client_socket = socket(AF_INET, SOCK_STREAM, 0);
2 }) X8 i; W9 V: ~2 M - if (client_socket < 0) , [# o3 J! J4 ?" T! Y
- { $ ?1 s P3 w: h4 V; @
- printf("Create Socket Failed!\n");
0 j/ n7 P& g: x - exit(1);
2 N7 C, N* t; D U - }
# y0 [0 Z% W7 |+ _6 K, ~
) w8 N. K. m. d5 \, L- // 把客户端的socket和客户端的socket地址结构绑定
5 l* L: o$ m6 w& N7 ?7 {+ O - if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr)))
" `; A3 x* t, a) |) g - {
7 o" a# E" |& Z7 A, a - printf("Client Bind Port Failed!\n"); 3 d4 E' W- P$ x* |0 v3 c6 G* v
- exit(1); 3 c. P* Z& m5 h. g5 J
- }
3 y" Z2 j0 e9 _2 f5 b; i
$ y0 z0 k7 K8 p; q& u- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口 , R/ [. C( o0 ^' R" f8 R, [
- struct sockaddr_in server_addr;
; N/ z( P; d. m; g - bzero(&server_addr, sizeof(server_addr)); 4 z$ z7 `$ ]7 C5 B1 j
- server_addr.sin_family = AF_INET;
2 l3 a" Y" R2 S. J" A
- h) D, d: a2 L/ O& x- // 服务器的IP地址来自程序的参数
2 [3 Q; f2 \2 _, [, q+ H - if (inet_aton(argv[1], &server_addr.sin_addr) == 0) 1 Q$ H" D; N- {
- {
) _) p* W: A' Q" n% g - printf("Server IP Address Error!\n");
K9 d( T2 T8 g7 d9 {5 \9 l - exit(1);
: e5 R+ E6 c$ n - }
5 Z$ W+ C; ~' A3 z
2 }/ Z( w2 {4 c/ k1 N- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); & w" Y7 @, e& ?* _. \
- socklen_t server_addr_length = sizeof(server_addr); 4 Y; Y: J. U- f- I1 X3 x' C+ C
/ ]# {. [! J1 [% L1 K" ?7 R4 w- // 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 & Y; O: ], j! O0 ^0 R
- if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0)
' E( v$ b" w& \: ~ - {
5 ~# p& J: O- \* G7 m% S: _' S - printf("Can Not Connect To %s!\n", argv[1]);
! c+ Y& ?) E( h; u5 s( { - exit(1); : \) l6 j$ E- W+ G
- } : N- a, Y' ^% b; \. F
- # \- y( Z3 W7 F
- char file_name[FILE_NAME_MAX_SIZE + 1];
[. S5 T5 B: }! Z( |7 C# e4 ? - bzero(file_name, sizeof(file_name)); , }, h# e0 U7 \; y4 O
- printf("Please Input File Name On Server.\t");
, v! F J3 a8 q, E J! S - scanf("%s", file_name); 9 }" _/ v4 L; Z. T- w
}+ c# m4 ?, ~# S: r i- char buffer[BUFFER_SIZE];
+ b" d4 K* a ? }; } d! _- s* G8 j4 Y9 h - bzero(buffer, sizeof(buffer));
: Q S% V! |! R) y/ e; d - strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name));
" P1 K, J; f( Y) `& c - // 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
, P* v) T, {$ T8 F5 D; s - send(client_socket, buffer, BUFFER_SIZE, 0); ! M8 d) ?( l( p' T4 C0 Z6 @! z
- 3 _1 |( Y& @! R# |5 M
- FILE *fp = fopen(file_name, "w");
1 Y `! d8 J4 j2 j* R/ F' F7 t- o - if (fp == NULL) 5 h" Y, H @% Q3 f+ @3 ]1 f9 G5 j
- { 9 F: @3 t5 y/ |; z# h' U% w
- printf("File:\t%s Can Not Open To Write!\n", file_name); ^( Y4 J) U' v H3 Y# i
- exit(1);
7 w- j% _- v) y2 M0 ~ - }
; L8 g$ V( h" K
7 i G; M( o) W: m4 `. U5 ~- // 从服务器端接收数据到buffer中 . J8 Y+ q' a5 K: e* \8 `$ D& L
- bzero(buffer, sizeof(buffer)); 0 e8 B* q3 f: B+ {0 e% @2 d
- int length = 0; ! E1 n. Q4 }- |. Y" v+ Y
- while(length = recv(client_socket, buffer, BUFFER_SIZE, 0))
5 O) s3 F# j% e, n. G - { 0 X* G5 n: x& N! v1 d7 b& @1 c, Y
- if (length < 0) 5 [3 w/ j4 ^6 s- _
- { ( h5 Y1 F7 Z' Q; y# c$ h
- printf("Recieve Data From Server %s Failed!\n", argv[1]);
! }4 _8 U3 B: r6 _4 I% { - break; 6 x% I/ i8 o$ k2 j
- } : S6 F+ U9 U- b8 x; o* X7 h L
- S0 K- J% P9 \# T7 h! ` A- int write_length = fwrite(buffer, sizeof(char), length, fp);
: G2 R4 n4 F# V, r/ b8 ? - if (write_length < length) ) H# y! g8 h4 t" V, Q
- { & p$ U8 e9 z0 t/ F% s! I A
- printf("File:\t%s Write Failed!\n", file_name); 5 O+ C5 N* c! X' K' g+ ^1 _
- break; ) A/ o/ `% J2 Q9 K+ C
- } 5 s' p7 O# s: _" D. N0 N6 x
- bzero(buffer, BUFFER_SIZE);
- w% x/ k- w/ X! v2 O - }
, u# I; O/ C. P
5 t3 E! u* \/ j0 Z- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]);
0 x5 _7 J/ C9 s T - 6 G; K. y5 [+ n; Z
- // 传输完毕,关闭socket
# g( R# T5 D5 {- w4 G8 m - fclose(fp); $ s( m( ^( u3 L: Q4 l# D; }) e
- close(client_socket);
% ]. h l' E- k L4 t - return 0;
3 z" [; _3 o) ?6 b6 S: g - , F5 Y4 R8 [( P* M! E
- } % v4 w1 l1 |1 v V2 Z8 S. e
- & V- y A" L+ I/ z6 F0 |. J: [: Y6 a' p
复制代码- /*server.c*/1 [: w7 I$ R8 i( h6 p$ x. Z
- #include<netinet/in.h>( J6 }! f+ X" s4 V
- #include<sys/types.h>
5 b# j, r# p! S! b( n y( v - #include<sys/socket.h>7 D* }- O" t# k$ X) g6 _" ?
- #include<stdio.h>! O4 U) {9 l- N3 S% V: Q2 P
- #include<stdlib.h>
( f; ]( m4 j) C* h4 S# V - #include<string.h>6 B5 Y5 G' [. q
- 9 p; E: {; b# s! Y7 H
- #define HELLO_WORLD_SERVER_PORT 6666 //端口号
) s/ M: Z+ C- r9 Q+ j& g9 @ - #define LENGTH_OF_LISTEN_QUEUE 20
6 u/ k1 A0 S$ o5 `) } - #define BUFFER_SIZE 1024& }( Y; W8 H9 k: R3 k: i
- #define FILE_NAME_MAX_SIZE 512
% Q! p1 t- o/ z8 U: D. ] - E; B, g/ J5 z7 J7 m
- int main(int argc, char **argv)
( c5 ?1 {+ v/ ]9 y' O - { X N) A$ g( V
- // set socket's address information
5 g( r+ J1 N1 D- x' S - // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口* ?0 F5 @9 j/ x0 }/ |% ^8 A
- struct sockaddr_in server_addr;& T) E0 a+ q) T, @% g0 I$ _- X& [% Z
- bzero(&server_addr, sizeof(server_addr));$ J- c8 ^! M3 |% k
- server_addr.sin_family = AF_INET;
; K; A* w8 M' | - server_addr.sin_addr.s_addr = htons(INADDR_ANY);- R/ h/ t ^; r& d4 {# { k
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
: P, ^% y1 o2 N0 M& p+ h1 d - ' K, ~2 ?% j0 w4 P: X7 q4 I) Y. P
- // create a stream socket
8 C% y" 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 |" C/ Q9 \& B$ f
- int server_socket = socket(PF_INET, SOCK_STREAM, 0);. `- U! l6 J) Q4 ]. M6 h+ b
- if (server_socket < 0)
3 b/ e6 ?* B0 B- _ - {
' }, ~8 ]4 U3 k' k6 p1 J# p2 S - printf("Create Socket Failed!\n");- f1 e9 |' o) x& t8 }5 h
- exit(1);2 x6 r( I, r5 E5 }6 e; I3 F
- }! r5 o7 b8 J! a! n7 a. c- s( t8 L; Z5 T
- 4 n, b) X, ]/ X o) `& _ D
- // 把socket和socket地址结构绑定8 |% M' ~/ S0 ]3 ^5 q
- if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))
. o+ h- E+ E5 q - {& Q5 L f* T% u: w2 g
- printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);
8 M# x4 L0 {' N/ y/ b9 v7 c - exit(1);
& f7 V! Q+ B% j! z* C% l3 f# F - }9 `" ?: h+ D* O; f
3 v4 W# G0 k: }+ z- // server_socket用于监听7 S( C# s: ?0 k7 @8 s" I
- if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE)); z( _/ z' o" y. s6 s
- {1 V- Q0 a( M! ~! V
- printf("Server Listen Failed!\n");! u2 F, a8 _# O+ w9 R" M4 b) ?! T
- exit(1);
, v, V+ ~' |1 F% [4 n7 X, a7 e - }
1 H8 \. ^5 U3 |2 k7 G
+ o( o \+ e7 `- // 服务器端一直运行用以持续为客户端提供服务
$ y8 O. i) h2 t1 S - while(1)
. n$ d- V ~3 u ?# u - {/ V$ }, N$ \, z3 t( ^1 a# T
- // 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
1 P- U+ ?* `8 G0 [ - // 接受此请求,同时将client端的地址和端口等信息写入client_addr中& u( R* s" f0 Q3 _( Y! E4 o
- struct sockaddr_in client_addr;! Z c5 J" G1 K5 Q" w
- socklen_t length = sizeof(client_addr);& h% y9 A, S4 B! w7 U$ x2 q7 z
- 5 D0 J9 x# \1 Z7 }5 D0 M+ q
- // 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 o0 h2 c+ v. o$ D1 [
- // 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+ m# l: U% \" A4 J4 {4 B0 o
- // 用select()来实现超时检测
1 B$ @: _; h' \& ]+ 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/ L- z: L# d6 r( b
- // 这里的new_server_socket代表了这个通信通道
7 V( z$ C$ h8 C1 ^4 d7 Q - int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);' K% |$ V+ m6 X8 ^3 z' `* Q$ h
- if (new_server_socket < 0)+ Z& x6 W" O+ I9 f2 F. l
- {# w* l7 T7 V% a
- printf("Server Accept Failed!\n");
" j8 u; [) X# B" w( z4 R - break;0 J0 y7 U& h9 k- R
- }# Z9 c y& Q% R; G/ j2 c2 Z. z
- ' V) U6 u/ c/ |/ f
- char buffer[BUFFER_SIZE];
, i! `2 l2 e: `6 W+ [' H e - bzero(buffer, sizeof(buffer));
9 d5 a" Z' U3 ~/ ?6 Z - length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);
" r5 X2 d; ~* x& n - if (length < 0)
% ~1 {" V/ X) g6 B2 X - {
( K! H! y0 E, m7 F7 `; x# } - printf("Server Recieve Data Failed!\n");1 Z/ V# H0 r+ v P: ]
- break;+ u5 O n3 P" D0 z$ G! K3 A
- } s( o" O" @& [) G: y- o. B9 _
- ! n/ v: v+ Z7 n+ N* }- [
- char file_name[FILE_NAME_MAX_SIZE + 1];6 W& U, j8 B. k; y7 w/ \) h
- bzero(file_name, sizeof(file_name));
2 e& W- ?& g, }( h( R; [3 ~8 s4 T - strncpy(file_name, buffer,
1 _0 ^% A" f4 q. t4 @ - strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));
6 L0 i4 r+ r3 u
; m3 F0 _- z9 e- FILE *fp = fopen(file_name, "r");
" P1 o" @$ j* d - if (fp == NULL)
6 b1 |( x- q- U - {
) k5 y% C; q1 i3 {& G3 ` - printf("File:\t%s Not Found!\n", file_name);( O }0 O. w+ D: K" q3 R7 U
- }
, s$ U5 q; l5 Y- k& \0 k2 b" p - else% j! X( n: l. a, O5 H4 @/ c
- {
6 K8 S+ v3 Y( g+ a# ` - bzero(buffer, BUFFER_SIZE);# w- u; `' V) `
- int file_block_length = 0;
9 i$ n' {# W% ^- R - while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)
- v7 p) V; w5 q4 x' p( S - {1 g7 o5 ^+ J! \( b$ G' B
- printf("file_block_length = %d\n", file_block_length);) I9 g7 `. e+ \* c1 x0 H: Y
" f" s0 Q( [8 y' }; C% w- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端0 e) X5 M4 z" }3 V. V0 o
- if (send(new_server_socket, buffer, file_block_length, 0) < 0)* J# \/ V" V. h$ S$ P7 S9 A; e
- {1 e0 m( @4 r4 a$ s
- printf("Send File:\t%s Failed!\n", file_name);, l, U8 _/ {/ c) O5 l& R
- break;
! r0 w/ T; Z4 s7 O - }
$ L o1 d# u4 e
! n T0 b3 D4 n' U- bzero(buffer, sizeof(buffer));( ]/ P0 E% E7 |- t* D+ p
- }2 ^! m; h- F% b, v* K
- fclose(fp);
! W0 B. n$ ]& f9 w8 L: Z - printf("File:\t%s Transfer Finished!\n", file_name);
}" Z* Z" r/ G; |% E6 P - }
$ u7 ? f2 Q; e$ f7 `
2 K* n) c3 o3 v5 n- close(new_server_socket);, Q, @6 z6 R# T
- }
( p6 T; p* f; c3 c
, f# V" s% C5 Q% m) h- close(server_socket);) Y3 F& y' \& ]! g& y3 ^1 ?
- * Z( Y8 i7 v" v
- return 0;
; d4 u5 Z" f9 ~& K9 ~' h0 L8 L O - }
! o: f. K" x& m3 W `! F8 j. }5 \ - / e! h$ G( n$ Q2 d$ b: A3 G
复制代码 5 y% |4 B3 O0 a5 Z1 O# {( N
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