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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.* ]6 e$ S- R; ~
- /*client.c*/
3 B1 R! g& Z# f - #include<netinet/in.h> // for sockaddr_in
. e7 L1 z7 ^3 ?8 l$ w- R5 `+ Q+ B - #include<sys/types.h> // for socket
3 `; |: ^8 }$ p. @* p2 U - #include<sys/socket.h> // for socket
r7 g: U' f! i3 |& b; R* {2 m - #include<stdio.h> // for printf
5 N% X x% ?* y2 k) L) q" v5 E6 M7 P - #include<stdlib.h> // for exit / F1 l/ ]1 C- ]" f3 A- u- i0 M6 A
- #include<string.h> // for bzero : D5 t/ s: A+ R: M( Q+ d0 W/ r
- ) i; y$ Z) o- c8 c. |
- #define HELLO_WORLD_SERVER_PORT 6666 - h1 V$ H6 u; B
- #define BUFFER_SIZE 1024
& }0 A' L) n! a, }/ C" o( I+ T! _! R - #define FILE_NAME_MAX_SIZE 512 1 S8 ?" O! `$ L# D- x3 C d
- ) g; R4 h) \! F: R! w
- int main(int argc, char **argv)
- M* m7 e3 b6 n$ z1 a& w% x. f% V - {
% Z# t; r" Y( ^, P' Z - if (argc != 2) + s. ?; O$ P( O/ M- j- M
- {
( _' { |/ o- w - printf("Usage: ./%s ServerIPAddress\n", argv[0]); # D+ _# j& G6 j! ~+ k& A Q0 O
- exit(1); ' p8 n6 k. N- u0 k: b: c+ H
- } $ x4 z# r& y% r3 a2 Y
- 3 i# o) ^+ i) }1 i% d
- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口
3 N! }, r# D/ L" k: O" I; ~ - struct sockaddr_in client_addr; F' w# e* [, H
- bzero(&client_addr, sizeof(client_addr)); 3 h* u" r, Z' C+ i
- client_addr.sin_family = AF_INET; // internet协议族
+ v: |- R4 v$ K6 x$ T7 l! P( k - client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址 7 Y6 y- g& n$ V# ?# R5 X# x$ s
- client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口 4 c7 P+ {$ A8 U( N, e0 ^- k
7 o- t5 E5 }$ l6 g- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket # w7 Y* N9 B6 o! C) ?( i; }& g: t
- int client_socket = socket(AF_INET, SOCK_STREAM, 0); ) a- {1 W! j; \/ X! h
- if (client_socket < 0) ) u9 B/ m) g% J5 B
- { 9 K) R3 ?, n+ L8 ^# |4 V4 }
- printf("Create Socket Failed!\n");
. c, K4 t4 X/ K3 b3 e - exit(1);
, z) ^; P: m/ t! a' l' ]6 V - } 4 ]6 Q" N3 X8 J) o+ w/ h5 w
- " }) j) [! C! z8 e* s* @
- // 把客户端的socket和客户端的socket地址结构绑定
w8 q9 _/ @! _ K* S# a# k - if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr))) ! @# w4 v' N2 ~5 \5 j. k
- { # g: n% u" \+ X* p* Y( T* K" f) c
- printf("Client Bind Port Failed!\n");
8 |8 |+ k% x( z+ \* ]4 L - exit(1); 0 O3 Z7 B% f: A: o6 g' [
- } ( l) i# D7 E6 v* J- q( r
( v0 P" O+ W+ H! q9 G+ 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 `5 p$ V: k3 i6 p% c8 u) A8 Y7 t& L
- struct sockaddr_in server_addr;
0 v2 d+ y1 n1 D0 N9 g7 T5 k2 e - bzero(&server_addr, sizeof(server_addr));
[. g. u l8 V& d! ^! D0 H( } - server_addr.sin_family = AF_INET; . N7 d8 |! Z; E1 u5 R; t, ~: [
- # T& U' {8 t+ ?( s- i2 t
- // 服务器的IP地址来自程序的参数 ' l0 F6 c" K2 X) i! k2 y
- if (inet_aton(argv[1], &server_addr.sin_addr) == 0) 1 C% {1 Q5 a9 c
- {
9 O! M4 q) Y" p( R* { - printf("Server IP Address Error!\n"); 8 r7 ?4 e1 | N! H* J
- exit(1);
- }) g0 j! O+ \ - } ' P, U1 \: W; Y c: ` \* U/ }; u6 p
2 v9 f! M7 u; l0 Y) @. f- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
, n$ V+ i* z' V8 t8 ?4 e - socklen_t server_addr_length = sizeof(server_addr); 8 ?, \4 Q- |. g% w+ y' B0 Q
- ( | u, E' d' @$ F, h# r
- // 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- B) T+ E) V9 d6 F: @& H2 f - if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0) + n: Y) t, e& \# ]' f
- {
! o. m$ O. g) C8 F I4 S6 @ - printf("Can Not Connect To %s!\n", argv[1]); ' U0 H5 g$ e' E) f1 J! S
- exit(1);
* u- v& E: g5 ?$ _ - } % X: z* T0 S1 \7 f& i& }$ T, M7 F( i
+ d) ? F0 ~# e! e- char file_name[FILE_NAME_MAX_SIZE + 1];
( r3 @5 U k; }( ^& P - bzero(file_name, sizeof(file_name));
3 l, n: }6 L4 R/ ~& V - printf("Please Input File Name On Server.\t");
9 T- o+ P/ E! ^) k7 i - scanf("%s", file_name); + Z% G( Y4 {5 M/ W* E3 C9 r4 M
% @% t3 u/ C- K- m- char buffer[BUFFER_SIZE]; - Z5 ?" ~* z3 U
- bzero(buffer, sizeof(buffer));
# v8 k: o! @+ J4 B0 K - strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name));
4 F, a. k- D$ B- ?( B - // 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 : _/ `3 N2 @ @/ R% m3 b7 A0 f, ^
- send(client_socket, buffer, BUFFER_SIZE, 0);
' U/ a* F4 ^+ h3 d0 J2 O
7 l4 R/ E2 D" Q2 O0 O: w1 K5 x- FILE *fp = fopen(file_name, "w"); 3 K6 ~, l! u% C* J2 ]
- if (fp == NULL) # e* X4 Q. {: q: E5 k
- {
; ]- C+ p" m# F" N* A - printf("File:\t%s Can Not Open To Write!\n", file_name);
4 s8 \7 h' r$ k: s+ k1 `6 i - exit(1); : D2 N& O5 u, z$ _( b% e8 X
- }
( ~7 H" g3 j0 O% v0 f
8 @5 D% a% S' c- // 从服务器端接收数据到buffer中 0 e) M4 t* H' q/ w- e
- bzero(buffer, sizeof(buffer)); ( O" G7 S& o, i/ e
- int length = 0; 6 i% I' N! a" T' \
- while(length = recv(client_socket, buffer, BUFFER_SIZE, 0))
' x# t+ _- d( O - {
7 z" F3 z7 Q% r1 y - if (length < 0)
. L$ k( c/ P" c R" ~" x# s" Q - { : p% E3 t; ]/ F8 u% j
- printf("Recieve Data From Server %s Failed!\n", argv[1]);
X' s/ t- W( Y- s }" K2 \$ d, y - break; : K* z( q( @3 }& J1 x
- } ) D$ T. f7 y# J7 q4 m' a
2 E. x2 u. W( `7 p9 W. w+ d* g( i$ V- int write_length = fwrite(buffer, sizeof(char), length, fp); 7 t/ r, G. i- O3 y0 }% G; ~ z
- if (write_length < length) 5 q6 D. w6 s# y2 Z- Q
- { + L( U$ f, F$ L! k/ D3 H
- printf("File:\t%s Write Failed!\n", file_name);
. ~1 b" \& }. Q& K - break; $ x5 [+ N- p3 z$ a& z: f" w& _# f
- } & h7 u* o9 t/ c/ `2 S, S/ b) e
- bzero(buffer, BUFFER_SIZE); / o+ B( |# k* E! y9 M- I' Z
- } ' |- }! P; G+ y/ ?
- 2 J4 h6 H4 M( V' Q; J8 P9 E6 ^" p
- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]);
, a: p, }$ R5 K# O8 U
1 R! B% h5 K& ~# A# r3 a- // 传输完毕,关闭socket p4 a: m% m: x/ o4 f
- fclose(fp);
2 z. k$ Z# {7 c2 v+ }+ \1 a: k - close(client_socket); $ o6 g7 f/ h& U( l6 x. @2 B/ F. X5 r
- return 0; 9 F: ^2 u# h4 h! z9 x
7 w9 M& ~! k. c3 u7 l+ Y5 d8 f2 n7 g- }
; d5 x9 U9 O5 w7 n1 t, f0 F - ! C# N6 V5 v" J" P" z
复制代码- /*server.c*/: w+ E- k/ `! N, ?3 W
- #include<netinet/in.h>
3 E* K- b% }; u - #include<sys/types.h>
: O0 K) |$ o4 f& D7 ` - #include<sys/socket.h>, X0 a( U2 H3 ?
- #include<stdio.h>7 |6 \5 H' v- ]3 C% N3 @
- #include<stdlib.h>( M2 }1 v' ~0 l2 q( x. l
- #include<string.h>
. i$ k+ C3 X& L3 N* } - ( A% ~* W! r* M+ d; }
- #define HELLO_WORLD_SERVER_PORT 6666 //端口号
9 T0 H' e' a( k; ~+ d - #define LENGTH_OF_LISTEN_QUEUE 20
7 P2 S' [. ^$ D, ` L - #define BUFFER_SIZE 1024
, d9 Z& [0 k) e) }2 p! J" e - #define FILE_NAME_MAX_SIZE 512
6 b) ]# {- a% M3 N$ o9 o/ o& M1 H - 6 }6 B1 L& f+ V
- int main(int argc, char **argv)
2 a3 v* ?) S' I5 p. u - {" z5 t2 c/ \* x% n( N0 a. |- G
- // set socket's address information
5 b# W4 W( R3 L& K# J - // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口
, B- a1 x9 B; n - struct sockaddr_in server_addr;" D% f0 p. ]4 A9 G: T
- bzero(&server_addr, sizeof(server_addr));
7 S7 A! g/ m! ?( v; C* Z" ^3 `) K - server_addr.sin_family = AF_INET;0 J$ h- ?$ K# E0 t: A
- server_addr.sin_addr.s_addr = htons(INADDR_ANY);- c; l- U t) t) h; x2 G
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);9 t; {* Y9 ^, h
- 0 K# e r& M; [1 r; s
- // create a stream socket
. A8 m! f7 P( g" Y - // 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 c+ @4 e$ y2 s3 Q; }5 H0 r+ j6 n - int server_socket = socket(PF_INET, SOCK_STREAM, 0); p) ]1 Y! M. c7 J
- if (server_socket < 0)3 h; {0 `. {, ?( s& ]
- {
5 ~& V/ V2 {& [ - printf("Create Socket Failed!\n");4 i" O7 t: |9 b3 f
- exit(1);0 ?( |* } ]9 z2 y/ L
- }/ ?) k% v9 M0 A# Q. v7 t
- " s. ]* `$ a% Z- O% b
- // 把socket和socket地址结构绑定7 I3 i" j4 e& N" n% r
- if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))( l7 W8 e1 |9 a7 s0 K* g' z, a
- {
3 y& B1 s# t) A0 R6 S9 R - printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);' G0 J! Y6 a( q# _* W; P
- exit(1);
5 e! a( |2 ~5 D( i - }9 e. k3 B( G+ L5 s- w+ e5 }# I
- * m" B4 Q: U3 } r7 J. S
- // server_socket用于监听 y; P: f: v, U
- if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))
, E; I! s8 P `: ]5 k - {
" t9 Z1 M |6 S2 M. z - printf("Server Listen Failed!\n");
" p& ?$ Y f8 o, M l% R9 j - exit(1);" O* Z; V# K) X
- }
( K- V3 k8 G- V" o) y5 N( u+ L5 y; o1 O - ) D3 @) A; N6 I' W
- // 服务器端一直运行用以持续为客户端提供服务+ l, |; C& b! N% B
- while(1)/ u2 z) M( Y4 @* [
- {; h' O/ E6 {% q' n4 J4 {+ o
- // 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
8 ^5 F/ ^6 h$ Y/ u9 P- U - // 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. o3 D0 y: d - struct sockaddr_in client_addr;
% |8 a: D+ K; y. ^+ E8 ]6 | - socklen_t length = sizeof(client_addr);
/ R! ?& V% b. v
; | q9 c9 g9 l- // 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 @( Z0 O, b$ G4 `
- // 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$ D" T$ q% i( d1 X' t2 n" B6 d
- // 用select()来实现超时检测
: y, N; c. m. F - // 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, S+ k4 z* ^+ m$ C( }
- // 这里的new_server_socket代表了这个通信通道; _2 Q: c3 g7 w, o6 r! G
- int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);
4 {' b: p B( U( ]% L! ?* ~% q - if (new_server_socket < 0)" M! m/ K2 J7 a# ^' _, X& j, c
- {
; e! m$ |8 C% o5 @& k3 V1 _1 h - printf("Server Accept Failed!\n");
0 w7 w+ o, A5 s, Z( R6 P - break;- M+ G W% [2 \* p( W0 U2 p$ o
- }
# A2 {2 C* W+ m* o! O
& a+ f7 A: b# j; c- char buffer[BUFFER_SIZE];, C0 v B P8 v; A( Y" \9 \: }
- bzero(buffer, sizeof(buffer));
% x7 |* v Q0 w: o9 I0 g7 y - length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);/ \) _# R& c, b8 a/ F
- if (length < 0); ]4 X) T _$ r1 E
- {
4 f3 _2 I o" F) v. p# ?4 A - printf("Server Recieve Data Failed!\n");' f. F8 o( }3 \$ j) q, G7 d
- break;# b7 l- u8 A, g6 v) T7 a5 S
- }
7 H' W) E$ l# O; c( h& H/ V
. P9 m* ?* U* [& S7 e& f1 g0 P- char file_name[FILE_NAME_MAX_SIZE + 1];
5 y, Z. R: U, S* w- j - bzero(file_name, sizeof(file_name));' B8 e3 K( X5 u$ q7 B) p+ c" t
- strncpy(file_name, buffer,
7 X& w* y# `1 x; w3 {8 i - strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));3 K3 u/ v( F7 V2 e* ?8 W. k
1 h. H) m2 q' H8 F- FILE *fp = fopen(file_name, "r"); [* {' N! D1 T# N1 G0 b" k
- if (fp == NULL)% p8 u9 N6 E2 q9 M; [/ h' N7 O
- {* r' m' u/ p& a. n& N
- printf("File:\t%s Not Found!\n", file_name);
! S0 T# C0 p- W# K* r2 i! [ - }
- ?: f2 d: D" { - else) ^3 n Q, W2 A/ }! M
- {5 D: X8 a% I% j" Y& A
- bzero(buffer, BUFFER_SIZE);
% B4 m) e2 F" z4 q- | - int file_block_length = 0;
C9 Y7 B! G5 w1 T" E8 q) d- e - while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)0 d" I' Q. P& z/ F1 g5 H2 t
- {
) b5 t7 c F* d5 f - printf("file_block_length = %d\n", file_block_length);1 H9 ?! i- d- x( X/ Z; k
- 2 l+ ~" x& T. J0 {, \4 R) I
- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端+ n7 D: U7 u" R* C
- if (send(new_server_socket, buffer, file_block_length, 0) < 0)
) W* c+ o* ?4 ` _* ? - {3 S7 Q, h p W2 z" w9 B7 h% M7 z
- printf("Send File:\t%s Failed!\n", file_name);( n7 t1 c) m1 F" V9 l* K) @( W0 z
- break;% R* V/ e4 T5 w% m3 O
- }
* C1 C7 T( w+ [* ]# g$ j, p
$ R3 g, R& x2 k1 H; [- bzero(buffer, sizeof(buffer));6 g1 W8 v, N/ L* y ^# M" i% r
- }* J4 h3 Q; J+ u' C$ z7 U
- fclose(fp);
& h, s9 \8 z0 f1 [: r( C - printf("File:\t%s Transfer Finished!\n", file_name);: v: _& H- ?1 Z8 ~ `1 V
- }
1 o) E) \' j5 |% a& L1 r - . e5 I* k- j0 ^7 \8 n
- close(new_server_socket);
1 U* }4 I5 r7 ~8 ^ - }0 G' U+ `" }6 R1 u1 C
4 j8 A& j# O* F$ w( ]- close(server_socket);3 p; d6 a: L2 ~
, R3 l( F: C+ F$ ]# {- return 0;
+ p* i5 J+ U# I% D: {( F - }6 ] j/ ^ j7 z5 J0 Q+ k* I
- 4 J7 r5 w) _; p2 w6 {% Z
复制代码
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