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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.
. [+ z% U( W9 A: F+ U- /*client.c*/
% O+ P$ b) T8 f- l& p3 K2 j" A8 t& W) l - #include<netinet/in.h> // for sockaddr_in 0 R( J4 ~' ~, {6 R9 g* n$ v5 `
- #include<sys/types.h> // for socket 7 c) ?( F+ G+ Q( y
- #include<sys/socket.h> // for socket 5 `/ q; L( g7 b" q! S+ k8 N6 J
- #include<stdio.h> // for printf + v' c: O; p$ ~. q5 f; Q- C
- #include<stdlib.h> // for exit
2 e! u6 n4 A$ a3 C - #include<string.h> // for bzero ' u( i& X2 `! y B4 G& u4 c% @
- - ~8 Y g1 D- |" _% a. f. B" M: V! S+ M
- #define HELLO_WORLD_SERVER_PORT 6666 # w* q$ z5 |* @/ d: y7 ~) `
- #define BUFFER_SIZE 1024
$ M7 q" e0 c: x# }# w: ?6 s% { - #define FILE_NAME_MAX_SIZE 512 ( C* j; Z3 ~' o6 O- ?! I5 g
, e: d. q: z# j7 w' y- int main(int argc, char **argv)
4 ~5 Z7 j9 ]/ S! J - {
1 ]) [# K9 I, v/ w6 l8 J - if (argc != 2)
2 H7 u1 ^* x2 m& O* O* R! } - {
+ W; s0 Q. v, R6 { - printf("Usage: ./%s ServerIPAddress\n", argv[0]);
& [' p3 S+ _2 d; x' @ - exit(1); ( Q' N, M" f; @/ i" Y$ B% h
- }
6 D p4 ]- k1 C6 U3 ?' u - 4 U, }+ j6 C$ L. L, w
- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口 - ?% K+ F, j4 X. `
- struct sockaddr_in client_addr;
; x5 Q4 X* R( a - bzero(&client_addr, sizeof(client_addr)); ! a7 L6 q) f5 \; O
- client_addr.sin_family = AF_INET; // internet协议族 3 c! p% J! z+ W3 J$ j
- client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址
5 D9 s/ e# {9 W s% d - client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口 ! y7 f9 V4 T( `( U- \/ S! h
' ?) d1 U: O& j: K- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket
8 @8 y& R# T6 q. i2 f3 N" b; f$ J' b+ n - int client_socket = socket(AF_INET, SOCK_STREAM, 0); % J+ l$ x/ T$ ~1 b' K+ @$ N
- if (client_socket < 0)
~& p6 e. b: p9 o# ? - { ) V* Y2 T+ x0 E/ w
- printf("Create Socket Failed!\n");
- P# \- k0 ?: _2 F - exit(1); 9 u9 H! }! X8 y5 K, m | C+ j/ k
- }
( r2 x# l" t; z' Y - 5 X! R- Z6 Z$ ~. x) |) n5 I
- // 把客户端的socket和客户端的socket地址结构绑定 9 N1 v, |7 ?- U. ~7 G7 R; M I8 H
- if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr))) 2 |/ L. ?' k. L% }
- {
$ Y8 ~8 J9 R$ H9 y - printf("Client Bind Port Failed!\n");
" X5 Q& V! U) V/ q( c# r7 q - exit(1);
# F# Z) v7 L) R9 Z& o* S9 u- n3 m - } . n I6 T3 q; ?# O- s& }& ?
- , e; Q' F( i$ n2 y2 B4 x
- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口 0 ^9 X5 d4 r1 K, z- k0 M
- struct sockaddr_in server_addr; * c S9 [" n- a3 A
- bzero(&server_addr, sizeof(server_addr));
* `$ ^0 z# n8 r& b1 X" z - server_addr.sin_family = AF_INET; ) ?( F5 P0 C' f, L3 l
/ \, P* U4 z# m- // 服务器的IP地址来自程序的参数 & |& d+ h! K5 I7 N! S
- if (inet_aton(argv[1], &server_addr.sin_addr) == 0)
' U1 N' T. m( Y' _* z7 j6 @5 B7 k - { - P2 ?! E& g! M, J
- printf("Server IP Address Error!\n"); $ M7 Z4 h1 k" Z: ~1 m5 p+ Z
- exit(1); ( ~" G0 ~: s I( {7 m% U
- }
2 H2 G u( P( p# Y0 v. L
o& {4 s+ X/ H, X- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
" \2 @; k2 q% P+ W - socklen_t server_addr_length = sizeof(server_addr); 5 t; ^6 Y3 ~) o2 R I
- 4 H3 P7 Z* x6 v4 S& ~, {9 ?
- // 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
* P/ \, z+ d$ @" x - if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0)
4 N" y: w2 c( m" f7 p4 f - {
. A3 X1 X/ v0 s2 m' n! ] - printf("Can Not Connect To %s!\n", argv[1]);
n: D' G- g4 j1 b1 x: y5 ? - exit(1);
8 }" n# l9 W+ G& n2 U2 u# i - } 5 c2 k: O; o y' }3 r$ G
3 ^) p1 n' k+ {4 q- char file_name[FILE_NAME_MAX_SIZE + 1]; ! |' a) C( t, k& w9 G$ F; |
- bzero(file_name, sizeof(file_name));
+ w( p- y. d9 [( x/ P - printf("Please Input File Name On Server.\t"); ; m* G8 c1 H+ q. J+ p' A8 |
- scanf("%s", file_name); / u8 W, _) K, \& \/ }, X$ ?) K% X
* q8 F0 z# m) [+ ?+ q% b- char buffer[BUFFER_SIZE];
0 O+ W+ Z% V/ D6 r! A1 g - bzero(buffer, sizeof(buffer)); 9 B9 B, Y& w: Z# e3 y6 S6 m+ j
- strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name)); ' d! u$ s" l6 k# u
- // 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
- e1 _" T! P/ n! v% l8 S - send(client_socket, buffer, BUFFER_SIZE, 0); 8 D! M' N6 |1 D/ y1 E
- # i2 Z q! o z) n
- FILE *fp = fopen(file_name, "w");
# p* P4 C6 a* }3 {! j- }; o - if (fp == NULL) 9 k7 h" |5 ]9 T* b3 S
- { ! c: d) J2 \- ^0 o, S7 m
- printf("File:\t%s Can Not Open To Write!\n", file_name);
% |, h5 v( X1 h$ ^3 L - exit(1);
% h4 I, T2 d+ t* ]7 N& Y. K# J - }
( T( Z5 F7 \% \; u - 1 @3 a! a3 k& d; @' \2 X
- // 从服务器端接收数据到buffer中 4 B. \+ ^7 x- U [, I- r
- bzero(buffer, sizeof(buffer));
0 g/ g( v7 L3 g - int length = 0;
& v7 l/ s2 X/ u - while(length = recv(client_socket, buffer, BUFFER_SIZE, 0))
3 p: J# ~3 C3 \- |# \1 y - {
7 ? r9 c' f- ~" \ - if (length < 0)
: u. [; ~! n' T - { 6 ~. a- m/ Q8 x& i
- printf("Recieve Data From Server %s Failed!\n", argv[1]); " {6 S2 b' ~2 c
- break;
! h ^' ^6 A7 S! B# |( B6 S - }
/ i! l# { d/ Z0 G
$ H3 D8 t: z& q6 j5 A- int write_length = fwrite(buffer, sizeof(char), length, fp); # Z6 J, R! C- ? e- e) C* G0 \; M
- if (write_length < length)
2 J4 E7 Z+ d/ i0 v - { % o& r. O) t/ {9 q |1 [
- printf("File:\t%s Write Failed!\n", file_name);
) |) ?+ }. c8 Y5 D# D5 o, P - break; " S7 Y) N# T, O
- }
* N! u0 q* ?, f$ Y8 q5 d1 ? - bzero(buffer, BUFFER_SIZE); * w, q1 O! x& f5 F4 b, {8 z
- } 2 a$ h+ @3 |" M i
- 0 R- _! u) W) [( Z
- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]);
1 Q5 c) a$ v3 p a' V2 i - 1 P& T+ H0 V6 S* i% b, N8 M
- // 传输完毕,关闭socket 9 R5 r- B" ~/ K6 W2 h
- fclose(fp); , u! z( v8 O, z% ?
- close(client_socket); 4 a" Y" b4 D$ l; r
- return 0;
9 {4 v* O0 _* g+ L5 K
1 [) b& `- o: l& U. M; l$ J' F* q- } ' V6 }4 L% f: e5 ^0 K
7 S7 J# U1 O: |: h
复制代码- /*server.c*/
9 G8 G: O1 N: w6 [9 @" n - #include<netinet/in.h>
+ W+ F4 D* h8 y3 D* |0 W - #include<sys/types.h>& Y6 ]/ q: K7 d
- #include<sys/socket.h>' p. @9 U g- b) H; J4 D
- #include<stdio.h>3 S% } i6 j* E
- #include<stdlib.h>* K- A+ D2 g0 ?
- #include<string.h>
1 E$ I4 Y& M% Z, P. f
+ Z y! P) n5 Q) \- #define HELLO_WORLD_SERVER_PORT 6666 //端口号
1 w4 n" d$ n0 u; P - #define LENGTH_OF_LISTEN_QUEUE 20/ y! b4 R' F* y0 f6 @1 w5 x
- #define BUFFER_SIZE 1024
8 L5 A/ o6 N x) b - #define FILE_NAME_MAX_SIZE 512! D# G$ w: l& p7 d0 Q7 G c
1 ~4 V9 P: T4 b8 w& |. k- int main(int argc, char **argv)0 p- r1 X2 G2 K% T
- {5 M- Z4 j. B- u" W% y9 t3 n* i/ \7 c w
- // set socket's address information: N: L7 K8 Q) v- \; O, i
- // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口
+ w" [, q9 F( K1 A - struct sockaddr_in server_addr;
U9 S1 i2 g) f0 r5 a u - bzero(&server_addr, sizeof(server_addr));
) H6 ?' f. M' V, R3 k9 ^* r# x; F - server_addr.sin_family = AF_INET;
0 l& p) C* T! @ D& M - server_addr.sin_addr.s_addr = htons(INADDR_ANY);7 I. e% r0 z: [! N+ A/ Z
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
9 O: G q; D5 y. V+ Q* K5 Z
$ ]; } u4 R7 G' e3 [- // create a stream socket
6 w# D7 b/ R5 }3 q, K0 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3 W! y3 q1 d3 [/ R* h# w
- int server_socket = socket(PF_INET, SOCK_STREAM, 0);( E6 k" `! T9 g# m# o' M1 w
- if (server_socket < 0)7 o/ q8 _4 N! E. q# B
- {
9 V& Z" o2 t7 E - printf("Create Socket Failed!\n");
! s& h2 E' L! q0 f - exit(1);
& Q% `6 N, N* i* I& g. L1 [" v. u) F - }& k' w( b* f( d6 C
- }: m- h5 R" y/ _
- // 把socket和socket地址结构绑定
1 S/ Y0 N6 T" E% E - if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))
* N k, u& @5 H - {
' |) y' f) f9 n: A! m# @. u. @ - printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);, L% \8 k* H5 l; F
- exit(1);9 ]9 Z" v6 P0 m4 N4 p
- }
) X+ M7 F+ H# e2 j& ^9 g. v8 T' }
7 k, E) y5 w* Y- // server_socket用于监听
* j4 m0 D! Y+ K% C7 ] - if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE)) }( E% H6 [' i( X
- {
7 a0 C; }! j7 `! W, C) ` - printf("Server Listen Failed!\n");; Y E1 w; u; i, ?4 W, L
- exit(1);0 z- d6 H g9 T; [" ]
- }
1 y# E$ S' ]) q) }
# V/ O1 m. t& V- U& f" S- // 服务器端一直运行用以持续为客户端提供服务/ p+ W9 B' o6 s! h6 x
- while(1)
# q2 ]; o h6 v- O* L( m' ^ - {
# k' [/ M/ k" ]( T( J- f! m3 _3 L - // 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
5 b; r/ k- ^, i/ m( 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0 B: e2 `7 u! b+ {; _) F
- struct sockaddr_in client_addr;
# {: c# v$ \( {9 s* B& a - socklen_t length = sizeof(client_addr);
6 w5 R, i, s$ @8 f$ u5 M - + V. r" [6 b0 ?1 C' x1 y- M
- // 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. {) {9 r6 n) G b1 w t9 o
- // 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 @" y6 G! Y$ R3 ]2 N
- // 用select()来实现超时检测# ~2 G: k5 o% o
- // 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( d( i. p2 g" }( C& C% O
- // 这里的new_server_socket代表了这个通信通道
( k% j. ~- v, E' o) c8 i$ h N( r4 q - int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);: l# n+ ^* q) z& @
- if (new_server_socket < 0)* i* v" K1 Z/ h8 P" |* y
- {
% ]: r8 S# l$ r- v0 U - printf("Server Accept Failed!\n");+ d( s2 [* L: [
- break;
( @0 F+ k0 a& l6 i+ j. j; m9 b - }2 `( A7 n2 j I( B) c c! K" R8 b: h
# n% ?) m$ S5 H5 D& ~- char buffer[BUFFER_SIZE];! s# u& V# e* T; @9 n. ~1 X
- bzero(buffer, sizeof(buffer));
# M* S/ W' z, L. R5 ?+ q2 k5 \# D - length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);
* O. C. `- E* [+ u0 { - if (length < 0). G5 d& [5 C2 K3 K' k' h
- {
Q& P2 K$ m, e' l9 B4 z - printf("Server Recieve Data Failed!\n");* D3 }( A3 ^+ G6 Y2 X" V4 O) \. n
- break;0 w( k; ~$ }" r/ j
- }
- d- `: ]( p6 t- z
3 c v6 x | o, i( K3 E2 M7 q4 G- char file_name[FILE_NAME_MAX_SIZE + 1];
2 K* s: E/ A$ T% c. ^; ^# S# Q - bzero(file_name, sizeof(file_name));2 r- d' F# }2 X( F" C. p
- strncpy(file_name, buffer,
4 w5 U1 y, L- O2 _+ M - strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));
5 y9 n) }1 d0 X. n8 w! H+ w+ }( Z
" ]; ~" g/ f, R3 x! P- FILE *fp = fopen(file_name, "r");# g: p- i, ]# z5 x( J3 C- c# F4 a
- if (fp == NULL)
8 ]0 b" _: B, L0 ?5 a. Z - {6 D+ g; L) z& D' d
- printf("File:\t%s Not Found!\n", file_name);
; j% D" I3 y6 {' c2 w- N. ` - }
0 @$ K, @9 K3 u& v( }' f& _ - else1 E, P8 x% s+ f* K
- {
$ W5 Z! L B! x* T! E5 g# @, [2 Y/ n8 I - bzero(buffer, BUFFER_SIZE);
" Z4 j6 r0 S8 V- ? - int file_block_length = 0;* F! n) s5 L7 Z; L/ Y
- while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)! K* e( E" H9 A8 q+ v3 Q
- {: M4 W! U% r: P8 Z) b8 q# \
- printf("file_block_length = %d\n", file_block_length);
& V) I8 H0 B7 x* @6 n& j, S3 o
( n) M4 U& v* I/ q7 |: z- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端
/ I5 H1 o' H4 _0 G1 u! t1 e - if (send(new_server_socket, buffer, file_block_length, 0) < 0)3 E7 B9 g6 Q5 K3 c- U+ k% L
- {
2 z: \5 n$ Z0 `: e# \0 I9 o4 A - printf("Send File:\t%s Failed!\n", file_name);9 e. d' J) z& s: B
- break;
, b7 N6 |/ R0 Z3 J' _ - }- j) M P3 K. F
- & a6 p5 C, l9 {) Y; d
- bzero(buffer, sizeof(buffer));3 S5 z. m) z! I: p" q* z
- }
. a* I, v3 b( R$ U$ x - fclose(fp);, T4 h9 J- l( ]% F; `4 i
- printf("File:\t%s Transfer Finished!\n", file_name);
% X- \& Q* c/ {* S1 x% j- _( L0 ~: v - }7 w$ V% r0 A9 I5 A3 C- H2 B1 }
( r7 v( l s) H- close(new_server_socket);" @5 X' ]) L+ S* B* u; V! [6 W
- }
5 G: w/ |# A, z2 c' r - 9 r4 g7 B8 q' v T* c+ C
- close(server_socket);
- g& ~( {: r8 }6 J* `. n - ! k8 W0 k P. _
- return 0;% z0 t9 \) ~- Z% i$ n' M0 y
- }
6 x5 o2 G: w% l - ; d0 ^) M y w8 Z
复制代码 ( `( R# [( M' X* C: B/ d
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