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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.' {: o! u" b6 `* X
- /*client.c*/
8 s0 T3 O5 h# ]3 M" E2 O - #include<netinet/in.h> // for sockaddr_in
8 L) A4 {/ Q1 ^5 `8 j( u# W - #include<sys/types.h> // for socket 2 P! u5 Z/ v3 v! k
- #include<sys/socket.h> // for socket 7 U9 t) G h5 f3 c
- #include<stdio.h> // for printf & K/ ^% ?/ |5 _ u6 T$ b6 E
- #include<stdlib.h> // for exit
& W+ c3 ?- }, @% d# \ - #include<string.h> // for bzero
- \, s, g+ r5 M
- G0 R! r% @" R o% j1 y% ^$ ?- #define HELLO_WORLD_SERVER_PORT 6666
: _" C; z: A1 y+ Y. p7 Q( D - #define BUFFER_SIZE 1024
9 B; q& t8 E E) g - #define FILE_NAME_MAX_SIZE 512
" N: `1 L r0 g( @/ j4 Z - + c' R- N- e$ o+ O% x
- int main(int argc, char **argv)
8 K0 B- U+ U' B- S& e - { , x2 E" S c) O
- if (argc != 2) 4 u. v; S+ n5 A$ g
- { & K# a: `* g0 p' @/ b! |
- printf("Usage: ./%s ServerIPAddress\n", argv[0]);
5 C) |) H; B# ]- s1 w5 _. ~% T- p- z - exit(1);
; O9 a b( |) O- z1 S - } 2 q5 `) B: E; K( K4 C
1 p0 e7 N7 o0 C) a! S( U- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口 . l, X2 K$ t- p% X4 D3 ]
- struct sockaddr_in client_addr;
1 F( j6 N3 {% P/ k3 G5 J5 ^2 f k( ` - bzero(&client_addr, sizeof(client_addr));
1 N. B# @6 r+ {' O! p - client_addr.sin_family = AF_INET; // internet协议族
- B' F- F. Z, b2 h* {3 w+ b1 _* J - client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址
1 M* _1 i0 }' d8 W2 ?$ h. U' B - client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口 3 v, T! `. v5 }
- 2 _/ _3 E9 v# ^: z
- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket - m1 @0 r5 q0 R( k3 ^( k0 y
- int client_socket = socket(AF_INET, SOCK_STREAM, 0); 7 d& e `( n: d: I/ `: k
- if (client_socket < 0)
; | l) c8 t9 \ - {
* F9 X& e) y7 `- `% X8 |. H7 k$ t) \4 ^ - printf("Create Socket Failed!\n"); 3 u# u. Y: |1 n! V' \& d7 N
- exit(1);
5 w& z R5 P( a( W1 A9 U - }
" ` S' |3 `- t3 h% e
7 [& _: X3 G- T9 _0 d5 d' |6 F1 K" f. W- // 把客户端的socket和客户端的socket地址结构绑定 ( ], t O) L! Y7 [
- if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr))) ! v0 d- I C; V( c
- { 1 o4 Y7 Y6 i* e. P* F* f7 I
- printf("Client Bind Port Failed!\n"); " W3 i( U0 f9 Z" _7 Q+ t! f/ R
- exit(1); 1 {. @0 A1 w' t0 a* a
- } 8 g6 S# s n1 |9 K# ~- ^9 ^5 v
5 F n$ \9 p% k( G& C- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口
% M& l0 h, B+ y- E _. Z, b; V - struct sockaddr_in server_addr;
3 f" `& x6 J N - bzero(&server_addr, sizeof(server_addr));
. e' {; F) g" H# ?6 z+ d - server_addr.sin_family = AF_INET;
, }1 i" \0 W E1 b- B9 F8 g
$ J( `8 y) q2 ]( B- // 服务器的IP地址来自程序的参数
; r- ^ i9 @9 N+ N$ f1 f0 B - if (inet_aton(argv[1], &server_addr.sin_addr) == 0)
, ]( e( y& P8 M) ~ g0 R - {
, h. N( c4 r7 F" j - printf("Server IP Address Error!\n");
x8 l0 u* A: C2 C* v* f3 F - exit(1); # v+ E$ U3 q1 v5 p& {3 f
- }
" u% M: I& ^4 B" d* ? - 2 J% [" U A+ N7 `2 q P
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); 9 R8 G( W/ o0 R3 Y- ^5 w
- socklen_t server_addr_length = sizeof(server_addr);
$ c6 S7 R/ H& S - ( z$ G% i X' K, ]
- // 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
9 g$ Q" N9 m( H8 X& y: s. C7 F - if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0) ) V2 j- R d7 m, g9 r. C }- N
- {
) r: q7 z, J$ G6 \. L; h) g - printf("Can Not Connect To %s!\n", argv[1]); 2 q. ~3 [3 d* S d& Z. x
- exit(1); ) C; {7 N- { x" R; N' g
- } Y; C- x6 P* i# h! M" X; @7 j
8 d2 O( [' l) f9 o. ~0 X4 v+ C- char file_name[FILE_NAME_MAX_SIZE + 1]; ) ]* u$ H8 B7 a/ g* X! h6 i* o
- bzero(file_name, sizeof(file_name));
' A: n' W* o# e - printf("Please Input File Name On Server.\t");
b+ F$ S1 r2 R+ y1 l3 D3 d1 Y - scanf("%s", file_name);
" }, W- F! f% r3 V2 e9 ^ - * B( h) m9 l& r' y2 m
- char buffer[BUFFER_SIZE];
: G- h* k0 A$ a - bzero(buffer, sizeof(buffer)); # U1 L$ i8 n& @* [( [7 R- ~$ Z
- strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name));
" _* W# V) v1 z& r& S: Q; l - // 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 + F3 i2 e; V# q1 g
- send(client_socket, buffer, BUFFER_SIZE, 0); - w8 y5 ?# R" F' |, K
5 c" r4 c) R% \1 a, a1 ]5 t, A- FILE *fp = fopen(file_name, "w"); 4 ?4 e% z# E, e, [
- if (fp == NULL)
* G" @3 A6 r H0 \) k4 O - { ) ?2 k: a+ N" p& x1 d5 m \
- printf("File:\t%s Can Not Open To Write!\n", file_name);
' E7 n/ ~1 a5 ]! C. M v! [ - exit(1); 3 `: T4 l! B4 N. N. m
- }
1 r" V/ K; `4 c) Z7 A' f - / W ~( b6 ^% u$ d" D
- // 从服务器端接收数据到buffer中
; x& L+ d7 P+ K, P/ C8 y6 o7 V - bzero(buffer, sizeof(buffer));
6 C& |9 V, O% u; G, g) g5 F/ k - int length = 0;
( V/ t9 T2 ~: U) `, b m/ V - while(length = recv(client_socket, buffer, BUFFER_SIZE, 0))
. X! Z' s2 k1 ?4 v' ^ - { ) P! K! N8 @0 c& N3 |$ D# x. t
- if (length < 0)
& K' }( l; b( | - {
% J4 U9 p! I4 X s! H4 R - printf("Recieve Data From Server %s Failed!\n", argv[1]); 9 }! \ G' j' N& u6 P* Q
- break; ' q) S% X# z ]3 k
- }
; M8 q$ \* b! J; b
" ~. V1 a& k; z# Z( L- int write_length = fwrite(buffer, sizeof(char), length, fp); * f# E1 }# W% n; r d* E5 S
- if (write_length < length)
7 J3 F$ G% L$ z/ y1 l - {
: R- x5 n" m- ]) i8 N' i$ b - printf("File:\t%s Write Failed!\n", file_name); , ?4 m* L! K- b8 B0 C4 R' z. ~* M" l
- break; , x( Z/ I/ r, n# \
- }
: H. ]$ C8 y2 v - bzero(buffer, BUFFER_SIZE); 5 ]" e# b5 K* o
- }
/ |7 }% H- ?( M% i& D% _ j# Y+ f
* o3 C/ j; V2 s9 [! [- @- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]); 7 |4 ^5 x+ D3 W
0 ]- Q/ S2 Q" l! H" M/ N- // 传输完毕,关闭socket . T6 C$ E6 g7 U: h5 c$ e) }
- fclose(fp); " { v% W5 ~/ r5 o3 E4 `
- close(client_socket); ( Q0 Q/ {) q3 P: Y& Q! d
- return 0;
/ d% m3 H! v% s* d7 |+ p - ) D1 d, K# |8 y$ F" |
- }
! d8 Q) `7 ~/ t- F( |$ O. G! ]9 h
$ j& c5 z; C6 H0 B7 w( S
复制代码- /*server.c*/
^- ]' f: ]- v { - #include<netinet/in.h>
0 E( b: X9 \" p B1 ` - #include<sys/types.h>1 p8 m; _9 i# ?, c5 _
- #include<sys/socket.h>
, o( Z2 w3 X$ u( p* n - #include<stdio.h>/ E- o4 l2 }1 k' j
- #include<stdlib.h>8 v" i6 j4 }& Y$ [, h
- #include<string.h>9 V- R" q5 z- [" J l0 Z8 _3 z" }3 n" Y
- : M. T/ L) ?( f% o( Y" ?) {1 s* A
- #define HELLO_WORLD_SERVER_PORT 6666 //端口号
' e8 |9 L& C1 t5 r - #define LENGTH_OF_LISTEN_QUEUE 20
! n/ R) I- I' V7 `/ e& [ - #define BUFFER_SIZE 1024( @6 {" m5 p% y; f1 v5 D) H$ u
- #define FILE_NAME_MAX_SIZE 512
' x. F9 \) _ {2 e
( [# {5 m# g# d- int main(int argc, char **argv)
/ w$ b, M3 V- b i0 n% w- \) |2 H - {; j! x, d4 { S( ]. k
- // set socket's address information
( x! M E" M+ }% K5 z/ } - // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口
0 t5 f8 U; X2 @% P+ [4 i - struct sockaddr_in server_addr;
- d3 y' f+ D( b - bzero(&server_addr, sizeof(server_addr));
! l1 Y* M0 j' S - server_addr.sin_family = AF_INET;
8 `7 f/ T8 Y/ a" E+ m1 x3 E6 B0 N5 | - server_addr.sin_addr.s_addr = htons(INADDR_ANY);8 o' |9 ?+ h; D/ L. K
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);9 y8 K! n, J. A0 y" x O
+ P6 e: F0 P1 }* W) w# B; Y- // create a stream socket3 M" W0 M, x2 q' v/ q V
- // 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1 G/ n, u O7 M
- int server_socket = socket(PF_INET, SOCK_STREAM, 0);. m3 X4 {2 |- T+ h0 x& ]- j
- if (server_socket < 0)5 x% D/ ]( s% o' B
- {
" T4 Z5 s3 X$ m; q. l% |: b1 l - printf("Create Socket Failed!\n");
e$ d- R$ T# ]( z( v9 x1 B! V - exit(1);
* H; F$ m& a( E: d1 q! k - }4 o( K0 g R% l
6 L+ \2 U+ E+ z7 h9 F- // 把socket和socket地址结构绑定
& R- I1 d& s; q/ b8 } - if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))
) ^7 m% T3 Z& c+ o; [% R* P - {+ N: |! A) |2 s$ V2 K9 ` @# D
- printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);$ B/ E# v" i2 \
- exit(1); }4 y' O. h" r2 X; I+ o. \! K
- }$ o4 p1 }4 n5 [- l$ w( d4 j
% |0 s3 H9 x* `# |- // server_socket用于监听
- q/ f: x/ `% v9 R - if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE)): r4 v/ y3 B* E& t: m$ ^. z
- {6 u1 `8 R! e( H
- printf("Server Listen Failed!\n");
' z+ Q3 e! _* ]8 K - exit(1);1 e; {8 O4 B& [
- }- ]8 ^# I; A$ v0 q4 x$ i
2 ?0 E2 C) C+ \& \# \+ n- // 服务器端一直运行用以持续为客户端提供服务# o# I( l! t1 [" g% C
- while(1) x$ J7 S6 X4 h7 K
- {
2 j+ H( L/ u4 z, ^ - // 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' k4 B6 r! g4 H# u- `- Z
- // 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 g: Q& E6 c5 ~ - struct sockaddr_in client_addr;
" M) V; S8 T4 J$ f* ~ - socklen_t length = sizeof(client_addr);. M3 s) `! O1 {1 f6 j
- 2 O' r) ?: U) {. n9 Z) V/ R4 `
- // 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( j ?& k/ k% ~4 g" p( G
- // 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
% ~* } y5 f8 k" [0 {; n! S ]! N - // 用select()来实现超时检测* J5 b* C- Y, Z% k. \
- // 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. Q' F9 `( F l! z
- // 这里的new_server_socket代表了这个通信通道
2 T( U% L* T3 ~5 q/ S; V& o, o - int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);
4 N1 i7 ` K* N$ b - if (new_server_socket < 0)4 h. B% x0 W7 M7 t; q0 I
- {1 a# ^5 x Q2 Q K2 P9 r4 [7 @6 G) F) S" L
- printf("Server Accept Failed!\n");* C! [& T f% t$ q5 P$ H
- break;
h- a' v5 W. g$ J9 `6 |7 q - }
2 {. E4 O3 r( V/ g' ^& b5 Q8 `
& _$ i8 l4 \9 ?0 ]1 ~- char buffer[BUFFER_SIZE];3 S( K' [* `' i$ D5 M! O/ O
- bzero(buffer, sizeof(buffer));
; L" ^9 e+ j, Z, V - length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);: s- T/ g+ S: v: Z% F
- if (length < 0)
; M, M. N8 Z2 j1 P* c - {
% y6 T& b1 A3 |5 x; F: k - printf("Server Recieve Data Failed!\n");9 [3 R0 w( D! }; Z/ L+ S v
- break;
4 |+ n: _4 q1 h) D% \# U8 Z - }
" p V, X6 Z: m- y ~ - # P( |! }1 s- o( W a' U
- char file_name[FILE_NAME_MAX_SIZE + 1];. m5 E) l# C* k- p! @
- bzero(file_name, sizeof(file_name));
' \1 u: @0 E$ i- l! s4 m: ] - strncpy(file_name, buffer,( W- Y: ]- U! g
- strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));& f' K- m5 n: c! H- z
- & T- g1 }1 |# i0 P" f# _
- FILE *fp = fopen(file_name, "r");
1 S( `! U1 H& L& M - if (fp == NULL)
$ @9 p4 b5 z0 O( ^+ |/ q - { p! f" e. _( j1 q! l: `$ [
- printf("File:\t%s Not Found!\n", file_name);6 O" D1 n- `4 V5 ?
- }+ I; j& {3 g0 J
- else, p0 T; O3 B3 B6 W8 ^( Q' i' [
- {4 w9 S; `# g+ m& A" k' a) H
- bzero(buffer, BUFFER_SIZE);
' [5 F% R4 @/ e+ l7 T, o9 K - int file_block_length = 0;
' z$ ]' T8 t* h# |( j! x; G+ b* D - while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)
( \4 p( A/ F( f( }- ` - {
5 w* } J" _! V6 d$ }. Z% O - printf("file_block_length = %d\n", file_block_length);( a4 i8 K2 G3 b3 u5 {/ \
) }+ R. ^( [: C- H5 T3 N1 `( @: G- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端! @$ _5 y4 m5 U: j* }( o9 a
- if (send(new_server_socket, buffer, file_block_length, 0) < 0)
j) ?# q! t: C( Z" ? - {5 D5 s! g- p$ b2 S4 Y% C( Z
- printf("Send File:\t%s Failed!\n", file_name);: n! s" {, e j
- break;; f G- A5 {" [
- }3 W, P ~$ _+ f R! I
- 0 L* l. v1 G; G5 k
- bzero(buffer, sizeof(buffer));
. n% o- ~0 x/ o p - }
1 M* ?: `7 `/ f; G! _$ q - fclose(fp);
& b% n9 N- X" o: V9 o1 O: H4 _ - printf("File:\t%s Transfer Finished!\n", file_name);( {4 C% T$ [( _1 P
- }4 J w+ v4 k! Q" O, Z
- ( W0 F3 ?" E# A, ?# @, b4 h$ A) ]2 H/ D# L
- close(new_server_socket);
4 ?9 J7 f" Q3 |) }' Z( i7 I8 P - }% S) k& Q( o# ?( f& w; o2 C
- 0 L9 N+ k" i9 N7 R. ?( _$ V
- close(server_socket);
% d4 A$ s- S( h# i' a
( A# r6 z1 u- h- return 0; @- e; V2 W' s0 T
- }
+ a& v, q% W! E1 q* v - % V; C( v9 H2 D2 }% T
复制代码
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