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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.
1 c# |3 L. G1 V8 v$ \6 V+ m4 H- /*client.c*/
$ o/ }0 A9 i9 w/ W' c - #include<netinet/in.h> // for sockaddr_in ' h% w' @4 w0 c$ u1 E r
- #include<sys/types.h> // for socket
+ b2 z# [/ c3 Z4 t1 L! c. F3 c: t - #include<sys/socket.h> // for socket
/ C" ]& ~2 _- U$ \- `0 b& h$ C& M - #include<stdio.h> // for printf 6 s* Z/ \% _ P Y% {
- #include<stdlib.h> // for exit 2 D; v" z9 b+ c2 R
- #include<string.h> // for bzero
/ X3 ~: S& D0 B9 y v) D - 4 z9 O5 q: I+ X! n
- #define HELLO_WORLD_SERVER_PORT 6666
% ~5 _1 s% D) u8 f- F& Z - #define BUFFER_SIZE 1024 ( _$ R6 v; E# v
- #define FILE_NAME_MAX_SIZE 512
, s9 n! m, K6 f# L' _ - ; u2 N# ?3 V* z( b
- int main(int argc, char **argv) 8 o4 Z8 X s0 @
- { - q1 W2 S* A8 v5 U6 Y" [/ }- N! r
- if (argc != 2)
$ {7 j% k1 ]0 j: u7 Y) G - { , j e' f- j; X [( j
- printf("Usage: ./%s ServerIPAddress\n", argv[0]); ' g8 D1 _6 v5 w! I+ o6 ?! P6 s0 ]# M
- exit(1); e+ [& i- l$ }; i2 E. j
- }
8 I3 b$ g1 |1 K& o
9 d) ?$ [: ^1 t" ?1 C! A- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口
" T; W7 t% B" ?' O7 u6 [ - struct sockaddr_in client_addr;
0 m4 i1 Y6 y" A6 f+ ~ - bzero(&client_addr, sizeof(client_addr)); # v9 g1 n& d# ?; Q: L' Y A* g
- client_addr.sin_family = AF_INET; // internet协议族 7 M( z! N9 _3 L8 Q& J
- client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址 # [+ t V1 n) d9 ^: _/ T: s/ S# i
- client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口
1 s" B+ L/ b4 N# b" v2 J5 D3 v - 8 J7 T* z+ Q* B7 j& z) x" o/ ]
- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket & |7 U' V% U' F- X
- int client_socket = socket(AF_INET, SOCK_STREAM, 0);
1 |: F" g- e4 Z8 o" i - if (client_socket < 0) ' W1 u) l1 W; J$ T; s% K" Y4 F
- {
8 x& c8 U% c8 k8 {# F# ^1 a - printf("Create Socket Failed!\n"); ) L& u$ d% }; ^! [9 D% d: \: I( c
- exit(1); 8 e7 G; V7 ]' g$ _
- }
4 G, g/ B7 }; O N3 K4 H
( ]( s8 `2 ~6 a& p" |2 A- // 把客户端的socket和客户端的socket地址结构绑定 % j7 b5 `; G5 M4 }3 \
- if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr)))
. \# U2 Q5 E: f1 J6 g - { 3 r1 r* |' p8 F3 {$ Z2 m, N4 H2 t
- printf("Client Bind Port Failed!\n"); . ~6 X, f! Y, T, R' L
- exit(1);
7 q/ j4 n/ x2 P3 V4 n$ M6 x5 U - }
% F9 z) d. C; {& K: v
; q8 [+ e9 G- C& Q- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口
8 J# v9 K# e4 v4 N - struct sockaddr_in server_addr;
1 @. p5 D# x+ z5 |- x6 D2 Q - bzero(&server_addr, sizeof(server_addr)); y2 P6 A$ q' E2 F# H; j
- server_addr.sin_family = AF_INET;
: O6 b) ]; e `- N0 | - 5 g9 H! }7 t/ H9 F3 p5 E
- // 服务器的IP地址来自程序的参数
2 O- u0 O9 O3 D+ D - if (inet_aton(argv[1], &server_addr.sin_addr) == 0) ; {- c' y' \% D( o$ I
- {
& l' b+ b; f. ^" U - printf("Server IP Address Error!\n");
& G! f+ A0 p. c- G ~- b9 W; T o: \ - exit(1); 8 r6 f. @4 G: g9 [; ~1 Q
- }
* `( R( V, K4 u, G8 H - ) f$ f. C- r0 g) s o' i2 |
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
% y W& X, y" b - socklen_t server_addr_length = sizeof(server_addr); / d) v( I. `2 [( Q. u
- ! Z! I+ M+ i" M9 W5 F, S( p
- // 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 5 j/ M( j: `& ~
- if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0)
1 R$ t* S% p5 v - { 5 `3 m4 |7 Q: a4 Q% h
- printf("Can Not Connect To %s!\n", argv[1]);
4 Q" v) `9 U8 g$ i( h- z! j J - exit(1);
8 a. } q& ]# f - }
. l" W6 C7 c1 {/ | {9 r - 2 [8 q$ [$ q$ ]( p/ @: ?- q1 B
- char file_name[FILE_NAME_MAX_SIZE + 1];
% J) n) ~2 P* [! f - bzero(file_name, sizeof(file_name));
7 f& \/ Z" ]8 m - printf("Please Input File Name On Server.\t");
+ F$ ?1 ?; j0 J d- _; M - scanf("%s", file_name); b0 y8 c$ k: L1 m! K, ^7 |3 q# r
& d% W4 x) a' p( O) q5 z- char buffer[BUFFER_SIZE];
9 m% I* w8 |9 M - bzero(buffer, sizeof(buffer)); 1 a- G a' d2 Y- O" I- B- Z/ S
- strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name)); . l% |% [6 r9 v
- // 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
' V4 i3 d" p- T) \: d3 P! y - send(client_socket, buffer, BUFFER_SIZE, 0);
* k2 T& B- g7 F0 J - 5 m/ q2 F& O/ C: Y
- FILE *fp = fopen(file_name, "w");
! c1 k% A8 F+ W3 J8 p7 ~: H - if (fp == NULL) 2 y; w! d! d9 l9 `3 f
- { 4 R# Q$ C) S% D, g
- printf("File:\t%s Can Not Open To Write!\n", file_name); & E2 Z3 T5 Z" k/ s
- exit(1); 9 F" E4 `8 w/ Y; ?
- }
6 K# R6 p6 _7 D a5 r/ M6 a0 f - * g1 N5 w- G+ P' d$ G! v" y
- // 从服务器端接收数据到buffer中
5 V: |+ Z }: u' n - bzero(buffer, sizeof(buffer)); 8 }7 [5 g& R& y- r4 l7 k
- int length = 0;
- u m, ], @5 ~ - while(length = recv(client_socket, buffer, BUFFER_SIZE, 0))
( |- D B0 h: m, y% l - { 2 Y8 B( C7 H) y* O+ a+ H
- if (length < 0)
" ?, r4 u/ {: t, T. p0 R# L - {
X4 M& U, T* I+ P- a* l1 @, T - printf("Recieve Data From Server %s Failed!\n", argv[1]);
$ A; E& Y5 c7 Y( o. ]+ P& v - break;
4 f0 d [7 Y2 t/ G7 d; n9 Z; j - }
$ f6 z0 ]9 z0 e - : D2 E3 q, U/ c" c; W A, U
- int write_length = fwrite(buffer, sizeof(char), length, fp); ( e3 z: w9 T+ k* g% ^5 C4 A. |
- if (write_length < length)
( K( J8 ~0 @# f% ] - {
?6 |: h' Z; Y: ~: Y - printf("File:\t%s Write Failed!\n", file_name); : o0 Q% W, ^ i' Q7 l
- break;
4 W+ r" \4 Y1 t- t( ^1 n: t - }
! A1 u2 J/ ?1 b2 _ - bzero(buffer, BUFFER_SIZE); 3 \" n g: ^( ^1 L) H. E( f6 Z
- }
% u0 f( Y# `. i
9 b+ B/ y1 F; P/ _8 P. o, I- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]);
z: f* }0 u/ v. }$ N' U& U
s |) V! H w2 B9 ^- // 传输完毕,关闭socket 1 ]# |" J2 u- q0 y& M2 Y
- fclose(fp);
, M# K; v$ p t$ d) F0 k3 J( J - close(client_socket); X% U5 v1 P" {# O3 S
- return 0; ( t* Q+ I2 m0 P$ ?) i
, C* p7 V% L" H0 j! m. X6 P$ r- }
- B7 Y8 d& P" D3 y; Q- x, }+ \$ t - 2 X7 S# w" H8 `! ~- D* e$ B
复制代码- /*server.c*/" t$ \$ x. P. Z1 I b4 c7 Q
- #include<netinet/in.h>
$ U" c5 D7 R/ y! a8 f - #include<sys/types.h>2 _3 p- e" q' G# t% r& q" r
- #include<sys/socket.h># L- O1 l/ e$ V6 |
- #include<stdio.h>! D# F3 Z. b3 v3 I. o5 R/ N9 A* ]& O% @
- #include<stdlib.h>
) G0 o. Z+ S/ q% n - #include<string.h>
* f! Y; y4 A4 T' ^5 d/ b
4 m. q' S/ I& ^- #define HELLO_WORLD_SERVER_PORT 6666 //端口号/ o1 `$ ~9 t+ x: o
- #define LENGTH_OF_LISTEN_QUEUE 20
% {2 r% H4 s; p; L; I4 F2 Z+ U1 w - #define BUFFER_SIZE 1024+ L0 n* k6 G( {" R* \
- #define FILE_NAME_MAX_SIZE 512/ w. y- @% |& o. K
- / G% R! O' Y: y* r! U
- int main(int argc, char **argv)* a3 Z# B5 r: y! ]0 b J4 E
- {
: S% h: Z% T# a# R" s - // set socket's address information; k! I6 `& J7 y/ T$ q5 Q
- // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口; ~- ~! ^3 R* w. C, }: H
- struct sockaddr_in server_addr;
* g/ r) R( {0 R% D, I6 W# f - bzero(&server_addr, sizeof(server_addr)); ]( h9 m! q( }2 r7 |
- server_addr.sin_family = AF_INET;$ c2 A$ e! U, x2 B ^
- server_addr.sin_addr.s_addr = htons(INADDR_ANY);: r) w. g! Y# z
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
5 \ ^) e: j5 N
2 J7 s$ Z8 C- e- // create a stream socket& ?& q4 D' ^4 H! M# }
- // 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+ Y z9 \/ I& b: H/ f; T, I
- int server_socket = socket(PF_INET, SOCK_STREAM, 0);
$ u9 d% ]6 f- }/ s# ? - if (server_socket < 0)* n. ]8 ?* L; h; r6 K+ S. I
- {
% W& N) N3 k" U0 o - printf("Create Socket Failed!\n");6 k8 P+ Y% u ~6 h2 X
- exit(1);' S1 |3 [- k& a7 k$ f
- }
5 u8 s! X7 _% k! ^ - ) X( \1 L& }6 [4 ]7 ~
- // 把socket和socket地址结构绑定
& A1 y3 a! c# d* f& z - if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))
- |& C2 g' o7 ?) v - {8 o' g9 V. F H/ Z: x- Y$ _
- printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);
* b1 R8 y5 u. {7 }# m# l - exit(1);. j# Y, P* u0 i& p& V: v/ q
- }& P; r& ?4 `- W4 L/ i& v
- & {0 F* s: `+ D2 ^2 l u# e
- // server_socket用于监听& D0 W/ K" `) E* _5 B. k* K4 X
- if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))* F, ~$ }6 s, O
- {
5 Q5 h- Q. V# y - printf("Server Listen Failed!\n");- a+ b' z6 I! U+ @
- exit(1);
# T7 `% Q9 X; b& h+ J, d8 u5 B7 R. U - }. b2 W V4 J" Z+ R9 d' n
& j5 k- E N9 ^" j6 a- // 服务器端一直运行用以持续为客户端提供服务
6 m' n# H2 ?+ B) x0 o: O - while(1)
- J4 J C- T9 K$ n0 b' j/ O0 T" R3 [! Y - {
- ~7 B2 Q4 _( M) h( L6 }+ s/ |- h - // 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
; E2 S) S6 c+ H, ^. h - // 接受此请求,同时将client端的地址和端口等信息写入client_addr中5 w+ c3 j: d& m- ~
- struct sockaddr_in client_addr;
8 X5 O4 @3 I. ^ - socklen_t length = sizeof(client_addr);% D4 p& y7 q3 t
- ) T0 m, Q2 \. C) x' g ^
- // 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
. r. v7 @$ V. E - // 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
- T5 i2 y7 O9 x- x9 h6 O! f* y - // 用select()来实现超时检测
- Z5 P2 B* O& D) w% d' B - // 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& E6 O% h- v6 W
- // 这里的new_server_socket代表了这个通信通道 \! m# ^* z* c7 c5 @ [1 h9 n1 Q
- int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);. s/ t! I( ^( a) a h
- if (new_server_socket < 0)+ y5 l2 v6 _8 k% ]* U1 @
- {
) i. a: C+ F; z* c5 y - printf("Server Accept Failed!\n");
# h" c9 E& u# z - break;
4 t, B+ j/ F6 X8 H - }
, K1 n; ~% F. T$ y
# p& I4 X) t7 |0 F# {* c* `' ~4 b- char buffer[BUFFER_SIZE];8 ?+ S8 R5 ^, b
- bzero(buffer, sizeof(buffer));
2 T0 E1 s ~% C. S! E9 a+ w - length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);3 \# R ], ]% ^* r0 e0 L) p
- if (length < 0). o9 U7 L9 V _
- {
# R5 K- O1 v* T1 k - printf("Server Recieve Data Failed!\n");$ F0 t& u: B: r! s; @! `# }% `
- break;3 U V8 ^( W% C. X. `
- }$ K- l. S; D$ H
- $ e: f- O* Q0 h6 _: _
- char file_name[FILE_NAME_MAX_SIZE + 1];) Z7 u% W& f. ^$ R6 I
- bzero(file_name, sizeof(file_name));
& X+ v1 `0 A" @5 g - strncpy(file_name, buffer,7 Z) |! M- ~3 Y7 b) C# G
- strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));
; x5 ^6 L/ B& `& \2 ^2 y9 e: b
6 u8 g7 [1 A( r4 D& O1 B( M% x- FILE *fp = fopen(file_name, "r");0 _9 I& U' h/ z# V
- if (fp == NULL)
0 j% v3 ^' f& p. l9 y - {
/ Q' t# F2 O7 N: o' M - printf("File:\t%s Not Found!\n", file_name);" ^! p! L7 a1 k/ Q
- }
1 E5 g/ a" R. a; J0 Q( L5 s3 A - else- A' B% p [& z1 k2 _8 [0 v4 N
- {2 D- a& E, c7 h3 U! M
- bzero(buffer, BUFFER_SIZE);
) g& q+ F* |5 j# } - int file_block_length = 0;
# c/ L2 q) x. ^, a9 V* B& n- A - while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)
6 _8 L# L/ y7 m! g1 K - {3 C B7 ]9 l* g- f8 o$ _
- printf("file_block_length = %d\n", file_block_length);3 ~0 s1 T6 f# Z) J' M4 J3 p# C2 ^
& G2 M0 q( |) X5 U3 F- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端( Y D z' Z5 R! T- M. b* i( b
- if (send(new_server_socket, buffer, file_block_length, 0) < 0)
8 k" f6 Y8 \8 {9 `3 c8 K8 J# A - {9 r: _% P8 b+ a. f+ N! L9 i
- printf("Send File:\t%s Failed!\n", file_name);
0 B; |* T) ?: ] S+ p# [9 M) \2 A0 Z - break;3 j1 c; D6 I6 H$ f1 {) y
- }# z$ i) }% O! x& n+ t' E) ^( D. I
9 S9 D& z" a# `# | f' ]- bzero(buffer, sizeof(buffer));0 j5 C2 B# _# \
- }
' S. ?6 @% D" O' P. T% o: d - fclose(fp);- Y i& i1 a3 _" T$ H
- printf("File:\t%s Transfer Finished!\n", file_name);
0 ~3 X' e- A- O' ^; }4 c: ~& _ C - }2 J+ E7 J8 Q( F: u2 V% `8 [
- 7 {, k, X7 S& V+ P( }8 _
- close(new_server_socket);
/ V4 d" e) w( U' e" }4 V - }4 L$ i9 w8 u L. a6 t' m' [
6 r/ x$ E9 Q; x5 _- close(server_socket);
5 X0 G5 G! L4 P" x8 I
/ s; t9 F$ e) S* t( Q" W- return 0;2 @+ Z5 v: _0 |7 f
- }' F7 ~# N. q/ q& Z" ^
, B/ \9 Y' m9 B0 ~8 N @6 J* `
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