管理员
   
论坛积分
分
威望 点
贡献值 个
金币 枚
|
沙发

楼主 |
发表于 2020-5-9 01:48:09
|
只看该作者
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.
% {! Q" Y( o4 k3 v/ [6 b% H- /*client.c*/; ?/ p5 x; M6 _
- #include<netinet/in.h> // for sockaddr_in % t$ u8 R# _1 j# `! ~/ R' G8 X
- #include<sys/types.h> // for socket
) r; D# j1 c' D/ I. l - #include<sys/socket.h> // for socket . [7 I: F% Q! Z
- #include<stdio.h> // for printf
/ ^/ ?( S/ N1 z& G5 v3 c - #include<stdlib.h> // for exit
# Z9 f: [5 c4 Z4 O/ l& U k; C - #include<string.h> // for bzero
2 n7 S N" Y+ A3 l; f. `. Z3 _3 J
! s3 w3 v3 m1 Z" Q" B- #define HELLO_WORLD_SERVER_PORT 6666
6 {5 H; D6 q, K% a9 d+ @ - #define BUFFER_SIZE 1024 8 q3 c9 V7 G7 r" v4 z
- #define FILE_NAME_MAX_SIZE 512
7 j7 X* b8 V* ^1 t
& f; P X" v! f- int main(int argc, char **argv) s7 z9 E: D+ p0 \8 x# d
- { 5 c& r0 ?& B/ f: t3 P3 U0 ~
- if (argc != 2) : j) r: i3 Y% x$ O2 ~
- {
" _/ T; }9 ~( f - printf("Usage: ./%s ServerIPAddress\n", argv[0]); $ f; _3 p S Y( u& |! E) `% g
- exit(1); / J. ]8 \* \6 m5 L; y
- } ; a. T& u$ T8 ~, T" P8 o
- " B$ X! P5 `' U% T; @# P; C
- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口
, a- J- @* T, A4 d- ?3 o" g5 }8 B - struct sockaddr_in client_addr; ; P6 e- R/ a7 y+ l x
- bzero(&client_addr, sizeof(client_addr));
" r2 N0 M$ ?# Y5 K - client_addr.sin_family = AF_INET; // internet协议族
% ~! b! z. o$ J: S$ o% C5 n - client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址
$ d' S1 S7 y7 y2 h. ?( E - client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口 9 g* Q$ c( `$ J9 n( ~
- ( k* s7 k8 `" B. X1 }' i, ^: R
- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket
$ j$ R& \0 F, e+ X; _7 y/ U7 V1 K - int client_socket = socket(AF_INET, SOCK_STREAM, 0);
$ @* R! Q5 [5 ?5 G1 ?- i$ l - if (client_socket < 0)
: x( y$ f/ e* @% x6 I4 Y - {
* B% w' x( R0 F# D4 Z9 ^3 x - printf("Create Socket Failed!\n"); ) L% i9 ]( Y9 w7 K7 N/ ?0 o
- exit(1);
- B6 j) f' @' k - } & x$ h! A* k* \. N: N R! X
( U3 [$ z2 x4 {$ U5 i1 d! p- // 把客户端的socket和客户端的socket地址结构绑定
9 g/ C+ |7 o, W8 n/ R8 P - if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr))) $ t* H) z9 e; P* M* J
- {
% M8 ?0 j0 [' i - printf("Client Bind Port Failed!\n"); 1 e. u, t) g4 M1 r- q! r
- exit(1);
. W* X! o, U. X7 _1 Q% q- N - }
' x$ v& Q' k5 f - ( w L! O3 X4 T- L* F, ^+ y
- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口 4 C4 G5 N# s5 F: E: U+ o6 W: p) f2 z
- struct sockaddr_in server_addr;
3 J7 k5 a) [" l2 w* t2 w5 M, c - bzero(&server_addr, sizeof(server_addr)); 3 A' E/ [2 |5 E" E0 T" X
- server_addr.sin_family = AF_INET; * m5 p; n6 b7 ~& q$ H8 X
( ?# s5 K e* r7 d9 Q$ `8 S1 c- // 服务器的IP地址来自程序的参数
. u. ~7 u9 H7 m d& K - if (inet_aton(argv[1], &server_addr.sin_addr) == 0)
% Z$ ^& ?: L- C, h; q - {
- h1 l5 A/ r5 M4 z( {1 [- Q - printf("Server IP Address Error!\n"); C4 }/ ?# z. e. i" B
- exit(1);
8 Q, z( Q: ~# S" S) d/ f - } 1 R. Y9 A) a' ]3 S
) g5 D8 }: U/ B6 x* Z8 j6 v5 B- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); 0 ? F) R7 C- Q6 I) b. F1 ] W
- socklen_t server_addr_length = sizeof(server_addr); + t6 {4 E* o% f9 ?( K
- 5 P' d7 ]* t# }8 T
- // 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
8 F- A' r/ }. h( e5 k* ^0 b - if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0)
3 J% _# `# M; S: r3 C3 r1 z - {
7 x) K# x0 T6 g' ?, z H% |- W - printf("Can Not Connect To %s!\n", argv[1]); 0 L* t% j8 c2 T U4 H. F
- exit(1); # h" {$ J' p) t' s+ @& _6 g+ e
- } 4 \" G7 x S) w& G
- ' X$ Z* W1 P. X" c
- char file_name[FILE_NAME_MAX_SIZE + 1]; ; [: N4 v2 Z5 o8 [7 ]% A
- bzero(file_name, sizeof(file_name)); . |2 A% `& e) \
- printf("Please Input File Name On Server.\t");
- M& V& D8 p3 e, p' M - scanf("%s", file_name); 1 D1 r) `) l$ o! i9 h* j
- 1 O7 m E% K" @$ f3 F( m" Q u
- char buffer[BUFFER_SIZE];
- Y5 s8 D- Z& {9 J1 L0 w$ P - bzero(buffer, sizeof(buffer));
& k& @2 t6 [! I$ d - strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name));
3 z( c% W, ~2 [2 D - // 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
& M+ n- T4 u/ R* }& t: Z$ A - send(client_socket, buffer, BUFFER_SIZE, 0); ( A1 b$ X8 n$ {) V# |2 Z
- # ~: c3 o; C7 {* s$ u) P
- FILE *fp = fopen(file_name, "w");
8 x+ B8 G% ?4 [ - if (fp == NULL)
' F$ `+ t8 u9 B3 | a* ` - { ; Y# b" @. Z3 I; }( B5 A1 \
- printf("File:\t%s Can Not Open To Write!\n", file_name);
3 f1 t, H1 k R s - exit(1);
& J8 o5 h7 g U( w' L - }
' k: h- a! i$ h& X/ v - 4 w- z7 I8 M3 G( o7 Y
- // 从服务器端接收数据到buffer中 , c, p( n, C+ {
- bzero(buffer, sizeof(buffer)); ( `& M: j0 v$ z: F! [
- int length = 0;
- p2 A9 G; J3 } - while(length = recv(client_socket, buffer, BUFFER_SIZE, 0)) - H/ J% ], Y2 O! Z" U8 B! S# V, Z
- {
9 Q9 B" M6 {9 V# l. Q' @ - if (length < 0)
+ ~) C/ P% E9 [2 @) @. w - {
1 n. l$ N3 v- T# D - printf("Recieve Data From Server %s Failed!\n", argv[1]); 8 k; Y2 W& \( W" g/ d0 N
- break;
6 r1 H/ k- v; @* \ - }
3 @6 l6 _: {, Z - 8 L$ H" \; e% A/ x
- int write_length = fwrite(buffer, sizeof(char), length, fp); - ]7 x, d- i8 Y+ ?0 f% v
- if (write_length < length) " b1 ? P0 ^, G& b1 j4 p; D; _) ^
- { ) S3 y7 }, J7 W. b# Q: ]
- printf("File:\t%s Write Failed!\n", file_name);
- p6 }- m( _6 n! T: g$ u - break;
, q" e1 \- Y- C/ p; h( @ - } / q" O5 F7 f1 [" U0 E
- bzero(buffer, BUFFER_SIZE); 8 e& { t A0 H
- }
9 G8 H4 j4 h- H - 8 b7 D2 A3 K7 ~2 X0 @+ v& a- T
- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]); 7 C) x s; }7 j; C- I6 j o
9 _) L6 _- z! F# q. v" J- // 传输完毕,关闭socket
$ F( C) @! Y7 I$ y1 z - fclose(fp); 2 o2 p& r' N8 G) {, G1 b3 G
- close(client_socket);
5 p% V# i, s3 g8 _4 W: Y r - return 0; / p3 l' m8 m: Z/ w5 {; U' s
- ( R; g8 t; A: H0 f
- } 9 }+ J; C7 t- F
5 T9 b4 K( ~+ F% ~+ p
复制代码- /*server.c*/
}2 p! B3 W9 T+ M1 a - #include<netinet/in.h>% i6 S4 `1 [: W* S" Y
- #include<sys/types.h>
3 T3 D3 O; M4 |6 q9 U* d, E2 f - #include<sys/socket.h>
4 o! ~ D- w! f& S6 Q2 s K - #include<stdio.h>
9 }7 _* f1 J( k d8 ^9 n2 ~! Y - #include<stdlib.h>
+ C0 P) N. ?2 p) u/ G - #include<string.h>! N0 G$ @& u7 p; L
- 7 {, D& Q8 m ~+ }+ ]
- #define HELLO_WORLD_SERVER_PORT 6666 //端口号+ `% s4 k9 c k8 v' Y
- #define LENGTH_OF_LISTEN_QUEUE 20
. L+ _7 r/ h0 B8 g - #define BUFFER_SIZE 1024) L, G; u. t; p+ S
- #define FILE_NAME_MAX_SIZE 512
( x; p) Y& ~3 i
* A, [8 G" Y' q8 p' V- int main(int argc, char **argv) ]6 s$ R+ N& t' ^
- {
3 Y# n$ R8 N8 q6 P - // set socket's address information& `6 t6 P' C7 @- j7 f1 B
- // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口) |2 E( R) I+ m$ m3 ]7 ^
- struct sockaddr_in server_addr;4 ~, a2 d+ S( R8 b1 j7 d
- bzero(&server_addr, sizeof(server_addr));/ M5 h9 R3 X% P Q8 u0 p
- server_addr.sin_family = AF_INET;& B0 o" N, Q* k I- G7 j$ p$ [
- server_addr.sin_addr.s_addr = htons(INADDR_ANY);% q; e" i6 o n- \: n; N$ n
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
! R H$ A9 u( d) S1 j) v: |4 D& z - _3 o+ g' j9 V1 t' r
- // create a stream socket
0 _ i& z% _$ [1 O/ D$ B - // 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
5 [0 K: k) t0 e! t - int server_socket = socket(PF_INET, SOCK_STREAM, 0);9 `$ D; G% M% u$ }0 @: u, [
- if (server_socket < 0) h2 C2 W l& ]: \ e
- {' K" i9 w$ u1 ^" D
- printf("Create Socket Failed!\n");
& L2 V9 a: a: g. g - exit(1);# A3 p6 p9 Q o
- }9 q, b1 u% a: Q7 r# _; l( R
# b4 O4 n1 N2 p3 d% J; J, K- // 把socket和socket地址结构绑定# D4 j" O+ l; j1 ~8 R$ d" |/ n
- if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))
9 Q5 n# [; Z( A; y* C - {
0 X* T' b2 d: _+ { - printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);3 z N8 E- V8 E1 _. \( h# y
- exit(1);4 G$ j6 w( }, @! y# k' y
- }! ^8 g7 s8 e1 O! D3 y" J
- * H; _ |5 G1 a: l! w6 p
- // server_socket用于监听
4 a+ k7 f# J# D3 Q9 X% C - if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))
' e" M/ G/ t2 E$ H/ z- H - {6 h: S0 j( H" k D
- printf("Server Listen Failed!\n");
$ ^6 j/ s4 N3 K+ n1 c: q' L - exit(1);; \3 {1 u o3 B$ g1 z$ x, q
- }
- m* f& v) W/ E7 M: @8 z5 A - + y# P0 T5 f! _6 M2 o% E+ ~9 C2 W# b# n
- // 服务器端一直运行用以持续为客户端提供服务 U9 J. }2 d3 A' D
- while(1); ?- M) ?- s7 j( K! R; `' I' z
- { V/ @( @7 _2 f5 y' E
- // 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+ v: R! T3 S$ @; @/ L1 Q8 a$ O$ ]" f* C
- // 接受此请求,同时将client端的地址和端口等信息写入client_addr中* V, j* l% q/ U% C5 o, O
- struct sockaddr_in client_addr;" p7 ~7 H$ d: b) i; L
- socklen_t length = sizeof(client_addr);. _' j4 C( k- G% z. H( Q' R
+ u2 [3 q, w8 m5 A% k ]; p& w, k1 E- // 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
$ e& q. Q) v" z$ e2 \' l - // 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 G0 Q0 k' }+ `- R6 P - // 用select()来实现超时检测- S, r6 E4 k. K5 | Y
- // 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
1 ], W* ? y0 z1 k0 H: C- U - // 这里的new_server_socket代表了这个通信通道7 T) ~4 J( U* ~) s1 U9 U. q
- int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);
% T4 j" h5 g/ G: |) Q+ ^ - if (new_server_socket < 0)* c/ i" h6 K2 A! M+ }, D* V
- {' {" o+ F( H6 ]+ b9 k8 o% @4 d
- printf("Server Accept Failed!\n");7 V. k+ d& ^% C5 q
- break;
* Q) T4 r; r7 K9 O1 m - }
( V, t0 l1 n8 N$ p
% B) D u6 P9 y* H- D, D5 j5 b- char buffer[BUFFER_SIZE];
$ v' Y' Z& K1 X& ~# M$ r - bzero(buffer, sizeof(buffer));
& F0 w, w3 g) m, f% R - length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);
: U p9 |' U! \/ K; w; Q# b, }) c$ O - if (length < 0)
" ~ j& j" H) R9 M - {0 h8 M& a. y) s* w
- printf("Server Recieve Data Failed!\n");
, g) w# ]( F: P7 l - break;3 }/ k: z6 }/ ~, o( f
- }% {" J' V# ^* ]& W# y
5 x# v* d6 v n- r) J" u! n* w5 h- char file_name[FILE_NAME_MAX_SIZE + 1];1 \( u* M/ X; V+ |; z8 U- _% d
- bzero(file_name, sizeof(file_name));
& I y/ Z: U' X0 Q5 S - strncpy(file_name, buffer,* N# Z# X9 @: B6 Z ^
- strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));& P: M1 F; _6 g% u8 O
- + y8 N1 t" `9 w" r6 c4 I
- FILE *fp = fopen(file_name, "r");
8 [& Y! O9 D# M8 |( y; { - if (fp == NULL); p* v$ P6 f; F) A
- {( v/ n. K$ Q, k4 p
- printf("File:\t%s Not Found!\n", file_name);+ t: a- j0 \* t; V- {) Q5 b
- }
& o% [- \$ g( T1 r0 M - else8 g0 p; W* X+ m' n3 ^3 w. v
- {9 h2 g8 ]& q. z$ n
- bzero(buffer, BUFFER_SIZE);9 ^4 a( o3 S- f' \0 d9 B/ B$ R! k
- int file_block_length = 0;
5 z: a' j( B1 u8 j0 d) b - while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)$ F* p# S1 [! q% z
- {
" U# N" b( U& v+ }: ^$ F - printf("file_block_length = %d\n", file_block_length);
: R/ [+ ^8 q2 w+ Z
C! Y _5 J O7 x$ z- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端
4 k8 w' T8 _& o) J - if (send(new_server_socket, buffer, file_block_length, 0) < 0)8 G: P$ A+ W5 [# v1 Z. G
- {
- U0 c$ \: ]+ D0 D0 ` - printf("Send File:\t%s Failed!\n", file_name);
* D3 C# ^; A4 n, Y- k2 U7 {# G/ B% ~ - break;
! ]% a0 Q o3 |) U B - }
+ j0 \+ C1 J' o" | - 6 M3 t" b# J- ^0 j1 i
- bzero(buffer, sizeof(buffer));
' V; e7 b" `! _( O4 f - }
0 }4 r0 E$ H: g+ f - fclose(fp);3 b0 t" Q/ c2 _$ }. M6 @# F
- printf("File:\t%s Transfer Finished!\n", file_name);
% `- z3 z9 i* y - }5 e* M4 d, c% O4 u G
- ( o) B% }+ q- Y) t! r4 S3 E- m* }
- close(new_server_socket);
/ R4 B3 B4 V/ I4 u" M" I$ X - }
" @ M# `# a. r/ J - + A7 H* j! { [
- close(server_socket);
1 M6 Z. K4 L/ X" h0 j - 7 m& j5 Q; e, r0 E% Q" [
- return 0;9 E/ y3 E% W: F7 O6 q9 i
- }* F/ I6 m1 b O0 x* H! [
- 4 N7 I9 }! y- i6 D& h9 J0 {1 y6 h9 ^' A
复制代码 ( J* C2 O6 _" Z$ u/ v" i3 h
4 P5 Q' s y- u; x
/ {3 i- N3 v, n1 R$ b; `4 \" T
|
|