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.9 \) {: z% j$ |* l
- /*client.c*/4 E8 Z, B0 V$ H7 w+ @* O
- #include<netinet/in.h> // for sockaddr_in
, g. P* y9 x3 |. a - #include<sys/types.h> // for socket
% r# C! E$ G z, f+ N6 ` - #include<sys/socket.h> // for socket
0 g; U; _9 [ m, M6 ^' N - #include<stdio.h> // for printf % v8 b: ^0 V; _: f
- #include<stdlib.h> // for exit
# W% y+ c9 @7 N* T9 Z* F# }) N - #include<string.h> // for bzero
. `5 b, X R! y( B
0 u4 g7 Y! w0 s4 x- #define HELLO_WORLD_SERVER_PORT 6666
; t" Q% p- Q4 d( L- I" ?/ u - #define BUFFER_SIZE 1024 + x8 I4 |% g9 Q0 U! b( e
- #define FILE_NAME_MAX_SIZE 512
. J F7 i$ F2 S9 U* Q
, \) `& y3 g4 B( J# I; U- int main(int argc, char **argv)
) t8 r, d+ e- {* w: ^1 |: ^& _ - { 6 a, _' i, X& [, {) D1 K
- if (argc != 2) ) W' L, f% ~, t- c9 C" m) U) `( a, N
- {
4 `. M% [* o L& y - printf("Usage: ./%s ServerIPAddress\n", argv[0]);
0 S' {$ c0 A$ T* U' n9 |. F - exit(1);
; O$ K* |9 R: I( c1 f& ` - } ( [1 C- n9 d6 l7 W6 l q
8 C) x: Y; l7 G1 v! Y6 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 N0 O# {. ?2 { - struct sockaddr_in client_addr;
) O& Q# i9 l$ s - bzero(&client_addr, sizeof(client_addr)); . l; B' X( `. h" d8 e/ b8 \
- client_addr.sin_family = AF_INET; // internet协议族 # J. P" P. F0 {% L, }
- client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址
6 b: n/ g/ V# D* [8 x/ z - client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口
7 D7 s2 _, j9 }$ b: {! q* C - 0 ~3 l$ l. r# m6 t5 _
- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket
; u+ n6 J5 k6 `3 E - int client_socket = socket(AF_INET, SOCK_STREAM, 0);
I$ P5 e" R6 d! L( @ - if (client_socket < 0) 4 m+ W( a+ E% w+ C& F# U) O' r
- { P. n, e/ p( G8 Z$ i7 C8 N# m
- printf("Create Socket Failed!\n");
' E8 H" j5 P# c1 A% k7 c - exit(1); . t* j# A& w6 _0 p& E
- }
; a% p$ B/ G! l - 9 |- I7 y/ b8 H& I0 D
- // 把客户端的socket和客户端的socket地址结构绑定 % n/ b) }8 Q1 q8 l
- if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr))) : ^, T; \( J: u7 e: z$ A1 m2 ^# s
- {
! D9 M8 |- R: c) h) W4 u' r - printf("Client Bind Port Failed!\n");
& m& ^9 I* F1 M* `; q% D7 l - exit(1); , q$ s0 W2 n R1 A3 z: W8 |+ l
- } 4 F2 D* h/ n+ l/ ?" g' p
- q- K) x# k0 ?3 H2 M% }- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口
" N* P; w3 I# d1 D$ P - struct sockaddr_in server_addr;
! `6 U$ ~ [, ~- R - bzero(&server_addr, sizeof(server_addr));
" H S( q8 D9 F" | - server_addr.sin_family = AF_INET; ) x# i3 R7 i6 Y! |; i. W
6 S5 j, U$ ?' C$ V& s- // 服务器的IP地址来自程序的参数
. B! S3 \2 ]9 f y' |% B - if (inet_aton(argv[1], &server_addr.sin_addr) == 0) : l; g) y) i. f+ o4 ?$ T! |
- {
+ z: [4 }( e$ }: V$ N& l" ~ - printf("Server IP Address Error!\n"); 8 A# \; E: \6 U" R/ _& v
- exit(1);
/ \" D5 @) s! T* j9 i - }
1 U8 G4 u/ m N, M2 }. N( T
1 r" t, Q6 l% }7 M6 M- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
1 f' n, P! ?' K) M - socklen_t server_addr_length = sizeof(server_addr); % a8 ~6 ~: g0 n& Q
- - v$ j4 D$ u* ]9 i
- // 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 : ~, E: e. I) P% ?3 }5 i
- if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0)
8 _8 i/ F/ x; L3 ]0 ]- D' ^" o% H M - {
& ~# q4 K/ k4 y% u: u - printf("Can Not Connect To %s!\n", argv[1]); 6 O3 P* d2 z3 y L: O) D5 l
- exit(1); 8 C, ~0 e* i2 F7 x9 d8 i0 ~
- }
8 F$ m" m' l. W# P6 v2 d
: a3 `- B: \- k0 Q% W; S9 I- char file_name[FILE_NAME_MAX_SIZE + 1];
* P" R+ D9 D! O+ v1 [: g - bzero(file_name, sizeof(file_name)); ; H+ J- m3 b2 n2 w/ x7 w2 l
- printf("Please Input File Name On Server.\t"); : j2 B' c: O- R' L
- scanf("%s", file_name);
. [, i l7 k. n% E; j$ O. e' O' o - 6 K& y- B- z: d% b# f. P
- char buffer[BUFFER_SIZE]; - P* J9 \" |2 `/ a3 Y
- bzero(buffer, sizeof(buffer)); 5 B* E. q9 T" ^& I9 J! z
- strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name));
+ {. B; X/ R- L; ]+ D0 I - // 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 1 c8 g+ ?6 {& Q" x9 v
- send(client_socket, buffer, BUFFER_SIZE, 0); , o# U' l: S/ t) r6 ^: Y: r
# p/ \. a% D# H4 p+ l; ?- FILE *fp = fopen(file_name, "w"); ! z/ `7 R$ l( t
- if (fp == NULL) , \* S& ^6 i, I/ N8 `! V0 A, B! _
- { 9 B4 D9 \9 u8 F" ?
- printf("File:\t%s Can Not Open To Write!\n", file_name); $ E* k# T' T0 ^- J
- exit(1);
! h- Q2 N3 j8 \* B - }
" E" x+ E9 G$ Y6 g& G& k" H
5 X; P' w. K) |9 b$ e1 }- // 从服务器端接收数据到buffer中 9 u( |5 U `% z
- bzero(buffer, sizeof(buffer));
) A6 @8 ], t6 }4 C1 e - int length = 0;
6 l; w. s( W+ X! R; O2 Q; W/ m" J - while(length = recv(client_socket, buffer, BUFFER_SIZE, 0))
% o- c+ _ F) h x/ l" q' j& U - {
, r l" i& p& g- T% | - if (length < 0) P- t- F( H; n1 _# c
- {
f+ C3 O6 r8 B2 o8 q0 X2 u) r - printf("Recieve Data From Server %s Failed!\n", argv[1]);
, X* k+ N$ Q6 t1 v+ }% e - break;
8 e, l1 v& }! N. v) D5 w. I. f/ n - } ! \2 L3 c5 A4 V! Z. g* x! \
! z5 }' P k1 U! u. m& k- int write_length = fwrite(buffer, sizeof(char), length, fp); ! `* \: c8 A: p, d1 u
- if (write_length < length) ; ] _; x6 ~5 H, h* a
- { & \0 _. q6 \" q( I
- printf("File:\t%s Write Failed!\n", file_name);
8 Z' V l% E0 ]0 b, y0 ]) r! { - break; % C2 n9 D- X- h ], H
- }
0 b5 q) H. }* K( H2 L: m - bzero(buffer, BUFFER_SIZE); ) z8 ?- T% ^5 I8 r5 J3 K+ ~4 t; j
- }
, f+ f3 ~, `- F. O* c8 z5 m - ) |/ Z0 Q2 v+ G5 P' C
- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]);
" q' ^, y- M' V# H( i
7 R9 |4 o2 Y& n+ \* }- // 传输完毕,关闭socket
. c7 H: i, b' ~: `1 g# e g- ^2 e/ w - fclose(fp); ) `& w, B* B5 Z% ]; ? }
- close(client_socket);
( [6 y" O( W. Y$ E1 ~ - return 0;
8 V8 G5 T9 A6 U, P7 X; r
0 R5 D* M- B+ L- } & @+ g" Y3 V; N
- ; X9 E T/ _% z$ `( H( \1 T
复制代码- /*server.c*/* {4 J; ~* J8 g% e4 P
- #include<netinet/in.h>
2 p Q% [9 R$ `7 c$ D* X& d' C& V - #include<sys/types.h>+ \6 N) f; b5 {4 U! e- P
- #include<sys/socket.h>8 [8 Y/ i: _" ]% p
- #include<stdio.h>
. E+ u( Q. U# N - #include<stdlib.h>
8 v0 Z* D3 ^+ ^3 a5 B( C, B - #include<string.h>
3 R" b- q( {( @5 P' ?9 x - o" F6 W/ c% ~7 K% Q( N1 ]7 b h
- #define HELLO_WORLD_SERVER_PORT 6666 //端口号! T0 Q3 J7 p/ ~/ d
- #define LENGTH_OF_LISTEN_QUEUE 20& f% v' k; \. {9 M' [
- #define BUFFER_SIZE 1024* n1 |5 L; W. i. `" s2 Z, c4 O0 q
- #define FILE_NAME_MAX_SIZE 512
) q5 C4 t t/ A* _5 ^ - ) y+ d& g( B0 H& n
- int main(int argc, char **argv): @' i9 B# c, a4 r/ q3 X c
- {
- u& e( |( ~ B* V- B/ h' S9 B, W - // set socket's address information
4 \; M* {( e$ k: w5 y* i' ]5 { - // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口5 T7 x& l2 T4 y( u9 C' d* N: ?
- struct sockaddr_in server_addr;, _! p# r4 f( d8 B9 E3 \7 I( q
- bzero(&server_addr, sizeof(server_addr));1 H' n8 v5 U% Q: p
- server_addr.sin_family = AF_INET;
2 l+ b3 R4 ?% y/ f5 P/ U" s - server_addr.sin_addr.s_addr = htons(INADDR_ANY);2 v+ Q! m: X; o9 g* t( L
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
6 J+ }. d5 _. z
# ]+ h/ H+ N: c4 J- // create a stream socket
0 h7 K( u; |9 }$ Q# d0 _8 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/ N3 X- W9 m3 m7 F
- int server_socket = socket(PF_INET, SOCK_STREAM, 0);0 ^' _, a0 M) |6 i: k$ U
- if (server_socket < 0)
9 M- |* t* v l7 w% k3 Z2 r - {1 X+ M$ ^( Y. e* z3 @
- printf("Create Socket Failed!\n");& ]% e2 f9 d7 U! Y
- exit(1);
6 P: z: Y; c6 a( Y3 A+ H3 U5 m! M& M6 O - }# D. J. r" I3 `$ d$ X* c; M
- 1 d; _1 w1 t4 \3 Z. m r
- // 把socket和socket地址结构绑定4 C6 n+ d8 B' P' e. f1 ^
- if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))0 D1 O" e0 H1 E. l" O9 Y7 L( E
- {
9 T' b/ a! L8 k/ y- F3 V - printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);
6 }$ u- K4 C' x& \1 K - exit(1);: T. Y) B" C( O& \5 B
- }
5 f3 V& g* I* q+ f4 Q - ! C$ U& j- w0 o/ x" ~; s: I6 T
- // server_socket用于监听. R) n3 j, E' ` W
- if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))
& J2 Y3 s( d) b' O$ j1 u0 P - {
6 {3 ?* s, I2 M) T- n! c9 Y - printf("Server Listen Failed!\n");2 E4 L* ~: N4 T2 \* a; x
- exit(1);" o) W) b; z1 \% c
- }% ~2 t& `" E6 a0 t# V/ e
" h) b6 S! Z, k# `. J) B- // 服务器端一直运行用以持续为客户端提供服务7 Q8 Y$ h% x) _: |2 y" ?
- while(1); K+ V& a) t# x0 F$ |% z
- {' X+ x; U8 j" B N0 J3 D, y
- // 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
( B2 C" V# E6 Y6 m3 a - // 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 z4 j& G, E# C; Q: n6 P0 v* V, o1 h3 g - struct sockaddr_in client_addr;
+ B1 W5 l9 Z& d- }$ }/ w4 [ - socklen_t length = sizeof(client_addr);3 F3 `3 D; E7 g
w2 v) i9 M9 x8 I0 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9 Z3 U8 H" ?. }) e* J3 M: z
- // 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
. n# Y+ u# I! [8 S- L( E/ w$ Y - // 用select()来实现超时检测
8 r+ l' _* h" r3 i, M- }0 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
) j9 F. Z8 R2 s2 h - // 这里的new_server_socket代表了这个通信通道
" U i8 O2 J N8 z$ j - int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);. ]) V6 t& \( F" B$ H7 \! D. Y
- if (new_server_socket < 0)
$ ^4 R; l2 ?8 p- u7 M* O - {# _( A3 E n" h6 f: h
- printf("Server Accept Failed!\n");
% q: g. u8 `' d4 a3 k& p - break;1 W8 A0 G1 s8 J
- }
/ p& v) R! ]8 ^; \' K: q - # w1 H- T# o; ?' g4 p/ u
- char buffer[BUFFER_SIZE];# {) ?7 H2 b' x- [; S
- bzero(buffer, sizeof(buffer));
( W% u1 h# N/ g" i- c3 ~6 F - length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);
3 a7 v$ J l! V! n# { - if (length < 0)0 q, W K0 `% m" L
- {
0 R9 c* H. j3 R' T2 R9 _3 C - printf("Server Recieve Data Failed!\n");
9 W9 y, J( Z' ]) o - break;0 s4 O8 b- {. w4 v
- }
1 t# ]4 p5 T/ _" ?' F1 O8 E
3 s. ?! _4 v: M* Z3 I6 D- char file_name[FILE_NAME_MAX_SIZE + 1];- a3 O% ?- q7 M# M* g1 D
- bzero(file_name, sizeof(file_name));
, V1 R# h- v0 ~+ u [ - strncpy(file_name, buffer, W& L4 w. U; t1 {$ Y% D/ F7 I
- strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));
& P/ Z3 ]" `+ i; X' `7 w+ k5 n1 @ - ) @: E6 J3 J' Q/ N! z3 }
- FILE *fp = fopen(file_name, "r");+ @3 }& A7 `' j+ d
- if (fp == NULL)
! |4 C. M6 A2 {2 J D" v - {
- \5 }! f# Y& J6 b+ [" v! w: [ - printf("File:\t%s Not Found!\n", file_name);
# N* C& m% v# a - }
, y& \! { |) b7 r2 w7 \2 G - else
& }( s( p" }; `( @ - {
" Z" Z2 C/ t; t& T" u$ s% n - bzero(buffer, BUFFER_SIZE);
8 o0 f# B! V# h/ h - int file_block_length = 0;4 z2 t: I/ |. g5 A% m4 K0 I
- while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)' r; v" @ [; X
- {
4 c9 z W) m' k/ x - printf("file_block_length = %d\n", file_block_length);' h/ v9 ]0 c, i
, q' e# U7 ]0 N+ W- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端
/ n0 I& R2 u" ? - if (send(new_server_socket, buffer, file_block_length, 0) < 0)) }2 \0 U# d- S" Z9 f1 @+ m
- {
( n8 |& ` d* a/ ]# v* V! J0 v - printf("Send File:\t%s Failed!\n", file_name);$ [0 Z9 h/ D, d; u8 x1 W! y. i% X
- break;
2 Z# v# ^: y" `( c - }
; [; J4 @; H/ F7 S
: c2 D* _6 O% b4 z- bzero(buffer, sizeof(buffer));
* X$ A6 @* t8 }$ R. \" c - }
9 y, s6 ~5 ?! B+ q - fclose(fp);
# q, s3 Y* `7 m+ c - printf("File:\t%s Transfer Finished!\n", file_name);8 A9 J) ~4 ~# q6 E+ b) o$ _5 }2 M+ Y
- }
$ x9 c; k2 {* g/ c - , g' O0 z+ }( x" g$ Z
- close(new_server_socket);
8 {( V# F- s+ ]( p* @ - }
) w8 g+ ]+ r* `: Y- _. d/ _
, t2 ?7 }! H1 v8 t9 W# x- close(server_socket);4 a Y/ f2 b. F
" t, V3 B/ l$ O( L X4 C- return 0;
. M; l# F5 A- d; g+ @ - }4 n. \' J2 m" s/ O# m
- ) [9 p* Q8 D* }1 M/ s" S" G, {& h
复制代码 7 o# V4 T4 @7 N z D8 L0 k: U& i: F
: D4 \9 x; \6 u6 x; Y3 ]
, `: |% _7 I8 O# e( m+ x1 b2 P( i0 Y9 ^
- R' ?& T0 S: J( i |
|