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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 Q$ e( {; X, d. D+ h
- /*client.c*/" l' J7 q; k- F) w1 j0 w4 e
- #include<netinet/in.h> // for sockaddr_in 6 v j8 i, W: l
- #include<sys/types.h> // for socket 0 j7 Q6 W4 v8 v
- #include<sys/socket.h> // for socket & x8 e0 s1 s0 {5 P5 x# _
- #include<stdio.h> // for printf ) P# b5 B7 L, U/ n8 E
- #include<stdlib.h> // for exit 6 D3 i2 T J$ s& k7 ~0 [
- #include<string.h> // for bzero
9 j- y- l. A( L- L! ?; E$ O" f2 @
; U8 q5 D: E- a- #define HELLO_WORLD_SERVER_PORT 6666
8 U3 q. F9 @; j2 {# {9 l/ X6 \ - #define BUFFER_SIZE 1024
& `8 j: S) ]3 M% r/ y" L1 {+ s# D - #define FILE_NAME_MAX_SIZE 512 8 P" P+ ]( K& ^# n! e3 n& `+ I
- 9 Z/ G8 ?0 I& R" ~2 z; G7 x% O
- int main(int argc, char **argv) ( Y# y" B1 |! \( H( d
- {
$ m3 H# M2 F' L+ d' R1 q6 i7 x$ v( T - if (argc != 2)
) b7 F' U; E2 b6 Z, v. A5 T - {
0 F6 C& b$ b! x1 \; E - printf("Usage: ./%s ServerIPAddress\n", argv[0]);
; N, ?# |* O* x- r - exit(1); z" F6 ^' R* y9 `" z+ ~
- } 6 Z# C1 _2 m; K0 q8 m+ H
% Z- [9 L, ^6 p5 F- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口 " E- H( s* A9 K. i9 R
- struct sockaddr_in client_addr;
6 h! V% i _1 h5 V3 i0 w - bzero(&client_addr, sizeof(client_addr));
, W7 c3 F) E- X; I& A- x8 I - client_addr.sin_family = AF_INET; // internet协议族 * I" I$ t. e% w& U
- client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址
& P' z6 \3 ]* z5 x* }' m - client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口 * j4 A' [3 p8 Y6 d
- 3 ~$ a6 p* a$ Y9 X) [
- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket ( ~+ a+ @7 G; j, u6 m
- int client_socket = socket(AF_INET, SOCK_STREAM, 0); ' P( \6 [; f8 A( N) W: }
- if (client_socket < 0) 3 ^5 j# B7 u* j% U* _$ n6 W
- {
7 c2 }# r" I0 P- K' G K, ? - printf("Create Socket Failed!\n");
0 X% _7 |3 E N+ M* o+ o- G - exit(1);
. o- A0 ^( v/ S+ k \8 u. F" I - }
2 O$ M& e& {) ^" g1 K& N - 5 V5 [6 Y( T2 b$ t1 F% r
- // 把客户端的socket和客户端的socket地址结构绑定 . M8 {& R5 J# U9 T( f* q- E
- if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr)))
* Q+ R, ]7 Z# w8 U - {
& G# c) j/ `( R1 u( \7 M7 G( Y c - printf("Client Bind Port Failed!\n");
. i% x6 }, n; o4 } - exit(1);
; _- x' l# W6 N+ n# f2 ]( m; X - }
5 _- z6 ]! W7 w) n. c! i4 ~$ e - - Y* ~+ f0 S9 T5 }8 Q
- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口
% |3 o, V, i9 [) C& K. f - struct sockaddr_in server_addr;
$ A y7 k; ^0 y, O - bzero(&server_addr, sizeof(server_addr));
: V; O6 y7 @! P, B - server_addr.sin_family = AF_INET;
3 V& @3 \! k3 T
7 N I+ J" ]" |0 Z, C/ G- // 服务器的IP地址来自程序的参数
% ^& R; M9 n6 ^% G m, B - if (inet_aton(argv[1], &server_addr.sin_addr) == 0) : ~) g( v6 t3 T
- { ; ]; ^, g6 p) I) I4 n
- printf("Server IP Address Error!\n");
3 e* P6 `3 a0 m1 O - exit(1); % a3 X5 g0 @# y5 a$ v& j
- }
3 D7 ]4 N# `6 L" P$ w& w8 l4 E/ H - 2 ?% c" t& |; F8 n2 R. x- o# ]
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); 9 K% ~! E# {) h% j5 @+ _
- socklen_t server_addr_length = sizeof(server_addr);
! `3 K, i. v; ^& G5 l- D
* R( J8 ?" E* v' ~$ R- // 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 $ R6 ^( U( E \$ N0 c! i
- if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0)
& t7 u4 S& w( U! O E. k3 F. M - { - r. S5 D5 t6 ~# t) x8 ^( s
- printf("Can Not Connect To %s!\n", argv[1]);
& y1 d1 h" Y* A( C- C H - exit(1); " T8 Y+ _; l2 w- K2 E. S, u% g
- } 2 G0 j5 Z6 s6 N+ p, O
5 d2 Y ^0 [, e( {4 a- char file_name[FILE_NAME_MAX_SIZE + 1]; ! G6 _4 X2 i1 \: f* q u
- bzero(file_name, sizeof(file_name));
) c% p3 U: | z" K - printf("Please Input File Name On Server.\t");
m. c3 ^2 P" F6 R. ^ ?9 K7 U - scanf("%s", file_name);
! Y3 Z" T! m) k: P0 U - # N, D) P$ N. ~, Y/ k
- char buffer[BUFFER_SIZE]; : h' O0 c0 f6 e
- bzero(buffer, sizeof(buffer)); 1 V3 I! k, |8 h3 v: }& R6 v* C% i
- strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name));
8 f! @, P+ v1 ]/ 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 , Z7 C/ [' @* K0 Q6 u" O( p
- send(client_socket, buffer, BUFFER_SIZE, 0); # l& M: D4 q- V5 K. y4 p
- & a$ g6 Q% S5 Y1 O2 h9 G5 S
- FILE *fp = fopen(file_name, "w"); 5 T! R) D. o/ Y. u0 G; x% v
- if (fp == NULL)
& R! |* g, f' P E: v* i - {
& ?" I! P+ e) M+ O R+ n3 z - printf("File:\t%s Can Not Open To Write!\n", file_name);
1 z; R9 K5 r( j6 Q8 N* z1 J3 _ - exit(1); ! L3 J. o- \. Y; J! k
- }
, T" T. R0 s' r, k, a4 K) f6 Y - 6 L. P8 W; |& ?) D
- // 从服务器端接收数据到buffer中 + g* t8 H# N. T+ ~5 h
- bzero(buffer, sizeof(buffer)); ) ^1 Y1 m5 `& c
- int length = 0; ( y- a4 X: y4 U
- while(length = recv(client_socket, buffer, BUFFER_SIZE, 0))
3 U' [% c9 L* K* K- ` - { p2 F& |" Q2 S6 S6 K, w
- if (length < 0) . N, f0 |" y& V+ X ~ ^5 ~
- { 7 Z% G4 G+ Y/ P% u% x! j& _$ Y5 m
- printf("Recieve Data From Server %s Failed!\n", argv[1]);
. p: `$ m0 ?3 ^" h; P - break;
+ h! m0 k$ L( |7 [. D - } " f/ |1 P' [2 o: | h! }% |0 i
# H$ s0 y' j6 q- D" {3 v9 D5 t* \- int write_length = fwrite(buffer, sizeof(char), length, fp);
) K$ G1 j# Z+ e T - if (write_length < length) ! R0 r3 s9 r: A0 v2 Y8 Y
- {
- ` Q- q- E* v - printf("File:\t%s Write Failed!\n", file_name); , K4 G6 D4 ], ?: C8 L
- break;
: w; M% a( Y7 t) o8 S5 |% ~! h - } , i# D) i5 y, \" x7 R! l8 |
- bzero(buffer, BUFFER_SIZE); : z# B9 K& W+ {: I
- } 5 E' g: K' E# f
- + T0 D! o! Y0 n* f+ @9 ?
- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]);
, D! G6 D' f3 [6 l7 p3 j
! O; T' x O5 l" @2 G ^- // 传输完毕,关闭socket , N+ u% ~ I4 f% a$ v# l3 c z
- fclose(fp); ! k! U% N1 y# p4 K0 U& F9 E/ ^
- close(client_socket);
7 m) [, O: ^" G2 R2 F$ L, ` - return 0;
3 p T H3 O2 Y; }3 r0 s - ! E2 h+ k" F, g `3 s+ Y! T
- } , h' G; ]# O2 m- t$ Q9 V6 o! w3 S- Q
- : n) s1 Z: o+ k& Y7 h
复制代码- /*server.c*/
- f' ?5 z) V5 p" f - #include<netinet/in.h>
F5 [* E6 }1 i% G1 Q) Z8 c9 x - #include<sys/types.h>
8 J) M* X, G6 S( K3 S" R3 N3 }! W - #include<sys/socket.h>+ g: r: a1 `7 A0 e9 c& g! H O3 u
- #include<stdio.h>2 n. h+ B( `' J! _4 K+ _) _
- #include<stdlib.h>
3 r0 p! a" W1 u# D& A5 { - #include<string.h>& _, I% A9 A2 [! r ]; \
- , _* U _, }5 m1 }$ W$ h9 F
- #define HELLO_WORLD_SERVER_PORT 6666 //端口号7 a- `& q0 [; p9 R) N
- #define LENGTH_OF_LISTEN_QUEUE 20; i6 l0 P7 m: J# P4 N
- #define BUFFER_SIZE 1024
- m# O7 s, ~: p' m4 R - #define FILE_NAME_MAX_SIZE 512( F6 w4 a& s) l1 L: N
- 0 ]# h/ f4 K: j' x7 c ~$ k
- int main(int argc, char **argv)% p0 D" c& ?$ E% e3 ^
- {
8 d, v1 j. q2 h& R" m# K; } F - // set socket's address information' R- i3 P" Y/ R
- // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口
: V* i9 Z6 d- f: H2 |, C/ T4 g - struct sockaddr_in server_addr;8 k$ u" Y, ^- q" V' O, M8 Z5 w
- bzero(&server_addr, sizeof(server_addr));( ^' m' t% l* v# p! y9 j Z( ?! q( I# _
- server_addr.sin_family = AF_INET;0 q, `% F. `! p _" \
- server_addr.sin_addr.s_addr = htons(INADDR_ANY); {( ~3 j5 _1 Y% @5 a& c, ]. Z- g
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);1 R5 Y' G7 z8 d p" b3 F, Y
- / d; h: C( p% P2 C# c- s
- // create a stream socket) q; c$ ^0 o4 S9 A9 f
- // 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
+ l& Y* T6 K O, W2 j* q% m - int server_socket = socket(PF_INET, SOCK_STREAM, 0);
; B9 i( K3 Y4 T( p9 a8 e - if (server_socket < 0)9 \; f1 y: I$ Y) `' J8 f
- {/ r1 i( Z7 M# o( [0 ]( }8 E0 o
- printf("Create Socket Failed!\n");
/ p$ L* x0 X/ s3 z C; a - exit(1);2 l ~: j& x/ }2 u" e3 |
- }
: Y/ S' Y# ] h1 O, u7 Z+ O& x0 o/ F' s - : A, R& f- U: \) ^
- // 把socket和socket地址结构绑定$ h& }6 F: u, K' S- v
- if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))& K3 K. P. A( @) q4 C* f2 f
- {
( s: h3 k7 P, f4 p( m/ v8 b3 T, B - printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT); L% x) q/ @# _
- exit(1);9 L. E: C6 ^' Q7 ]/ v, u
- }0 e" N3 ?( g) I. {1 n
' ^4 l- H& `, j- // server_socket用于监听. K! K1 K, t6 D8 p! b
- if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))
) m# V7 C/ `2 y0 J - {1 X) V+ L# U- S; D* J0 Z
- printf("Server Listen Failed!\n");# |9 G; o: p! p$ z1 ^2 s: g& U
- exit(1);
9 R# j5 V; O* c' A- r* F - }
, _; B7 w+ w) |. T" r/ D, k* ?3 X
8 z6 r: @% J; [; C0 [- // 服务器端一直运行用以持续为客户端提供服务
; [+ Q- g, J! G6 r# l - while(1)1 [5 b7 S. m6 r h' d d6 P
- {# {6 z) M& Z$ I( E 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! k; H0 E2 M* x' H8 T
- // 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# ]( V, T# ` {+ h - struct sockaddr_in client_addr;8 e. t+ n# C" n4 p: _* k7 P4 C
- socklen_t length = sizeof(client_addr);
x' {+ m6 v; g2 J% W - - j, b9 ?8 w" B/ u" H
- // 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& p; E* J' e0 {! i3 C, z+ N
- // 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
+ s8 L. F2 q" I; F - // 用select()来实现超时检测5 w9 ^2 O3 \7 e
- // 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
8 C% s& Y. O, ~$ o3 s; }1 K3 @7 u8 A - // 这里的new_server_socket代表了这个通信通道$ K# Q+ C/ \7 m" a7 e
- int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);
: q) L; M( u# O7 d9 U' } - if (new_server_socket < 0)2 J* U( R: V0 J7 i9 N' X4 b
- {8 N& S) }. B0 p
- printf("Server Accept Failed!\n");
+ V2 o, U' Z# ^/ ? - break;! B# g( I- P5 @% |. V$ r
- }
' y- X% Y% c% L; S - ( O* a2 ?1 X$ k I+ s( t4 {
- char buffer[BUFFER_SIZE];1 |( P! S6 p- i8 w. i- c
- bzero(buffer, sizeof(buffer));
& N& [) h- ^6 [8 ~2 [( C - length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);
' B5 X- x2 c$ M. Y& `' b. v - if (length < 0)
9 ]1 ^7 h0 ~' t$ O - {. {4 I! T* r7 X+ a
- printf("Server Recieve Data Failed!\n");2 ^2 u$ s! O7 u5 _& ]: [$ @
- break;
! g: s1 F2 P0 N9 w4 `) O2 t - }. }; t: R; L- Z5 m/ [
& P7 z1 Y) P6 b/ d- char file_name[FILE_NAME_MAX_SIZE + 1];
* b+ K$ S& ^6 D* H' g - bzero(file_name, sizeof(file_name));
1 M2 `3 D" ?! {4 J - strncpy(file_name, buffer,
& T" P; }; l$ l1 Z* i$ h8 v; m - strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));
) v, K( g9 R3 j8 A2 u7 [$ |, A - 3 N4 C$ b6 O- b$ b8 a f- m
- FILE *fp = fopen(file_name, "r");
% A* o$ l, L; j - if (fp == NULL), K3 Q, C% _+ Z1 N% k( l
- {4 j" t4 T7 c3 I4 h3 B1 _$ ?
- printf("File:\t%s Not Found!\n", file_name);
- j- S; K# t1 W8 j* X. F! j - }; O8 C: a& V: Y6 \5 Q/ Q: W8 ?
- else
2 a1 U! U/ s& D( M - {& _/ b2 f$ y; H' ?; n8 h0 ^
- bzero(buffer, BUFFER_SIZE);8 Z7 D& b& Z, G) T9 B: i- g
- int file_block_length = 0;- s# V: B0 u8 }. B4 L& X
- while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)
& B' B4 g& _8 }0 y6 y - {1 t. W5 H' V. `8 s3 S! t8 }
- printf("file_block_length = %d\n", file_block_length);
, \4 _/ y: _5 z: Z; ` - % x9 s& l. |' l+ U* ^3 q9 ^5 K& V
- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端& A9 \3 L' N. B* C
- if (send(new_server_socket, buffer, file_block_length, 0) < 0)3 b- E/ v0 R; f: [* H% n& H* I5 H" T
- {6 |9 r4 W: s b$ c! {3 [, V% F
- printf("Send File:\t%s Failed!\n", file_name);
7 z* }! c$ n2 K, k - break;
5 G2 V; v/ M1 c. v+ k% I: U - }, @/ l0 Q0 r6 X; l8 h- ^" \, D
- # r3 [ T- w! v% O6 l, F! W
- bzero(buffer, sizeof(buffer));" e$ b" T8 E' ^. G+ S
- }# _/ m& M0 A8 m5 t8 P0 U
- fclose(fp);
$ H; u$ `0 @, F! u3 {* E1 }* _ - printf("File:\t%s Transfer Finished!\n", file_name);" A* R6 N3 ]2 E9 n' f
- }: _ K* r- o% `7 A- m2 Q
- - A. S5 o# ^5 `8 y- v5 l
- close(new_server_socket);5 [% _! {8 J/ R2 s( R
- }5 M C" d, z( g7 z1 s! W5 ^' y8 }: _4 s
- - z, Z. k5 I* [# O' T
- close(server_socket);
) x7 j6 J6 a* w, J: z- f* u
8 g5 ]- P+ ^' \6 w& f: [0 }- return 0;8 z9 ]1 `+ F) j J
- }2 I# B0 L+ I- I7 E: T f) w
- 4 C$ i W2 M3 H5 w% Q
复制代码
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