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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.
! {# p6 z" c, k" F0 v8 b9 G# j5 ?- /*client.c*/
3 J) N: d A4 u/ H6 i" D. W- h+ Z - #include<netinet/in.h> // for sockaddr_in
4 L% Y1 T. o2 j* R! W8 A. T - #include<sys/types.h> // for socket
2 c6 a7 Q3 n+ P - #include<sys/socket.h> // for socket
& i1 Y) k4 H0 d" d" c - #include<stdio.h> // for printf $ O! m# m. f7 i! T
- #include<stdlib.h> // for exit
4 [* i$ |, r p, m' L1 u5 ? - #include<string.h> // for bzero
) P: w3 ?2 Z4 Y - 5 ]5 N5 T4 I4 [8 @2 a# g A% @, d
- #define HELLO_WORLD_SERVER_PORT 6666
8 S7 E: P% g# u* i1 t. K - #define BUFFER_SIZE 1024
6 ?' B% i3 e. S) Q2 r - #define FILE_NAME_MAX_SIZE 512 4 f4 e, k4 f" X, L4 Y6 I
- $ i3 u& ?, d5 x4 c3 w) `% F
- int main(int argc, char **argv) 6 u$ Q* i8 a& [# |: h+ [
- {
% |% @' m+ }" D* o. T - if (argc != 2) ( \. r4 h" } A$ ]6 a1 A3 N' p
- { + {$ V7 N) |0 q; m* G. |2 @
- printf("Usage: ./%s ServerIPAddress\n", argv[0]); : j! {1 C4 \1 R) T/ P
- exit(1);
% O+ F7 g* J, F/ A - }
4 e" G4 c, v' ?: [8 ? - * ~7 ?6 G; H, o. G7 s; \1 _
- // 设置一个socket地址结构client_addr, 代表客户机的internet地址和端口
# b5 |* p$ I- n! @( _: [ - struct sockaddr_in client_addr; # T# C' J9 A. q& D& u$ L
- bzero(&client_addr, sizeof(client_addr));
% a5 T2 L: ? }! ?' H - client_addr.sin_family = AF_INET; // internet协议族 1 }" s$ t( H G
- client_addr.sin_addr.s_addr = htons(INADDR_ANY); // INADDR_ANY表示自动获取本机地址 + k+ z0 }8 y* y/ G, q5 D
- client_addr.sin_port = htons(0); // auto allocated, 让系统自动分配一个空闲端口
( p# l* L. |8 L# b. ?
1 f% T) C9 g4 Q% K8 Q- v% d- // 创建用于internet的流协议(TCP)类型socket,用client_socket代表客户端socket
$ j0 d) O" k- l' _% } - int client_socket = socket(AF_INET, SOCK_STREAM, 0);
4 q$ q. E$ e+ Z0 s9 w X - if (client_socket < 0)
3 @) g! R$ Z/ H* ^; w( t - {
- V) z. m' t2 _ - printf("Create Socket Failed!\n");
q$ {; u& D4 D - exit(1); ! e; B* j2 _* _2 p% }; i
- } $ y; [/ ?) l$ k& Y
- ( s" p3 H& }7 b& {3 N
- // 把客户端的socket和客户端的socket地址结构绑定
* ? X3 l- M1 r; c! V - if (bind(client_socket, (struct sockaddr*)&client_addr, sizeof(client_addr)))
. e. |; k% _$ K& P( W - {
) {9 a+ i( ?. s' ~$ O - printf("Client Bind Port Failed!\n"); 7 |- [8 Y9 ]: E8 u+ S1 c
- exit(1);
0 E: {. Z |* ^9 m. N$ d- Y! w& o; C - } 8 v8 r& ^; h. v. n: f0 `' C* B
% B7 h5 y2 Y, S; B- // 设置一个socket地址结构server_addr,代表服务器的internet地址和端口 $ y' M+ I) _0 p3 b, c, I6 Y5 M
- struct sockaddr_in server_addr;
' Y0 Z1 C! w. L2 F - bzero(&server_addr, sizeof(server_addr));
# t/ t, Z3 X# q6 Z* o - server_addr.sin_family = AF_INET;
3 h2 G/ [; Y2 k# w, ? - 9 N' x9 k3 D# R, M
- // 服务器的IP地址来自程序的参数 # }( B% B% u# H# O5 a8 H0 ~
- if (inet_aton(argv[1], &server_addr.sin_addr) == 0) $ p% s' C$ L3 z5 v4 m, f7 K
- {
8 }$ g1 x9 G/ p! X: [+ [' e - printf("Server IP Address Error!\n");
2 }; T* u% Y& N( \, i% s9 A' } - exit(1);
; W: w( [2 U! U! q4 K1 T - } % v }7 {* u7 |7 ?1 j8 f8 [" b- a/ T
- & f# r4 z8 `' L s2 k0 v5 }
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); 4 \- e. ~7 i* b4 ]; y! K9 e4 v
- socklen_t server_addr_length = sizeof(server_addr); 6 ?4 E) t6 s# m9 M& @$ ^3 y
- m9 G2 r" |; p0 Q& S
- // 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
1 g+ Q/ h7 d" M4 d - if (connect(client_socket, (struct sockaddr*)&server_addr, server_addr_length) < 0)
% ?0 a' w$ ^! }0 s+ ~ - { ) F. _/ N, H3 G. j5 }" W
- printf("Can Not Connect To %s!\n", argv[1]); 2 w- |) ]9 k9 {4 r. F4 Q
- exit(1);
+ k" d9 ]) a+ x7 {( D$ |5 p* X - }
; w/ G) `5 g& _; d$ K+ T - ( c5 W' b6 \( ^" n% v8 I
- char file_name[FILE_NAME_MAX_SIZE + 1];
* Y' a+ N& c0 n! v+ w - bzero(file_name, sizeof(file_name)); 2 T- e: G# R; {" e: e
- printf("Please Input File Name On Server.\t"); ) E4 c* p0 S& e4 q
- scanf("%s", file_name);
4 D& I& K5 z2 v$ K' Q - 8 _% j( q& d5 u& N( p2 o
- char buffer[BUFFER_SIZE];
1 P$ ]% ]5 F' P, \+ x0 f: g - bzero(buffer, sizeof(buffer)); & U. |2 s- J' g* R0 g
- strncpy(buffer, file_name, strlen(file_name) > BUFFER_SIZE ? BUFFER_SIZE : strlen(file_name)); $ r7 _5 H! u0 H9 F
- // 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 , g6 q2 r( l5 h+ E2 |1 `& Z
- send(client_socket, buffer, BUFFER_SIZE, 0);
$ j. t7 y% v$ T9 Q; ?! _9 L: A
+ {( A( w: k1 Q. J2 o, R3 r0 `% t- FILE *fp = fopen(file_name, "w"); ! b' e9 D& { L8 }/ W- E
- if (fp == NULL)
! D, ]. Z1 w/ P0 k, F1 t - {
; k( |$ s: r; E; x0 }1 i' X - printf("File:\t%s Can Not Open To Write!\n", file_name);
( p; j; _5 Q5 y - exit(1); ' x1 G* D9 ~" A5 S
- }
3 J6 `4 ?1 X" J/ S% S3 ]
! K1 d7 J2 ~6 w0 W7 h! K- // 从服务器端接收数据到buffer中
! g6 e+ Q! B# d - bzero(buffer, sizeof(buffer)); ' t% Q2 t2 j. _% e
- int length = 0;
! W; D0 I0 Z1 f3 @5 S* _ - while(length = recv(client_socket, buffer, BUFFER_SIZE, 0))
3 G& v- I1 `5 i- E# x - {
- f* }7 o( @% _( O. f' O - if (length < 0)
5 J5 }* y* m7 z/ D - {
8 D" b% b1 d/ [! X! H7 d& W - printf("Recieve Data From Server %s Failed!\n", argv[1]); ; {0 V& w5 L% {6 Z
- break;
( |2 N0 }# }2 |! f8 V V - } + W. O7 J8 l |, ^% b& u- X5 D
+ }# R$ q8 W* E/ l; j t% h1 ?; @$ l! @/ w- int write_length = fwrite(buffer, sizeof(char), length, fp);
' _4 C; T! _7 F+ n+ d1 S) Y - if (write_length < length)
! L! h. e8 @8 C; \5 {- q" q. A! t+ f - {
( g4 F2 r y! q7 P - printf("File:\t%s Write Failed!\n", file_name); & n; ?+ P$ T( n* H, i- M
- break;
. b! y6 ~6 z' f7 ]2 S4 j) }1 f% F - } # ^5 W# E* D0 P: Q+ y
- bzero(buffer, BUFFER_SIZE);
% q0 s& x; y3 H' F4 K d! O - } 8 v1 m$ \1 ?1 h4 {0 ^" }
5 S2 G% ]' m0 x. G: o( S- printf("Recieve File:\t %s From Server[%s] Finished!\n", file_name, argv[1]);
1 Y' y5 z, S1 u0 l; F+ I
+ j: Y) c b( f) N) j% z- // 传输完毕,关闭socket
9 j/ D* p' v+ M5 G0 S - fclose(fp);
( C5 f, L4 H& t! X - close(client_socket);
% C0 [) V5 Q8 { N' q* a0 n - return 0; 4 u1 S1 O5 `$ `& J8 ]3 V; B0 [
- / w' ?: w$ n/ x, @3 j; E0 y( Y# @
- }
/ a% a8 r$ d2 I
, p; B4 W. v* K6 T" A4 o
复制代码- /*server.c*/8 h) z8 {# G# I- r |+ C, }
- #include<netinet/in.h>
^: ~& K# F2 c/ ~* @ - #include<sys/types.h>
8 \# y( f5 i2 `/ L5 O% K% c - #include<sys/socket.h>! Y( w* u! M9 @9 V5 {
- #include<stdio.h>! {" w! I# q& l3 D" {# ~8 f
- #include<stdlib.h>" p- m1 \1 O' `% F1 c
- #include<string.h>% m. A4 _- W1 P2 @. {( u
- 7 z$ B2 b9 q9 x. ~" ~
- #define HELLO_WORLD_SERVER_PORT 6666 //端口号
0 _5 a0 Z' D! M6 Y2 b/ [ f - #define LENGTH_OF_LISTEN_QUEUE 20( @, z: }: n8 b& V. @( Q# n5 m5 E
- #define BUFFER_SIZE 1024
% ]8 f% H( y# m" y3 m5 v7 z+ J - #define FILE_NAME_MAX_SIZE 512" z6 b& h; W2 U I# U# _' i
- 7 c* R2 R& L5 U4 N* ^+ ~; f/ q
- int main(int argc, char **argv)6 `5 R% a1 G! ?' b: v7 J: _, K) O
- {/ q) r# a; y; ? L
- // set socket's address information: T# |* l- e1 q5 X- p
- // 设置一个socket地址结构server_addr,代表服务器internet的地址和端口4 U2 s/ U! F8 w2 t5 C
- struct sockaddr_in server_addr;5 X) }$ M4 Q d+ k9 T v6 Z" o6 ~
- bzero(&server_addr, sizeof(server_addr));
: i% Q! `; p* V+ r0 a# G7 C - server_addr.sin_family = AF_INET;
- d: L8 L/ n# z7 V1 s1 { \ - server_addr.sin_addr.s_addr = htons(INADDR_ANY);! Q# c5 v" ~" S
- server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);
7 O7 {- L6 z) u6 b6 o+ p
3 Z; |4 n J# X( s) H- // create a stream socket' b; j1 q }$ W. R$ Q, R6 m# Z
- // 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 |9 w; @' @5 ]* y
- int server_socket = socket(PF_INET, SOCK_STREAM, 0);
& D: R6 F. o1 P4 @6 ~' [ - if (server_socket < 0)* ~) s, T0 x' X: _1 Y3 i
- {* W" p8 \$ o5 m# O3 P$ Q: y
- printf("Create Socket Failed!\n");
) @+ h+ _3 g+ r, Y: y/ A4 W A1 I - exit(1);
% J; D5 V; c* k9 Y: }! }4 W - }
) h& `6 ]" Q4 M% m+ t: J5 \
+ l- ~- ]+ i0 T( }8 n3 {0 K- // 把socket和socket地址结构绑定
6 K& G F9 D; t3 {) v - if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)))
3 ?0 q+ B- c5 I" Y \3 v - { G/ T/ U- K1 d* w% N; e$ D( {
- printf("Server Bind Port: %d Failed!\n", HELLO_WORLD_SERVER_PORT);0 Y2 R# T' d; X' {8 F3 T0 P
- exit(1);
+ `: g2 n, |' t* Y - }
# \9 f& }/ d6 Y& Q - 7 ?; G5 Q, T( T# g
- // server_socket用于监听+ {: z0 }7 N" T2 W
- if (listen(server_socket, LENGTH_OF_LISTEN_QUEUE))& U/ T4 F8 h* ]0 E! f- v
- {, Z" x9 m4 m6 O& ?
- printf("Server Listen Failed!\n");9 z$ y" L1 w- I
- exit(1);, A I+ i& K" `' ~& `
- }
8 v9 h4 f- _8 M8 [ - , K- X$ X1 \ ~& y5 D) Z5 O' Y! J
- // 服务器端一直运行用以持续为客户端提供服务
3 q5 g/ \$ v3 h* `" k! @* M - while(1): q, g9 B# b G
- {
* i. ?8 p% _2 w - // 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accept5 |; `( Y }0 S0 N; y
- // 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) |1 R% z; P - struct sockaddr_in client_addr;
& v" U1 ]" w, k( ^# `9 U: j3 c - socklen_t length = sizeof(client_addr);
7 {3 T8 f: ~: F6 T) P+ G3 b - + l1 y! x$ k: E0 P
- // 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
: I$ K2 C5 z/ R4 g" g; w - // 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/ g5 x# o/ I" [7 {; Z
- // 用select()来实现超时检测8 B# e+ Q, T$ k; r' U! I
- // 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& C4 d( l/ n0 r A( }1 k6 W$ u
- // 这里的new_server_socket代表了这个通信通道2 W! c, O4 g+ A# O. _2 P; |
- int new_server_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);3 Z* S4 O% R! B6 r% U1 O3 s* i
- if (new_server_socket < 0)2 z& u' x0 H7 l. b9 r: N$ F
- {
' F6 f9 ^4 I8 K# |' T - printf("Server Accept Failed!\n");
. d; _7 a1 B+ @( G7 {$ k# \( t4 K2 I - break;) r+ A2 p# _8 o8 I8 U$ V
- }, u) m9 g) G, l$ O1 [
% X* `- h/ q' k- char buffer[BUFFER_SIZE];
2 t+ |$ E8 ~% k2 e+ F - bzero(buffer, sizeof(buffer));5 ]" j2 F/ z" x, p- J- ~5 {
- length = recv(new_server_socket, buffer, BUFFER_SIZE, 0);* Q# x( n! D$ v1 B; @) Y( L/ i
- if (length < 0)
8 p: X6 B: f4 g% r0 S8 L9 u - {: h. |$ ]3 t- I
- printf("Server Recieve Data Failed!\n");
$ p- A* f W* e- g - break;0 B4 E4 i4 ^5 e+ f d( h5 |7 U
- }9 `* O. N8 s! b/ M: x" _2 ]( k
! m8 Y/ ^( d; f+ P* e/ W8 B% k- char file_name[FILE_NAME_MAX_SIZE + 1];- l- ?& I8 ]( @$ k( A) h
- bzero(file_name, sizeof(file_name));
! z1 K1 @: d. I+ Z( c - strncpy(file_name, buffer,( z A: @: K+ I+ j1 _1 d2 g
- strlen(buffer) > FILE_NAME_MAX_SIZE ? FILE_NAME_MAX_SIZE : strlen(buffer));0 w' B3 j3 e: ^, H3 I$ G
- L# W* |3 A! v: p& e
- FILE *fp = fopen(file_name, "r");: m$ d4 O9 S; J& X V+ |
- if (fp == NULL)2 }: u- @1 }# C
- {
$ k7 Z& l& n1 R5 _ w0 u+ \ - printf("File:\t%s Not Found!\n", file_name);
W% U3 a& h+ G/ l2 P g# ? - }
0 p i K6 v0 r2 i - else' I% o" ^# _; E3 Z: M. T5 g
- {
+ @* B1 t! {- l/ |: p' W - bzero(buffer, BUFFER_SIZE);
# w: h0 P3 H9 N) V3 u - int file_block_length = 0;' j" z" h% d; A" u
- while( (file_block_length = fread(buffer, sizeof(char), BUFFER_SIZE, fp)) > 0)
s2 P9 y, _* Y7 P - {
& D8 b& o @; V# @ - printf("file_block_length = %d\n", file_block_length);
6 z- x" {* y# l, y - : _' }) U$ |1 _: W! G' P" ~) S
- // 发送buffer中的字符串到new_server_socket,实际上就是发送给客户端* M7 q' I0 p! e0 K6 ~; H7 Y+ y
- if (send(new_server_socket, buffer, file_block_length, 0) < 0)
& `% x1 [# C# R* V - {
. U3 _$ O4 |4 @! d% f - printf("Send File:\t%s Failed!\n", file_name);, Z2 ~- l' e' L
- break;/ x% v2 Q7 R7 E' {. D6 ?9 Q
- }
! D. v6 u2 G0 }8 F8 j1 ? - ! G! D9 x# v1 |# C
- bzero(buffer, sizeof(buffer));% B0 I) |$ ?0 ?1 g. J0 r4 Q7 ^% S
- }4 S- N9 R5 W3 s
- fclose(fp);8 N7 Y! n% I6 p) C' e7 z3 ?& G
- printf("File:\t%s Transfer Finished!\n", file_name);4 {- O9 @$ { j5 z. ~- w
- }. w) u! j; |4 R+ b) W; o7 l
, B1 o3 `4 {+ H2 {- close(new_server_socket);
, r4 g: o( t* P; G! K. W3 D& f6 a* H/ }' N - }
/ y" F1 E4 P) w8 f6 j
, F2 Q* m# Z9 U2 j/ [2 L- close(server_socket);$ D3 d J' W; f$ @
- q ` q) P4 j, ?/ Q- return 0;5 S, m! v' ?# Q5 b# y3 \8 w7 p9 W( w
- }3 j$ P( \1 ]" r ^
2 i$ j6 N' b, Z; w& L4 o" K
复制代码 / I8 C6 s f7 I l0 F0 K1 l, z+ I
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