3 3.1 LAN ISDN (IP) 2 TCP/UDP IP IP IP IP (Ethernet) Ethernet LAN TCP/UDP LAN Ethernet LAN 2: Ethernet ATM, FDDI, LAN IP IP IP 3 IP 2 IP IP IP IP IP 3

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1 IP 1 (IP) TCP/IP LAN IP C IP HUB 100Base-TX 100Mbps UTP Ethernet HUB : 6 1

2 3 3.1 LAN ISDN (IP) 2 TCP/UDP IP IP IP IP (Ethernet) Ethernet LAN TCP/UDP LAN Ethernet LAN 2: Ethernet ATM, FDDI, LAN IP IP IP 3 IP 2 IP IP IP IP IP 3: IP IP IP TCP ( Transmission Control Protocol) UDP(User Datagram Protocol) 6 2

3 IP IP IP WWW Telnet, FTP WWW (1) (2) (3) (4) (5) 3.2 TCP UDP TCP, WWW TCP UDP UDP TCP UDP 4: TCP UDP 3 4 WWW POP(Post Office Protocol) TCP UDP IP IP TCP 6 3

4 UDP IP IP IP TCP UDP UDP IP TCP UDP OS IP TCP UDP UNIX WWW UNIX Windows OS Visual C++ UNIX C UNIX C C TCP UDP C 4 C 2 (1) 6 4

5 TCP UDP Server Side Client Side Server Side Client Side socket socket socket socket bind bind bind bind listen accept connect send/recv connect send/recv send/recv send/recv close close close close 5: TCP/UDP D:Y 2Y [ ] [AM or PM] 9 26 D:Y 2Y 0926AM (2) Visual C++ Visual C++ Microsoft Visual C () [] [ ] Win32 Console Application D:Y 2Y 0926AM server1 OK OK [] [] C++ server1.c OK server1.c Microsoft Visual C++ 6.0client1 client1.c (3) Visual C++ OS [ ] / 6 5

6 wsock32.lib server1,client1 (4) 1 UDP server1.c, client1.c TCP server2.c client2.c 2 5 UDP UDP server1.c, client1.c, Visual C++ // / / /* */ [] (1) IP IP (2) server1.exe (3) clent1.exe server1.exe (4) IP 6 6

7 Example 1: server1.c #include <stdio.h> #include <winsock.h> //Windows char message[1024]; main() { int sock; struct sockaddr_in sinme; short port=10001; // 2 WindowsOS :socket DLL WSADATA wsadata; WSAStartup(MAKEWORD(1, 1), &wsadata); // sinme.sin_family = AF_INET; sinme.sin_port = htons(port); // sinme.sin_addr.s_addr = htonl(inaddr_any);// // UDP sock=socket(af_inet, SOCK_DGRAM, 0 ); // bind(sock, (struct sockaddr *)&sinme, sizeof(sinme)); printf("waiting for UDP Data from Client.\n"); // recv(sock, message, 1024,0); printf("received Message=%s\n",message); 6 7

8 Example 1: client1.c #include <stdio.h> #include <winsock.h>//windows char message[1024]; main() { int sock; struct sockaddr_in sinhim; short port=10001; char *IPaddress=" "; // 2 WindowsOS :socket DLL WSADATA wsadata; WSAStartup(MAKEWORD(1, 1), &wsadata); // sinhim.sin_family = AF_INET; sinhim.sin_port = htons(port);// sinhim.sin_addr.s_addr = inet_addr(ipaddress);// // UDP sock=socket(af_inet, SOCK_DGRAM, 0 ); //UDP connect(sock, (struct sockaddr*)&sinhim, sizeof(struct sockaddr_in) ); printf("input Message:"); gets(message); //message send(sock, message, strlen(message)+1,0); 6 8

9 6 TCP TCP server2.c, client2.c, UDP UDP server2.c, client2.c [] (1) IP IP (2) server1.exe (3) clent1.exe server1.exe (4) IP 6 9

10 Example 2: server2.c #include <stdio.h> #include <io.h> #include <winsock.h> //Windows char message[1024]; main() { int sock, sock2; struct sockaddr_in sinme; struct sockaddr_in from; int len=sizeof(from); int one=1; short port=10001; // 2 WindowsOS socket DLL WSADATA wsadata; WSAStartup(MAKEWORD(1, 1), &wsadata); // sinme.sin_family = AF_INET; sinme.sin_port = htons(port); // sinme.sin_addr.s_addr = htonl(inaddr_any);// // TCP sock=socket(af_inet, SOCK_STREAM, 0 ); // if(bind(sock, (struct sockaddr *)&sinme, sizeof(sinme)) <0) printf("can t bind.\n"); listen(sock,somaxconn); // printf("waiting for Connection Request.\n"); sock2=accept(sock, (struct sockaddr *)&from, &len); if(sock2 < 0 ){ printf("can t accepted.\n"); exit(0); else{ printf("connected from %s.\n",inet_ntoa(from.sin_addr)); // recv(sock2, message, 1024,0); printf("received Message=%s\n",message); close(sock);// 6 10

11 Example 2: client2.c #include <stdio.h> #include <io.h> #include <winsock.h>//windows char message[1024]; main() { int sock; struct sockaddr_in sinhim; short port=10001; char *IPaddress=" "; // 2 WindowsOS :socket DLL WSADATA wsadata; WSAStartup(MAKEWORD(1, 1), &wsadata); // sinhim.sin_family = AF_INET; sinhim.sin_port = htons(port);// sinhim.sin_addr.s_addr = inet_addr(ipaddress);// // TCP sock=socket(af_inet, SOCK_STREAM, 0 ); // if(connect(sock,(struct sockaddr *)&sinhim, sizeof(sinhim) ) < 0 ) printf("can t connect.\n"); else printf("connected.\n"); // printf("input Message:"); gets(message); //message send(sock, message, strlen(message)+1,0); close(sock);// 6 11

12 7 1 UDP TCP 1. server client UDP, TCP client MB 1024 send,recv TCP (1) 1024 memset(message, a, 1024); memset message 1024 () a (2) TCP recv() 1024 send server 1024 recv recv 1024 recv total=0; while(1){ rc=recv(sock2, message, 1024,0 ); if(rc > 0) total=total+rc; if(total == 1024 * ) break; (3) Windows GetTickCount() t=gettickcount(); int t [msec] 6 12

13 1. UDP (TCP ) UDP LAN IP UDP UDP server1.c int one=1; server1.c bind setsockopt(sock, SOL_SOCKET, SO_BROADCAST, (char *)&one, sizeof(one)); client1.c

14 8 2 UDP, TCP G or C or P 3. (TCP ) listen listen(sock,0); while(1){ printf("waiting for Connection Request.\n"); sock2=accept(sock, (struct sockaddr *)&from, &len); close(sock2); 9 IP TCP UDP 6 14

15 C char c; c= A ; 5 (1 1 ). char message[5]; 5 [0] [1] [2] [3] [4] 1 message[0] message char *message; * Y0 ( :0), c i s t Y0 a b c Y0 any.... char *message="my Name is CIST."; char message[]="my Name is CIST."; 6 15

16 gets/puts 1 / gets( char *string ) / puts( const char *string) gets: string 1 /puts: char message[10]; gets(message); message 10 fgets() strlen strlen( char *string ) string sizeof length=strlen(message); message c i s t Y0 length a b Y0 any any 2 sizeof( type ) ( ) char message[10]; sizeof(int) //= 4 [byte] sizeof(message) //=10 [byte] sizeof(double) //=8 [byte] 1 4, 10, 8 int double CPU OS 6 16

17 strcpy strcpy( char *dest, const char *src ) src dest char message1[20]; char message2[20]; strcpy(message1, "System Jikken");// -->ex1 strcpy(message2, message1); // -->ex2 strcat ex1 message1 S y s t e m J i k k e n Y0... ex2 message2 strcat( char *dest, const char *src ) src dest char message1[20]; char message2[20]; char message3[]="cist"; strcpy(message1, "System"); strcat(message1, " Jikken"); strcat(message1, message3); message3 S y s t e m J i k k e n C I S T Y0... strcmp int strcmp( char *string1, char *string2 ) string1 string2 =0 char message1[]="cist"; char message2[]="abcd; char message3[]="cist"; if(strcmp(message1,message2) == 0 ) printf("same String\n"); // ex1 if(strcmp(message1,"cist") == 0 ) printf("same String\n"); // ex2 if(strcmp(message1,message3) == 0 ) printf("same String\n"); // ex3 1 ex1 printf ex2 ex3 6 17

18 memcpy memcpy( void *dest, void *src, size ) src size dest memcpy(message2, message1, sizeof(message1) ); message1 message2 memset memset( void *dest, int c, size ) src size c atoi memset(message, A, sizeof(message) ); message A 2 memset(message, 0, sizeof(message) ); message Y0 atoi( char *dest ) 1234 int a,b; char string[]="10001"; a=atoi("123"); // a=123 b=atoi(string); // b=10001 sprintf sprintf( char *dest, ) printf sprintf int a=5; double f=0.1; char string[100]; char mes[]="message"; sprintf(string, "My Name is CIST."); sprintf(string, "Answer: a=%d", a); sprintf(string, "Answer: f=%f", f); sprintf(string, "Message=%s", mes ); // %s printf 6 18

19 . socket socket( int type, int socket type int protocol ) type AF INET socket type UDP SOCK DGRAM, TCP SOCK STREAM. protocol 0 ID( descriptor) int sock; sock=socket(af_inet, SOCK_DGRAM, 0); // UDP sock=socket(af_inet, SOCK_STREAM, 0); // TCP bind bind( int sock, struct sockaddr *myaddr size ) myaddr struct sockaddr_in addr; short port=11111; addr.sin_family = AF_INET; addr.sin_port = htons(port); addr.sin_addr.s_addr = htonl(inaddr_any); sock=socket(af_inet, SOCK_STREAM, 0 ); if(bind(sock, (struct sockaddr *)&addr, sizeof(addr)) <0) printf("can t bind.\n"); listen listen( int sock, int backlog ) TCP backlog SOMAXCONN accept listen(sock, SOMAXCONN); 6 19

20 accept int accept(int sock, struct sockaddr *addr, socklen t *addrlen) TCP addr struct sockaddr_in from; int len=sizeof(from); sock2=accept(sock, (struct sockaddr *)&from, &len); recv/send accept sock2 connect connect(int sock, struct sockaddr *serv addr, socklen t addrlen) serv addr UDP send/recv serv addr : TCP struct sockaddr_in srv_addr; short port=10001; char *IPaddress=" "; srv_addr.sin_family = AF_INET; srv_addr.sin_port = htons(port);// srv_addr.sin_addr.s_addr = inet_addr(ipaddress);// IP sock=socket(af_inet, SOCK_STREAM, 0 ); if(connect(sock,(struct sockaddr *)&srv_addr, sizeof(srv_addr) ) < 0 ) printf("can t connect.\n"); else printf("connected.\n"); send/recv send(int sock, void *buf, size t size, int flags ) recv(int sock, void *buf, size t size, int flags ) TCP UDP send buf size recv: buf send recv char message[]="cist"; char buf[256]; send(sock, message, strlen(message), 0 ); recv(sock, buf, 256, 0); recv size size setsockopt getsockopt / 6 20

21 for for( 1; 2; 3) for(i=0; i< 10; i++){ ( 1) i=0 1 i++i++ i=i+1 i i for(;;){ ( 2) break (break ). 6 21

22 while while( 1) 1 1 () i=0; while( i< 10 ){ ( 1) i++; i=0 1 i i++ 2 i 10 for while(1){ ( 2) for(;;) break (break ). 6 22

23 do while do { 1 while( 1) () i=0; do{ ( 1) i++; while( i < 100 ); 1 i 100 do{ break break; do, for, while, switch while(1){ ( 1) if( value == 0) break; value 0 (if ), continue continue; do, for, while while(1){ 1 if( value == 0) continue; 2; value

24 if if( 1){ ( 1) else{ ( 2) if(i==1){ ( 1) else{ ( 2) i 1 1 (== ) 2 2 if(i==1){ ( 1) else 3 if( i>=0 && i<=5 ){ ( 1) && i =0 i =5 AND 4 if( i!=0 i!=5 ){ ( 1) i!=0 i!=5 OR!= 5 if( i<5 ){ ( 1) else if( i<10 ){ ( 2) else{ ( 3) else if i 5 1 else if i

25 switch, case switch( 1 ){ case 1: 1 (break;) case 2: 2 (break;) default: 3 1 default case case break switch 1 if switch switch( value ){ case 0: 1; break; case 1: 2; break; case 2: 3 break; default: 4; value switch 6 25

26 goto goto ; goto my_func(){ if(i == 1) goto label1; i=i+3; label1: i=j+2; if label1: switch continue, return{ goto goto 6 26

27 == = = = 1== 2 1 = 2 2 True, False if while if( i==1 ) i=i+1; if( j<=1 ) j=j+1; if( k>=1 ) k=k+1; if( m!=1 ) m=m+1; if( n <1 ) n=n+2; if( i=1 ) break; === i=1 i=1 break , --, i=0; j=0; i++; j--; val=++i; val=i++; ++(- -) val=++i; val i i=i+1 val=i++; i val i=i

28 && AND OR 1&& 2, 1 2 &&: 1 2 : 1 2 if( a==1 && b==1 && c==1) i=10; if( x==1 y==1 z==1 ) i=0; & AND OR ˆ OR 1& 2, 1 2 a1=0x00ff; a2=0xff00; a3= a1 & a2; // a3=0x0000 a4= a1 a2; // a4=0xffff 2 a1 a2 AND OR 2 a1=0x01; a2=0x10; a3= a1<<1; // a3=0x02 a4= a2>>1; // a4=0x08 2 a1 a2 6 28

29 rand() srand() rand(), srand( seed value ) seed value value=rand(); value rand() rand() srand() 2 srand( time(null) ); value=rand(); 6 29

30 printf() printf(...,...) printf: 1 printf("my Name is CIST.\n");... \ n 2 i=100; printf("answer= %d \n", i); %d i %d 3 value=0.1234; printf("answer= %f \n", value); %f value %f 4 i=10; value=0.1234; printf("answer= %d, Value = %f \n", i, value); Answer = 10, Value =

演算増幅器

演算増幅器ネットワークプログラミング ( 教科書 p.247-312) これまでに作成したプログラムは 1 台のコンピュータ上で動作するものだった本日はネットワーク上の別のコンピュータで実行しているプログラムと通信をしながら動作するプログラムの作成方法について学ぶネットワークプログラミングを高度に使いこなすためには関連する知識は幅広く求められる本日からの学習では単純なチャット ( 会話 ) を行うプログラムを題材として