1 | /* io.c */ |
---|
2 | #include <sys/types.h> |
---|
3 | #include <sys/socket.h> |
---|
4 | #include <arpa/inet.h> |
---|
5 | #include <netdb.h> |
---|
6 | |
---|
7 | #include "SolarSim.h" |
---|
8 | |
---|
9 | void |
---|
10 | read_initial( AState state, const char *filename ) { |
---|
11 | int i; |
---|
12 | double rx, ry, rz, vx, vy, vz, mass; |
---|
13 | |
---|
14 | FILE *f = fopen(filename, "rt"); |
---|
15 | if( !f ) { |
---|
16 | state->particles = 0; |
---|
17 | return; |
---|
18 | } |
---|
19 | |
---|
20 | fscanf( f, "%d\n", &state->particles ); |
---|
21 | state->masses = malloc( state->particles * sizeof(real) ); |
---|
22 | state->positions = malloc( state->particles * sizeof(vector) ); |
---|
23 | state->velocities = malloc( state->particles * sizeof(vector) ); |
---|
24 | state->accelerations = malloc( state->particles * sizeof(vector) ); |
---|
25 | |
---|
26 | for( i = 0; i < state->particles; i++ ) { |
---|
27 | fscanf( f, "%lf %lf %lf %lf %lf %lf %lf\n", &rx, &ry, &rz, &vx, &vy, &vz, &mass ); |
---|
28 | state->masses[i] = mass; |
---|
29 | v_init(&state->positions[i],(real)rx,(real)ry,(real)rz); |
---|
30 | v_init(&state->velocities[i],(real)vx,(real)vy,(real)vz); |
---|
31 | } |
---|
32 | |
---|
33 | fclose(f); |
---|
34 | } |
---|
35 | |
---|
36 | int |
---|
37 | connect_to_server( char *servername, int portno, int PROTOCOL ){ |
---|
38 | return connect_to_server_tcp(servername, portno); |
---|
39 | } |
---|
40 | |
---|
41 | int |
---|
42 | connect_to_server_tcp( char* servername, int portno ){ |
---|
43 | struct sockaddr_in serv_addr; |
---|
44 | struct hostent *server; |
---|
45 | int server_sockfd; |
---|
46 | |
---|
47 | server_sockfd = socket( AF_INET, SOCK_STREAM, 0 ); |
---|
48 | if ( server_sockfd < 0 ) { |
---|
49 | printf ( "ERROR opening socket" ); |
---|
50 | return -1; |
---|
51 | } |
---|
52 | |
---|
53 | server = gethostbyname( servername ); |
---|
54 | if (server == NULL) { |
---|
55 | fprintf( stderr, "ERROR, no such host\n" ); |
---|
56 | return -1; |
---|
57 | } |
---|
58 | |
---|
59 | memset( (char *) &serv_addr, 0, sizeof(serv_addr) ); |
---|
60 | serv_addr.sin_family = AF_INET; |
---|
61 | memcpy( (char *)&serv_addr.sin_addr.s_addr, (char *)server->h_addr, server->h_length ); |
---|
62 | serv_addr.sin_port = htons( portno ); |
---|
63 | |
---|
64 | if ( connect( server_sockfd, (struct sockaddr*) &serv_addr, sizeof( serv_addr ) ) < 0 ) { |
---|
65 | printf( "ERROR connecting" ); |
---|
66 | return -1; |
---|
67 | } |
---|
68 | |
---|
69 | return server_sockfd; |
---|
70 | } |
---|
71 | |
---|
72 | |
---|
73 | int |
---|
74 | connect_to_server_udp( char* servername, int portno ){ |
---|
75 | struct sockaddr_in serv_addr, cli_addr; |
---|
76 | struct hostent *server; |
---|
77 | int server_sockfd, n; |
---|
78 | |
---|
79 | server_sockfd = socket( AF_INET, SOCK_DGRAM, 0 ); |
---|
80 | if ( server_sockfd < 0 ) { |
---|
81 | printf ( "ERROR opening socket" ); |
---|
82 | return -1; |
---|
83 | } |
---|
84 | |
---|
85 | server = gethostbyname( servername ); |
---|
86 | if (server == NULL) { |
---|
87 | fprintf( stderr, "ERROR, no such host\n" ); |
---|
88 | return -1; |
---|
89 | } |
---|
90 | |
---|
91 | memset( (char *) &serv_addr, 0, sizeof(serv_addr) ); |
---|
92 | serv_addr.sin_family = AF_INET; |
---|
93 | memcpy( (char *)&serv_addr.sin_addr.s_addr, (char *)server->h_addr, server->h_length ); |
---|
94 | serv_addr.sin_port = htons( portno ); |
---|
95 | |
---|
96 | memset( (char *) &cli_addr, 0, sizeof(cli_addr) ); |
---|
97 | cli_addr.sin_family = AF_INET; |
---|
98 | cli_addr.sin_addr.s_addr = htonl(INADDR_ANY); |
---|
99 | cli_addr.sin_port = htons(0); |
---|
100 | |
---|
101 | n = bind(server_sockfd, (struct sockaddr *) &cli_addr, sizeof(cli_addr)); |
---|
102 | if( n < 0 ) { |
---|
103 | fprintf(stderr, "%d: cannot bind port\n", portno); |
---|
104 | return -1; |
---|
105 | } |
---|
106 | |
---|
107 | return server_sockfd; |
---|
108 | } |
---|
109 | |
---|
110 | void |
---|
111 | send_state( int sock, AState state ) { |
---|
112 | send( sock, &state->particles, sizeof(int), 0 ); |
---|
113 | send( sock, state->masses, state->particles*sizeof(real), 0 ); |
---|
114 | send( sock, state->positions, state->particles*sizeof(vector), 0 ); |
---|
115 | send( sock, state->velocities, state->particles*sizeof(vector), 0 ); |
---|
116 | } |
---|
117 | |
---|
118 | void |
---|
119 | write_state( int fd, AState state ) { |
---|
120 | write( fd, &state->particles, sizeof(int) ); |
---|
121 | write( fd, state->masses, state->particles*sizeof(real) ); |
---|
122 | write( fd, state->positions, state->particles*sizeof(vector) ); |
---|
123 | write( fd, state->velocities, state->particles*sizeof(vector) ); |
---|
124 | } |
---|