net/ax25.c

   1 #include <stdlib.h>
   2 #include <sys/types.h>
   3 #include <sys/socket.h>
   4 #include <sys/un.h>
   5 #include <netinet/in.h>
   6 #include <netax25/ax25.h>
   7 #include "maps.h"       // page_rand
   8 #include "net.h"
   9 #include "random.h"
  10 #include "utils.h"      // ARRAY_SIZE
  11 #include "compat.h"
  12
  13 void ax25_gen_sockaddr(struct sockaddr **addr, socklen_t *addrlen)
  14 {
  15         struct sockaddr_ax25 *ax25;
  16
  17         ax25 = malloc(sizeof(struct sockaddr_ax25));
  18         if (ax25 == NULL)
  19                 return;
  20
  21         ax25->sax25_family = PF_AX25;
  22         memcpy(ax25->sax25_call.ax25_call, page_rand, 7);
  23         ax25->sax25_ndigis = rand();
  24         *addr = (struct sockaddr *) ax25;
  25         *addrlen = sizeof(struct sockaddr_ax25);
  26 }
  27
  28 #define NR_AX25_PROTOS 13
  29 static int ax25_protocols[NR_AX25_PROTOS] = {
  30         0x01,   /* ROSE */
  31         0x06,   /* Compressed TCP/IP packet   *//* Van Jacobsen (RFC 1144)    */
  32         0x07,   /* Uncompressed TCP/IP packet *//* Van Jacobsen (RFC 1144)    */
  33         0x08,   /* Segmentation fragment      */
  34         0xc3,   /* TEXTNET datagram protocol  */
  35         0xc4,   /* Link Quality Protocol      */
  36         0xca,   /* Appletalk                  */
  37         0xcb,   /* Appletalk ARP              */
  38         0xcc,   /* ARPA Internet Protocol     */
  39         0xcd,   /* ARPA Address Resolution    */
  40         0xce,   /* FlexNet                    */
  41         0xcf,   /* NET/ROM                    */
  42         0xF0    /* No layer 3 protocol impl.  */
  43 };
  44
  45 void ax25_rand_socket(struct socket_triplet *st)
  46 {
  47         switch (rand() % 3) {
  48         case 0: st->type = SOCK_DGRAM;
  49                 st->protocol = 0;
  50                 break;
  51         case 1: st->type = SOCK_SEQPACKET;
  52                 st->protocol = ax25_protocols[rand() % NR_AX25_PROTOS];
  53                 break;
  54         case 2: st->type = SOCK_RAW;
  55                 break;
  56         default:break;
  57         }
  58 }
  59
  60 #define NR_SOL_AX25_OPTS ARRAY_SIZE(ax25_opts)
  61 static const unsigned int ax25_opts[] = {
  62         AX25_WINDOW, AX25_T1, AX25_N2, AX25_T3,
  63         AX25_T2, AX25_BACKOFF, AX25_EXTSEQ, AX25_PIDINCL,
  64         AX25_IDLE, AX25_PACLEN, AX25_IAMDIGI,
  65         SO_BINDTODEVICE };
  66
  67 void ax25_setsockopt(struct sockopt *so)
  68 {
  69         unsigned char val;
  70
  71         so->level = SOL_AX25;
  72
  73         val = rand() % NR_SOL_AX25_OPTS;
  74         so->optname = ax25_opts[val];
  75 }