net/proto-ipv6.c

   1 #include <sys/types.h>
   2 #include <sys/socket.h>
   3 #include <sys/un.h>
   4 #include <netinet/in.h>
   5 #include <linux/if.h>
   6 #include <linux/if_arp.h>
   7 #include <linux/if_packet.h>
   8 #include <stdlib.h>
   9 #include "maps.h"       // page_rand
  10 #include "net.h"
  11 #include "random.h"
  12 #include "utils.h"      // ARRAY_SIZE
  13 #include "compat.h"
  14
  15 void ipv6_gen_sockaddr(struct sockaddr **addr, socklen_t *addrlen)
  16 {
  17         struct sockaddr_in6 *ipv6;
  18
  19         ipv6 = malloc(sizeof(struct sockaddr_in6));
  20         if (ipv6 == NULL)
  21                 return;
  22
  23         ipv6->sin6_family = PF_INET6;
  24         ipv6->sin6_addr.s6_addr32[0] = 0;
  25         ipv6->sin6_addr.s6_addr32[1] = 0;
  26         ipv6->sin6_addr.s6_addr32[2] = 0;
  27         ipv6->sin6_addr.s6_addr32[3] = htonl(1);
  28         ipv6->sin6_port = htons(rand() % 65535);
  29         *addr = (struct sockaddr *) ipv6;
  30         *addrlen = sizeof(struct sockaddr_in6);
  31 }
  32
  33 void inet6_rand_socket(struct socket_triplet *st)
  34 {
  35         switch (rand() % 3) {
  36         case 0: st->type = SOCK_STREAM;     // TCP
  37                 st->protocol = 0;
  38                 break;
  39
  40         case 1: st->type = SOCK_DGRAM;      // UDP
  41                 if (rand_bool())
  42                         st->protocol = 0;
  43                 else
  44                         st->protocol = IPPROTO_UDP;
  45                 break;
  46
  47         case 2: st->type = SOCK_RAW;
  48                 st->protocol = rand() % PROTO_MAX;
  49                 break;
  50
  51         default:break;
  52         }
  53 }
  54
  55 #define NR_SOL_INET6_OPTS ARRAY_SIZE(inet6_opts)
  56 static const unsigned int inet6_opts[] = {
  57         IPV6_ADDRFORM, IPV6_2292PKTINFO, IPV6_2292HOPOPTS, IPV6_2292DSTOPTS,
  58         IPV6_2292RTHDR, IPV6_2292PKTOPTIONS, IPV6_CHECKSUM, IPV6_2292HOPLIMIT,
  59         IPV6_NEXTHOP, IPV6_AUTHHDR, IPV6_FLOWINFO, IPV6_UNICAST_HOPS,
  60         IPV6_MULTICAST_IF, IPV6_MULTICAST_HOPS, IPV6_MULTICAST_LOOP, IPV6_ADD_MEMBERSHIP,
  61         IPV6_DROP_MEMBERSHIP, IPV6_ROUTER_ALERT, IPV6_MTU_DISCOVER, IPV6_MTU,
  62         IPV6_RECVERR, IPV6_V6ONLY, IPV6_JOIN_ANYCAST, IPV6_LEAVE_ANYCAST };
  63
  64 void inet6_setsockopt(struct sockopt *so)
  65 {
  66         unsigned char val;
  67
  68         so->level = SOL_IPV6;
  69
  70         val = rand() % NR_SOL_INET6_OPTS;
  71         so->optname = inet6_opts[val];
  72 }