コード例 #1
0
ファイル: dhcp.c プロジェクト: noikiy/asuswrt-merlin
void dhcp_init(void)
{
#if defined(HAVE_BSD_NETWORK)
  int oneopt = 1;
#endif

  daemon->dhcpfd = make_fd(daemon->dhcp_server_port);
  if (daemon->enable_pxe)
    daemon->pxefd = make_fd(PXE_PORT);
  else
    daemon->pxefd = -1;

#if defined(HAVE_BSD_NETWORK)
  /* When we're not using capabilities, we need to do this here before
     we drop root. Also, set buffer size small, to avoid wasting
     kernel buffers */
  
  if (option_bool(OPT_NO_PING))
    daemon->dhcp_icmp_fd = -1;
  else if ((daemon->dhcp_icmp_fd = make_icmp_sock()) == -1 ||
	   setsockopt(daemon->dhcp_icmp_fd, SOL_SOCKET, SO_RCVBUF, &oneopt, sizeof(oneopt)) == -1 )
    die(_("cannot create ICMP raw socket: %s."), NULL, EC_BADNET);
  
  /* Make BPF raw send socket */
  init_bpf();
#endif  
}
コード例 #2
0
ファイル: dhcp.c プロジェクト: WiseMan787/ralink_sdk
void dhcp_init(void)
{
  int fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
  struct sockaddr_in saddr;
  int oneopt = 1;
  struct dhcp_config *configs, *cp;

  if (fd == -1)
    die (_("cannot create DHCP socket : %s"), NULL, EC_BADNET);
  
  if (!fix_fd(fd) || 
#if defined(HAVE_LINUX_NETWORK)
      setsockopt(fd, SOL_IP, IP_PKTINFO, &oneopt, sizeof(oneopt)) == -1 ||
#elif defined(IP_RECVIF)
      setsockopt(fd, IPPROTO_IP, IP_RECVIF, &oneopt, sizeof(oneopt)) == -1 ||
#endif
      setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &oneopt, sizeof(oneopt)) == -1)  
    die(_("failed to set options on DHCP socket: %s"), NULL, EC_BADNET);
  
  /* When bind-interfaces is set, there might be more than one dnmsasq
     instance binding port 67. That's OK if they serve different networks.
     Need to set REUSEADDR to make this posible, or REUSEPORT on *BSD.
     OpenBSD <= 4.0 screws up IP_RECVIF when SO_REUSEPORT is set, but
     OpenBSD <= 3.9 doesn't have IP_RECVIF anyway, so we just have to elide
     this for OpenBSD 4.0, if you want more than one instance on oBSD4.0, tough. */

#ifndef OpenBSD4_0
  if (daemon->options & OPT_NOWILD)
    {
#ifdef SO_REUSEPORT
      int rc = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &oneopt, sizeof(oneopt));
#else
      int rc = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &oneopt, sizeof(oneopt));
#endif
      if (rc == -1)
	die(_("failed to set SO_REUSE{ADDR|PORT} on DHCP socket: %s"), NULL, EC_BADNET);
    }
#endif
  
  memset(&saddr, 0, sizeof(saddr));
  saddr.sin_family = AF_INET;
  saddr.sin_port = htons(DHCP_SERVER_PORT);
  saddr.sin_addr.s_addr = INADDR_ANY;
#ifdef HAVE_SOCKADDR_SA_LEN
  saddr.sin_len = sizeof(struct sockaddr_in);
#endif

  if (bind(fd, (struct sockaddr *)&saddr, sizeof(struct sockaddr_in)))
    die(_("failed to bind DHCP server socket: %s"), NULL, EC_BADNET);

  daemon->dhcpfd = fd;

#ifndef HAVE_LINUX_NETWORK
  /* When we're not using capabilities, we need to do this here before
     we drop root. Also, set buffer size small, to avoid wasting
     kernel buffers */
  
  if (daemon->options & OPT_NO_PING)
    daemon->dhcp_icmp_fd = -1;
  else if ((daemon->dhcp_icmp_fd = make_icmp_sock()) == -1 ||
	   setsockopt(daemon->dhcp_icmp_fd, SOL_SOCKET, SO_RCVBUF, &oneopt, sizeof(oneopt)) == -1 )
    die(_("cannot create ICMP raw socket: %s."), NULL, EC_BADNET);
  
  /* Make BPF raw send socket */
  init_bpf();
#endif
  
  /* If the same IP appears in more than one host config, then DISCOVER
     for one of the hosts will get the address, but REQUEST will be NAKed,
     since the address is reserved by the other one -> protocol loop. 
     Also check that FQDNs match the domain we are using. */
  for (configs = daemon->dhcp_conf; configs; configs = configs->next)
    {
      char *domain;
      for (cp = configs->next; cp; cp = cp->next)
	if ((configs->flags & cp->flags & CONFIG_ADDR) && configs->addr.s_addr == cp->addr.s_addr)
	  die(_("duplicate IP address %s in dhcp-config directive."), inet_ntoa(cp->addr), EC_BADCONF);
      
      if ((configs->flags & CONFIG_NAME) && (domain = strip_hostname(configs->hostname)))
	die(_("illegal domain %s in dhcp-config directive."), domain, EC_BADCONF);
    }
  
  daemon->dhcp_packet.iov_len = sizeof(struct dhcp_packet); 
  daemon->dhcp_packet.iov_base = safe_malloc(daemon->dhcp_packet.iov_len);
}
コード例 #3
0
ファイル: dhcp.c プロジェクト: qtekfun/htcDesire820Kernel
void dhcp_init(void)
{
  int fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
  struct sockaddr_in saddr;
  int oneopt = 1;
#if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
  int mtu = IP_PMTUDISC_DONT;
#endif

  if (fd == -1)
    die (_("cannot create DHCP socket: %s"), NULL, EC_BADNET);
  
  if (!fix_fd(fd) ||
#if defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DONT)
      setsockopt(fd, SOL_IP, IP_MTU_DISCOVER, &mtu, sizeof(mtu)) == -1 ||
#endif
#if defined(HAVE_LINUX_NETWORK)
      setsockopt(fd, SOL_IP, IP_PKTINFO, &oneopt, sizeof(oneopt)) == -1 ||
#else
      setsockopt(fd, IPPROTO_IP, IP_RECVIF, &oneopt, sizeof(oneopt)) == -1 ||
#endif
      setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &oneopt, sizeof(oneopt)) == -1)  
    die(_("failed to set options on DHCP socket: %s"), NULL, EC_BADNET);
  
  if (daemon->options & OPT_NOWILD)
    {
#ifdef SO_REUSEPORT
      int rc = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &oneopt, sizeof(oneopt));
#else
      int rc = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &oneopt, sizeof(oneopt));
#endif
      if (rc == -1)
	die(_("failed to set SO_REUSE{ADDR|PORT} on DHCP socket: %s"), NULL, EC_BADNET);
    }
  
  memset(&saddr, 0, sizeof(saddr));
  saddr.sin_family = AF_INET;
  saddr.sin_port = htons(daemon->dhcp_server_port);
  saddr.sin_addr.s_addr = INADDR_ANY;
#ifdef HAVE_SOCKADDR_SA_LEN
  saddr.sin_len = sizeof(struct sockaddr_in);
#endif

  if (bind(fd, (struct sockaddr *)&saddr, sizeof(struct sockaddr_in)))
    die(_("failed to bind DHCP server socket: %s"), NULL, EC_BADNET);

  daemon->dhcpfd = fd;

#if defined(HAVE_BSD_NETWORK)
  
  if (daemon->options & OPT_NO_PING)
    daemon->dhcp_icmp_fd = -1;
  else if ((daemon->dhcp_icmp_fd = make_icmp_sock()) == -1 ||
	   setsockopt(daemon->dhcp_icmp_fd, SOL_SOCKET, SO_RCVBUF, &oneopt, sizeof(oneopt)) == -1 )
    die(_("cannot create ICMP raw socket: %s."), NULL, EC_BADNET);
  
  
  init_bpf();
#endif
  
  check_dhcp_hosts(1);
    
  daemon->dhcp_packet.iov_len = sizeof(struct dhcp_packet); 
  daemon->dhcp_packet.iov_base = safe_malloc(daemon->dhcp_packet.iov_len);
}