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import of dnsmasq-2.24.tar.gz

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This commit is contained in:
Simon Kelley
2005-11-26 21:46:27 +00:00
parent 3d8df260e1
commit b8187c80a8
35 changed files with 6104 additions and 364 deletions
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108
src/rfc2131.c
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@@ -78,7 +78,8 @@ static unsigned char *do_req_options(struct dhcp_context *context,
struct in_addr subnet_addr,
unsigned char fqdn_flags);
int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_name, unsigned int sz, time_t now)
int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_name,
unsigned int sz, time_t now, int unicast_dest)
{
unsigned char *opt, *clid = NULL;
struct dhcp_lease *ltmp, *lease = NULL;
@@ -89,6 +90,7 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
unsigned char *p = mess->options + sizeof(u32); /* skip cookie */
unsigned char *end = (unsigned char *)(daemon->dhcp_packet + 1);
char *hostname = NULL, *offer_hostname = NULL, *client_hostname = NULL;
int hostname_auth = 0;
unsigned char *req_options = NULL;
char *message = NULL;
unsigned int time;
@@ -166,7 +168,7 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
if (mess->htype != ARPHRD_ETHER && mess->htype != ARPHRD_IEEE802)
#endif
{
syslog(LOG_WARNING, "DHCP request for unsupported hardware type (%d) recieved on %s",
syslog(LOG_WARNING, _("DHCP request for unsupported hardware type (%d) recieved on %s"),
mess->htype, iface_name);
return 0;
}
@@ -215,8 +217,8 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
if (!context)
{
syslog(LOG_WARNING, "no address range available for DHCP request %s %s",
subnet_addr.s_addr ? "with subnet selector" : "via",
syslog(LOG_WARNING, _("no address range available for DHCP request %s %s"),
subnet_addr.s_addr ? _("with subnet selector") : _("via"),
subnet_addr.s_addr ? inet_ntoa(subnet_addr) : (mess->giaddr.s_addr ? inet_ntoa(mess->giaddr) : iface_name));
return 0;
}
@@ -233,7 +235,7 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
struct in_addr *logaddr = NULL;
if (have_config(config, CONFIG_DISABLE))
message = "disabled";
message = _("disabled");
end = mess->options + 64; /* BOOTP vend area is only 64 bytes */
@@ -257,7 +259,7 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
for (id_list = daemon->dhcp_ignore; id_list; id_list = id_list->next)
if (match_netid(id_list->list, netid))
message = "disabled";
message = _("disabled");
if (!message)
{
@@ -267,20 +269,20 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
mess->yiaddr = config->addr;
if ((lease = lease_find_by_addr(config->addr)) &&
memcmp(lease->hwaddr, chaddr, ETHER_ADDR_LEN) != 0)
message = "address in use";
message = _("address in use");
}
else if (!(daemon->options & OPT_BOOTP_DYNAMIC))
message = "no address configured";
message = _("no address configured");
else
{
if ((lease = lease_find_by_client(mess->chaddr, NULL, 0)))
mess->yiaddr = lease->addr;
else if (!address_allocate(context, daemon, &mess->yiaddr, chaddr, netid, now))
message = "no address available";
message = _("no address available");
}
if (!message && !lease && (!(lease = lease_allocate(chaddr, NULL, 0, mess->yiaddr))))
message = "no leases left";
message = _("no leases left");
if (!message)
{
@@ -295,7 +297,7 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
lease_set_hwaddr(lease, chaddr, NULL, 0);
if (hostname)
lease_set_hostname(lease, hostname, daemon->domain_suffix);
lease_set_hostname(lease, hostname, daemon->domain_suffix, 1);
lease_set_expires(lease, 0); /* infinite lease */
p = do_req_options(context, p, end, NULL, daemon,
@@ -370,6 +372,7 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
if (have_config(config, CONFIG_NAME))
{
hostname = config->hostname;
hostname_auth = 1;
/* be careful not to send an OFFER with a hostname not
matching the DISCOVER. */
if (fqdn_flags != 0 || !client_hostname || hostname_isequal(hostname, client_hostname))
@@ -475,7 +478,7 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
if (have_config(config, CONFIG_ADDR) &&
config->addr.s_addr == option_addr(opt).s_addr)
{
syslog(LOG_WARNING, "disabling DHCP static address %s", inet_ntoa(config->addr));
syslog(LOG_WARNING, _("disabling DHCP static address %s"), inet_ntoa(config->addr));
config->flags &= ~CONFIG_ADDR ;
}
else
@@ -493,7 +496,7 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
if (lease && lease->addr.s_addr == mess->ciaddr.s_addr)
lease_prune(lease, now);
else
message = "unknown lease";
message = _("unknown lease");
log_packet("RELEASE", &mess->ciaddr, chaddr, iface_name, message);
@@ -506,7 +509,7 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
if ((opt = option_find(mess, sz, OPTION_REQUESTED_IP, INADDRSZ)))
addr = option_addr(opt);
if (ignore || have_config(config, CONFIG_DISABLE))
message = "ignored";
message = _("ignored");
else if (have_config(config, CONFIG_ADDR) &&
(!(ltmp = lease_find_by_addr(config->addr)) || ltmp == lease))
mess->yiaddr = config->addr;
@@ -516,7 +519,7 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
!config_find_by_address(daemon->dhcp_conf, addr))
mess->yiaddr = addr;
else if (!address_allocate(context, daemon, &mess->yiaddr, chaddr, netid, now))
message = "no address available";
message = _("no address available");
log_packet("DISCOVER", opt ? &addr : NULL, chaddr, iface_name, message);
}
@@ -586,7 +589,7 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
return 0;
if (lease && lease->addr.s_addr != mess->yiaddr.s_addr)
message = "wrong address";
message = _("wrong address");
}
}
else
@@ -594,8 +597,11 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
/* RENEWING or REBINDING */
/* Must exist a lease for this address */
if (!lease || mess->ciaddr.s_addr != lease->addr.s_addr)
message = "lease not found";
{
message = _("lease not found");
/* ensure we broadcast NAK */
unicast_dest = 0;
}
/* desynchronise renewals */
fuzz = rand16();
mess->yiaddr = mess->ciaddr;
@@ -609,12 +615,16 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
/* If a machine moves networks whilst it has a lease, we catch that here. */
if (!is_same_net(mess->yiaddr, context->start, context->netmask))
message = "wrong network";
{
message = _("wrong network");
/* ensure we broadcast NAK */
unicast_dest = 0;
}
/* Check for renewal of a lease which is outside the allowed range. */
else if (!address_available(context, mess->yiaddr) &&
(!have_config(config, CONFIG_ADDR) || config->addr.s_addr != mess->yiaddr.s_addr))
message = "address not available";
message = _("address not available");
/* Check if a new static address has been configured. Be very sure that
when the client does DISCOVER, it will get the static address, otherwise
@@ -623,35 +633,45 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
else if (have_config(config, CONFIG_ADDR) &&
config->addr.s_addr != mess->yiaddr.s_addr &&
(!(ltmp = lease_find_by_addr(config->addr)) || ltmp == lease))
message = "static lease available";
message = _("static lease available");
/* Check to see if the address is reserved as a static address for another host */
else if ((addr_config = config_find_by_address(daemon->dhcp_conf, mess->yiaddr)) && addr_config != config)
message = "address reserved";
message = _("address reserved");
else if ((ltmp = lease_find_by_addr(mess->yiaddr)) && ltmp != lease)
message = "address in use";
message = _("address in use");
else if (!lease && !(lease = lease_allocate(chaddr, clid, clid_len, mess->yiaddr)))
message = "no leases left";
message = _("no leases left");
}
if (message)
{
log_packet("NAK", &mess->yiaddr, chaddr, iface_name, message);
mess->siaddr.s_addr = mess->yiaddr.s_addr = mess->ciaddr.s_addr = 0;
mess->siaddr.s_addr = mess->yiaddr.s_addr = 0;
bootp_option_put(mess, NULL, NULL);
p = option_put(p, end, OPTION_MESSAGE_TYPE, 1, DHCPNAK);
p = option_put(p, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, ntohl(context->local.s_addr));
p = option_put_string(p, end, OPTION_MESSAGE, message);
mess->flags |= htons(0x8000); /* broadcast */
/* This fixes a problem with the DHCP spec, broadcasting a NAK to a host on
a distant subnet which unicast a REQ to us won't work. */
if (!unicast_dest || mess->giaddr.s_addr != 0 ||
mess->ciaddr.s_addr == 0 || is_same_net(context->local, mess->ciaddr, context->netmask))
{
mess->flags |= htons(0x8000); /* broadcast */
mess->ciaddr.s_addr = 0;
}
}
else
{
if (!hostname)
hostname = host_from_dns(daemon, mess->yiaddr);
if (!hostname_auth && (client_hostname = host_from_dns(daemon, mess->yiaddr)))
{
hostname = client_hostname;
hostname_auth = 1;
}
log_packet("ACK", &mess->yiaddr, chaddr, iface_name, hostname);
context = narrow_context(context, mess->yiaddr);
@@ -671,7 +691,7 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
lease_set_hwaddr(lease, chaddr, clid, clid_len);
if (hostname)
lease_set_hostname(lease, hostname, daemon->domain_suffix);
lease_set_hostname(lease, hostname, daemon->domain_suffix, hostname_auth);
lease_set_expires(lease, time == 0xffffffff ? 0 : now + (time_t)time);
mess->siaddr = context->local;
@@ -695,7 +715,7 @@ int dhcp_reply(struct daemon *daemon, struct dhcp_context *context, char *iface_
case DHCPINFORM:
if (ignore || have_config(config, CONFIG_DISABLE))
message = "ignored";
message = _("ignored");
log_packet("INFORM", &mess->ciaddr, chaddr, iface_name, message);
@@ -809,12 +829,24 @@ static void bootp_option_put(struct dhcp_packet *mess,
}
}
static int check_space(unsigned char *p, unsigned char *end, int len, int opt)
{
/* always keep one octet space for the END option. */
if (p + len + 3 >= end)
{
syslog(LOG_WARNING, _("cannot send DHCP option %d: no space left in packet"), opt);
return 0;
}
return 1;
}
static unsigned char *option_put(unsigned char *p, unsigned char *end, int opt, int len, unsigned int val)
{
int i;
/* always keep one octet space for the END option. */
if (p + len + 3 < end)
if (check_space(p, end, len, opt))
{
*(p++) = opt;
*(p++) = len;
@@ -838,7 +870,7 @@ static unsigned char *option_put_string(unsigned char *p, unsigned char *end, in
{
size_t len = strlen(string);
if (p + len + 3 < end)
if (check_space(p, end, len, opt))
{
*(p++) = opt;
*(p++) = len;
@@ -941,9 +973,9 @@ static struct dhcp_opt *option_find2(struct dhcp_netid *netid, struct dhcp_opt *
static unsigned char *do_opt(struct dhcp_opt *opt, unsigned char *p, unsigned char *end, struct in_addr local)
{
if (p + opt->len + 3 >= end)
if (!check_space(p, end, opt->len, opt->opt))
return p;
*(p++) = opt->opt;
*(p++) = opt->len;
@@ -1097,7 +1129,7 @@ static unsigned char *do_req_options(struct dhcp_context *context,
if (!opt->netid || match_netid(opt->netid, netid))
{
if (vendor_class && strcmp(vendor_class, (char *)opt->vendor_class) != 0)
syslog(LOG_WARNING, "More than one vendor class matches, using %s", vendor_class);
syslog(LOG_WARNING, _("More than one vendor class matches, using %s"), vendor_class);
else
vendor_class = (char *)opt->vendor_class;
}