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import of dnsmasq-2.20.tar.gz

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This commit is contained in:
Simon Kelley
2005-01-23 12:06:08 +00:00
parent bb01cb9604
commit f6b7dc47c7
19 changed files with 906 additions and 438 deletions
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52
src/dhcp.c
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@@ -34,6 +34,13 @@ void dhcp_init(struct daemon *daemon)
setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &oneopt, sizeof(oneopt)) == -1)
die("failed to set options on DHCP socket: %s", NULL);
/* 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. */
if ((daemon->options & OPT_NOWILD) &&
setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &oneopt, sizeof(oneopt)) == -1)
die("failed to set SO_REUSEADDR on DHCP socket: %s", NULL);
saddr.sin_family = AF_INET;
saddr.sin_port = htons(DHCP_SERVER_PORT);
saddr.sin_addr.s_addr = INADDR_ANY;
@@ -429,17 +436,52 @@ struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct i
return NULL;
}
/* Is every member of check matched by a member of pool? */
int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool)
{
struct dhcp_netid *tmp1;
if (!check)
return 0;
for (; check; check = check->next)
{
if (check->net[0] != '#')
{
for (tmp1 = pool; tmp1; tmp1 = tmp1->next)
if (strcmp(check->net, tmp1->net) == 0)
break;
if (!tmp1)
return 0;
}
else
for (tmp1 = pool; tmp1; tmp1 = tmp1->next)
if (strcmp((check->net)+1, tmp1->net) == 0)
return 0;
}
return 1;
}
int address_allocate(struct dhcp_context *context, struct daemon *daemon,
struct in_addr *addrp, unsigned char *hwaddr)
struct in_addr *addrp, unsigned char *hwaddr, struct dhcp_netid *netids)
{
/* Find a free address: exclude anything in use and anything allocated to
a particular hwaddr/clientid/hostname in our configuration */
a particular hwaddr/clientid/hostname in our configuration.
Try to return from contexts which mathc netis first. */
struct in_addr start, addr ;
unsigned int i, j;
for (; context; context = context->current)
if (!context->static_only)
if (context->static_only)
continue;
else if (netids && !context->filter_netid)
continue;
else if (!netids && context->filter_netid)
continue;
else if (netids && context->filter_netid && !match_netid(&context->netid, netids))
continue;
else
{
/* pick a seed based on hwaddr then iterate until we find a free address. */
for (j = context->addr_epoch, i = 0; i < ETHER_ADDR_LEN; i++)
@@ -471,6 +513,10 @@ int address_allocate(struct dhcp_context *context, struct daemon *daemon,
} while (addr.s_addr != start.s_addr);
}
if (netids)
return address_allocate(context, daemon, addrp, hwaddr, NULL);
return 0;
}