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import of dnsmasq-2.39.tar.gz

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This commit is contained in:
Simon Kelley
2007-04-29 19:47:21 +01:00
parent 6b01084f8e
commit f2621c7ff0
36 changed files with 5573 additions and 3350 deletions
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189
src/rfc1035.c
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@@ -485,15 +485,16 @@ unsigned char *find_pseudoheader(HEADER *header, size_t plen, size_t *len, unsi
/* is addr in the non-globally-routed IP space? */
static int private_net(struct all_addr *addrp)
static int private_net(struct in_addr addr)
{
struct in_addr addr = *(struct in_addr *)addrp;
if (inet_netof(addr) == 0xA ||
(inet_netof(addr) >= 0xAC10 && inet_netof(addr) < 0xAC20) ||
(inet_netof(addr) >> 8) == 0xC0A8)
return 1;
else
return 0;
in_addr_t ip_addr = ntohl(addr.s_addr);
return
((ip_addr & 0xFF000000) == 0x7F000000) /* 127.0.0.0/8 (loopback) */ ||
((ip_addr & 0xFFFF0000) == 0xC0A80000) /* 192.168.0.0/16 (private) */ ||
((ip_addr & 0xFF000000) == 0x0A000000) /* 10.0.0.0/8 (private) */ ||
((ip_addr & 0xFFF00000) == 0xAC100000) /* 172.16.0.0/12 (private) */ ||
((ip_addr & 0xFFFF0000) == 0xA9FE0000) /* 169.254.0.0/16 (zeroconf) */ ;
}
static void dns_doctor(HEADER *header, struct doctor *doctor, struct in_addr *addr)
@@ -864,7 +865,9 @@ int check_for_local_domain(char *name, time_t now, struct daemon *daemon)
struct crec *crecp;
struct mx_srv_record *mx;
struct txt_record *txt;
struct interface_name *intr;
struct ptr_record *ptr;
if ((crecp = cache_find_by_name(NULL, name, now, F_IPV4 | F_IPV6)) &&
(crecp->flags & (F_HOSTS | F_DHCP)))
return 1;
@@ -876,7 +879,15 @@ int check_for_local_domain(char *name, time_t now, struct daemon *daemon)
for (txt = daemon->txt; txt; txt = txt->next)
if (hostname_isequal(name, txt->name))
return 1;
for (intr = daemon->int_names; intr; intr = intr->next)
if (hostname_isequal(name, intr->name))
return 1;
for (ptr = daemon->ptr; ptr; ptr = ptr->next)
if (hostname_isequal(name, ptr->name))
return 1;
return 0;
}
@@ -1108,21 +1119,27 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen, struct daemon *d
/* see if it's w.z.y.z.in-addr.arpa format */
int is_arpa = in_arpa_name_2_addr(name, &addr);
struct ptr_record *ptr;
struct interface_name* intr = NULL;
for (ptr = daemon->ptr; ptr; ptr = ptr->next)
if (hostname_isequal(name, ptr->name))
break;
if (!ptr &&
!(crecp = cache_find_by_addr(NULL, &addr, now, is_arpa)))
{
if (is_arpa == F_IPV4 && (daemon->options & OPT_BOGUSPRIV) && private_net(&addr))
if (is_arpa == F_IPV4)
for (intr = daemon->int_names; intr; intr = intr->next)
if (addr.addr.addr4.s_addr == get_ifaddr(daemon, intr->intr).s_addr)
break;
if (intr)
{
ans = 1;
if (!dryrun)
{
/* if not in cache, enabled and private IPV4 address, return NXDOMAIN */
ans = 1;
nxdomain = 1;
if (!dryrun)
log_query(F_CONFIG | F_REVERSE | F_IPV4 | F_NEG | F_NXDOMAIN, name, &addr, 0, NULL, 0);
log_query(F_IPV4 | F_REVERSE | F_CONFIG, intr->name, &addr, 0, NULL, 0);
if (add_resource_record(header, limit, &trunc, nameoffset, &ansp,
daemon->local_ttl, NULL,
T_PTR, C_IN, "d", intr->name))
anscount++;
}
}
else if (ptr)
@@ -1132,59 +1149,71 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen, struct daemon *d
{
log_query(F_CNAME | F_FORWARD | F_CONFIG | F_BIGNAME, name, NULL, 0, NULL, 0);
for (ptr = daemon->ptr; ptr; ptr = ptr->next)
if (hostname_isequal(name, ptr->name))
{
if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, daemon->local_ttl, NULL,
T_PTR, C_IN, "d", ptr->ptr))
anscount++;
}
if (hostname_isequal(name, ptr->name) &&
add_resource_record(header, limit, &trunc, nameoffset, &ansp,
daemon->local_ttl, NULL,
T_PTR, C_IN, "d", ptr->ptr))
anscount++;
}
}
else do
{
/* don't answer wildcard queries with data not from /etc/hosts or dhcp leases */
if (qtype == T_ANY && !(crecp->flags & (F_HOSTS | F_DHCP)))
continue;
if (crecp->flags & F_NEG)
{
ans = 1;
auth = 0;
if (crecp->flags & F_NXDOMAIN)
nxdomain = 1;
if (!dryrun)
log_query(crecp->flags & ~F_FORWARD, name, &addr, 0, NULL, 0);
}
else if ((crecp->flags & (F_HOSTS | F_DHCP)) || !sec_reqd)
{
ans = 1;
if (!(crecp->flags & (F_HOSTS | F_DHCP)))
else if ((crecp = cache_find_by_addr(NULL, &addr, now, is_arpa)))
do
{
/* don't answer wildcard queries with data not from /etc/hosts or dhcp leases */
if (qtype == T_ANY && !(crecp->flags & (F_HOSTS | F_DHCP)))
continue;
if (crecp->flags & F_NEG)
{
ans = 1;
auth = 0;
if (!dryrun)
{
unsigned long ttl;
/* Return 0 ttl for DHCP entries, which might change
before the lease expires. */
if (crecp->flags & (F_IMMORTAL | F_DHCP))
ttl = daemon->local_ttl;
else
ttl = crecp->ttd - now;
log_query(crecp->flags & ~F_FORWARD, cache_get_name(crecp), &addr,
0, daemon->addn_hosts, crecp->uid);
if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, ttl, NULL,
T_PTR, C_IN, "d", cache_get_name(crecp)))
anscount++;
}
}
} while ((crecp = cache_find_by_addr(crecp, &addr, now, is_arpa)));
if (crecp->flags & F_NXDOMAIN)
nxdomain = 1;
if (!dryrun)
log_query(crecp->flags & ~F_FORWARD, name, &addr, 0, NULL, 0);
}
else if ((crecp->flags & (F_HOSTS | F_DHCP)) || !sec_reqd)
{
ans = 1;
if (!(crecp->flags & (F_HOSTS | F_DHCP)))
auth = 0;
if (!dryrun)
{
unsigned long ttl;
/* Return 0 ttl for DHCP entries, which might change
before the lease expires. */
if (crecp->flags & (F_IMMORTAL | F_DHCP))
ttl = daemon->local_ttl;
else
ttl = crecp->ttd - now;
log_query(crecp->flags & ~F_FORWARD, cache_get_name(crecp), &addr,
0, daemon->addn_hosts, crecp->uid);
if (add_resource_record(header, limit, &trunc, nameoffset, &ansp, ttl, NULL,
T_PTR, C_IN, "d", cache_get_name(crecp)))
anscount++;
}
}
} while ((crecp = cache_find_by_addr(crecp, &addr, now, is_arpa)));
else if (is_arpa == F_IPV4 &&
(daemon->options & OPT_BOGUSPRIV) &&
private_net(addr.addr.addr4))
{
/* if not in cache, enabled and private IPV4 address, return NXDOMAIN */
ans = 1;
nxdomain = 1;
if (!dryrun)
log_query(F_CONFIG | F_REVERSE | F_IPV4 | F_NEG | F_NXDOMAIN,
name, &addr, 0, NULL, 0);
}
}
for (flag = F_IPV4; flag; flag = (flag == F_IPV4) ? F_IPV6 : 0)
{
unsigned short type = T_A;
if (flag == F_IPV6)
#ifdef HAVE_IPV6
type = T_AAAA;
@@ -1195,7 +1224,7 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen, struct daemon *d
if (qtype != type && qtype != T_ANY)
continue;
/* Check for "A for A" queries. */
/* Check for "A for A" queries */
if (qtype == T_A && (addr.addr.addr4.s_addr = inet_addr(name)) != (in_addr_t) -1)
{
ans = 1;
@@ -1209,6 +1238,34 @@ size_t answer_request(HEADER *header, char *limit, size_t qlen, struct daemon *d
continue;
}
/* interface name stuff */
if (qtype == T_A)
{
struct interface_name *intr;
for (intr = daemon->int_names; intr; intr = intr->next)
if (hostname_isequal(name, intr->name))
break;
if (intr)
{
ans = 1;
if (!dryrun)
{
if ((addr.addr.addr4 = get_ifaddr(daemon, intr->intr)).s_addr == (in_addr_t) -1)
log_query(F_FORWARD | F_CONFIG | F_IPV4 | F_NEG, name, NULL, 0, NULL, 0);
else
{
log_query(F_FORWARD | F_CONFIG | F_IPV4, name, &addr, 0, NULL, 0);
if (add_resource_record(header, limit, &trunc, nameoffset, &ansp,
daemon->local_ttl, NULL, type, C_IN, "4", &addr))
anscount++;
}
}
continue;
}
}
cname_restart:
if ((crecp = cache_find_by_name(NULL, name, now, flag | F_CNAME)))
{