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import of dnsmasq-2.18.tar.gz

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This commit is contained in:
Simon Kelley
2004-11-21 19:34:28 +00:00
parent 26128d2747
commit 59353a6b56
11 changed files with 225 additions and 141 deletions
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22
CHANGELOG
View File

@@ -1288,9 +1288,29 @@ version 2.17
clients. Credit to Cedric Duval for spotting this.
Fix rare crash associated with long DNS names and CNAME
records. Thanks to Holger_Hoffstatte and especially Steve
records. Thanks to Holger Hoffstatte and especially Steve
Grecni for help chasing that one down.
version 2.18
Reworked the Linux interface discovery code (again) to
cope with interfaces which have only IPv6 addresses and
interfaces with more than one IPv6 address. Thanks to
Martin Pels for help with that.
Fix problems which occured when more than one dhcp-range
was specified in the same subnet: sometimes parameters
(lease time, network-id tag) from the wrong one would be
used. Thanks to Rory Campbell-Lange for the bug report.
Reset cache statistics when clearing the cache.
Enable long command line options on FreeBSD when the
C library supports them.

2
dnsmasq-rh.spec
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@@ -5,7 +5,7 @@
###############################################################################
Name: dnsmasq
Version: 2.17
Version: 2.18
Release: 1
Copyright: GPL
Group: System Environment/Daemons

2
dnsmasq-suse.spec
View File

@@ -5,7 +5,7 @@
###############################################################################
Name: dnsmasq
Version: 2.17
Version: 2.18
Release: 1
Copyright: GPL
Group: Productivity/Networking/DNS/Servers

2
src/cache.c
View File

@@ -602,6 +602,8 @@ void cache_reload(int opts, char *buff, char *domain_suffix, struct hostsfile *a
struct crec *cache, **up, *tmp;
int i;
cache_inserted = cache_live_freed = 0;
for (i=0; i<hash_size; i++)
for (cache = hash_table[i], up = &hash_table[i]; cache; cache = tmp)
{

17
src/config.h
View File

@@ -1,4 +1,4 @@
/* dnsmasq is Copyright (c) 2000 Simon Kelley
/* dnsmasq is Copyright (c) 2000-2004 Simon Kelley
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -12,7 +12,7 @@
/* Author's email: simon@thekelleys.org.uk */
#define VERSION "2.17"
#define VERSION "2.18"
#define FTABSIZ 150 /* max number of outstanding requests */
#define MAX_PROCS 20 /* max no children for TCP requests */
@@ -180,7 +180,7 @@ NOTES:
HAVE_DEV_URANDOM - OpenBSD and FreeBSD and NetBSD
HAVE_DEV_RANDOM - FreeBSD and NetBSD
(OpenBSD with hardware random number generator)
HAVE_GETOPT_LONG - NetBSD
HAVE_GETOPT_LONG - NetBSD, later FreeBSD
(FreeBSD and OpenBSD only if you link GNU getopt)
*/
@@ -205,8 +205,10 @@ NOTES:
#define HAVE_DEV_RANDOM
#undef HAVE_SOCKADDR_SA_LEN
#undef HAVE_PSELECT
/* Don't fork into background on uClinux */
#if defined(__uClinux__)
/* Never use fork() on uClinux. Note that this is subtly different from the
--keep-in-foreground option, since it also suppresses forking new
processes for TCP connections. It's intended for use on MMU-less kernels. */
# define NO_FORK
#endif
@@ -254,7 +256,12 @@ typedef unsigned long in_addr_t;
#elif defined(__FreeBSD__) || defined(__OpenBSD__)
#undef HAVE_LINUX_IPV6_PROC
#undef HAVE_GETOPT_LONG
/* Later verions of FreeBSD have getopt_long() */
#if defined(optional_argument) && defined(required_argument)
# define HAVE_GETOPT_LONG
#else
# undef HAVE_GETOPT_LONG
#endif
#define HAVE_ARC4RANDOM
#define HAVE_RANDOM
#define HAVE_DEV_URANDOM

30
src/dhcp.c
View File

@@ -375,7 +375,7 @@ void dhcp_packet(struct daemon *daemon, time_t now)
}
}
int address_available(struct dhcp_context *context, struct in_addr taddr)
struct dhcp_context *address_available(struct dhcp_context *context, struct in_addr taddr)
{
/* Check is an address is OK for this network, check all
possible ranges. */
@@ -390,12 +390,34 @@ int address_available(struct dhcp_context *context, struct in_addr taddr)
if (!context->static_only &&
addr >= start &&
addr <= end)
return 1;
return context;
}
return 0;
return NULL;
}
struct dhcp_context *narrow_context(struct dhcp_context *context, struct in_addr taddr)
{
/* We start of with a set of possible contexts, all on the current subnet.
These are chained on ->current.
Here we have an address, and return the actual context correponding to that
address. Note that none may fit, if the address came a dhcp-host and is outside
any dhcp-range. In that case we return a static range is possible, or failing that,
any context on the subnet. (If there's more than one, this is a dodgy configuration:
maybe there should be a warning.) */
struct dhcp_context *tmp = address_available(context, taddr);
if (tmp)
return tmp;
for (tmp = context; tmp; tmp = tmp->current)
if (tmp->static_only)
return tmp;
return context;
}
struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr)
{
struct dhcp_config *config;

2
src/dnsmasq.c
View File

@@ -549,11 +549,13 @@ static void check_dns_listeners(struct daemon *daemon, fd_set *set, time_t now)
if (!match || (num_kids >= MAX_PROCS))
close(confd);
#ifndef NO_FORK
else if (!(daemon->options & OPT_DEBUG) && fork())
{
num_kids++;
close(confd);
}
#endif
else
{
char *buff;

9
src/dnsmasq.h
View File

@@ -29,6 +29,9 @@
#include <syslog.h>
#include <arpa/nameser.h>
/* and this. */
#include <getopt.h>
#include "config.h"
#include <arpa/inet.h>
@@ -50,9 +53,6 @@
#include <fcntl.h>
#include <ctype.h>
#include <signal.h>
#ifdef HAVE_GETOPT_LONG
# include <getopt.h>
#endif
#include <time.h>
#include <errno.h>
#include <pwd.h>
@@ -467,7 +467,8 @@ struct listener *create_bound_listeners(struct irec *interfaces, int port);
void dhcp_init(struct daemon *daemon);
void dhcp_packet(struct daemon *daemon, time_t now);
int address_available(struct dhcp_context *context, struct in_addr addr);
struct dhcp_context *address_available(struct dhcp_context *context, struct in_addr addr);
struct dhcp_context *narrow_context(struct dhcp_context *context, struct in_addr taddr);
int address_allocate(struct dhcp_context *context, struct daemon *daemon,
struct in_addr *addrp, unsigned char *hwaddr);
struct dhcp_config *find_config(struct dhcp_config *configs,

165
src/network.c
View File

@@ -14,11 +14,33 @@
#include "dnsmasq.h"
static struct irec *add_iface(struct daemon *daemon, struct irec *list, char *name, union mysockaddr *addr)
static struct irec *add_iface(struct daemon *daemon, struct irec *list,
char *name, int is_loopback, union mysockaddr *addr)
{
struct irec *iface;
struct iname *tmp;
/* If we are restricting the set of interfaces to use, make
sure that loopback interfaces are in that set. */
if (daemon->if_names && is_loopback)
{
struct iname *lo;
for (lo = daemon->if_names; lo; lo = lo->next)
if (lo->name && strcmp(lo->name, name) == 0)
{
lo->isloop = 1;
break;
}
if (!lo)
{
lo = safe_malloc(sizeof(struct iname));
lo->name = safe_string_alloc(name);
lo->isloop = lo->used = 1;
lo->next = daemon->if_names;
daemon->if_names = lo;
}
}
/* check blacklist */
if (daemon->if_except)
for (tmp = daemon->if_except; tmp; tmp = tmp->next)
@@ -67,6 +89,10 @@ static struct irec *add_iface(struct daemon *daemon, struct irec *list, char *na
struct irec *enumerate_interfaces(struct daemon *daemon)
{
#if defined(HAVE_LINUX_IPV6_PROC) && defined(HAVE_IPV6)
FILE *f;
#endif
union mysockaddr addr;
struct irec *iface = NULL;
char *buf, *ptr;
struct ifreq *ifr = NULL;
@@ -74,7 +100,7 @@ struct irec *enumerate_interfaces(struct daemon *daemon)
int lastlen = 0;
int len = 20 * sizeof(struct ifreq);
int fd = socket(PF_INET, SOCK_DGRAM, 0);
if (fd == -1)
die ("cannot create socket to enumerate interfaces: %s", NULL);
@@ -99,9 +125,8 @@ struct irec *enumerate_interfaces(struct daemon *daemon)
free(buf);
}
for (ptr = buf; ptr < buf + len; )
for (ptr = buf; ptr < buf + ifc.ifc_len; )
{
union mysockaddr addr;
#ifdef HAVE_SOCKADDR_SA_LEN
/* subsequent entries may not be aligned, so copy into
an aligned buffer to avoid nasty complaints about
@@ -141,76 +166,47 @@ struct irec *enumerate_interfaces(struct daemon *daemon)
if (ioctl(fd, SIOCGIFFLAGS, ifr) < 0)
die("ioctl error getting interface flags: %m", NULL);
/* If we are restricting the set of interfaces to use, make
sure that loopback interfaces are in that set. */
if (daemon->if_names && (ifr->ifr_flags & IFF_LOOPBACK))
{
struct iname *lo;
for (lo = daemon->if_names; lo; lo = lo->next)
if (lo->name && strcmp(lo->name, ifr->ifr_name) == 0)
{
lo->isloop = 1;
break;
}
if (!lo)
{
lo = safe_malloc(sizeof(struct iname));
lo->name = safe_string_alloc(ifr->ifr_name);
lo->isloop = lo->used = 1;
lo->next = daemon->if_names;
daemon->if_names = lo;
}
}
iface = add_iface(daemon, iface, ifr->ifr_name, &addr);
#if defined(HAVE_LINUX_IPV6_PROC) && defined(HAVE_IPV6)
/* IPv6 addresses don't seem to work with SIOCGIFCONF. Barf */
/* This code snarfed from net-tools 1.60 and certainly linux specific, though
it shouldn't break on other Unices, and their SIOGIFCONF might work. */
{
FILE *f = fopen(IP6INTERFACES, "r");
int found = 0;
union mysockaddr addr6;
if (f)
{
unsigned int plen, scope, flags, if_idx;
char devname[20], addrstring[32];
while (fscanf(f, "%32s %02x %02x %02x %02x %20s\n",
addrstring, &if_idx, &plen, &scope, &flags, devname) != EOF)
{
if (strcmp(devname, ifr->ifr_name) == 0)
{
int i;
unsigned char *addr6p = (unsigned char *) &addr6.in6.sin6_addr;
memset(&addr6, 0, sizeof(addr6));
addr6.sa.sa_family = AF_INET6;
for (i=0; i<16; i++)
{
unsigned int byte;
sscanf(addrstring+i+i, "%02x", &byte);
addr6p[i] = byte;
}
addr6.in6.sin6_port = htons(daemon->port);
addr6.in6.sin6_flowinfo = htonl(0);
addr6.in6.sin6_scope_id = htonl(scope);
found = 1;
break;
}
}
fclose(f);
}
if (found)
iface = add_iface(daemon, iface, ifr->ifr_name, &addr6);
}
#endif /* LINUX */
iface = add_iface(daemon, iface, ifr->ifr_name, ifr->ifr_flags & IFF_LOOPBACK, &addr);
}
#if defined(HAVE_LINUX_IPV6_PROC) && defined(HAVE_IPV6)
/* IPv6 addresses don't seem to work with SIOCGIFCONF. Barf */
/* This code snarfed from net-tools 1.60 and certainly linux specific, though
it shouldn't break on other Unices, and their SIOGIFCONF might work. */
if ((f = fopen(IP6INTERFACES, "r")))
{
unsigned int plen, scope, flags, if_idx;
char devname[20], addrstring[32];
while (fscanf(f, "%32s %02x %02x %02x %02x %20s\n",
addrstring, &if_idx, &plen, &scope, &flags, devname) != EOF)
{
int i;
struct ifreq sifr;
unsigned char *addr6p = (unsigned char *) &addr.in6.sin6_addr;
memset(&addr, 0, sizeof(addr));
addr.sa.sa_family = AF_INET6;
for (i=0; i<16; i++)
{
unsigned int byte;
sscanf(addrstring+i+i, "%02x", &byte);
addr6p[i] = byte;
}
addr.in6.sin6_port = htons(daemon->port);
addr.in6.sin6_flowinfo = htonl(0);
addr.in6.sin6_scope_id = htonl(scope);
strncpy(sifr.ifr_name, devname, IF_NAMESIZE);
if (ioctl(fd, SIOCGIFFLAGS, &sifr) < 0)
die("ioctl error getting interface flags: %m", NULL);
iface = add_iface(daemon, iface, sifr.ifr_name, sifr.ifr_flags & IFF_LOOPBACK, &addr);
}
fclose(f);
}
#endif /* LINUX */
if (buf)
free(buf);
#ifdef HAVE_SOCKADDR_SA_LEN
@@ -361,7 +357,6 @@ struct listener *create_bound_listeners(struct irec *interfaces, int port)
struct listener *new = safe_malloc(sizeof(struct listener));
new->family = iface->addr.sa.sa_family;
new->next = listeners;
listeners = new;
if ((new->tcpfd = socket(iface->addr.sa.sa_family, SOCK_STREAM, 0)) == -1 ||
(new->fd = socket(iface->addr.sa.sa_family, SOCK_DGRAM, 0)) == -1 ||
setsockopt(new->fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1 ||
@@ -383,9 +378,25 @@ struct listener *create_bound_listeners(struct irec *interfaces, int port)
#endif
if (bind(new->tcpfd, &iface->addr.sa, sa_len(&iface->addr)) == -1 ||
bind(new->fd, &iface->addr.sa, sa_len(&iface->addr)) == -1 ||
listen(new->tcpfd, 5) == -1)
die("failed to bind listening socket: %s", NULL);
bind(new->fd, &iface->addr.sa, sa_len(&iface->addr)) == -1)
{
#ifdef HAVE_IPV6
if (iface->addr.sa.sa_family == AF_INET6 && errno == ENODEV)
{
close(new->tcpfd);
close(new->fd);
free(new);
}
else
#endif
die("failed to bind listening socket: %s", NULL);
}
else
{
listeners = new;
if (listen(new->tcpfd, 5) == -1)
die("failed to listen on socket: %s", NULL);
}
}
return listeners;

16
src/option.c
View File

@@ -478,8 +478,10 @@ struct daemon *read_opts (int argc, char **argv)
}
case 'a':
{
do {
struct iname *new = safe_malloc(sizeof(struct iname));
if ((comma = strchr(optarg, ',')))
*comma++ = 0;
new->next = daemon->if_addrs;
#ifdef HAVE_IPV6
if (inet_pton(AF_INET, optarg, &new->addr.in.sin_addr))
@@ -510,14 +512,14 @@ struct daemon *read_opts (int argc, char **argv)
{
option = '?'; /* error */
free(new);
new = NULL;
break;
}
if (new)
daemon->if_addrs = new;
break;
}
daemon->if_addrs = new;
optarg = comma;
} while (optarg);
break;
case 'S':
case 'A':
{

99
src/rfc2131.c
View File

@@ -94,7 +94,7 @@ int dhcp_reply(struct daemon *daemon, struct in_addr iface_addr, char *iface_nam
char *hostname = NULL;
char *req_options = NULL;
char *message = NULL;
unsigned int renewal_time, expires_time, def_time;
unsigned int time;
struct dhcp_config *config;
struct dhcp_netid *netid = NULL;
struct in_addr addr, subnet_addr;
@@ -171,13 +171,6 @@ int dhcp_reply(struct daemon *daemon, struct in_addr iface_addr, char *iface_nam
{
context_tmp->current = context;
context = context_tmp;
/* start to build netid chain */
if (context_tmp->netid.net)
{
context_tmp->netid.next = netid;
netid = &context_tmp->netid;
}
}
if (!context)
@@ -205,6 +198,7 @@ int dhcp_reply(struct daemon *daemon, struct in_addr iface_addr, char *iface_nam
mess->yiaddr = config->addr;
if (lease_find_by_addr(config->addr))
message = "address in use";
context = narrow_context(context, config->addr);
}
else
message = "no address configured";
@@ -217,6 +211,12 @@ int dhcp_reply(struct daemon *daemon, struct in_addr iface_addr, char *iface_nam
if (have_config(config, CONFIG_NAME))
hostname = config->hostname;
if (context->netid.net)
{
context->netid.next = netid;
netid = &context->netid;
}
if (have_config(config, CONFIG_NETID))
{
config->netid.next = netid;
@@ -348,27 +348,6 @@ int dhcp_reply(struct daemon *daemon, struct in_addr iface_addr, char *iface_nam
/* do we have a lease in store? */
lease = lease_find_by_client(clid, clid_len);
def_time = have_config(config, CONFIG_TIME) ? config->lease_time : context->lease_time;
if ((opt = option_find(mess, sz, OPTION_LEASE_TIME)))
{
unsigned int req_time = option_uint(opt, 4);
if (def_time == 0xffffffff ||
(req_time != 0xffffffff && req_time < def_time))
expires_time = renewal_time = req_time;
else
expires_time = renewal_time = def_time;
}
else
{
renewal_time = def_time;
if (lease)
expires_time = (unsigned int)difftime(lease->expires, now);
else
expires_time = def_time;
}
if ((opt = option_find(mess, sz, OPTION_REQUESTED_OPTIONS)))
{
int len = option_len(opt);
@@ -455,16 +434,33 @@ int dhcp_reply(struct daemon *daemon, struct in_addr iface_addr, char *iface_nam
if (message)
return 0;
context = narrow_context(context, mess->yiaddr);
if (context->netid.net)
{
context->netid.next = netid;
netid = &context->netid;
}
time = have_config(config, CONFIG_TIME) ? config->lease_time : context->lease_time;
if ((opt = option_find(mess, sz, OPTION_LEASE_TIME)))
{
unsigned int req_time = option_uint(opt, 4);
if (time == 0xffffffff || (req_time != 0xffffffff && req_time < time))
time = req_time;
}
else if (lease && lease->expires != 0)
time = (unsigned int)difftime(lease->expires, now);
mess->siaddr = iface_addr;
bootp_option_put(mess, daemon->boot_config, netid);
p = option_put(p, end, OPTION_MESSAGE_TYPE, 1, DHCPOFFER);
p = option_put(p, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, ntohl(iface_addr.s_addr));
p = option_put(p, end, OPTION_LEASE_TIME, 4, expires_time);
p = option_put(p, end, OPTION_LEASE_TIME, 4, time);
/* T1 and T2 are required in DHCPOFFER by HP's wacky Jetdirect client. */
if (expires_time != 0xffffffff)
if (time != 0xffffffff)
{
p = option_put(p, end, OPTION_T1, 4, (expires_time/2));
p = option_put(p, end, OPTION_T2, 4, ((expires_time * 7)/8));
p = option_put(p, end, OPTION_T1, 4, (time/2));
p = option_put(p, end, OPTION_T2, 4, (time*7)/8);
}
p = do_req_options(context, p, end, req_options, daemon,
NULL, iface_addr, netid, subnet_addr);
@@ -513,9 +509,6 @@ int dhcp_reply(struct daemon *daemon, struct in_addr iface_addr, char *iface_nam
/* desynchronise renewals */
fuzz = rand16();
while (fuzz > (renewal_time/16))
fuzz = fuzz/2;
mess->yiaddr = mess->ciaddr;
}
@@ -568,20 +561,37 @@ int dhcp_reply(struct daemon *daemon, struct in_addr iface_addr, char *iface_nam
{
log_packet("ACK", &mess->yiaddr, mess->chaddr, iface_name, hostname);
context = narrow_context(context, mess->yiaddr);
if (context->netid.net)
{
context->netid.next = netid;
netid = &context->netid;
}
time = have_config(config, CONFIG_TIME) ? config->lease_time : context->lease_time;
if ((opt = option_find(mess, sz, OPTION_LEASE_TIME)))
{
unsigned int req_time = option_uint(opt, 4);
if (time == 0xffffffff || (req_time != 0xffffffff && req_time < time))
time = req_time;
}
lease_set_hwaddr(lease, mess->chaddr);
if (hostname)
lease_set_hostname(lease, hostname, daemon->domain_suffix);
lease_set_expires(lease, renewal_time == 0xffffffff ? 0 : now + (time_t)renewal_time);
lease_set_expires(lease, time == 0xffffffff ? 0 : now + (time_t)time);
mess->siaddr = iface_addr;
bootp_option_put(mess, daemon->boot_config, netid);
p = option_put(p, end, OPTION_MESSAGE_TYPE, 1, DHCPACK);
p = option_put(p, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, ntohl(iface_addr.s_addr));
p = option_put(p, end, OPTION_LEASE_TIME, 4, renewal_time);
if (renewal_time != 0xffffffff)
p = option_put(p, end, OPTION_LEASE_TIME, 4, time);
if (time != 0xffffffff)
{
p = option_put(p, end, OPTION_T1, 4, (renewal_time/2) - fuzz);
p = option_put(p, end, OPTION_T2, 4, ((renewal_time * 7)/8) - fuzz);
while (fuzz > (time/16))
fuzz = fuzz/2;
p = option_put(p, end, OPTION_T1, 4, (time/2) - fuzz);
p = option_put(p, end, OPTION_T2, 4, ((time * 7)/8) - fuzz);
}
p = do_req_options(context, p, end, req_options, daemon,
hostname, iface_addr, netid, subnet_addr);
@@ -599,6 +609,13 @@ int dhcp_reply(struct daemon *daemon, struct in_addr iface_addr, char *iface_nam
if (message || mess->ciaddr.s_addr == 0)
return 0;
context = narrow_context(context, mess->ciaddr);
if (context->netid.net)
{
context->netid.next = netid;
netid = &context->netid;
}
mess->siaddr = iface_addr;
bootp_option_put(mess, daemon->boot_config, netid);
p = option_put(p, end, OPTION_MESSAGE_TYPE, 1, DHCPACK);