-/* dnsmasq is Copyright (c) 2000-2003 Simon Kelley
-
+/* dnsmasq is Copyright (c) 2000-2011 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
- the Free Software Foundation; version 2 dated June, 1991.
-
+ the Free Software Foundation; version 2 dated June, 1991, or
+ (at your option) version 3 dated 29 June, 2007.
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-/* Author's email: simon@thekelleys.org.uk */
-
+#define COPYRIGHT "Copyright (c) 2000-2011 Simon Kelley"
-#ifdef __linux__
-/* for pselect.... */
-#define _XOPEN_SOURCE 600
-/* but then DNS headers don't compile without.... */
-#define _BSD_SOURCE
+#ifndef NO_LARGEFILE
+/* Ensure we can use files >2GB (log files may grow this big) */
+# define _LARGEFILE_SOURCE 1
+# define _FILE_OFFSET_BITS 64
#endif
-
+
+/* Get linux C library versions and define _GNU_SOURCE for kFreeBSD. */
+#if defined(__linux__) || defined(__GLIBC__)
+# ifndef __ANDROID__
+# define _GNU_SOURCE
+# endif
+# include <features.h>
+#endif
+
+/* Need these defined early */
+#if defined(__sun) || defined(__sun__)
+# define _XPG4_2
+# define __EXTENSIONS__
+#endif
+
/* get these before config.h for IPv6 stuff... */
#include <sys/types.h>
+#include <sys/socket.h>
#include <netinet/in.h>
-/* get this before config.h too. */
-#include <syslog.h>
+/* and this. */
+#include <getopt.h>
#include "config.h"
-
-#include <arpa/nameser.h>
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+
+#include "dns_protocol.h"
+#include "dhcp_protocol.h"
+
+#define gettext_noop(S) (S)
+#ifndef LOCALEDIR
+# define _(S) (S)
+#else
+# include <libintl.h>
+# include <locale.h>
+# define _(S) gettext(S)
+#endif
+
#include <arpa/inet.h>
#include <sys/stat.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
#include <sys/ioctl.h>
-#include <sys/select.h>
-#if defined(__sun) || defined(__sun__)
+#if defined(HAVE_SOLARIS_NETWORK)
# include <sys/sockio.h>
#endif
+#include <sys/select.h>
+#include <sys/wait.h>
#include <sys/time.h>
+#include <sys/un.h>
+#include <limits.h>
#include <net/if.h>
+#if defined(HAVE_SOLARIS_NETWORK) && !defined(ifr_mtu)
+/* Some solaris net/if./h omit this. */
+# define ifr_mtu ifr_ifru.ifru_metric
+#endif
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <ctype.h>
#include <signal.h>
-#ifdef HAVE_GETOPT_LONG
-# include <getopt.h>
-#endif
+#include <stddef.h>
#include <time.h>
#include <errno.h>
#include <pwd.h>
#include <grp.h>
-#if defined(__OpenBSD__)
+#include <stdarg.h>
+#if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__sun__) || defined (__sun) || defined (__ANDROID__)
# include <netinet/if_ether.h>
#else
# include <net/ethernet.h>
#include <net/if_arp.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
-#ifdef HAVE_BPF
-# include <net/bpf.h>
+#include <netinet/ip_icmp.h>
+#include <sys/uio.h>
+#include <syslog.h>
+#include <dirent.h>
+#ifndef HAVE_LINUX_NETWORK
# include <net/if_dl.h>
-#else
-# include <netpacket/packet.h>
#endif
-#include <sys/uio.h>
-/* Size: we check after adding each record, so there must be
- memory for the largest packet, and the largest record */
+#if defined(HAVE_LINUX_NETWORK)
+#include <linux/capability.h>
+/* There doesn't seem to be a universally-available
+ userpace header for these. */
+extern int capset(cap_user_header_t header, cap_user_data_t data);
+extern int capget(cap_user_header_t header, cap_user_data_t data);
+#define LINUX_CAPABILITY_VERSION_1 0x19980330
+#define LINUX_CAPABILITY_VERSION_2 0x20071026
+#define LINUX_CAPABILITY_VERSION_3 0x20080522
+
+#include <sys/prctl.h>
+#elif defined(HAVE_SOLARIS_NETWORK)
+#include <priv.h>
+#endif
+
+/* daemon is function in the C library.... */
+#define daemon dnsmasq_daemon
+
+/* Async event queue */
+struct event_desc {
+ int event, data;
+};
+
+#define EVENT_RELOAD 1
+#define EVENT_DUMP 2
+#define EVENT_ALARM 3
+#define EVENT_TERM 4
+#define EVENT_CHILD 5
+#define EVENT_REOPEN 6
+#define EVENT_EXITED 7
+#define EVENT_KILLED 8
+#define EVENT_EXEC_ERR 9
+#define EVENT_PIPE_ERR 10
+#define EVENT_USER_ERR 11
+#define EVENT_CAP_ERR 12
+#define EVENT_PIDFILE 13
+#define EVENT_HUSER_ERR 14
+#define EVENT_GROUP_ERR 15
+#define EVENT_DIE 16
+#define EVENT_LOG_ERR 17
+#define EVENT_FORK_ERR 18
+
+/* Exit codes. */
+#define EC_GOOD 0
+#define EC_BADCONF 1
+#define EC_BADNET 2
+#define EC_FILE 3
+#define EC_NOMEM 4
+#define EC_MISC 5
+#define EC_INIT_OFFSET 10
+
+/* Min buffer size: we check after adding each record, so there must be
+ memory for the largest packet, and the largest record so the
+ min for DNS is PACKETSZ+MAXDNAME+RRFIXEDSZ which is < 1000.
+ This might be increased is EDNS packet size if greater than the minimum.
+*/
#define DNSMASQ_PACKETSZ PACKETSZ+MAXDNAME+RRFIXEDSZ
-#define OPT_BOGUSPRIV 1
-#define OPT_FILTER 2
-#define OPT_LOG 4
-#define OPT_SELFMX 8
-#define OPT_NO_HOSTS 16
-#define OPT_NO_POLL 32
-#define OPT_DEBUG 64
-#define OPT_ORDER 128
-#define OPT_NO_RESOLV 256
-#define OPT_EXPAND 512
-#define OPT_LOCALMX 1024
-#define OPT_NO_NEG 2048
-#define OPT_NODOTS_LOCAL 4096
-#define OPT_NOWILD 8192
-#define OPT_ETHERS 16384
+/* Trust the compiler dead-code eliminator.... */
+#define option_bool(x) (((x) < 32) ? daemon->options & (1u << (x)) : daemon->options2 & (1u << ((x) - 32)))
+
+#define OPT_BOGUSPRIV 0
+#define OPT_FILTER 1
+#define OPT_LOG 2
+#define OPT_SELFMX 3
+#define OPT_NO_HOSTS 4
+#define OPT_NO_POLL 5
+#define OPT_DEBUG 6
+#define OPT_ORDER 7
+#define OPT_NO_RESOLV 8
+#define OPT_EXPAND 9
+#define OPT_LOCALMX 10
+#define OPT_NO_NEG 11
+#define OPT_NODOTS_LOCAL 12
+#define OPT_NOWILD 13
+#define OPT_ETHERS 14
+#define OPT_RESOLV_DOMAIN 15
+#define OPT_NO_FORK 16
+#define OPT_AUTHORITATIVE 17
+#define OPT_LOCALISE 18
+#define OPT_DBUS 19
+#define OPT_DHCP_FQDN 20
+#define OPT_NO_PING 21
+#define OPT_LEASE_RO 22
+#define OPT_ALL_SERVERS 23
+#define OPT_RELOAD 24
+#define OPT_LOCAL_REBIND 25
+#define OPT_TFTP_SECURE 26
+#define OPT_TFTP_NOBLOCK 27
+#define OPT_LOG_OPTS 28
+#define OPT_TFTP_APREF 29
+#define OPT_NO_OVERRIDE 30
+#define OPT_NO_REBIND 31
+#define OPT_ADD_MAC 32
+#define OPT_DNSSEC 33
+#define OPT_LAST 34
+
+/* extra flags for my_syslog, we use a couple of facilities since they are known
+ not to occupy the same bits as priorities, no matter how syslog.h is set up. */
+#define MS_TFTP LOG_USER
+#define MS_DHCP LOG_DAEMON
struct all_addr {
union {
/* dns doctor param */
struct doctor {
- struct in_addr in, out, mask;
+ struct in_addr in, end, out, mask;
struct doctor *next;
};
+struct mx_srv_record {
+ char *name, *target;
+ int issrv, srvport, priority, weight;
+ unsigned int offset;
+ struct mx_srv_record *next;
+};
+
+struct naptr {
+ char *name, *replace, *regexp, *services, *flags;
+ unsigned int order, pref;
+ struct naptr *next;
+};
+
+struct txt_record {
+ char *name;
+ unsigned char *txt;
+ unsigned short class, len;
+ struct txt_record *next;
+};
+
+struct ptr_record {
+ char *name, *ptr;
+ struct ptr_record *next;
+};
+
+struct cname {
+ char *alias, *target;
+ struct cname *next;
+};
+
+struct interface_name {
+ char *name; /* domain name */
+ char *intr; /* interface name */
+ struct interface_name *next;
+};
+
union bigname {
char name[MAXDNAME];
union bigname *next; /* freelist */
struct crec {
struct crec *next, *prev, *hash_next;
time_t ttd; /* time to die */
- struct all_addr addr;
+ int uid;
+ union {
+ struct all_addr addr;
+ struct {
+ struct crec *cache;
+ int uid;
+ } cname;
+ } addr;
unsigned short flags;
union {
char sname[SMALLDNAME];
} name;
};
-#define F_IMMORTAL 1
-#define F_CONFIG 2
-#define F_REVERSE 4
-#define F_FORWARD 8
-#define F_DHCP 16
-#define F_NEG 32
-#define F_HOSTS 64
-#define F_IPV4 128
-#define F_IPV6 256
-#define F_BIGNAME 512
-#define F_UPSTREAM 1024
-#define F_SERVER 2048
-#define F_NXDOMAIN 4096
-#define F_QUERY 8192
-#define F_ADDN 16384
-#define F_NOERR 32768
+#define F_IMMORTAL (1u<<0)
+#define F_NAMEP (1u<<1)
+#define F_REVERSE (1u<<2)
+#define F_FORWARD (1u<<3)
+#define F_DHCP (1u<<4)
+#define F_NEG (1u<<5)
+#define F_HOSTS (1u<<6)
+#define F_IPV4 (1u<<7)
+#define F_IPV6 (1u<<8)
+#define F_BIGNAME (1u<<9)
+#define F_NXDOMAIN (1u<<10)
+#define F_CNAME (1u<<11)
+#define F_NOERR (1u<<12)
+#define F_CONFIG (1u<<13)
+/* below here are only valid as args to log_query: cache
+ entries are limited to 16 bits */
+#define F_UPSTREAM (1u<<16)
+#define F_RRNAME (1u<<17)
+#define F_SERVER (1u<<18)
+#define F_QUERY (1u<<19)
+#define F_NSRR (1u<<20)
+
/* struct sockaddr is not large enough to hold any address,
- and specifically not big enough to hold and IPv6 address.
+ and specifically not big enough to hold an IPv6 address.
Blech. Roll our own. */
union mysockaddr {
struct sockaddr sa;
struct sockaddr_in in;
-#ifdef HAVE_BROKEN_SOCKADDR_IN6
- /* early versions of glibc don't include sin6_scope_id in sockaddr_in6
- but latest kernels _require_ it to be set. The choice is to have
- dnsmasq fail to compile on back-level libc or fail to run
- on latest kernels with IPv6. Or to do this: sorry that it's so gross. */
- struct my_sockaddr_in6 {
- sa_family_t sin6_family; /* AF_INET6 */
- uint16_t sin6_port; /* transport layer port # */
- uint32_t sin6_flowinfo; /* IPv6 traffic class & flow info */
- struct in6_addr sin6_addr; /* IPv6 address */
- uint32_t sin6_scope_id; /* set of interfaces for a scope */
- } in6;
-#elif defined(HAVE_IPV6)
+#if defined(HAVE_IPV6)
struct sockaddr_in6 in6;
#endif
};
-#define SERV_FROM_RESOLV 1 /* 1 for servers from resolv, 0 for command line. */
-#define SERV_NO_ADDR 2 /* no server, this domain is local only */
-#define SERV_LITERAL_ADDRESS 4 /* addr is the answer, not the server */
-#define SERV_HAS_SOURCE 8 /* source address specified */
-#define SERV_HAS_DOMAIN 16 /* server for one domain only */
-#define SERV_FOR_NODOTS 32 /* server for names with no domain part only */
+#define SERV_FROM_RESOLV 1 /* 1 for servers from resolv, 0 for command line. */
+#define SERV_NO_ADDR 2 /* no server, this domain is local only */
+#define SERV_LITERAL_ADDRESS 4 /* addr is the answer, not the server */
+#define SERV_HAS_DOMAIN 8 /* server for one domain only */
+#define SERV_HAS_SOURCE 16 /* source address defined */
+#define SERV_FOR_NODOTS 32 /* server for names with no domain part only */
+#define SERV_WARNED_RECURSIVE 64 /* avoid warning spam */
+#define SERV_FROM_DBUS 128 /* 1 if source is DBus */
+#define SERV_MARK 256 /* for mark-and-delete */
#define SERV_TYPE (SERV_HAS_DOMAIN | SERV_FOR_NODOTS)
+#define SERV_COUNTED 512 /* workspace for log code */
+#define SERV_USE_RESOLV 1024 /* forward this domain in the normal way */
+#define SERV_NO_REBIND 2048 /* inhibit dns-rebind protection */
struct serverfd {
int fd;
union mysockaddr source_addr;
+ char interface[IF_NAMESIZE+1];
struct serverfd *next;
};
+struct randfd {
+ int fd;
+ unsigned short refcount, family;
+};
+
struct server {
union mysockaddr addr, source_addr;
- struct serverfd *sfd; /* non-NULL if this server has its own fd bound to
- a source port */
+ char interface[IF_NAMESIZE+1];
+ struct serverfd *sfd;
char *domain; /* set if this server only handles a domain. */
- int flags;
+ int flags, tcpfd;
+ unsigned int queries, failed_queries;
struct server *next;
};
struct irec {
union mysockaddr addr;
+ struct in_addr netmask; /* only valid for IPv4 */
+ int tftp_ok, mtu;
+ char *name;
struct irec *next;
};
struct listener {
- int fd, family;
+ int fd, tcpfd, tftpfd, family;
+ struct irec *iface; /* only valid for non-wildcard */
struct listener *next;
};
struct iname {
char *name;
union mysockaddr addr;
+ int isloop, used;
struct iname *next;
};
/* resolv-file parms from command-line */
struct resolvc {
struct resolvc *next;
- int is_default;
- int logged;
+ int is_default, logged;
+ time_t mtime;
char *name;
};
+/* adn-hosts parms from command-line (also dhcp-hostsfile and dhcp-optsfile */
+#define AH_DIR 1
+#define AH_INACTIVE 2
+struct hostsfile {
+ struct hostsfile *next;
+ int flags;
+ char *fname;
+ int index; /* matches to cache entries for logging */
+};
+
+#define FREC_NOREBIND 1
+#define FREC_CHECKING_DISABLED 2
+
struct frec {
union mysockaddr source;
struct all_addr dest;
- struct server *sentto;
+ struct server *sentto; /* NULL means free */
+ struct randfd *rfd4;
+#ifdef HAVE_IPV6
+ struct randfd *rfd6;
+#endif
+ unsigned int iface;
unsigned short orig_id, new_id;
- int fd;
+ int fd, forwardall, flags;
+ unsigned int crc;
time_t time;
struct frec *next;
};
+/* actions in the daemon->helper RPC */
+#define ACTION_DEL 1
+#define ACTION_OLD_HOSTNAME 2
+#define ACTION_OLD 3
+#define ACTION_ADD 4
+
struct dhcp_lease {
int clid_len; /* length of client identifier */
unsigned char *clid; /* clientid */
char *hostname, *fqdn; /* name from client-hostname option or config */
+ char *old_hostname; /* hostname before it moved to another lease */
+ char auth_name; /* hostname came from config, not from client */
+ char new; /* newly created */
+ char changed; /* modified */
+ char aux_changed; /* CLID or expiry changed */
time_t expires; /* lease expiry */
- unsigned char hwaddr[ETHER_ADDR_LEN];
- struct in_addr addr;
+#ifdef HAVE_BROKEN_RTC
+ unsigned int length;
+#endif
+ int hwaddr_len, hwaddr_type;
+ unsigned char hwaddr[DHCP_CHADDR_MAX];
+ struct in_addr addr, override, giaddr;
+ unsigned char *extradata;
+ unsigned int extradata_len, extradata_size;
+ int last_interface;
struct dhcp_lease *next;
};
+struct dhcp_netid {
+ char *net;
+ struct dhcp_netid *next;
+};
+
+struct dhcp_netid_list {
+ struct dhcp_netid *list;
+ struct dhcp_netid_list *next;
+};
+
+struct tag_if {
+ struct dhcp_netid_list *set;
+ struct dhcp_netid *tag;
+ struct tag_if *next;
+};
+
+struct hwaddr_config {
+ int hwaddr_len, hwaddr_type;
+ unsigned char hwaddr[DHCP_CHADDR_MAX];
+ unsigned int wildcard_mask;
+ struct hwaddr_config *next;
+};
+
struct dhcp_config {
+ unsigned int flags;
int clid_len; /* length of client identifier */
unsigned char *clid; /* clientid */
- unsigned char hwaddr[ETHER_ADDR_LEN];
- char *hostname;
+ char *hostname, *domain;
+ struct dhcp_netid_list *netid;
struct in_addr addr;
+ time_t decline_time;
unsigned int lease_time;
+ struct hwaddr_config *hwaddr;
struct dhcp_config *next;
};
+#define CONFIG_DISABLE 1
+#define CONFIG_CLID 2
+#define CONFIG_TIME 8
+#define CONFIG_NAME 16
+#define CONFIG_ADDR 32
+#define CONFIG_NOCLID 128
+#define CONFIG_FROM_ETHERS 256 /* entry created by /etc/ethers */
+#define CONFIG_ADDR_HOSTS 512 /* address added by from /etc/hosts */
+#define CONFIG_DECLINED 1024 /* address declined by client */
+#define CONFIG_BANK 2048 /* from dhcp hosts file */
+
struct dhcp_opt {
- int opt, len, is_addr;
+ int opt, len, flags;
+ union {
+ int encap;
+ unsigned int wildcard_mask;
+ unsigned char *vendor_class;
+ } u;
unsigned char *val;
- char *netid;
+ struct dhcp_netid *netid;
struct dhcp_opt *next;
- };
+};
+
+#define DHOPT_ADDR 1
+#define DHOPT_STRING 2
+#define DHOPT_ENCAPSULATE 4
+#define DHOPT_ENCAP_MATCH 8
+#define DHOPT_FORCE 16
+#define DHOPT_BANK 32
+#define DHOPT_ENCAP_DONE 64
+#define DHOPT_MATCH 128
+#define DHOPT_VENDOR 256
+#define DHOPT_HEX 512
+#define DHOPT_VENDOR_MATCH 1024
+#define DHOPT_RFC3925 2048
+
+struct dhcp_boot {
+ char *file, *sname;
+ struct in_addr next_server;
+ struct dhcp_netid *netid;
+ struct dhcp_boot *next;
+};
+
+struct pxe_service {
+ unsigned short CSA, type;
+ char *menu, *basename;
+ struct in_addr server;
+ struct dhcp_netid *netid;
+ struct pxe_service *next;
+};
+
+#define MATCH_VENDOR 1
+#define MATCH_USER 2
+#define MATCH_CIRCUIT 3
+#define MATCH_REMOTE 4
+#define MATCH_SUBSCRIBER 5
+
+/* vendorclass, userclass, remote-id or cicuit-id */
+struct dhcp_vendor {
+ int len, match_type, option;
+ char *data;
+ struct dhcp_netid netid;
+ struct dhcp_vendor *next;
+};
+
+struct dhcp_mac {
+ unsigned int mask;
+ int hwaddr_len, hwaddr_type;
+ unsigned char hwaddr[DHCP_CHADDR_MAX];
+ struct dhcp_netid netid;
+ struct dhcp_mac *next;
+};
+
+struct dhcp_bridge {
+ char iface[IF_NAMESIZE];
+ struct dhcp_bridge *alias, *next;
+};
+
+struct cond_domain {
+ char *domain;
+ struct in_addr start, end;
+ struct cond_domain *next;
+};
struct dhcp_context {
- unsigned int lease_time;
+ unsigned int lease_time, addr_epoch;
struct in_addr netmask, broadcast;
- struct in_addr start, end, last; /* range of available addresses */
- char *netid;
- struct dhcp_context *next;
+ struct in_addr local, router;
+ struct in_addr start, end; /* range of available addresses */
+ int flags;
+ char *interface;
+ struct dhcp_netid netid, *filter;
+ struct dhcp_context *next, *current;
};
-typedef unsigned char u8;
-typedef unsigned short u16;
-typedef unsigned int u32;
+#define CONTEXT_STATIC 1
+#define CONTEXT_NETMASK 2
+#define CONTEXT_BRDCAST 4
+#define CONTEXT_PROXY 8
+struct ping_result {
+ struct in_addr addr;
+ time_t time;
+ struct ping_result *next;
+};
+
+struct tftp_file {
+ int refcount, fd;
+ off_t size;
+ dev_t dev;
+ ino_t inode;
+ char filename[];
+};
-struct udp_dhcp_packet {
- struct ip ip;
- struct udphdr {
- u16 uh_sport; /* source port */
- u16 uh_dport; /* destination port */
- u16 uh_ulen; /* udp length */
- u16 uh_sum; /* udp checksum */
- } udp;
- struct dhcp_packet {
- u8 op, htype, hlen, hops;
- u32 xid;
- u16 secs, flags;
- struct in_addr ciaddr, yiaddr, siaddr, giaddr;
- u8 chaddr[16], sname[64], file[128];
- u32 cookie;
- u8 options[308];
- } data;
+struct tftp_transfer {
+ int sockfd;
+ time_t timeout;
+ int backoff;
+ unsigned int block, blocksize, expansion;
+ off_t offset;
+ union mysockaddr peer;
+ char opt_blocksize, opt_transize, netascii, carrylf;
+ struct tftp_file *file;
+ struct tftp_transfer *next;
};
+struct addr_list {
+ struct in_addr addr;
+ struct addr_list *next;
+};
+
+struct interface_list {
+ char *interface;
+ struct interface_list *next;
+};
+
+struct tftp_prefix {
+ char *interface;
+ char *prefix;
+ struct tftp_prefix *next;
+};
+
+
+extern struct daemon {
+ /* datastuctures representing the command-line and
+ config file arguments. All set (including defaults)
+ in option.c */
+
+ unsigned int options, options2;
+ struct resolvc default_resolv, *resolv_files;
+ time_t last_resolv;
+ struct mx_srv_record *mxnames;
+ struct naptr *naptr;
+ struct txt_record *txt;
+ struct ptr_record *ptr;
+ struct cname *cnames;
+ struct interface_name *int_names;
+ char *mxtarget;
+ char *lease_file;
+ char *username, *groupname, *scriptuser;
+ int group_set, osport;
+ char *domain_suffix;
+ struct cond_domain *cond_domain;
+ char *runfile;
+ char *lease_change_command;
+ struct iname *if_names, *if_addrs, *if_except, *dhcp_except;
+ struct bogus_addr *bogus_addr;
+ struct server *servers;
+ int log_fac; /* log facility */
+ char *log_file; /* optional log file */
+ int max_logs; /* queue limit */
+ int cachesize, ftabsize;
+ int port, query_port, min_port;
+ unsigned long local_ttl, neg_ttl, max_ttl;
+ struct hostsfile *addn_hosts;
+ struct dhcp_context *dhcp;
+ struct dhcp_config *dhcp_conf;
+ struct dhcp_opt *dhcp_opts, *dhcp_match;
+ struct dhcp_vendor *dhcp_vendors;
+ struct dhcp_mac *dhcp_macs;
+ struct dhcp_boot *boot_config;
+ struct pxe_service *pxe_services;
+ struct tag_if *tag_if;
+ struct addr_list *override_relays;
+ int override;
+ int enable_pxe;
+ struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names;
+ struct dhcp_netid_list *force_broadcast, *bootp_dynamic;
+ struct hostsfile *dhcp_hosts_file, *dhcp_opts_file;
+ int dhcp_max, tftp_max;
+ int dhcp_server_port, dhcp_client_port;
+ int start_tftp_port, end_tftp_port;
+ unsigned int min_leasetime;
+ struct doctor *doctors;
+ unsigned short edns_pktsz;
+ char *tftp_prefix;
+ struct tftp_prefix *if_prefix; /* per-interface TFTP prefixes */
+ struct interface_list *tftp_interfaces; /* interfaces for limited TFTP service */
+ int tftp_unlimited;
+
+ /* globally used stuff for DNS */
+ char *packet; /* packet buffer */
+ int packet_buff_sz; /* size of above */
+ char *namebuff; /* MAXDNAME size buffer */
+ unsigned int local_answer, queries_forwarded;
+ struct frec *frec_list;
+ struct serverfd *sfds;
+ struct irec *interfaces;
+ struct listener *listeners;
+ struct server *last_server;
+ time_t forwardtime;
+ int forwardcount;
+ struct server *srv_save; /* Used for resend on DoD */
+ size_t packet_len; /* " " */
+ struct randfd *rfd_save; /* " " */
+ pid_t tcp_pids[MAX_PROCS];
+ struct randfd randomsocks[RANDOM_SOCKS];
+ int v6pktinfo;
+
+ /* DHCP state */
+ int dhcpfd, helperfd, pxefd;
+#if defined(HAVE_LINUX_NETWORK)
+ int netlinkfd;
+#elif defined(HAVE_BSD_NETWORK)
+ int dhcp_raw_fd, dhcp_icmp_fd;
+#endif
+ struct iovec dhcp_packet;
+ char *dhcp_buff, *dhcp_buff2, *dhcp_buff3;
+ struct ping_result *ping_results;
+ FILE *lease_stream;
+ struct dhcp_bridge *bridges;
+
+ /* DBus stuff */
+ /* void * here to avoid depending on dbus headers outside dbus.c */
+ void *dbus;
+#ifdef HAVE_DBUS
+ struct watch *watches;
+#endif
+
+ /* TFTP stuff */
+ struct tftp_transfer *tftp_trans;
+
+} *daemon;
/* cache.c */
-void cache_init(int cachesize, int log);
-void log_query(unsigned short flags, char *name, struct all_addr *addr);
+void cache_init(void);
+void log_query(unsigned int flags, char *name, struct all_addr *addr, char *arg);
+char *record_source(int index);
+void querystr(char *str, unsigned short type);
struct crec *cache_find_by_addr(struct crec *crecp,
struct all_addr *addr, time_t now,
unsigned short prot);
char *name, time_t now, unsigned short prot);
void cache_end_insert(void);
void cache_start_insert(void);
-void cache_insert(char *name, struct all_addr *addr,
- time_t now, unsigned long ttl, unsigned short flags);
-void cache_reload(int opts, char *buff, char *domain_suffix, char *addn_hosts);
-void cache_add_dhcp_entry(char *host_name, struct in_addr *host_address,
- time_t ttd, unsigned short flags);
+struct crec *cache_insert(char *name, struct all_addr *addr,
+ time_t now, unsigned long ttl, unsigned short flags);
+void cache_reload(void);
+void cache_add_dhcp_entry(char *host_name, struct in_addr *host_address, time_t ttd);
void cache_unhash_dhcp(void);
-void dump_cache(int debug, int size);
+void dump_cache(time_t now);
char *cache_get_name(struct crec *crecp);
+char *get_domain(struct in_addr addr);
/* rfc1035.c */
-unsigned short extract_request(HEADER *header, unsigned int qlen, char *name);
-int setup_reply(HEADER *header, unsigned int qlen,
- struct all_addr *addrp, unsigned short flags,
- unsigned long local_ttl);
-void extract_addresses(HEADER *header, unsigned int qlen, char *namebuff,
- time_t now, struct doctor *doctors);
-void extract_neg_addrs(HEADER *header, unsigned int qlen, char *namebuff, time_t now);
-int answer_request(HEADER *header, char *limit, unsigned int qlen, char *mxname,
- char *mxtarget, unsigned int options, time_t now, unsigned long local_ttl,
- char *namebuff);
-int check_for_bogus_wildcard(HEADER *header, unsigned int qlen, char *name,
+unsigned int extract_request(struct dns_header *header, size_t qlen,
+ char *name, unsigned short *typep);
+size_t setup_reply(struct dns_header *header, size_t qlen,
+ struct all_addr *addrp, unsigned int flags,
+ unsigned long local_ttl);
+int extract_addresses(struct dns_header *header, size_t qlen, char *namebuff,
+ time_t now, int is_sign, int checkrebind, int checking_disabled);
+size_t answer_request(struct dns_header *header, char *limit, size_t qlen,
+ struct in_addr local_addr, struct in_addr local_netmask, time_t now);
+int check_for_bogus_wildcard(struct dns_header *header, size_t qlen, char *name,
struct bogus_addr *addr, time_t now);
+unsigned char *find_pseudoheader(struct dns_header *header, size_t plen,
+ size_t *len, unsigned char **p, int *is_sign);
+int check_for_local_domain(char *name, time_t now);
+unsigned int questions_crc(struct dns_header *header, size_t plen, char *buff);
+size_t resize_packet(struct dns_header *header, size_t plen,
+ unsigned char *pheader, size_t hlen);
+size_t add_mac(struct dns_header *header, size_t plen, char *limit, union mysockaddr *l3);
/* util.c */
+void rand_init(void);
unsigned short rand16(void);
-int legal_char(char c);
-int canonicalise(char *s);
-void die(char *message, char *arg1);
-void complain(char *message, char *arg1);
-void *safe_malloc(int size);
-char *safe_string_alloc(char *cp);
+int legal_hostname(char *c);
+char *canonicalise(char *s, int *nomem);
+unsigned char *do_rfc1035_name(unsigned char *p, char *sval);
+void *safe_malloc(size_t size);
+void safe_pipe(int *fd, int read_noblock);
+void *whine_malloc(size_t size);
int sa_len(union mysockaddr *addr);
int sockaddr_isequal(union mysockaddr *s1, union mysockaddr *s2);
-int hostname_isequal(unsigned char *a, unsigned char *b);
-time_t dnsmasq_time(int fd);
+int hostname_isequal(char *a, char *b);
+time_t dnsmasq_time(void);
+int is_same_net(struct in_addr a, struct in_addr b, struct in_addr mask);
+int retry_send(void);
+void prettyprint_time(char *buf, unsigned int t);
+int prettyprint_addr(union mysockaddr *addr, char *buf);
+int parse_hex(char *in, unsigned char *out, int maxlen,
+ unsigned int *wildcard_mask, int *mac_type);
+int memcmp_masked(unsigned char *a, unsigned char *b, int len,
+ unsigned int mask);
+int expand_buf(struct iovec *iov, size_t size);
+char *print_mac(char *buff, unsigned char *mac, int len);
+void bump_maxfd(int fd, int *max);
+int read_write(int fd, unsigned char *packet, int size, int rw);
+
+/* log.c */
+void die(char *message, char *arg1, int exit_code);
+int log_start(struct passwd *ent_pw, int errfd);
+int log_reopen(char *log_file);
+void my_syslog(int priority, const char *format, ...);
+void set_log_writer(fd_set *set, int *maxfdp);
+void check_log_writer(fd_set *set);
+void flush_log(void);
+
/* option.c */
-unsigned int read_opts(int argc, char **argv, char *buff, struct resolvc **resolv_file,
- char **mxname, char **mxtarget, char **lease_file,
- char **username, char **groupname,
- char **domain_suffix, char **runfile,
- struct iname **if_names, struct iname **if_addrs, struct iname **if_except,
- struct bogus_addr **bogus_addr, struct server **serv_addrs, int *cachesize,
- int *port, int *query_port, unsigned long *local_ttl, char **addn_hosts,
- struct dhcp_context **dhcp, struct dhcp_config **dhcp_conf, struct dhcp_opt **opts,
- char **dhcp_file, char **dhcp_sname, struct in_addr *dhcp_next_server,
- int *maxleases, unsigned int *min_leasetime, struct doctor **doctors);
+void read_opts (int argc, char **argv, char *compile_opts);
+char *option_string(unsigned char opt, int *is_ip, int *is_name);
+void reread_dhcp(void);
+void set_option_bool(unsigned int opt);
+struct hostsfile *expand_filelist(struct hostsfile *list);
/* forward.c */
-void forward_init(int first);
-struct server *reply_query(int fd, int options, char *packet, time_t now,
- char *dnamebuff, struct server *last_server,
- struct bogus_addr *bogus_nxdomain, struct doctor *doctors);
-
-struct server *receive_query(struct listener *listen, char *packet, char *mxname,
- char *mxtarget, unsigned int options, time_t now,
- unsigned long local_ttl, char *namebuff,
- struct iname *names, struct iname *addrs, struct iname *except,
- struct server *last_server, struct server *servers);
+void reply_query(int fd, int family, time_t now);
+void receive_query(struct listener *listen, time_t now);
+unsigned char *tcp_request(int confd, time_t now,
+ struct in_addr local_addr, struct in_addr netmask);
+void server_gone(struct server *server);
+struct frec *get_new_frec(time_t now, int *wait);
+
/* network.c */
-struct server *reload_servers(char *fname, char *buff, struct server *servers, int query_port);
-struct server *check_servers(struct server *new, struct irec *interfaces, struct serverfd **sfds);
-struct irec *enumerate_interfaces(struct iname *names,
- struct iname *addrs,
- struct iname *except,
- int port);
-struct listener *create_wildcard_listeners(int port);
-struct listener *create_bound_listeners(struct irec *interfaces);
+int indextoname(int fd, int index, char *name);
+int local_bind(int fd, union mysockaddr *addr, char *intname, int is_tcp);
+int random_sock(int family);
+void pre_allocate_sfds(void);
+int reload_servers(char *fname);
+void check_servers(void);
+int enumerate_interfaces();
+struct listener *create_wildcard_listeners(void);
+struct listener *create_bound_listeners(void);
+int iface_check(int family, struct all_addr *addr, char *name, int *indexp);
+int fix_fd(int fd);
+struct in_addr get_ifaddr(char *intr);
+
/* dhcp.c */
-void dhcp_init(int *fdp, int* rfdp);
-void dhcp_packet(struct dhcp_context *contexts, char *packet,
- struct dhcp_opt *dhcp_opts, struct dhcp_config *dhcp_configs,
- time_t now, char *namebuff, char *domain_suffix,
- char *dhcp_file, char *dhcp_sname,
- struct in_addr dhcp_next_server, int dhcp_fd, int raw_fd,
- struct iname *names, struct iname *addrs, struct iname *except);
-int address_available(struct dhcp_context *context, struct in_addr addr);
-int address_allocate(struct dhcp_context *context, struct dhcp_config *configs,
- struct in_addr *addrp);
+#ifdef HAVE_DHCP
+void dhcp_init(void);
+void dhcp_packet(time_t now, int pxe_fd);
+struct dhcp_context *address_available(struct dhcp_context *context,
+ struct in_addr addr,
+ struct dhcp_netid *netids);
+struct dhcp_context *narrow_context(struct dhcp_context *context,
+ struct in_addr taddr,
+ struct dhcp_netid *netids);
+int match_netid(struct dhcp_netid *check, struct dhcp_netid *pool, int negonly);
+int address_allocate(struct dhcp_context *context,
+ struct in_addr *addrp, unsigned char *hwaddr, int hw_len,
+ struct dhcp_netid *netids, time_t now);
+struct dhcp_netid *run_tag_if(struct dhcp_netid *input);
+int config_has_mac(struct dhcp_config *config, unsigned char *hwaddr, int len, int type);
struct dhcp_config *find_config(struct dhcp_config *configs,
struct dhcp_context *context,
unsigned char *clid, int clid_len,
- unsigned char *hwaddr, char *hostname);
-struct dhcp_config *read_ethers(struct dhcp_config *configs, char *buff);
+ unsigned char *hwaddr, int hw_len,
+ int hw_type, char *hostname);
void dhcp_update_configs(struct dhcp_config *configs);
-struct dhcp_config *dhcp_read_ethers(struct dhcp_config *configs, char *buff);
+void dhcp_read_ethers(void);
+void check_dhcp_hosts(int fatal);
+struct dhcp_config *config_find_by_address(struct dhcp_config *configs, struct in_addr addr);
+char *strip_hostname(char *hostname);
+char *host_from_dns(struct in_addr addr);
+char *get_domain(struct in_addr addr);
+#endif
+
/* lease.c */
-void lease_update_file(int force, time_t now);
-void lease_update_dns(void);
-int lease_init(char *lease_file, char *domain, char *buff,
- char *buff2, time_t now, int maxleases);
-struct dhcp_lease *lease_allocate(unsigned char *clid, int clid_len, struct in_addr addr);
-void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr);
-void lease_set_hostname(struct dhcp_lease *lease, char *name, char *suffix);
-void lease_set_expires(struct dhcp_lease *lease, time_t exp);
-struct dhcp_lease *lease_find_by_client(unsigned char *clid, int clid_len);
+#ifdef HAVE_DHCP
+void lease_update_file(time_t now);
+void lease_update_dns();
+void lease_init(time_t now);
+struct dhcp_lease *lease_allocate(struct in_addr addr);
+void lease_set_hwaddr(struct dhcp_lease *lease, unsigned char *hwaddr,
+ unsigned char *clid, int hw_len, int hw_type, int clid_len);
+void lease_set_hostname(struct dhcp_lease *lease, char *name, int auth);
+void lease_set_expires(struct dhcp_lease *lease, unsigned int len, time_t now);
+void lease_set_interface(struct dhcp_lease *lease, int interface);
+struct dhcp_lease *lease_find_by_client(unsigned char *hwaddr, int hw_len, int hw_type,
+ unsigned char *clid, int clid_len);
struct dhcp_lease *lease_find_by_addr(struct in_addr addr);
void lease_prune(struct dhcp_lease *target, time_t now);
-void lease_update_from_configs(struct dhcp_config *dhcp_configs, char *domain);
+void lease_update_from_configs(void);
+int do_script_run(time_t now);
+void rerun_scripts(void);
+#endif
+
/* rfc2131.c */
-int dhcp_reply(struct dhcp_context *context,
- struct in_addr iface_addr,
- char *iface_name,
- int iface_mtu,
- struct udp_dhcp_packet *rawpacket,
- unsigned int sz, time_t now, char *namebuff,
- struct dhcp_opt *dhcp_opts, struct dhcp_config *dhcp_configs,
- char *domain_suffix, char *dhcp_file, char *dhcp_sname,
- struct in_addr dhcp_next_server);
+#ifdef HAVE_DHCP
+size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
+ size_t sz, time_t now, int unicast_dest, int *is_inform, int pxe_fd);
+unsigned char *extended_hwaddr(int hwtype, int hwlen, unsigned char *hwaddr,
+ int clid_len, unsigned char *clid, int *len_out);
+#endif
+
+/* dnsmasq.c */
+#ifdef HAVE_DHCP
+int make_icmp_sock(void);
+int icmp_ping(struct in_addr addr);
+#endif
+void send_event(int fd, int event, int data);
+void clear_cache_and_reload(time_t now);
+void poll_resolv(int force, int do_reload, time_t now);
+
+/* netlink.c */
+#ifdef HAVE_LINUX_NETWORK
+void netlink_init(void);
+void netlink_multicast(void);
+#endif
+
+/* bpf.c */
+#ifdef HAVE_BSD_NETWORK
+void init_bpf(void);
+void send_via_bpf(struct dhcp_packet *mess, size_t len,
+ struct in_addr iface_addr, struct ifreq *ifr);
+#endif
+
+/* bpf.c or netlink.c */
+int iface_enumerate(int family, void *parm, int (callback)());
+
+/* dbus.c */
+#ifdef HAVE_DBUS
+char *dbus_init(void);
+void check_dbus_listeners(fd_set *rset, fd_set *wset, fd_set *eset);
+void set_dbus_listeners(int *maxfdp, fd_set *rset, fd_set *wset, fd_set *eset);
+# ifdef HAVE_DHCP
+void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname);
+# endif
+#endif
+
+/* helper.c */
+#if defined(HAVE_DHCP) && !defined(NO_FORK)
+int create_helper(int event_fd, int err_fd, uid_t uid, gid_t gid, long max_fd);
+void helper_write(void);
+void queue_script(int action, struct dhcp_lease *lease,
+ char *hostname, time_t now);
+int helper_buf_empty(void);
+#endif
+/* tftp.c */
+#ifdef HAVE_TFTP
+void tftp_request(struct listener *listen, time_t now);
+void check_tftp_listeners(fd_set *rset, time_t now);
+#endif
projects / people / ms / dnsmasq.git / blobdiff