NSD v3.2.4

1 files changed, 231 insertions, 0 deletions

diff --git a/usr.sbin/nsd/nsd.h b/usr.sbin/nsd/nsd.h
new file mode 100644
index 00000000000..b9678e2e8de
--- /dev/null
+++ b/usr.sbin/nsd/nsd.h
@@ -0,0 +1,231 @@
+/*
+ * nsd.h -- nsd(8) definitions and prototypes
+ *
+ * Copyright (c) 2001-2006, NLnet Labs. All rights reserved.
+ *
+ * See LICENSE for the license.
+ *
+ */
+
+#ifndef	_NSD_H_
+#define	_NSD_H_
+
+/* disable NSID no matter what, there is no typecode yet */
+#undef NSID
+
+#include <signal.h>
+
+#include "dns.h"
+#include "edns.h"
+struct netio_handler;
+struct nsd_options;
+
+/* The NSD runtime states and NSD ipc command values */
+#define	NSD_RUN	0
+#define	NSD_RELOAD 1
+#define	NSD_SHUTDOWN 2
+#define	NSD_STATS 3
+#define	NSD_REAP_CHILDREN 4
+#define	NSD_QUIT 5
+/*
+ * NSD_SOA_INFO is followed by u16(len in network byte order), dname,
+ * and then nothing (no info) or soa info.
+ */
+#define NSD_SOA_INFO 6
+/*
+ * PASS_TO_XFRD is followed by the u16(len in network order) and
+ * then network packet contents.  packet is a notify(acl checked), or
+ * xfr reply from a master(acl checked).
+ * followed by u32(acl number that matched from notify/xfr acl).
+ */
+#define NSD_PASS_TO_XFRD 7
+/*
+ * NSD_ZONE_STATE is followed by u16(len in network byte order),
+ * octet 0: zone is expired, 1: zone ok. and dname of zone.
+ */
+#define NSD_ZONE_STATE 8
+/*
+ * SOA BEGIN is sent at the start of a reload SOA_INFO pass
+ * xfrd will not send to the parent (deadlock prevention).
+ */
+#define NSD_SOA_BEGIN 9
+/*
+ * SOA END is sent at the end of a reload SOA_INFO pass.
+ * xfrd then knows that reload phase is over.
+ */
+#define NSD_SOA_END 10
+/*
+ * QUIT_SYNC is sent to signify a synchronisation of ipc
+ * channel content during reload
+ */
+#define NSD_QUIT_SYNC 11
+
+#define NSD_SERVER_MAIN 0x0U
+#define NSD_SERVER_UDP  0x1U
+#define NSD_SERVER_TCP  0x2U
+#define NSD_SERVER_BOTH (NSD_SERVER_UDP | NSD_SERVER_TCP)
+
+#ifdef INET6
+#define DEFAULT_AI_FAMILY AF_UNSPEC
+#else
+#define DEFAULT_AI_FAMILY AF_INET
+#endif
+
+#ifdef BIND8_STATS
+
+/* Counter for statistics */
+typedef	unsigned long stc_t;
+
+#define	LASTELEM(arr)	(sizeof(arr) / sizeof(arr[0]) - 1)
+
+#define	STATUP(nsd, stc) nsd->st.stc++
+/* #define	STATUP2(nsd, stc, i)  ((i) <= (LASTELEM(nsd->st.stc) - 1)) ? nsd->st.stc[(i)]++ : \
+				nsd->st.stc[LASTELEM(nsd->st.stc)]++ */
+
+#define	STATUP2(nsd, stc, i) nsd->st.stc[(i) <= (LASTELEM(nsd->st.stc) - 1) ? i : LASTELEM(nsd->st.stc)]++
+#else	/* BIND8_STATS */
+
+#define	STATUP(nsd, stc) /* Nothing */
+#define	STATUP2(nsd, stc, i) /* Nothing */
+
+#endif /* BIND8_STATS */
+
+struct nsd_socket
+{
+	struct addrinfo	*	addr;
+	int			s;
+};
+
+struct nsd_child
+{
+	 /* The type of child process (UDP or TCP handler). */
+	int   kind;
+
+	/* The child's process id.  */
+	pid_t pid;
+
+	/*
+	 * Socket used by the parent process to send commands and
+	 * receive responses to/from this child process.
+	 */
+	int child_fd;
+
+	/*
+	 * Socket used by the child process to receive commands and
+	 * send responses from/to the parent process.
+	 */
+	int parent_fd;
+
+	/*
+	 * IPC info, buffered for nonblocking writes to the child
+	 */
+	uint8_t need_to_send_STATS, need_to_send_QUIT;
+	uint8_t need_to_exit, has_exited;
+	stack_type* dirty_zones; /* stack of type zone_type* */
+
+	/*
+	 * The handler for handling the commands from the child.
+	 */
+	struct netio_handler* handler;
+};
+
+/* NSD configuration and run-time variables */
+typedef struct nsd nsd_type;
+struct	nsd
+{
+	/*
+	 * Global region that is not deallocated until NSD shuts down.
+	 */
+	region_type    *region;
+
+	/* Run-time variables */
+	pid_t		pid;
+	volatile sig_atomic_t mode;
+	volatile sig_atomic_t signal_hint_reload;
+	volatile sig_atomic_t signal_hint_child;
+	volatile sig_atomic_t signal_hint_quit;
+	volatile sig_atomic_t signal_hint_shutdown;
+	volatile sig_atomic_t signal_hint_stats;
+	volatile sig_atomic_t signal_hint_statsusr;
+	volatile sig_atomic_t quit_sync_done;
+	unsigned		server_kind;
+	struct namedb	*db;
+	int				debug;
+
+	size_t            child_count;
+	struct nsd_child *children;
+
+	/* NULL if this is the parent process. */
+	struct nsd_child *this_child;
+
+	/* Configuration */
+	const char		*dbfile;
+	const char		*pidfile;
+	const char		*log_filename;
+	const char		*username;
+	uid_t			uid;
+	gid_t			gid;
+	const char		*chrootdir;
+	const char		*version;
+	const char		*identity;
+	uint16_t		nsid_len;
+	unsigned char   *nsid;
+	uint8_t 		file_rotation_ok;
+
+	/* number of interfaces, ifs < MAX_INTERFACES */
+	size_t	ifs;
+	uint8_t grab_ip6_optional;
+
+	/* TCP specific configuration */
+	struct nsd_socket tcp[MAX_INTERFACES];
+
+	/* UDP specific configuration */
+	struct nsd_socket udp[MAX_INTERFACES];
+
+	edns_data_type edns_ipv4;
+#if defined(INET6)
+	edns_data_type edns_ipv6;
+#endif
+
+	int maximum_tcp_count;
+	int current_tcp_count;
+	int tcp_query_count;
+	int tcp_timeout;
+	size_t ipv4_edns_size;
+	size_t ipv6_edns_size;
+
+#ifdef	BIND8_STATS
+
+	struct nsdst {
+		time_t	boot;
+		int	period;		/* Produce statistics dump every st_period seconds */
+		stc_t	qtype[257];	/* Counters per qtype */
+		stc_t	qclass[4];	/* Class IN or Class CH or other */
+		stc_t	qudp, qudp6;	/* Number of queries udp and udp6 */
+		stc_t	ctcp, ctcp6;	/* Number of tcp and tcp6 connections */
+		stc_t	rcode[17], opcode[6]; /* Rcodes & opcodes */
+		/* Dropped, truncated, queries for nonconfigured zone, tx errors */
+		stc_t	dropped, truncated, wrongzone, txerr, rxerr;
+		stc_t 	edns, ednserr, raxfr, nona;
+	} st;
+#endif /* BIND8_STATS */
+
+	struct nsd_options* options;
+};
+
+/* nsd.c */
+pid_t readpid(const char *file);
+int writepid(struct nsd *nsd);
+void unlinkpid(const char* file);
+void sig_handler(int sig);
+void bind8_stats(struct nsd *nsd);
+
+/* server.c */
+int server_init(struct nsd *nsd);
+int server_prepare(struct nsd *nsd);
+void server_main(struct nsd *nsd);
+void server_child(struct nsd *nsd);
+/* extra domain numbers for temporary domains */
+#define EXTRA_DOMAIN_NUMBERS 1024
+
+#endif	/* _NSD_H_ */