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/*
* Copyright (c) 2006 Pierre-Yves Ritschard <pyr@spootnik.org>
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define CONF_FILE "/etc/hostated.conf"
#define HOSTATED_SOCKET "/var/run/hostated.sock"
#define PF_SOCKET "/dev/pf"
#define HOSTATED_USER "_hostated"
#define HOSTATED_ANCHOR "hostated"
#define CONNECT_TIMEOUT 200
#define CHECK_INTERVAL 10
#define EMPTY_TABLE UINT_MAX
#define TABLE_NAME_SIZE 16
#define TAG_NAME_SIZE 16
#define SRV_NAME_SIZE 16
#define SRV_MAX_VIRTS 16
#define READ_BUF_SIZE 65535
/* buffer */
struct buf {
TAILQ_ENTRY(buf) entry;
u_char *buf;
size_t size;
size_t max;
size_t wpos;
size_t rpos;
};
struct msgbuf {
TAILQ_HEAD(, buf) bufs;
u_int32_t queued;
int fd;
};
#define IMSG_HEADER_SIZE sizeof(struct imsg_hdr)
#define MAX_IMSGSIZE 8192
struct buf_read {
u_char buf[READ_BUF_SIZE];
u_char *rptr;
size_t wpos;
};
struct imsgbuf {
TAILQ_HEAD(, imsg_fd) fds;
struct buf_read r;
struct msgbuf w;
struct event ev;
void (*handler)(int, short, void *);
int fd;
pid_t pid;
short events;
};
enum imsg_type {
IMSG_NONE,
IMSG_CTL_OK, /* answer to hostatectl requests */
IMSG_CTL_FAIL,
IMSG_CTL_END,
IMSG_CTL_SERVICE,
IMSG_CTL_TABLE,
IMSG_CTL_HOST,
IMSG_CTL_SHOW_SUM, /* hostatectl requests */
IMSG_CTL_SERVICE_ENABLE,
IMSG_CTL_SERVICE_DISABLE,
IMSG_CTL_TABLE_ENABLE,
IMSG_CTL_TABLE_DISABLE,
IMSG_CTL_HOST_ENABLE,
IMSG_CTL_HOST_DISABLE,
IMSG_CTL_SHUTDOWN,
IMSG_CTL_RELOAD,
IMSG_SERVICE_ENABLE, /* notifies from pfe to hce */
IMSG_SERVICE_DISABLE,
IMSG_TABLE_ENABLE,
IMSG_TABLE_DISABLE,
IMSG_HOST_ENABLE,
IMSG_HOST_DISABLE,
IMSG_TABLE_STATUS, /* notifies from hce to pfe */
IMSG_HOST_STATUS,
IMSG_SYNC
};
struct imsg_hdr {
enum imsg_type type;
u_int16_t len;
u_int32_t peerid;
pid_t pid;
};
struct imsg {
struct imsg_hdr hdr;
void *data;
};
typedef u_int32_t objid_t;
struct ctl_status {
objid_t id;
int up;
};
struct address {
struct sockaddr_storage ss;
in_port_t port;
char ifname[IFNAMSIZ];
TAILQ_ENTRY(address) entry;
};
TAILQ_HEAD(addresslist, address);
#define F_DISABLE 0x01
#define F_BACKUP 0x02
#define F_USED 0x04
#define F_ACTIVE_RULESET 0x04
#define F_DOWN 0x08
#define F_ADD 0x10
#define F_DEL 0x20
#define F_CHANGED 0x40
struct host {
u_int8_t flags;
objid_t id;
objid_t tableid;
char *tablename;
char name[MAXHOSTNAMELEN];
int up;
#define HOST_DOWN -1
#define HOST_UNKNOWN 0
#define HOST_UP 1
struct sockaddr_storage ss;
TAILQ_ENTRY(host) entry;
};
TAILQ_HEAD(hostlist, host);
struct table {
objid_t id;
objid_t serviceid;
u_int8_t flags;
int check;
#define CHECK_NOCHECK 0
#define CHECK_ICMP 1
#define CHECK_TCP 2
#define CHECK_HTTP_CODE 3
#define CHECK_HTTP_DIGEST 4
int up;
in_port_t port;
int retcode;
int timeout;
char name[TABLE_NAME_SIZE];
char path[MAXPATHLEN];
char digest[41]; /* length of sha1 digest * 2 */
struct hostlist hosts;
TAILQ_ENTRY(table) entry;
};
TAILQ_HEAD(tablelist, table);
struct service {
objid_t id;
u_int8_t flags;
in_port_t port;
char name[SRV_NAME_SIZE];
char tag[TAG_NAME_SIZE];
struct addresslist virts;
struct table *table;
struct table *backup; /* use this if no host up */
TAILQ_ENTRY(service) entry;
};
TAILQ_HEAD(servicelist, service);
enum {
PROC_MAIN,
PROC_PFE,
PROC_HCE
} hostated_process;
struct hostated {
u_int8_t opts;
#define HOSTATED_OPT_VERBOSE 0x01
#define HOSTATED_OPT_NOACTION 0x04
struct pfdata *pf;
int interval;
int icmp_sock;
int icmp6_sock;
int tablecount;
int servicecount;
struct table empty_table;
struct event ev;
struct tablelist tables;
struct servicelist services;
};
/* initially control.h */
struct {
struct event ev;
int fd;
} control_state;
enum blockmodes {
BM_NORMAL,
BM_NONBLOCK
};
struct ctl_conn {
TAILQ_ENTRY(ctl_conn) entry;
struct imsgbuf ibuf;
};
TAILQ_HEAD(ctl_connlist, ctl_conn);
/* control.c */
int control_init(void);
int control_listen(void);
void control_accept(int, short, void *);
void control_dispatch_imsg(int, short, void *);
int control_imsg_relay(struct imsg *);
void control_cleanup(void);
void session_socket_blockmode(int, enum blockmodes);
extern struct ctl_connlist ctl_conns;
/* parse.y */
int parse_config(struct hostated *, const char *, int);
/* log.c */
void log_init(int);
void log_warn(const char *, ...);
void log_warnx(const char *, ...);
void log_info(const char *, ...);
void log_debug(const char *, ...);
void fatal(const char *);
void fatalx(const char *);
/* buffer.c */
struct buf *buf_open(size_t);
struct buf *buf_dynamic(size_t, size_t);
int buf_add(struct buf *, void *, size_t);
void *buf_reserve(struct buf *, size_t);
void *buf_seek(struct buf *, size_t, size_t);
int buf_close(struct msgbuf *, struct buf *);
void buf_free(struct buf *);
void msgbuf_init(struct msgbuf *);
void msgbuf_clear(struct msgbuf *);
int msgbuf_write(struct msgbuf *);
/* imsg.c */
void imsg_init(struct imsgbuf *, int, void (*)(int, short, void *));
ssize_t imsg_read(struct imsgbuf *);
ssize_t imsg_get(struct imsgbuf *, struct imsg *);
int imsg_compose(struct imsgbuf *, enum imsg_type, u_int32_t, pid_t,
void *, u_int16_t);
struct buf *imsg_create(struct imsgbuf *, enum imsg_type, u_int32_t, pid_t,
u_int16_t);
int imsg_add(struct buf *, void *, u_int16_t);
int imsg_close(struct imsgbuf *, struct buf *);
void imsg_free(struct imsg *);
void imsg_event_add(struct imsgbuf *); /* needs to be provided externally */
/* pfe.c */
pid_t pfe(struct hostated *, int [2], int [2], int [2]);
void show(struct ctl_conn *);
int enable_service(struct ctl_conn *, objid_t);
int enable_table(struct ctl_conn *, objid_t);
int enable_host(struct ctl_conn *, objid_t);
int disable_service(struct ctl_conn *, objid_t);
int disable_table(struct ctl_conn *, objid_t);
int disable_host(struct ctl_conn *, objid_t);
/* pfe_filter.c */
void init_filter(struct hostated *);
void init_tables(struct hostated *);
void flush_table(struct hostated *, struct service *);
void sync_table(struct hostated *, struct service *, struct table *);
void sync_ruleset(struct hostated *, struct service *, int);
void flush_rulesets(struct hostated *);
/* hce.c */
pid_t hce(struct hostated *, int [2], int [2], int [2]);
/* check_icmp.c */
int check_icmp(struct host *, int, int, int);
/* check_tcp.c */
int check_tcp(struct host *, struct table *);
int tcp_connect(struct host *, struct table *);
/* check_tcp.c */
int check_http_code(struct host *, struct table *);
int check_http_digest(struct host *, struct table *);
/* hostated.c */
struct host *host_find(struct hostated *, objid_t);
struct table *table_find(struct hostated *, objid_t);
struct service *service_find(struct hostated *, objid_t);
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