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|
/* $OpenBSD: relayd.h,v 1.52 2007/06/12 15:16:10 msf Exp $ */
/*
* Copyright (c) 2006, 2007 Pierre-Yves Ritschard <pyr@spootnik.org>
* Copyright (c) 2006, 2007 Reyk Floeter <reyk@openbsd.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.
*/
#include <sys/tree.h>
#define CONF_FILE "/etc/hoststated.conf"
#define HOSTSTATED_SOCKET "/var/run/hoststated.sock"
#define PF_SOCKET "/dev/pf"
#define HOSTSTATED_USER "_hoststated"
#define HOSTSTATED_ANCHOR "hoststated"
#define CHECK_TIMEOUT 200
#define CHECK_INTERVAL 10
#define EMPTY_TABLE UINT_MAX
#define EMPTY_ID UINT_MAX
#define TABLE_NAME_SIZE 32
#define TAG_NAME_SIZE 64
#define SRV_NAME_SIZE 64
#define MAX_NAME_SIZE 64
#define SRV_MAX_VIRTS 16
#define RELAY_MAX_SESSIONS 1024
#define RELAY_TIMEOUT 600
#define RELAY_CACHESIZE -1 /* use default size */
#define RELAY_NUMPROC 5
#define RELAY_MAXPROC 32
#define RELAY_MAXHOSTS 32
#define RELAY_STATINTERVAL 60
#define RELAY_BACKLOG 10
#define SMALL_READ_BUF_SIZE 1024
#define READ_BUF_SIZE 65535
#define ICMP_BUF_SIZE 64
#define PURGE_TABLES 0x01
#define PURGE_SERVICES 0x02
#define PURGE_RELAYS 0x04
#define PURGE_PROTOS 0x08
#define PURGE_EVERYTHING 0xff
/* buffer */
struct buf {
TAILQ_ENTRY(buf) entry;
u_char *buf;
size_t size;
size_t max;
size_t wpos;
size_t rpos;
int fd;
};
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 imsg_fd {
TAILQ_ENTRY(imsg_fd) entry;
int fd;
};
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 hoststatectl requests */
IMSG_CTL_FAIL,
IMSG_CTL_END,
IMSG_CTL_SERVICE,
IMSG_CTL_TABLE,
IMSG_CTL_HOST,
IMSG_CTL_RELAY,
IMSG_CTL_TABLE_CHANGED,
IMSG_CTL_PULL_RULESET,
IMSG_CTL_PUSH_RULESET,
IMSG_CTL_SHOW_SUM, /* hoststatectl 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_CTL_NOTIFY,
IMSG_CTL_STATISTICS,
IMSG_SERVICE_ENABLE, /* notifies from pfe to hce */
IMSG_SERVICE_DISABLE,
IMSG_TABLE_ENABLE,
IMSG_TABLE_DISABLE,
IMSG_HOST_ENABLE,
IMSG_HOST_DISABLE,
IMSG_HOST_STATUS, /* notifies from hce to pfe */
IMSG_SYNC,
IMSG_NATLOOK,
IMSG_DEMOTE,
IMSG_STATISTICS,
IMSG_RECONF, /* reconfiguration notifies */
IMSG_RECONF_TABLE,
IMSG_RECONF_SENDBUF,
IMSG_RECONF_HOST,
IMSG_RECONF_SERVICE,
IMSG_RECONF_VIRT,
IMSG_RECONF_PROTO,
IMSG_RECONF_REQUEST_TREE,
IMSG_RECONF_RESPONSE_TREE,
IMSG_RECONF_PNODE_KEY,
IMSG_RECONF_PNODE_VAL,
IMSG_RECONF_RELAY,
IMSG_RECONF_END,
IMSG_SCRIPT
};
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;
int retry_cnt;
u_long check_cnt;
};
struct ctl_id {
objid_t id;
char name[MAX_NAME_SIZE];
};
struct ctl_script {
objid_t host;
int retval;
};
struct ctl_demote {
char group[IFNAMSIZ];
int level;
};
struct ctl_icmp_event {
struct hoststated *env;
int s;
int af;
int last_up;
struct event ev;
struct timeval tv_start;
};
struct ctl_tcp_event {
int s;
char *req;
struct buf *buf;
struct host *host;
struct table *table;
struct timeval tv_start;
struct event ev;
int (*validate_read)(struct ctl_tcp_event *);
int (*validate_close)(struct ctl_tcp_event *);
SSL *ssl;
char rbuf[SMALL_READ_BUF_SIZE];
};
enum httpmethod {
HTTP_METHOD_GET = 0,
HTTP_METHOD_HEAD = 1,
HTTP_METHOD_POST = 2,
HTTP_METHOD_PUT = 3,
HTTP_METHOD_DELETE = 4,
HTTP_METHOD_OPTIONS = 5,
HTTP_METHOD_TRACE = 6,
HTTP_METHOD_CONNECT = 7,
HTTP_METHOD_RESPONSE = 8 /* Server response */
};
enum direction {
RELAY_DIR_REQUEST = 0,
RELAY_DIR_RESPONSE = 1
};
struct ctl_relay_event {
int s;
in_port_t port;
struct sockaddr_storage ss;
struct bufferevent *bev;
struct evbuffer *output;
struct ctl_relay_event *dst;
void *con;
SSL *ssl;
u_int8_t *nodes;
struct proto_tree *tree;
char *path;
char *args;
char *version;
int marked;
int line;
size_t toread;
int chunked;
int done;
enum httpmethod method;
enum direction dir;
u_int8_t *buf;
int buflen;
u_int8_t flags;
};
struct ctl_natlook {
objid_t id;
int proc;
struct sockaddr_storage src;
struct sockaddr_storage dst;
struct sockaddr_storage rsrc;
struct sockaddr_storage rdst;
in_port_t rsport;
in_port_t rdport;
int in;
};
struct ctl_stats {
objid_t id;
int proc;
u_int interval;
u_long cnt;
u_long tick;
u_long avg;
u_long last;
u_long avg_hour;
u_long last_hour;
u_long avg_day;
u_long last_day;
};
struct address {
struct sockaddr_storage ss;
in_port_t port;
char ifname[IFNAMSIZ];
TAILQ_ENTRY(address) entry;
};
TAILQ_HEAD(addresslist, address);
#define F_DISABLE 0x0001
#define F_BACKUP 0x0002
#define F_USED 0x0004
#define F_DOWN 0x0008
#define F_ADD 0x0010
#define F_DEL 0x0020
#define F_CHANGED 0x0040
#define F_STICKY 0x0080
#define F_CHECK_DONE 0x0100
#define F_ACTIVE_RULESET 0x0200
#define F_CHECK_SENT 0x0400
#define F_SSL 0x0800
#define F_NATLOOK 0x1000
#define F_DEMOTE 0x2000
#define F_LOOKUP_PATH 0x4000
#define F_DEMOTED 0x8000
struct host_config {
objid_t id;
objid_t tableid;
int retry;
char name[MAXHOSTNAMELEN];
struct sockaddr_storage ss;
};
struct host {
TAILQ_ENTRY(host) entry;
struct host_config conf;
u_int16_t flags;
char *tablename;
int up;
int last_up;
u_long check_cnt;
u_long up_cnt;
int retry_cnt;
struct ctl_tcp_event cte;
};
TAILQ_HEAD(hostlist, host);
enum host_status {
HOST_DOWN = -1,
HOST_UNKNOWN = 0,
HOST_UP = 1
};
#define HOST_ISUP(x) (x == HOST_UP)
struct table_config {
objid_t id;
objid_t serviceid;
u_int16_t flags;
int check;
char demote_group[IFNAMSIZ];
struct timeval timeout;
in_port_t port;
int retcode;
char name[TABLE_NAME_SIZE];
char path[MAXPATHLEN];
char exbuf[64];
char digest[41]; /* length of sha1 digest * 2 */
};
struct table {
TAILQ_ENTRY(table) entry;
struct table_config conf;
int up;
struct hostlist hosts;
SSL_CTX *ssl_ctx;
int sendbuf_len;
char *sendbuf;
};
TAILQ_HEAD(tablelist, table);
enum table_check {
CHECK_NOCHECK = 0,
CHECK_ICMP = 1,
CHECK_TCP = 2,
CHECK_HTTP_CODE = 3,
CHECK_HTTP_DIGEST = 4,
CHECK_SEND_EXPECT = 5,
CHECK_SCRIPT = 6
};
struct service_config {
objid_t id;
u_int16_t flags;
in_port_t port;
objid_t table_id;
objid_t backup_id;
char name[SRV_NAME_SIZE];
char tag[TAG_NAME_SIZE];
};
struct service {
TAILQ_ENTRY(service) entry;
struct service_config conf;
struct addresslist virts;
struct table *table;
struct table *backup; /* use this if no host up */
};
TAILQ_HEAD(servicelist, service);
struct session {
objid_t id;
struct ctl_relay_event in;
struct ctl_relay_event out;
u_int32_t outkey;
struct event ev;
struct timeval timeout;
struct timeval tv_start;
struct timeval tv_last;
int done;
int retry;
struct evbuffer *log;
void *relay;
struct ctl_natlook *cnl;
TAILQ_ENTRY(session) entry;
};
TAILQ_HEAD(sessionlist, session);
enum nodeaction {
NODE_ACTION_NONE = 0,
NODE_ACTION_APPEND = 1,
NODE_ACTION_CHANGE = 2,
NODE_ACTION_REMOVE = 3,
NODE_ACTION_EXPECT = 4,
NODE_ACTION_FILTER = 5,
NODE_ACTION_HASH = 6,
NODE_ACTION_LOG = 7
};
enum nodetype {
NODE_TYPE_HEADER = 0,
NODE_TYPE_URL = 1,
NODE_TYPE_COOKIE = 2,
NODE_TYPE_PATH = 3
};
#define PNFLAG_MACRO 0x01
#define PNFLAG_MARK 0x02
#define PNFLAG_LOG 0x04
#define PNFLAG_LOOKUP_URL 0x08
#define PNFLAG_LOOKUP_COOKIE 0x10
enum noderesult {
PN_DROP = 0,
PN_PASS = 1,
PN_FAIL = -1
};
struct protonode {
objid_t id;
char *key;
enum nodeaction action;
char *value;
u_int8_t flags;
enum nodetype type;
RB_ENTRY(protonode) nodes;
};
RB_HEAD(proto_tree, protonode);
enum prototype {
RELAY_PROTO_TCP = 0,
RELAY_PROTO_HTTP = 1
};
#define TCPFLAG_NODELAY 0x01
#define TCPFLAG_NNODELAY 0x02
#define TCPFLAG_SACK 0x04
#define TCPFLAG_NSACK 0x08
#define TCPFLAG_BUFSIZ 0x10
#define TCPFLAG_IPTTL 0x20
#define TCPFLAG_IPMINTTL 0x40
#define TCPFLAG_DEFAULT 0x00
#define SSLFLAG_SSLV2 0x01
#define SSLFLAG_SSLV3 0x02
#define SSLFLAG_TLSV1 0x04
#define SSLFLAG_VERSION 0x07
#define SSLFLAG_DEFAULT (SSLFLAG_SSLV3|SSLFLAG_TLSV1)
#define SSLCIPHERS_DEFAULT "HIGH:!ADH"
struct protocol {
objid_t id;
u_int16_t flags;
u_int8_t tcpflags;
int tcpbufsiz;
int tcpbacklog;
u_int8_t tcpipttl;
u_int8_t tcpipminttl;
u_int8_t sslflags;
char sslciphers[32];
char name[MAX_NAME_SIZE];
int cache;
enum prototype type;
int lateconnect;
int request_nodes;
struct proto_tree request_tree;
int response_nodes;
struct proto_tree response_tree;
TAILQ_ENTRY(protocol) entry;
};
TAILQ_HEAD(protolist, protocol);
struct relay_config {
objid_t id;
u_int16_t flags;
objid_t proto;
char name[MAXHOSTNAMELEN];
in_port_t port;
in_port_t dstport;
int dstmode;
int dstcheck;
int dstretry;
objid_t dsttable;
struct sockaddr_storage ss;
struct sockaddr_storage dstss;
struct timeval timeout;
};
struct relay {
TAILQ_ENTRY(relay) entry;
struct relay_config conf;
int up;
struct protocol *proto;
int s;
struct bufferevent *bev;
int dsts;
struct bufferevent *dstbev;
struct table *dsttable;
u_int32_t dstkey;
struct host *dsthost[RELAY_MAXHOSTS];
int dstnhosts;
struct event ev;
SSL_CTX *ctx;
struct ctl_stats stats[RELAY_MAXPROC + 1];
struct sessionlist sessions;
};
TAILQ_HEAD(relaylist, relay);
enum dstmode {
RELAY_DSTMODE_LOADBALANCE = 0,
RELAY_DSTMODE_ROUNDROBIN = 1,
RELAY_DSTMODE_HASH = 2
};
#define RELAY_DSTMODE_DEFAULT RELAY_DSTMODE_LOADBALANCE
enum {
PROC_MAIN,
PROC_PFE,
PROC_HCE,
PROC_RELAY
} hoststated_process;
struct hoststated {
u_int8_t opts;
u_int16_t flags;
const char *confpath;
struct pfdata *pf;
int tablecount;
int servicecount;
int protocount;
int relaycount;
struct timeval interval;
struct timeval timeout;
struct table empty_table;
struct protocol proto_default;
struct event ev;
struct tablelist *tables;
struct servicelist *services;
struct protolist protos;
struct relaylist relays;
u_int16_t prefork_relay;
char demote_group[IFNAMSIZ];
u_int16_t id;
struct event statev;
struct timeval statinterval;
int has_icmp;
int has_icmp6;
struct ctl_icmp_event icmp_send;
struct ctl_icmp_event icmp_recv;
struct ctl_icmp_event icmp6_send;
struct ctl_icmp_event icmp6_recv;
};
#define HOSTSTATED_OPT_VERBOSE 0x01
#define HOSTSTATED_OPT_NOACTION 0x04
#define HOSTSTATED_OPT_LOGUPDATE 0x08
#define HOSTSTATED_OPT_LOGNOTIFY 0x10
#define HOSTSTATED_OPT_LOGALL 0x18
/* 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;
u_int8_t flags;
#define CTL_CONN_NOTIFY 0x01
struct imsgbuf ibuf;
};
TAILQ_HEAD(ctl_connlist, ctl_conn);
/* control.c */
int control_init(void);
int control_listen(struct hoststated *, struct imsgbuf *);
void control_accept(int, short, void *);
void control_dispatch_imsg(int, short, void *);
void control_imsg_forward(struct imsg *);
void control_cleanup(void);
void session_socket_blockmode(int, enum blockmodes);
extern struct ctl_connlist ctl_conns;
/* parse.y */
struct hoststated *parse_config(const char *, int);
int cmdline_symset(char *);
/* 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 *);
const char *host_status(enum host_status);
const char *table_check(enum table_check);
const char *print_availability(u_long, u_long);
/* 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);
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,
int, 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 */
int imsg_get_fd(struct imsgbuf *);
/* pfe.c */
pid_t pfe(struct hoststated *, int [2], int [2], int [RELAY_MAXPROC][2],
int [2], int [RELAY_MAXPROC][2]);
void show(struct ctl_conn *);
int enable_service(struct ctl_conn *, struct ctl_id *);
int enable_table(struct ctl_conn *, struct ctl_id *);
int enable_host(struct ctl_conn *, struct ctl_id *);
int disable_service(struct ctl_conn *, struct ctl_id *);
int disable_table(struct ctl_conn *, struct ctl_id *);
int disable_host(struct ctl_conn *, struct ctl_id *);
/* pfe_filter.c */
void init_filter(struct hoststated *);
void init_tables(struct hoststated *);
void flush_table(struct hoststated *, struct service *);
void sync_table(struct hoststated *, struct service *, struct table *);
void sync_ruleset(struct hoststated *, struct service *, int);
void flush_rulesets(struct hoststated *);
int natlook(struct hoststated *, struct ctl_natlook *);
/* hce.c */
pid_t hce(struct hoststated *, int [2], int [2], int [RELAY_MAXPROC][2],
int [2], int [RELAY_MAXPROC][2]);
void hce_notify_done(struct host *, const char *);
/* relay.c */
pid_t relay(struct hoststated *, int [2], int [2], int [RELAY_MAXPROC][2],
int [2], int [RELAY_MAXPROC][2]);
void relay_notify_done(struct host *, const char *);
RB_PROTOTYPE(proto_tree, protonode, nodes, relay_proto_cmp);
/* check_icmp.c */
void icmp_init(struct hoststated *);
void schedule_icmp(struct hoststated *, struct host *);
void check_icmp(struct hoststated *, struct timeval *);
/* check_tcp.c */
void check_tcp(struct ctl_tcp_event *);
/* check_script.c */
void check_script(struct host *);
void script_done(struct hoststated *, struct ctl_script *);
int script_exec(struct hoststated *, struct ctl_script *);
/* ssl.c */
void ssl_init(struct hoststated *);
void ssl_transaction(struct ctl_tcp_event *);
SSL_CTX *ssl_ctx_create(struct hoststated *);
void ssl_error(const char *, const char *);
/* hoststated.c */
struct host *host_find(struct hoststated *, objid_t);
struct table *table_find(struct hoststated *, objid_t);
struct service *service_find(struct hoststated *, objid_t);
struct host *host_findbyname(struct hoststated *, const char *);
struct table *table_findbyname(struct hoststated *, const char *);
struct service *service_findbyname(struct hoststated *, const char *);
void event_again(struct event *, int, short,
void (*)(int, short, void *),
struct timeval *, struct timeval *, void *);
struct relay *relay_find(struct hoststated *, objid_t);
struct session *session_find(struct hoststated *, objid_t);
struct relay *relay_findbyname(struct hoststated *, const char *);
int expand_string(char *, size_t, const char *, const char *);
void purge_config(struct hoststated *, u_int8_t);
void merge_config(struct hoststated *, struct hoststated *);
/* carp.c */
int carp_demote_init(char *, int);
void carp_demote_shutdown(void);
int carp_demote_get(char *);
int carp_demote_set(char *, int);
int carp_demote_reset(char *, int);
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