1 8d1b399b 2021-07-22 op /*
  2 8d1b399b 2021-07-22 op  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
  3 8d1b399b 2021-07-22 op  *
  4 8d1b399b 2021-07-22 op  * Permission to use, copy, modify, and distribute this software for any
  5 8d1b399b 2021-07-22 op  * purpose with or without fee is hereby granted, provided that the above
  6 8d1b399b 2021-07-22 op  * copyright notice and this permission notice appear in all copies.
  7 8d1b399b 2021-07-22 op  *
  8 8d1b399b 2021-07-22 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 8d1b399b 2021-07-22 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 8d1b399b 2021-07-22 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 8d1b399b 2021-07-22 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 8d1b399b 2021-07-22 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 8d1b399b 2021-07-22 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 8d1b399b 2021-07-22 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 8d1b399b 2021-07-22 op  */
 16 8d1b399b 2021-07-22 op 
 17 8d1b399b 2021-07-22 op #ifndef KAMID_H
 18 8d1b399b 2021-07-22 op #define KAMID_H
 19 8d1b399b 2021-07-22 op 
 20 8d1b399b 2021-07-22 op #include "compat.h"
 21 8d1b399b 2021-07-22 op 
 22 8d1b399b 2021-07-22 op #include <event.h>
 23 8d1b399b 2021-07-22 op #include <limits.h>
 24 8d1b399b 2021-07-22 op #include <stdint.h>
 25 8d1b399b 2021-07-22 op #include <tls.h>
 26 8d1b399b 2021-07-22 op 
 27 8d1b399b 2021-07-22 op /* TODO: make these customizable */
 28 8d1b399b 2021-07-22 op #define KD_CONF_FILE		"/etc/kamid.conf"
 29 8d1b399b 2021-07-22 op #define KD_USER			"_kamid"
 30 8d1b399b 2021-07-22 op #define KD_SOCKET		"/var/run/kamid.sock"
 31 8d1b399b 2021-07-22 op 
 32 8d1b399b 2021-07-22 op #define IMSG_DATA_SIZE(imsg)	((imsg).hdr.len - IMSG_HEADER_SIZE)
 33 8d1b399b 2021-07-22 op 
 34 36da10d7 2021-07-26 op #define MIN(a, b) ((a) < (b) ? (a) : (b))
 35 36da10d7 2021-07-26 op 
 36 8d1b399b 2021-07-22 op struct imsgev {
 37 8d1b399b 2021-07-22 op 	struct imsgbuf	 ibuf;
 38 8d1b399b 2021-07-22 op 	void		(*handler)(int, short, void *);
 39 8d1b399b 2021-07-22 op 	struct event	 ev;
 40 8d1b399b 2021-07-22 op 	short		 events;
 41 8d1b399b 2021-07-22 op };
 42 8d1b399b 2021-07-22 op 
 43 8d1b399b 2021-07-22 op enum imsg_type {
 44 8d1b399b 2021-07-22 op 	IMSG_NONE,
 45 8d1b399b 2021-07-22 op 	IMSG_CTL_LOG_VERBOSE,
 46 8d1b399b 2021-07-22 op 	IMSG_CTL_RELOAD,
 47 8d1b399b 2021-07-22 op 	IMSG_CONTROLFD,
 48 8d1b399b 2021-07-22 op 	IMSG_STARTUP,
 49 8d1b399b 2021-07-22 op 	IMSG_RECONF_CONF,
 50 8d1b399b 2021-07-22 op 	IMSG_RECONF_PKI,
 51 8d1b399b 2021-07-22 op 	IMSG_RECONF_PKI_CERT,
 52 8d1b399b 2021-07-22 op 	IMSG_RECONF_PKI_KEY,
 53 8d1b399b 2021-07-22 op 	IMSG_RECONF_LISTEN,
 54 8d1b399b 2021-07-22 op 	IMSG_RECONF_END,
 55 8d1b399b 2021-07-22 op 	IMSG_AUTH,
 56 8d1b399b 2021-07-22 op 	IMSG_AUTH_DIR,
 57 8d1b399b 2021-07-22 op 	IMSG_AUTH_TLS,
 58 8d1b399b 2021-07-22 op 	IMSG_CONN_GONE,
 59 8d1b399b 2021-07-22 op 	IMSG_BUF,
 60 8d1b399b 2021-07-22 op };
 61 8d1b399b 2021-07-22 op 
 62 8d1b399b 2021-07-22 op struct kd_options_conf {
 63 8d1b399b 2021-07-22 op 	/* ... */
 64 8d1b399b 2021-07-22 op };
 65 8d1b399b 2021-07-22 op 
 66 8d1b399b 2021-07-22 op enum table_type {
 67 8d1b399b 2021-07-22 op 	T_NONE		= 0,
 68 8d1b399b 2021-07-22 op 	T_HASH		= 0x01,
 69 8d1b399b 2021-07-22 op };
 70 8d1b399b 2021-07-22 op 
 71 8d1b399b 2021-07-22 op struct table {
 72 8d1b399b 2021-07-22 op 	char			 t_name[LINE_MAX];
 73 8d1b399b 2021-07-22 op 	enum table_type		 t_type;
 74 8d1b399b 2021-07-22 op 	char			 t_path[PATH_MAX];
 75 8d1b399b 2021-07-22 op 	void			*t_handle;
 76 8d1b399b 2021-07-22 op 	struct table_backend	*t_backend;
 77 8d1b399b 2021-07-22 op };
 78 8d1b399b 2021-07-22 op 
 79 8d1b399b 2021-07-22 op struct table_backend {
 80 8d1b399b 2021-07-22 op 	const char	*name;
 81 8d1b399b 2021-07-22 op 	int		(*open)(struct table *);
 82 8d1b399b 2021-07-22 op 	int		(*add)(struct table *, const char *, const char *);
 83 8d1b399b 2021-07-22 op 	int		(*lookup)(struct table *, const char *, char **);
 84 8d1b399b 2021-07-22 op 	void		(*close)(struct table *);
 85 8d1b399b 2021-07-22 op };
 86 8d1b399b 2021-07-22 op 
 87 8d1b399b 2021-07-22 op /* table_static.c */
 88 8d1b399b 2021-07-22 op extern struct table_backend table_static;
 89 8d1b399b 2021-07-22 op 
 90 fccfa871 2021-07-23 op #define L_NONE	0x0
 91 fccfa871 2021-07-23 op #define L_TLS	0x1
 92 8d1b399b 2021-07-22 op struct kd_listen_conf {
 93 8d1b399b 2021-07-22 op 	SIMPLEQ_ENTRY(kd_listen_conf)	 entry;
 94 8d1b399b 2021-07-22 op 	uint32_t			 id;
 95 fccfa871 2021-07-23 op 	uint32_t			 flags;
 96 8d1b399b 2021-07-22 op 	int				 fd;
 97 8d1b399b 2021-07-22 op 	char				 iface[LINE_MAX];
 98 8d1b399b 2021-07-22 op 	uint16_t			 port;
 99 8d1b399b 2021-07-22 op 	struct table			*auth_table;
100 8d1b399b 2021-07-22 op 	char				 pki[LINE_MAX];
101 8d1b399b 2021-07-22 op 	struct event			 ev;
102 8d1b399b 2021-07-22 op 	struct tls			*ctx;
103 8d1b399b 2021-07-22 op };
104 8d1b399b 2021-07-22 op 
105 8d1b399b 2021-07-22 op struct kd_pki_conf {
106 8d1b399b 2021-07-22 op 	SIMPLEQ_ENTRY(kd_pki_conf)	 entry;
107 8d1b399b 2021-07-22 op 	char				 name[LINE_MAX];
108 8d1b399b 2021-07-22 op 	uint8_t				*cert;
109 8d1b399b 2021-07-22 op 	size_t				 certlen;
110 8d1b399b 2021-07-22 op 	uint8_t				*key;
111 8d1b399b 2021-07-22 op 	size_t				 keylen;
112 8d1b399b 2021-07-22 op 	struct tls_config		*tlsconf;
113 8d1b399b 2021-07-22 op };
114 8d1b399b 2021-07-22 op 
115 8d1b399b 2021-07-22 op struct kd_tables_conf {
116 8d1b399b 2021-07-22 op 	SIMPLEQ_ENTRY(kd_tables_conf)	 entry;
117 8d1b399b 2021-07-22 op 	struct table			*table;
118 8d1b399b 2021-07-22 op };
119 8d1b399b 2021-07-22 op 
120 8d1b399b 2021-07-22 op struct kd_conf {
121 8d1b399b 2021-07-22 op 	struct kd_options_conf					 kd_options;
122 8d1b399b 2021-07-22 op 	SIMPLEQ_HEAD(kd_pki_conf_head, kd_pki_conf)		 pki_head;
123 8d1b399b 2021-07-22 op 	SIMPLEQ_HEAD(kd_tables_conf_head, kd_tables_conf)	 table_head;
124 8d1b399b 2021-07-22 op 	SIMPLEQ_HEAD(kd_listen_conf_head, kd_listen_conf)	 listen_head;
125 8d1b399b 2021-07-22 op };
126 8d1b399b 2021-07-22 op 
127 0ca6718e 2021-07-22 op struct kd_auth_req {
128 0ca6718e 2021-07-22 op 	uint32_t	listen_id;
129 0ca6718e 2021-07-22 op 	char		hash[128+1];
130 0ca6718e 2021-07-22 op };
131 0ca6718e 2021-07-22 op 
132 8850afbc 2021-07-25 op /*
133 8850afbc 2021-07-25 op  * 9p message header.
134 8850afbc 2021-07-25 op  *
135 8850afbc 2021-07-25 op  * The message itself is len bytes long (counting the whole header
136 8850afbc 2021-07-25 op  * too.)
137 8850afbc 2021-07-25 op  */
138 8850afbc 2021-07-25 op struct np_msg_header {
139 8850afbc 2021-07-25 op 	uint32_t	len;
140 8850afbc 2021-07-25 op 	uint8_t		type;
141 8850afbc 2021-07-25 op 	uint16_t	tag;
142 8850afbc 2021-07-25 op };
143 8850afbc 2021-07-25 op 
144 8850afbc 2021-07-25 op /* useful constants */
145 8850afbc 2021-07-25 op #define NOTAG		((uint16_t)~0U)
146 8850afbc 2021-07-25 op #define NOFID		((uint32_t)~0U)
147 8850afbc 2021-07-25 op #define NOUID		(-1)
148 8850afbc 2021-07-25 op 
149 8850afbc 2021-07-25 op /* 9p message types */
150 8850afbc 2021-07-25 op enum {
151 8850afbc 2021-07-25 op 	Tversion =	100,
152 8850afbc 2021-07-25 op 	Rversion,
153 8850afbc 2021-07-25 op 	Tauth =		102,
154 8850afbc 2021-07-25 op 	Rauth,
155 8850afbc 2021-07-25 op 	Tattach =	104,
156 8850afbc 2021-07-25 op 	Rattach,
157 8850afbc 2021-07-25 op 	Terror =	106,	/* illegal */
158 8850afbc 2021-07-25 op 	Rerror,
159 8850afbc 2021-07-25 op 	Tflush =	108,
160 8850afbc 2021-07-25 op 	Rflush,
161 8850afbc 2021-07-25 op 	Twalk =		110,
162 8850afbc 2021-07-25 op 	Rwalk,
163 8850afbc 2021-07-25 op 	Topen =		112,
164 8850afbc 2021-07-25 op 	Ropen,
165 8850afbc 2021-07-25 op 	Tcreate =	114,
166 8850afbc 2021-07-25 op 	Rcreate,
167 8850afbc 2021-07-25 op 	Tread =		116,
168 8850afbc 2021-07-25 op 	Rread,
169 8850afbc 2021-07-25 op 	Twrite =	118,
170 8850afbc 2021-07-25 op 	Rwrite,
171 8850afbc 2021-07-25 op 	Tclunk =	120,
172 8850afbc 2021-07-25 op 	Rclunk,
173 8850afbc 2021-07-25 op 	Tremove =	122,
174 8850afbc 2021-07-25 op 	Rremove,
175 8850afbc 2021-07-25 op 	Tstat =		124,
176 8850afbc 2021-07-25 op 	Rstat,
177 8850afbc 2021-07-25 op 	Twstat =	126,
178 8850afbc 2021-07-25 op 	Rwstat,
179 8850afbc 2021-07-25 op 	Tmax,
180 8850afbc 2021-07-25 op 
181 8850afbc 2021-07-25 op 	/*
182 8850afbc 2021-07-25 op 	 * plan9ports' include/fcall.h also has a
183 8850afbc 2021-07-25 op 	 *
184 8850afbc 2021-07-25 op 	 *	Topenfd = 98,
185 8850afbc 2021-07-25 op 	 *	Ropenfd,
186 8850afbc 2021-07-25 op 	 *
187 8850afbc 2021-07-25 op 	 * which it's not mentioned in the 9p "rfc" over at
188 8850afbc 2021-07-25 op 	 * 9p.cat-v.org.  Ignoring that for now.
189 8850afbc 2021-07-25 op 	 */
190 8850afbc 2021-07-25 op };
191 8850afbc 2021-07-25 op 
192 8d1b399b 2021-07-22 op /* kamid.c */
193 8d1b399b 2021-07-22 op extern int verbose;
194 8d1b399b 2021-07-22 op int	main_imsg_compose_listener(int, int, uint32_t, const void *, uint16_t);
195 8d1b399b 2021-07-22 op void	merge_config(struct kd_conf *, struct kd_conf *);
196 8d1b399b 2021-07-22 op void	imsg_event_add(struct imsgev *);
197 8d1b399b 2021-07-22 op int	imsg_compose_event(struct imsgev *, uint16_t, uint32_t, pid_t,
198 8d1b399b 2021-07-22 op 	    int, const void *, uint16_t);
199 8d1b399b 2021-07-22 op 
200 8d1b399b 2021-07-22 op struct kd_conf	*config_new_empty(void);
201 8d1b399b 2021-07-22 op void		 config_clear(struct kd_conf *);
202 8d1b399b 2021-07-22 op 
203 8d1b399b 2021-07-22 op /* parse.y */
204 8d1b399b 2021-07-22 op struct kd_conf	*parse_config(const char *);
205 8d1b399b 2021-07-22 op int		 cmdline_symset(char *);
206 8d1b399b 2021-07-22 op 
207 8d1b399b 2021-07-22 op #endif