1 /*
2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #ifndef KAMID_H
18 #define KAMID_H
19 
20 #include "compat.h"
21 
22 #include <event.h>
23 #include <limits.h>
24 #include <stdint.h>
25 #include <tls.h>
26 
27 /* TODO: make these customizable */
28 #define KD_CONF_FILE		"/etc/kamid.conf"
29 #define KD_USER			"_kamid"
30 #define KD_SOCKET		"/var/run/kamid.sock"
31 
32 #define IMSG_DATA_SIZE(imsg)	((imsg).hdr.len - IMSG_HEADER_SIZE)
33 
34 struct imsgev {
35 	struct imsgbuf	 ibuf;
36 	void		(*handler)(int, short, void *);
37 	struct event	 ev;
38 	short		 events;
39 };
40 
41 enum imsg_type {
42 	IMSG_NONE,
43 	IMSG_CTL_LOG_VERBOSE,
44 	IMSG_CTL_RELOAD,
45 	IMSG_CONTROLFD,
46 	IMSG_STARTUP,
47 	IMSG_RECONF_CONF,
48 	IMSG_RECONF_PKI,
49 	IMSG_RECONF_PKI_CERT,
50 	IMSG_RECONF_PKI_KEY,
51 	IMSG_RECONF_LISTEN,
52 	IMSG_RECONF_END,
53 	IMSG_AUTH,
54 	IMSG_AUTH_DIR,
55 	IMSG_AUTH_TLS,
56 	IMSG_CONN_GONE,
57 	IMSG_BUF,
58 };
59 
60 struct kd_options_conf {
61 	/* ... */
62 };
63 
64 enum table_type {
65 	T_NONE		= 0,
66 	T_HASH		= 0x01,
67 };
68 
69 struct table {
70 	char			 t_name[LINE_MAX];
71 	enum table_type		 t_type;
72 	char			 t_path[PATH_MAX];
73 	void			*t_handle;
74 	struct table_backend	*t_backend;
75 };
76 
77 struct table_backend {
78 	const char	*name;
79 	int		(*open)(struct table *);
80 	int		(*add)(struct table *, const char *, const char *);
81 	int		(*lookup)(struct table *, const char *, char **);
82 	void		(*close)(struct table *);
83 };
84 
85 /* table_static.c */
86 extern struct table_backend table_static;
87 
88 struct kd_listen_conf {
89 	SIMPLEQ_ENTRY(kd_listen_conf)	 entry;
90 	uint32_t			 id;
91 	int				 fd;
92 	char				 iface[LINE_MAX];
93 	uint16_t			 port;
94 	struct table			*auth_table;
95 	char				 pki[LINE_MAX];
96 	struct event			 ev;
97 	struct tls			*ctx;
98 };
99 
100 struct kd_pki_conf {
101 	SIMPLEQ_ENTRY(kd_pki_conf)	 entry;
102 	char				 name[LINE_MAX];
103 	uint8_t				*cert;
104 	size_t				 certlen;
105 	uint8_t				*key;
106 	size_t				 keylen;
107 	struct tls_config		*tlsconf;
108 };
109 
110 struct kd_tables_conf {
111 	SIMPLEQ_ENTRY(kd_tables_conf)	 entry;
112 	struct table			*table;
113 };
114 
115 struct kd_conf {
116 	struct kd_options_conf					 kd_options;
117 	SIMPLEQ_HEAD(kd_pki_conf_head, kd_pki_conf)		 pki_head;
118 	SIMPLEQ_HEAD(kd_tables_conf_head, kd_tables_conf)	 table_head;
119 	SIMPLEQ_HEAD(kd_listen_conf_head, kd_listen_conf)	 listen_head;
120 };
121 
122 /* kamid.c */
123 extern int verbose;
124 int	main_imsg_compose_listener(int, int, uint32_t, const void *, uint16_t);
125 void	merge_config(struct kd_conf *, struct kd_conf *);
126 void	imsg_event_add(struct imsgev *);
127 int	imsg_compose_event(struct imsgev *, uint16_t, uint32_t, pid_t,
128 	    int, const void *, uint16_t);
129 
130 struct kd_conf	*config_new_empty(void);
131 void		 config_clear(struct kd_conf *);
132 
133 /* parse.y */
134 struct kd_conf	*parse_config(const char *);
135 int		 cmdline_symset(char *);
136 
137 #endif