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Date:: Tue Sep 13 16:36:38 2022 UTC
Message:: initial import
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  1 b0a6bcf7 2022-09-13 op /*
  2 b0a6bcf7 2022-09-13 op  * Copyright (c) 2010-2015 Reyk Floeter <reyk@openbsd.org>
  3 b0a6bcf7 2022-09-13 op  *
  4 b0a6bcf7 2022-09-13 op  * Permission to use, copy, modify, and distribute this software for any
  5 b0a6bcf7 2022-09-13 op  * purpose with or without fee is hereby granted, provided that the above
  6 b0a6bcf7 2022-09-13 op  * copyright notice and this permission notice appear in all copies.
  7 b0a6bcf7 2022-09-13 op  *
  8 b0a6bcf7 2022-09-13 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 b0a6bcf7 2022-09-13 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 b0a6bcf7 2022-09-13 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 b0a6bcf7 2022-09-13 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 b0a6bcf7 2022-09-13 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 b0a6bcf7 2022-09-13 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 b0a6bcf7 2022-09-13 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 b0a6bcf7 2022-09-13 op  */
 16 b0a6bcf7 2022-09-13 op 
 17 b0a6bcf7 2022-09-13 op /* imsg */
 18 b0a6bcf7 2022-09-13 op struct imsgev {
 19 b0a6bcf7 2022-09-13 op 	struct imsgbuf		 ibuf;
 20 b0a6bcf7 2022-09-13 op 	void			(*handler)(int, short, void *);
 21 b0a6bcf7 2022-09-13 op 	struct event		 ev;
 22 b0a6bcf7 2022-09-13 op 	struct privsep_proc	*proc;
 23 b0a6bcf7 2022-09-13 op 	void			*data;
 24 b0a6bcf7 2022-09-13 op 	short			 events;
 25 b0a6bcf7 2022-09-13 op };
 26 b0a6bcf7 2022-09-13 op 
 27 b0a6bcf7 2022-09-13 op #define IMSG_SIZE_CHECK(imsg, p) do {					\
 28 b0a6bcf7 2022-09-13 op 	if (IMSG_DATA_SIZE(imsg) < sizeof(*p))				\
 29 b0a6bcf7 2022-09-13 op 		fatalx("bad length imsg received (%s)",	#p);		\
 30 b0a6bcf7 2022-09-13 op } while (0)
 31 b0a6bcf7 2022-09-13 op #define IMSG_DATA_SIZE(imsg)	((imsg)->hdr.len - IMSG_HEADER_SIZE)
 32 b0a6bcf7 2022-09-13 op 
 33 b0a6bcf7 2022-09-13 op /* privsep */
 34 b0a6bcf7 2022-09-13 op enum privsep_procid {
 35 b0a6bcf7 2022-09-13 op 	PROC_PARENT,
 36 b0a6bcf7 2022-09-13 op 	PROC_PROXY,
 37 b0a6bcf7 2022-09-13 op 	PROC_MAX,
 38 b0a6bcf7 2022-09-13 op };
 39 b0a6bcf7 2022-09-13 op 
 40 b0a6bcf7 2022-09-13 op #define CONFIG_RELOAD		0x00
 41 b0a6bcf7 2022-09-13 op #define CONFIG_SOCKS		0x01
 42 b0a6bcf7 2022-09-13 op #define CONFIG_ALL		0xff
 43 b0a6bcf7 2022-09-13 op 
 44 b0a6bcf7 2022-09-13 op struct privsep_pipes {
 45 b0a6bcf7 2022-09-13 op 	int				*pp_pipes[PROC_MAX];
 46 b0a6bcf7 2022-09-13 op };
 47 b0a6bcf7 2022-09-13 op 
 48 b0a6bcf7 2022-09-13 op struct privsep {
 49 b0a6bcf7 2022-09-13 op 	struct privsep_pipes		*ps_pipes[PROC_MAX];
 50 b0a6bcf7 2022-09-13 op 	struct privsep_pipes		*ps_pp;
 51 b0a6bcf7 2022-09-13 op 
 52 b0a6bcf7 2022-09-13 op 	struct imsgev			*ps_ievs[PROC_MAX];
 53 b0a6bcf7 2022-09-13 op 	const char			*ps_title[PROC_MAX];
 54 b0a6bcf7 2022-09-13 op 	uint8_t				 ps_what[PROC_MAX];
 55 b0a6bcf7 2022-09-13 op 
 56 b0a6bcf7 2022-09-13 op 	struct passwd			*ps_pw;
 57 b0a6bcf7 2022-09-13 op 	int				 ps_noaction;
 58 b0a6bcf7 2022-09-13 op 
 59 b0a6bcf7 2022-09-13 op 	unsigned int			 ps_instances[PROC_MAX];
 60 b0a6bcf7 2022-09-13 op 	unsigned int			 ps_instance;
 61 b0a6bcf7 2022-09-13 op 
 62 b0a6bcf7 2022-09-13 op 	/* Event and signal handlers */
 63 b0a6bcf7 2022-09-13 op 	struct event			 ps_evsigint;
 64 b0a6bcf7 2022-09-13 op 	struct event			 ps_evsigterm;
 65 b0a6bcf7 2022-09-13 op 	struct event			 ps_evsigchld;
 66 b0a6bcf7 2022-09-13 op 	struct event			 ps_evsighup;
 67 b0a6bcf7 2022-09-13 op 
 68 b0a6bcf7 2022-09-13 op 	void				*ps_env;
 69 b0a6bcf7 2022-09-13 op };
 70 b0a6bcf7 2022-09-13 op 
 71 b0a6bcf7 2022-09-13 op struct privsep_proc {
 72 b0a6bcf7 2022-09-13 op 	const char		*p_title;
 73 b0a6bcf7 2022-09-13 op 	enum privsep_procid	 p_id;
 74 b0a6bcf7 2022-09-13 op 	int			(*p_cb)(int, struct privsep_proc *,
 75 b0a6bcf7 2022-09-13 op 				    struct imsg *);
 76 b0a6bcf7 2022-09-13 op 	void			(*p_init)(struct privsep *,
 77 b0a6bcf7 2022-09-13 op 				    struct privsep_proc *);
 78 b0a6bcf7 2022-09-13 op 	void			(*p_shutdown)(void);
 79 b0a6bcf7 2022-09-13 op 	const char		*p_chroot;
 80 b0a6bcf7 2022-09-13 op 	struct passwd		*p_pw;
 81 b0a6bcf7 2022-09-13 op 	struct privsep		*p_ps;
 82 b0a6bcf7 2022-09-13 op };
 83 b0a6bcf7 2022-09-13 op 
 84 b0a6bcf7 2022-09-13 op struct privsep_fd {
 85 b0a6bcf7 2022-09-13 op 	enum privsep_procid		 pf_procid;
 86 b0a6bcf7 2022-09-13 op 	unsigned int			 pf_instance;
 87 b0a6bcf7 2022-09-13 op };
 88 b0a6bcf7 2022-09-13 op 
 89 b0a6bcf7 2022-09-13 op /* proc.c */
 90 b0a6bcf7 2022-09-13 op void	 proc_init(struct privsep *, struct privsep_proc *, unsigned int,
 91 b0a6bcf7 2022-09-13 op 	    int, int, char **, enum privsep_procid);
 92 b0a6bcf7 2022-09-13 op void	 proc_kill(struct privsep *);
 93 b0a6bcf7 2022-09-13 op void	 proc_connect(struct privsep *ps);
 94 b0a6bcf7 2022-09-13 op void	 proc_dispatch(int, short event, void *);
 95 b0a6bcf7 2022-09-13 op void	 proc_range(struct privsep *, enum privsep_procid, int *, int *);
 96 b0a6bcf7 2022-09-13 op void	 proc_run(struct privsep *, struct privsep_proc *,
 97 b0a6bcf7 2022-09-13 op 	    struct privsep_proc *, unsigned int,
 98 b0a6bcf7 2022-09-13 op 	    void (*)(struct privsep *, struct privsep_proc *, void *), void *);
 99 b0a6bcf7 2022-09-13 op void	 imsg_event_add(struct imsgev *);
100 b0a6bcf7 2022-09-13 op int	 imsg_compose_event(struct imsgev *, uint16_t, uint32_t,
101 b0a6bcf7 2022-09-13 op 	    pid_t, int, void *, uint16_t);
102 b0a6bcf7 2022-09-13 op int	 imsg_composev_event(struct imsgev *, uint16_t, uint32_t,
103 b0a6bcf7 2022-09-13 op 	    pid_t, int, const struct iovec *, int);
104 b0a6bcf7 2022-09-13 op int	 proc_compose_imsg(struct privsep *, enum privsep_procid, int,
105 b0a6bcf7 2022-09-13 op 	    uint16_t, uint32_t, int, void *, uint16_t);
106 b0a6bcf7 2022-09-13 op int	 proc_compose(struct privsep *, enum privsep_procid,
107 b0a6bcf7 2022-09-13 op 	    uint16_t, void *data, uint16_t);
108 b0a6bcf7 2022-09-13 op int	 proc_composev_imsg(struct privsep *, enum privsep_procid, int,
109 b0a6bcf7 2022-09-13 op 	    uint16_t, uint32_t, int, const struct iovec *, int);
110 b0a6bcf7 2022-09-13 op int	 proc_composev(struct privsep *, enum privsep_procid,
111 b0a6bcf7 2022-09-13 op 	    uint16_t, const struct iovec *, int);
112 b0a6bcf7 2022-09-13 op int	 proc_forward_imsg(struct privsep *, struct imsg *,
113 b0a6bcf7 2022-09-13 op 	    enum privsep_procid, int);
114 b0a6bcf7 2022-09-13 op struct imsgbuf *
115 b0a6bcf7 2022-09-13 op 	 proc_ibuf(struct privsep *, enum privsep_procid, int);
116 b0a6bcf7 2022-09-13 op struct imsgev *
117 b0a6bcf7 2022-09-13 op 	 proc_iev(struct privsep *, enum privsep_procid, int);
118 b0a6bcf7 2022-09-13 op enum privsep_procid
119 b0a6bcf7 2022-09-13 op 	 proc_getid(struct privsep_proc *, unsigned int, const char *);
120 b0a6bcf7 2022-09-13 op int	 proc_flush_imsg(struct privsep *, enum privsep_procid, int);