/* $OpenBSD: proc.h,v 1.24 2024/02/20 21:40:37 dv Exp $ */ /* * Copyright (c) 2010-2015 Reyk Floeter * * 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 #include #include #include #include #ifndef _PROC_H #define _PROC_H enum { IMSG_NONE, IMSG_CTL_OK, IMSG_CTL_FAIL, IMSG_CTL_VERBOSE, IMSG_CTL_END, IMSG_CTL_RESET, IMSG_CTL_PROCFD, IMSG_PROC_MAX }; /* imsg */ struct imsgev { struct imsgbuf ibuf; void (*handler)(int, short, void *); struct event ev; struct privsep_proc *proc; void *data; short events; }; #define IMSG_SIZE_CHECK(imsg, p) do { \ if (IMSG_DATA_SIZE(imsg) < sizeof(*p)) \ fatalx("bad length imsg received (%s)", #p); \ } while (0) #define IMSG_DATA_SIZE(imsg) ((imsg)->hdr.len - IMSG_HEADER_SIZE) /* control socket */ struct control_sock { const char *cs_name; struct event cs_ev; struct event cs_evt; int cs_fd; int cs_restricted; void *cs_env; uid_t cs_uid; gid_t cs_gid; TAILQ_ENTRY(control_sock) cs_entry; }; TAILQ_HEAD(control_socks, control_sock); struct ctl_conn { TAILQ_ENTRY(ctl_conn) entry; struct imsgev iev; struct sockpeercred peercred; }; TAILQ_HEAD(ctl_connlist, ctl_conn); /* privsep */ enum privsep_procid { PROC_PARENT = 0, PROC_CONTROL, PROC_AGENTX, PROC_VMM, PROC_PRIV, PROC_MAX, }; extern enum privsep_procid privsep_process; #define CONFIG_RELOAD 0x00 #define CONFIG_VMS 0x01 #define CONFIG_SWITCHES 0x02 #define CONFIG_ALL 0xff struct privsep_pipes { int *pp_pipes[PROC_MAX]; }; struct privsep { struct privsep_pipes *ps_pipes[PROC_MAX]; struct privsep_pipes *ps_pp; struct imsgev *ps_ievs[PROC_MAX]; const char *ps_title[PROC_MAX]; uint8_t ps_what[PROC_MAX]; struct passwd *ps_pw; int ps_noaction; struct control_sock ps_csock; struct control_socks ps_rcsocks; unsigned int ps_instances[PROC_MAX]; unsigned int ps_instance; /* Event and signal handlers */ struct event ps_evsigint; struct event ps_evsigterm; struct event ps_evsigchld; struct event ps_evsighup; struct event ps_evsigpipe; struct event ps_evsigusr1; void *ps_env; }; struct privsep_proc { const char *p_title; enum privsep_procid p_id; int (*p_cb)(int, struct privsep_proc *, struct imsg *); void (*p_init)(struct privsep *, struct privsep_proc *); void (*p_shutdown)(void); const char *p_chroot; struct passwd *p_pw; struct privsep *p_ps; }; struct privsep_fd { enum privsep_procid pf_procid; unsigned int pf_instance; }; #if DEBUG #define DPRINTF log_debug #else #define DPRINTF(x...) do {} while(0) #endif #define PROC_PARENT_SOCK_FILENO 3 #define PROC_MAX_INSTANCES 32 /* proc.c */ void proc_init(struct privsep *, struct privsep_proc *, unsigned int, int, int, char **, enum privsep_procid); void proc_kill(struct privsep *); void proc_connect(struct privsep *ps); void proc_dispatch(int, short event, void *); void proc_run(struct privsep *, struct privsep_proc *, struct privsep_proc *, unsigned int, void (*)(struct privsep *, struct privsep_proc *, void *), void *); void imsg_event_add(struct imsgev *); void imsg_event_add2(struct imsgev *, struct event_base *); int imsg_compose_event(struct imsgev *, uint16_t, uint32_t, pid_t, int, void *, uint16_t); int imsg_compose_event2(struct imsgev *, uint16_t, uint32_t, pid_t, int, void *, uint16_t, struct event_base *); int imsg_composev_event(struct imsgev *, uint16_t, uint32_t, pid_t, int, const struct iovec *, int); int proc_compose_imsg(struct privsep *, enum privsep_procid, int, uint16_t, uint32_t, int, void *, uint16_t); int proc_compose(struct privsep *, enum privsep_procid, uint16_t, void *data, uint16_t); int proc_composev_imsg(struct privsep *, enum privsep_procid, int, uint16_t, uint32_t, int, const struct iovec *, int); int proc_composev(struct privsep *, enum privsep_procid, uint16_t, const struct iovec *, int); int proc_forward_imsg(struct privsep *, struct imsg *, enum privsep_procid, int); struct imsgbuf * proc_ibuf(struct privsep *, enum privsep_procid, int); struct imsgev * proc_iev(struct privsep *, enum privsep_procid, int); enum privsep_procid proc_getid(struct privsep_proc *, unsigned int, const char *); int proc_flush_imsg(struct privsep *, enum privsep_procid, int); /* control.c */ void control(struct privsep *, struct privsep_proc *); int control_init(struct privsep *, struct control_sock *); int control_reset(struct control_sock *); int control_listen(struct control_sock *); /* log.c */ void log_init(int, int); void log_procinit(const char *, ...); void log_setverbose(int); int log_getverbose(void); void log_warn(const char *, ...) __attribute__((__format__ (printf, 1, 2))); void log_warnx(const char *, ...) __attribute__((__format__ (printf, 1, 2))); void log_info(const char *, ...) __attribute__((__format__ (printf, 1, 2))); void log_debug(const char *, ...) __attribute__((__format__ (printf, 1, 2))); void logit(int, const char *, ...) __attribute__((__format__ (printf, 2, 3))); void vlog(int, const char *, va_list) __attribute__((__format__ (printf, 2, 0))); __dead void fatal(const char *, ...) __attribute__((__format__ (printf, 1, 2))); __dead void fatalx(const char *, ...) __attribute__((__format__ (printf, 1, 2))); #endif /* _PROC_H */