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1 | // SPDX-License-Identifier: GPL-2.0-or-later | |
2 | /* | |
3 | * libfrr overall management functions | |
4 | * | |
5 | * Copyright (C) 2016 David Lamparter for NetDEF, Inc. | |
6 | */ | |
7 | ||
8 | #ifndef _ZEBRA_FRR_H | |
9 | #define _ZEBRA_FRR_H | |
10 | ||
11 | #include "typesafe.h" | |
12 | #include "sigevent.h" | |
13 | #include "privs.h" | |
14 | #include "frrevent.h" | |
15 | #include "log.h" | |
16 | #include "getopt.h" | |
17 | #include "module.h" | |
18 | #include "hook.h" | |
19 | #include "northbound.h" | |
20 | ||
21 | #ifdef __cplusplus | |
22 | extern "C" { | |
23 | #endif | |
24 | ||
25 | /* The following options disable specific command line options that | |
26 | * are not applicable for a particular daemon. | |
27 | */ | |
28 | #define FRR_NO_PRIVSEP (1 << 0) | |
29 | #define FRR_NO_TCPVTY (1 << 1) | |
30 | #define FRR_LIMITED_CLI (1 << 2) | |
31 | #define FRR_NO_SPLIT_CONFIG (1 << 3) | |
32 | #define FRR_NO_PID (1 << 4) | |
33 | #define FRR_NO_CFG_PID_DRY (FRR_NO_PID | FRR_NO_SPLIT_CONFIG) | |
34 | #define FRR_NO_ZCLIENT (1 << 5) | |
35 | /* If FRR_DETACH_LATER is used, the daemon will keep its parent running | |
36 | * until frr_detach() is called. Normally "somedaemon -d" returns once the | |
37 | * main event loop is reached in the daemon; use this for extra startup bits. | |
38 | * | |
39 | * Does nothing if -d isn't used. | |
40 | */ | |
41 | #define FRR_DETACH_LATER (1 << 6) | |
42 | /* If FRR_MANUAL_VTY_START is used, frr_run() will not automatically start | |
43 | * listening on for vty connection (either TCP or Unix socket based). The daemon | |
44 | * is responsible for calling frr_vty_serv() itself. | |
45 | */ | |
46 | #define FRR_MANUAL_VTY_START (1 << 7) | |
47 | ||
48 | PREDECL_DLIST(log_args); | |
49 | struct log_arg { | |
50 | struct log_args_item itm; | |
51 | ||
52 | char target[0]; | |
53 | }; | |
54 | DECLARE_DLIST(log_args, struct log_arg, itm); | |
55 | ||
56 | enum frr_cli_mode { | |
57 | FRR_CLI_CLASSIC = 0, | |
58 | FRR_CLI_TRANSACTIONAL, | |
59 | }; | |
60 | ||
61 | struct frr_daemon_info { | |
62 | unsigned flags; | |
63 | ||
64 | const char *progname; | |
65 | const char *name; | |
66 | const char *logname; | |
67 | unsigned short instance; | |
68 | struct frrmod_runtime *module; | |
69 | ||
70 | char *vty_addr; | |
71 | int vty_port; | |
72 | char *vty_sock_path; | |
73 | bool dryrun; | |
74 | bool daemon_mode; | |
75 | bool terminal; | |
76 | enum frr_cli_mode cli_mode; | |
77 | ||
78 | struct event *read_in; | |
79 | const char *config_file; | |
80 | const char *backup_config_file; | |
81 | const char *pid_file; | |
82 | #ifdef HAVE_SQLITE3 | |
83 | const char *db_file; | |
84 | #endif | |
85 | const char *vty_path; | |
86 | const char *module_path; | |
87 | const char *script_path; | |
88 | ||
89 | const char *pathspace; | |
90 | bool zpathspace; | |
91 | ||
92 | struct log_args_head early_logging[1]; | |
93 | const char *early_loglevel; | |
94 | ||
95 | const char *proghelp; | |
96 | void (*printhelp)(FILE *target); | |
97 | const char *copyright; | |
98 | char startinfo[128]; | |
99 | ||
100 | struct frr_signal_t *signals; | |
101 | size_t n_signals; | |
102 | ||
103 | struct zebra_privs_t *privs; | |
104 | ||
105 | const struct frr_yang_module_info *const *yang_modules; | |
106 | size_t n_yang_modules; | |
107 | ||
108 | bool log_always; | |
109 | ||
110 | /* Optional upper limit on the number of fds used in select/poll */ | |
111 | uint32_t limit_fds; | |
112 | }; | |
113 | ||
114 | /* execname is the daemon's executable (and pidfile and configfile) name, | |
115 | * i.e. "zebra" or "bgpd" | |
116 | * constname is the daemons source-level name, primarily for the logging ID, | |
117 | * i.e. "ZEBRA" or "BGP" | |
118 | * | |
119 | * note that this macro is also a latch-on point for other changes (e.g. | |
120 | * upcoming module support) that need to place some per-daemon things. Each | |
121 | * daemon should have one of these. | |
122 | */ | |
123 | #define FRR_DAEMON_INFO(execname, constname, ...) \ | |
124 | static struct frr_daemon_info execname##_di = {.name = #execname, \ | |
125 | .logname = #constname, \ | |
126 | .module = THIS_MODULE, \ | |
127 | __VA_ARGS__}; \ | |
128 | FRR_COREMOD_SETUP(.name = #execname, \ | |
129 | .description = #execname " daemon", \ | |
130 | .version = FRR_VERSION, ); \ | |
131 | MACRO_REQUIRE_SEMICOLON() /* end */ | |
132 | ||
133 | extern void frr_init_vtydir(void); | |
134 | extern void frr_preinit(struct frr_daemon_info *daemon, int argc, char **argv); | |
135 | extern void frr_opt_add(const char *optstr, const struct option *longopts, | |
136 | const char *helpstr); | |
137 | extern int frr_getopt(int argc, char *const argv[], int *longindex); | |
138 | ||
139 | extern __attribute__((__noreturn__)) void frr_help_exit(int status); | |
140 | ||
141 | extern struct event_loop *frr_init(void); | |
142 | extern const char *frr_get_progname(void); | |
143 | extern enum frr_cli_mode frr_get_cli_mode(void); | |
144 | extern uint32_t frr_get_fd_limit(void); | |
145 | extern bool frr_is_startup_fd(int fd); | |
146 | ||
147 | /* call order of these hooks is as ordered here */ | |
148 | DECLARE_HOOK(frr_early_init, (struct event_loop * tm), (tm)); | |
149 | DECLARE_HOOK(frr_late_init, (struct event_loop * tm), (tm)); | |
150 | /* fork() happens between late_init and config_pre */ | |
151 | DECLARE_HOOK(frr_config_pre, (struct event_loop * tm), (tm)); | |
152 | DECLARE_HOOK(frr_config_post, (struct event_loop * tm), (tm)); | |
153 | ||
154 | extern void frr_config_fork(void); | |
155 | ||
156 | extern void frr_run(struct event_loop *master); | |
157 | extern void frr_detach(void); | |
158 | extern void frr_vty_serv_start(void); | |
159 | extern void frr_vty_serv_stop(void); | |
160 | ||
161 | extern bool frr_zclient_addr(struct sockaddr_storage *sa, socklen_t *sa_len, | |
162 | const char *path); | |
163 | ||
164 | /* these two are before the protocol daemon does its own shutdown | |
165 | * it's named this way being the counterpart to frr_late_init */ | |
166 | DECLARE_KOOH(frr_early_fini, (), ()); | |
167 | extern void frr_early_fini(void); | |
168 | /* and these two are after the daemon did its own cleanup */ | |
169 | DECLARE_KOOH(frr_fini, (), ()); | |
170 | extern void frr_fini(void); | |
171 | ||
172 | extern char config_default[512]; | |
173 | extern char frr_zclientpath[256]; | |
174 | extern const char frr_sysconfdir[]; | |
175 | extern char frr_vtydir[256]; | |
176 | extern const char frr_moduledir[]; | |
177 | extern const char frr_scriptdir[]; | |
178 | ||
179 | extern char frr_protoname[]; | |
180 | extern char frr_protonameinst[]; | |
181 | /* always set in the spot where we *would* fork even if we don't do so */ | |
182 | extern bool frr_is_after_fork; | |
183 | ||
184 | extern bool debug_memstats_at_exit; | |
185 | ||
186 | #ifdef __cplusplus | |
187 | } | |
188 | #endif | |
189 | ||
190 | #endif /* _ZEBRA_FRR_H */ |