// SPDX-License-Identifier: GPL-2.0-or-later /* Virtual terminal [aka TeletYpe] interface routine * Copyright (C) 1997 Kunihiro Ishiguro */ #ifndef _ZEBRA_VTY_H #define _ZEBRA_VTY_H #include #ifdef HAVE_LIBPCRE2_POSIX #ifndef _FRR_PCRE2_POSIX #define _FRR_PCRE2_POSIX #include #endif /* _FRR_PCRE2_POSIX */ #elif defined(HAVE_LIBPCREPOSIX) #include #else #include #endif /* HAVE_LIBPCRE2_POSIX */ #include "frrevent.h" #include "log.h" #include "sockunion.h" #include "qobj.h" #include "compiler.h" #include "northbound.h" #include "zlog_live.h" #include "libfrr.h" #include "mgmt_fe_client.h" #ifdef __cplusplus extern "C" { #endif struct json_object; #define VTY_BUFSIZ 4096 #define VTY_MAXHIST 20 #define VTY_MAXDEPTH 8 #define VTY_MAXCFGCHANGES 16 struct vty_error { char error_buf[VTY_BUFSIZ]; uint32_t line_num; int cmd_ret; }; struct vty_cfg_change { char xpath[XPATH_MAXLEN]; enum nb_operation operation; const char *value; }; PREDECL_DLIST(vtys); /* VTY struct. */ struct vty { struct vtys_item itm; /* File descripter of this vty. */ int fd; /* output FD, to support stdin/stdout combination */ int wfd; /* File output, used for VTYSH only */ FILE *of; FILE *of_saved; /* whether we are using pager or not */ bool is_paged; /* Is this vty connect to file or not */ enum { VTY_TERM, /* telnet conn or stdin/stdout UI */ VTY_FILE, /* reading and writing config files */ VTY_SHELL, /* vtysh client side UI */ VTY_SHELL_SERV, /* server-side vtysh connection */ } type; /* Node status of this vty */ int node; /* Failure count */ int fail; /* Output filer regex */ bool filter; regex_t include; /* Line buffer */ struct buffer *lbuf; /* Output buffer. */ struct buffer *obuf; /* Command input buffer */ char *buf; /* Command input error buffer */ struct list *error; /* Command cursor point */ int cp; /* Command length */ int length; /* Command max length. */ int max; /* Histry of command */ char *hist[VTY_MAXHIST]; /* History lookup current point */ int hp; /* History insert end point */ int hindex; /* Changes enqueued to be applied in the candidate configuration. */ size_t num_cfg_changes; struct nb_cfg_change cfg_changes[VTY_MAXCFGCHANGES]; /* XPath of the current node */ int xpath_index; char xpath[VTY_MAXDEPTH][XPATH_MAXLEN]; /* * Keep track of how many SET_CFG requests has been sent so far that * has not been committed yet. */ size_t mgmt_num_pending_setcfg; /* In configure mode. */ bool config; /* Private candidate configuration mode. */ bool private_config; /* Candidate configuration. */ struct nb_config *candidate_config; /* Base candidate configuration. */ struct nb_config *candidate_config_base; /* Dynamic transaction information. */ bool pending_allowed; bool pending_commit; char *pending_cmds_buf; size_t pending_cmds_buflen; size_t pending_cmds_bufpos; /* Confirmed-commit timeout and rollback configuration. */ struct event *t_confirmed_commit_timeout; struct nb_config *confirmed_commit_rollback; /* qobj object ID (replacement for "index") */ uint64_t qobj_index; /* qobj second-level object ID (replacement for "index_sub") */ uint64_t qobj_index_sub; /* For escape character. */ unsigned char escape; /* Current vty status. */ enum { VTY_NORMAL, VTY_CLOSE, VTY_MORE, VTY_MORELINE, VTY_PASSFD, } status; /* vtysh socket/fd passing (for terminal monitor) */ int pass_fd; /* CLI command return value (likely CMD_SUCCESS) when pass_fd != -1 */ uint8_t pass_fd_status[4]; /* live logging target / terminal monitor */ struct zlog_live_cfg live_log; /* IAC handling: was the last character received the IAC (interpret-as-command) escape character (and therefore the next character will be the command code)? Refer to Telnet RFC 854. */ unsigned char iac; /* IAC SB (option subnegotiation) handling */ unsigned char iac_sb_in_progress; /* At the moment, we care only about the NAWS (window size) negotiation, and that requires just a 5-character buffer (RFC 1073): <16-bit width> <16-bit height> */ #define TELNET_NAWS_SB_LEN 5 unsigned char sb_buf[TELNET_NAWS_SB_LEN]; /* How many subnegotiation characters have we received? We just drop those that do not fit in the buffer. */ size_t sb_len; /* Window width/height. */ int width; int height; /* Configure lines. */ int lines; /* Read and write thread. */ struct event *t_read; struct event *t_write; /* Timeout seconds and thread. */ unsigned long v_timeout; struct event *t_timeout; /* What address is this vty comming from. */ char address[SU_ADDRSTRLEN]; /* "frame" output. This is buffered and will be printed if some * actual output follows, or will be discarded if the frame ends * without any output. */ size_t frame_pos; char frame[1024]; uint64_t mgmt_session_id; /* FE adapter identifies session w/ this */ uint64_t mgmt_client_id; /* FE vty client identifies w/ this ID */ uint64_t mgmt_req_id; /* set when we have sent mgmtd a *REQ command in response to some vty * CLI command and we are waiting on the reply so we can respond to the * vty user. */ const char *mgmt_req_pending_cmd; uintptr_t mgmt_req_pending_data; bool mgmt_locked_candidate_ds; bool mgmt_locked_running_ds; }; static inline void vty_push_context(struct vty *vty, int node, uint64_t id) { vty->node = node; vty->qobj_index = id; } /* note: VTY_PUSH_CONTEXT(..., NULL) doesn't work, since it will try to * dereference "NULL->qobj_node.nid" */ #define VTY_PUSH_CONTEXT(nodeval, ptr) \ vty_push_context(vty, nodeval, QOBJ_ID_0SAFE(ptr)) #define VTY_PUSH_CONTEXT_NULL(nodeval) vty_push_context(vty, nodeval, 0ULL) #define VTY_PUSH_CONTEXT_SUB(nodeval, ptr) \ do { \ vty->node = nodeval; \ /* qobj_index stays untouched */ \ vty->qobj_index_sub = QOBJ_ID_0SAFE(ptr); \ } while (0) /* can return NULL if context is invalid! */ #define VTY_GET_CONTEXT(structname) \ QOBJ_GET_TYPESAFE(vty->qobj_index, structname) #define VTY_GET_CONTEXT_SUB(structname) \ QOBJ_GET_TYPESAFE(vty->qobj_index_sub, structname) /* will return if ptr is NULL. */ #define VTY_CHECK_CONTEXT(ptr) \ if (!ptr) { \ vty_out(vty, \ "Current configuration object was deleted " \ "by another process.\n"); \ return CMD_WARNING; \ } /* struct structname *ptr = ; ptr will never be NULL. */ #define VTY_DECLVAR_CONTEXT(structname, ptr) \ struct structname *ptr = VTY_GET_CONTEXT(structname); \ VTY_CHECK_CONTEXT(ptr); #define VTY_DECLVAR_CONTEXT_SUB(structname, ptr) \ struct structname *ptr = VTY_GET_CONTEXT_SUB(structname); \ VTY_CHECK_CONTEXT(ptr); #define VTY_DECLVAR_INSTANCE_CONTEXT(structname, ptr) \ if (vty->qobj_index == 0) \ return CMD_NOT_MY_INSTANCE; \ struct structname *ptr = VTY_GET_CONTEXT(structname); \ VTY_CHECK_CONTEXT(ptr); #define VTY_DECLVAR_CONTEXT_VRF(vrfptr) \ struct vrf *vrfptr; \ if (vty->node == CONFIG_NODE) \ vrfptr = vrf_lookup_by_id(VRF_DEFAULT); \ else \ vrfptr = VTY_GET_CONTEXT(vrf); \ VTY_CHECK_CONTEXT(vrfptr); \ MACRO_REQUIRE_SEMICOLON() /* end */ /* XPath macros. */ #define VTY_PUSH_XPATH(nodeval, value) \ do { \ if (vty->xpath_index >= VTY_MAXDEPTH) { \ vty_out(vty, "%% Reached maximum CLI depth (%u)\n", \ VTY_MAXDEPTH); \ return CMD_WARNING; \ } \ vty->node = nodeval; \ strlcpy(vty->xpath[vty->xpath_index], value, \ sizeof(vty->xpath[0])); \ vty->xpath_index++; \ } while (0) #define VTY_CURR_XPATH vty->xpath[vty->xpath_index - 1] #define VTY_CHECK_XPATH \ do { \ if (vty->type != VTY_FILE && !vty->private_config && \ vty->xpath_index > 0 && \ !yang_dnode_exists(vty->candidate_config->dnode, \ VTY_CURR_XPATH)) { \ vty_out(vty, \ "Current configuration object was deleted " \ "by another process.\n\n"); \ return CMD_WARNING; \ } \ } while (0) struct vty_arg { const char *name; const char *value; const char **argv; int argc; }; /* Integrated configuration file. */ #define INTEGRATE_DEFAULT_CONFIG "frr.conf" /* Default time out value */ #define VTY_TIMEOUT_DEFAULT 600 /* Vty read buffer size. */ #define VTY_READ_BUFSIZ 512 /* Directory separator. */ #ifndef DIRECTORY_SEP #define DIRECTORY_SEP '/' #endif /* DIRECTORY_SEP */ #ifndef IS_DIRECTORY_SEP #define IS_DIRECTORY_SEP(c) ((c) == DIRECTORY_SEP) #endif extern struct nb_config *vty_mgmt_candidate_config; extern bool vty_log_commands; extern char const *const mgmt_daemons[]; extern uint mgmt_daemons_count; /* Prototypes. */ extern void vty_init(struct event_loop *m, bool do_command_logging); extern void vty_init_vtysh(void); extern void vty_terminate(void); extern void vty_reset(void); extern struct vty *vty_new(void); extern struct vty *vty_stdio(void (*atclose)(int isexit)); /* - vty_frame() output goes to a buffer (for context-begin markers) * - vty_out() will first print this buffer, and clear it * - vty_endframe() clears the buffer without printing it, and prints an * extra string if the buffer was empty before (for context-end markers) */ extern int vty_out(struct vty *, const char *, ...) PRINTFRR(2, 3); extern void vty_frame(struct vty *, const char *, ...) PRINTFRR(2, 3); extern void vty_endframe(struct vty *, const char *); extern bool vty_set_include(struct vty *vty, const char *regexp); /* returns CMD_SUCCESS so you can do a one-line "return vty_json(...)" * NULL check and json_object_free() is included. * * _no_pretty means do not add a bunch of newlines and dump the output * as densely as possible. */ extern int vty_json(struct vty *vty, struct json_object *json); extern int vty_json_no_pretty(struct vty *vty, struct json_object *json); extern void vty_json_empty(struct vty *vty, struct json_object *json); /* post fd to be passed to the vtysh client * fd is owned by the VTY code after this and will be closed when done */ extern void vty_pass_fd(struct vty *vty, int fd); extern FILE *vty_open_config(const char *config_file, char *config_default_dir); extern bool vty_read_config(struct nb_config *config, const char *config_file, char *config_default_dir); extern void vty_read_file(struct nb_config *config, FILE *confp); extern void vty_read_file_finish(struct vty *vty, struct nb_config *config); extern void vty_time_print(struct vty *, int); extern void vty_serv_start(const char *, unsigned short, const char *); extern void vty_serv_stop(void); extern void vty_close(struct vty *); extern char *vty_get_cwd(void); extern void vty_update_xpath(const char *oldpath, const char *newpath); extern int vty_config_enter(struct vty *vty, bool private_config, bool exclusive, bool file_lock); extern void vty_config_exit(struct vty *); extern int vty_config_node_exit(struct vty *); extern int vty_shell(struct vty *); extern int vty_shell_serv(struct vty *); extern void vty_hello(struct vty *); /* ^Z / SIGTSTP handling */ extern void vty_stdio_suspend(void); extern void vty_stdio_resume(void); extern void vty_stdio_close(void); extern void vty_init_mgmt_fe(void); extern bool vty_mgmt_fe_enabled(void); extern bool vty_mgmt_should_process_cli_apply_changes(struct vty *vty); extern bool mgmt_vty_read_configs(void); extern int vty_mgmt_send_config_data(struct vty *vty, const char *xpath_base, bool implicit_commit); extern int vty_mgmt_send_commit_config(struct vty *vty, bool validate_only, bool abort); extern int vty_mgmt_send_get_req(struct vty *vty, bool is_config, Mgmtd__DatastoreId datastore, const char **xpath_list, int num_req); extern int vty_mgmt_send_get_data_req(struct vty *vty, uint8_t datastore, LYD_FORMAT result_type, uint8_t flags, uint8_t defaults, const char *xpath); extern int vty_mgmt_send_lockds_req(struct vty *vty, Mgmtd__DatastoreId ds_id, bool lock, bool scok); extern void vty_mgmt_resume_response(struct vty *vty, int ret); static inline bool vty_needs_implicit_commit(struct vty *vty) { return frr_get_cli_mode() == FRR_CLI_CLASSIC && !vty->pending_allowed; } #ifdef __cplusplus } #endif #endif /* _ZEBRA_VTY_H */