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|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Virtual terminal [aka TeletYpe] interface routine.
* Copyright (C) 1997, 98 Kunihiro Ishiguro
*/
#include <zebra.h>
#include <lib/version.h>
#include <sys/types.h>
#include <sys/types.h>
#ifdef HAVE_LIBPCRE2_POSIX
#ifndef _FRR_PCRE2_POSIX
#define _FRR_PCRE2_POSIX
#include <pcre2posix.h>
#endif /* _FRR_PCRE2_POSIX */
#elif defined(HAVE_LIBPCREPOSIX)
#include <pcreposix.h>
#else
#include <regex.h>
#endif /* HAVE_LIBPCRE2_POSIX */
#include <stdio.h>
#include "linklist.h"
#include "event.h"
#include "buffer.h"
#include "command.h"
#include "sockunion.h"
#include "memory.h"
#include "log.h"
#include "prefix.h"
#include "filter.h"
#include "vty.h"
#include "privs.h"
#include "network.h"
#include "libfrr.h"
#include "frrstr.h"
#include "lib_errors.h"
#include "northbound_cli.h"
#include "printfrr.h"
#include "json.h"
#include <arpa/telnet.h>
#include <termios.h>
#include "lib/vty_clippy.c"
DEFINE_MTYPE_STATIC(LIB, VTY, "VTY");
DEFINE_MTYPE_STATIC(LIB, VTY_SERV, "VTY server");
DEFINE_MTYPE_STATIC(LIB, VTY_OUT_BUF, "VTY output buffer");
DEFINE_MTYPE_STATIC(LIB, VTY_HIST, "VTY history");
DECLARE_DLIST(vtys, struct vty, itm);
/* Vty events */
enum vty_event {
VTY_SERV,
VTY_READ,
VTY_WRITE,
VTY_TIMEOUT_RESET,
#ifdef VTYSH
VTYSH_SERV,
VTYSH_READ,
VTYSH_WRITE
#endif /* VTYSH */
};
struct nb_config *vty_mgmt_candidate_config;
static uintptr_t mgmt_lib_hndl;
static bool mgmt_fe_connected;
static bool mgmt_candidate_ds_wr_locked;
static uint64_t mgmt_client_id_next;
static uint64_t mgmt_last_req_id = UINT64_MAX;
PREDECL_DLIST(vtyservs);
struct vty_serv {
struct vtyservs_item itm;
int sock;
bool vtysh;
struct event *t_accept;
};
DECLARE_DLIST(vtyservs, struct vty_serv, itm);
static void vty_event_serv(enum vty_event event, struct vty_serv *);
static void vty_event(enum vty_event, struct vty *);
static int vtysh_flush(struct vty *vty);
/* Extern host structure from command.c */
extern struct host host;
/* active listeners */
static struct vtyservs_head vty_servs[1] = {INIT_DLIST(vty_servs[0])};
/* active connections */
static struct vtys_head vty_sessions[1] = {INIT_DLIST(vty_sessions[0])};
static struct vtys_head vtysh_sessions[1] = {INIT_DLIST(vtysh_sessions[0])};
/* Vty timeout value. */
static unsigned long vty_timeout_val = VTY_TIMEOUT_DEFAULT;
/* Vty access-class command */
static char *vty_accesslist_name = NULL;
/* Vty access-calss for IPv6. */
static char *vty_ipv6_accesslist_name = NULL;
/* Current directory. */
static char vty_cwd[MAXPATHLEN];
/* Login password check. */
static int no_password_check = 0;
/* Integrated configuration file path */
static char integrate_default[] = SYSCONFDIR INTEGRATE_DEFAULT_CONFIG;
static bool do_log_commands;
static bool do_log_commands_perm;
void vty_mgmt_resume_response(struct vty *vty, bool success)
{
uint8_t header[4] = {0, 0, 0, 0};
int ret = CMD_SUCCESS;
if (!vty->mgmt_req_pending) {
zlog_err(
"vty response called without setting mgmt_req_pending");
return;
}
if (!success)
ret = CMD_WARNING_CONFIG_FAILED;
vty->mgmt_req_pending = false;
header[3] = ret;
buffer_put(vty->obuf, header, 4);
if (!vty->t_write && (vtysh_flush(vty) < 0))
/* Try to flush results; exit if a write
* error occurs.
*/
return;
if (vty->status == VTY_CLOSE)
vty_close(vty);
else
vty_event(VTYSH_READ, vty);
}
void vty_frame(struct vty *vty, const char *format, ...)
{
va_list args;
va_start(args, format);
vsnprintfrr(vty->frame + vty->frame_pos,
sizeof(vty->frame) - vty->frame_pos, format, args);
vty->frame_pos = strlen(vty->frame);
va_end(args);
}
void vty_endframe(struct vty *vty, const char *endtext)
{
if (vty->frame_pos == 0 && endtext)
vty_out(vty, "%s", endtext);
vty->frame_pos = 0;
}
bool vty_set_include(struct vty *vty, const char *regexp)
{
int errcode;
bool ret = true;
char errbuf[256];
if (!regexp) {
if (vty->filter) {
regfree(&vty->include);
vty->filter = false;
}
return true;
}
errcode = regcomp(&vty->include, regexp,
REG_EXTENDED | REG_NEWLINE | REG_NOSUB);
if (errcode) {
ret = false;
regerror(errcode, &vty->include, errbuf, sizeof(errbuf));
vty_out(vty, "%% Regex compilation error: %s\n", errbuf);
} else {
vty->filter = true;
}
return ret;
}
/* VTY standard output function. */
int vty_out(struct vty *vty, const char *format, ...)
{
va_list args;
ssize_t len;
char buf[1024];
char *p = NULL;
char *filtered;
/* format string may contain %m, keep errno intact for printfrr */
int saved_errno = errno;
if (vty->frame_pos) {
vty->frame_pos = 0;
vty_out(vty, "%s", vty->frame);
}
va_start(args, format);
errno = saved_errno;
p = vasnprintfrr(MTYPE_VTY_OUT_BUF, buf, sizeof(buf), format, args);
va_end(args);
len = strlen(p);
/* filter buffer */
if (vty->filter) {
vector lines = frrstr_split_vec(p, "\n");
/* Place first value in the cache */
char *firstline = vector_slot(lines, 0);
buffer_put(vty->lbuf, (uint8_t *) firstline, strlen(firstline));
/* If our split returned more than one entry, time to filter */
if (vector_active(lines) > 1) {
/*
* returned string is MTYPE_TMP so it matches the MTYPE
* of everything else in the vector
*/
char *bstr = buffer_getstr(vty->lbuf);
buffer_reset(vty->lbuf);
XFREE(MTYPE_TMP, lines->index[0]);
vector_set_index(lines, 0, bstr);
frrstr_filter_vec(lines, &vty->include);
vector_compact(lines);
/*
* Consider the string "foo\n". If the regex is an empty string
* and the line ended with a newline, then the vector will look
* like:
*
* [0]: 'foo'
* [1]: ''
*
* If the regex isn't empty, the vector will look like:
*
* [0]: 'foo'
*
* In this case we'd like to preserve the newline, so we add
* the empty string [1] as in the first example.
*/
if (p[strlen(p) - 1] == '\n' && vector_active(lines) > 0
&& strlen(vector_slot(lines, vector_active(lines) - 1)))
vector_set(lines, XSTRDUP(MTYPE_TMP, ""));
filtered = frrstr_join_vec(lines, "\n");
}
else {
filtered = NULL;
}
frrstr_strvec_free(lines);
} else {
filtered = p;
}
if (!filtered)
goto done;
switch (vty->type) {
case VTY_TERM:
/* print with crlf replacement */
buffer_put_crlf(vty->obuf, (uint8_t *)filtered,
strlen(filtered));
break;
case VTY_SHELL:
if (vty->of) {
fprintf(vty->of, "%s", filtered);
fflush(vty->of);
} else if (vty->of_saved) {
fprintf(vty->of_saved, "%s", filtered);
fflush(vty->of_saved);
}
break;
case VTY_SHELL_SERV:
case VTY_FILE:
default:
/* print without crlf replacement */
buffer_put(vty->obuf, (uint8_t *)filtered, strlen(filtered));
break;
}
done:
if (vty->filter && filtered)
XFREE(MTYPE_TMP, filtered);
/* If p is not different with buf, it is allocated buffer. */
if (p != buf)
XFREE(MTYPE_VTY_OUT_BUF, p);
return len;
}
static int vty_json_helper(struct vty *vty, struct json_object *json,
uint32_t options)
{
const char *text;
if (!json)
return CMD_SUCCESS;
text = json_object_to_json_string_ext(
json, options);
vty_out(vty, "%s\n", text);
json_object_free(json);
return CMD_SUCCESS;
}
int vty_json(struct vty *vty, struct json_object *json)
{
return vty_json_helper(vty, json,
JSON_C_TO_STRING_PRETTY |
JSON_C_TO_STRING_NOSLASHESCAPE);
}
int vty_json_no_pretty(struct vty *vty, struct json_object *json)
{
return vty_json_helper(vty, json, JSON_C_TO_STRING_NOSLASHESCAPE);
}
void vty_json_empty(struct vty *vty)
{
json_object *json = json_object_new_object();
vty_json(vty, json);
}
/* Output current time to the vty. */
void vty_time_print(struct vty *vty, int cr)
{
char buf[FRR_TIMESTAMP_LEN];
if (frr_timestamp(0, buf, sizeof(buf)) == 0) {
zlog_info("frr_timestamp error");
return;
}
if (cr)
vty_out(vty, "%s\n", buf);
else
vty_out(vty, "%s ", buf);
return;
}
/* Say hello to vty interface. */
void vty_hello(struct vty *vty)
{
if (host.motdfile) {
FILE *f;
char buf[4096];
f = fopen(host.motdfile, "r");
if (f) {
while (fgets(buf, sizeof(buf), f)) {
char *s;
/* work backwards to ignore trailling isspace()
*/
for (s = buf + strlen(buf);
(s > buf) && isspace((unsigned char)s[-1]);
s--)
;
*s = '\0';
vty_out(vty, "%s\n", buf);
}
fclose(f);
} else
vty_out(vty, "MOTD file not found\n");
} else if (host.motd)
vty_out(vty, "%s", host.motd);
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
/* prompt formatting has a %s in the cmd_node prompt string.
*
* Also for some reason GCC emits the warning on the end of the function
* (optimization maybe?) rather than on the vty_out line, so this pragma
* wraps the entire function rather than just the vty_out line.
*/
/* Put out prompt and wait input from user. */
static void vty_prompt(struct vty *vty)
{
if (vty->type == VTY_TERM) {
vty_out(vty, cmd_prompt(vty->node), cmd_hostname_get());
}
}
#pragma GCC diagnostic pop
/* Send WILL TELOPT_ECHO to remote server. */
static void vty_will_echo(struct vty *vty)
{
unsigned char cmd[] = {IAC, WILL, TELOPT_ECHO, '\0'};
vty_out(vty, "%s", cmd);
}
/* Make suppress Go-Ahead telnet option. */
static void vty_will_suppress_go_ahead(struct vty *vty)
{
unsigned char cmd[] = {IAC, WILL, TELOPT_SGA, '\0'};
vty_out(vty, "%s", cmd);
}
/* Make don't use linemode over telnet. */
static void vty_dont_linemode(struct vty *vty)
{
unsigned char cmd[] = {IAC, DONT, TELOPT_LINEMODE, '\0'};
vty_out(vty, "%s", cmd);
}
/* Use window size. */
static void vty_do_window_size(struct vty *vty)
{
unsigned char cmd[] = {IAC, DO, TELOPT_NAWS, '\0'};
vty_out(vty, "%s", cmd);
}
/* Authentication of vty */
static void vty_auth(struct vty *vty, char *buf)
{
char *passwd = NULL;
enum node_type next_node = 0;
int fail;
switch (vty->node) {
case AUTH_NODE:
if (host.encrypt)
passwd = host.password_encrypt;
else
passwd = host.password;
if (host.advanced)
next_node = host.enable ? VIEW_NODE : ENABLE_NODE;
else
next_node = VIEW_NODE;
break;
case AUTH_ENABLE_NODE:
if (host.encrypt)
passwd = host.enable_encrypt;
else
passwd = host.enable;
next_node = ENABLE_NODE;
break;
}
if (passwd) {
if (host.encrypt)
fail = strcmp(crypt(buf, passwd), passwd);
else
fail = strcmp(buf, passwd);
} else
fail = 1;
if (!fail) {
vty->fail = 0;
vty->node = next_node; /* Success ! */
} else {
vty->fail++;
if (vty->fail >= 3) {
if (vty->node == AUTH_NODE) {
vty_out(vty,
"%% Bad passwords, too many failures!\n");
vty->status = VTY_CLOSE;
} else {
/* AUTH_ENABLE_NODE */
vty->fail = 0;
vty_out(vty,
"%% Bad enable passwords, too many failures!\n");
vty->status = VTY_CLOSE;
}
}
}
}
/* Command execution over the vty interface. */
static int vty_command(struct vty *vty, char *buf)
{
int ret;
const char *protocolname;
char *cp = NULL;
assert(vty);
/*
* Log non empty command lines
*/
if (do_log_commands &&
strncmp(buf, "echo PING", strlen("echo PING")) != 0)
cp = buf;
if (cp != NULL) {
/* Skip white spaces. */
while (isspace((unsigned char)*cp) && *cp != '\0')
cp++;
}
if (cp != NULL && *cp != '\0') {
char vty_str[VTY_BUFSIZ];
char prompt_str[VTY_BUFSIZ];
/* format the base vty info */
snprintf(vty_str, sizeof(vty_str), "vty[%d]@%s", vty->fd,
vty->address);
/* format the prompt */
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
/* prompt formatting has a %s in the cmd_node prompt string */
snprintf(prompt_str, sizeof(prompt_str), cmd_prompt(vty->node),
vty_str);
#pragma GCC diagnostic pop
/* now log the command */
zlog_notice("%s%s", prompt_str, buf);
}
RUSAGE_T before;
RUSAGE_T after;
unsigned long walltime, cputime;
/* cmd_execute() may change cputime_enabled if we're executing the
* "service cputime-stats" command, which can result in nonsensical
* and very confusing warnings
*/
bool cputime_enabled_here = cputime_enabled;
GETRUSAGE(&before);
ret = cmd_execute(vty, buf, NULL, 0);
GETRUSAGE(&after);
walltime = thread_consumed_time(&after, &before, &cputime);
if (cputime_enabled_here && cputime_enabled && cputime_threshold
&& cputime > cputime_threshold)
/* Warn about CPU hog that must be fixed. */
flog_warn(EC_LIB_SLOW_THREAD_CPU,
"CPU HOG: command took %lums (cpu time %lums): %s",
walltime / 1000, cputime / 1000, buf);
else if (walltime_threshold && walltime > walltime_threshold)
flog_warn(EC_LIB_SLOW_THREAD_WALL,
"STARVATION: command took %lums (cpu time %lums): %s",
walltime / 1000, cputime / 1000, buf);
/* Get the name of the protocol if any */
protocolname = frr_protoname;
if (ret != CMD_SUCCESS)
switch (ret) {
case CMD_WARNING:
if (vty->type == VTY_FILE)
vty_out(vty, "Warning...\n");
break;
case CMD_ERR_AMBIGUOUS:
vty_out(vty, "%% Ambiguous command.\n");
break;
case CMD_ERR_NO_MATCH:
vty_out(vty, "%% [%s] Unknown command: %s\n",
protocolname, buf);
break;
case CMD_ERR_INCOMPLETE:
vty_out(vty, "%% Command incomplete.\n");
break;
}
return ret;
}
static const char telnet_backward_char = 0x08;
static const char telnet_space_char = ' ';
/* Basic function to write buffer to vty. */
static void vty_write(struct vty *vty, const char *buf, size_t nbytes)
{
if ((vty->node == AUTH_NODE) || (vty->node == AUTH_ENABLE_NODE))
return;
/* Should we do buffering here ? And make vty_flush (vty) ? */
buffer_put(vty->obuf, buf, nbytes);
}
/* Basic function to insert character into vty. */
static void vty_self_insert(struct vty *vty, char c)
{
int i;
int length;
if (vty->length + 1 >= VTY_BUFSIZ)
return;
length = vty->length - vty->cp;
memmove(&vty->buf[vty->cp + 1], &vty->buf[vty->cp], length);
vty->buf[vty->cp] = c;
vty_write(vty, &vty->buf[vty->cp], length + 1);
for (i = 0; i < length; i++)
vty_write(vty, &telnet_backward_char, 1);
vty->cp++;
vty->length++;
vty->buf[vty->length] = '\0';
}
/* Self insert character 'c' in overwrite mode. */
static void vty_self_insert_overwrite(struct vty *vty, char c)
{
if (vty->cp == vty->length) {
vty_self_insert(vty, c);
return;
}
vty->buf[vty->cp++] = c;
vty_write(vty, &c, 1);
}
/**
* Insert a string into vty->buf at the current cursor position.
*
* If the resultant string would be larger than VTY_BUFSIZ it is
* truncated to fit.
*/
static void vty_insert_word_overwrite(struct vty *vty, char *str)
{
if (vty->cp == VTY_BUFSIZ)
return;
size_t nwrite = MIN((int)strlen(str), VTY_BUFSIZ - vty->cp - 1);
memcpy(&vty->buf[vty->cp], str, nwrite);
vty->cp += nwrite;
vty->length = MAX(vty->cp, vty->length);
vty->buf[vty->length] = '\0';
vty_write(vty, str, nwrite);
}
/* Forward character. */
static void vty_forward_char(struct vty *vty)
{
if (vty->cp < vty->length) {
vty_write(vty, &vty->buf[vty->cp], 1);
vty->cp++;
}
}
/* Backward character. */
static void vty_backward_char(struct vty *vty)
{
if (vty->cp > 0) {
vty->cp--;
vty_write(vty, &telnet_backward_char, 1);
}
}
/* Move to the beginning of the line. */
static void vty_beginning_of_line(struct vty *vty)
{
while (vty->cp)
vty_backward_char(vty);
}
/* Move to the end of the line. */
static void vty_end_of_line(struct vty *vty)
{
while (vty->cp < vty->length)
vty_forward_char(vty);
}
static void vty_kill_line_from_beginning(struct vty *);
static void vty_redraw_line(struct vty *);
/* Print command line history. This function is called from
vty_next_line and vty_previous_line. */
static void vty_history_print(struct vty *vty)
{
int length;
vty_kill_line_from_beginning(vty);
/* Get previous line from history buffer */
length = strlen(vty->hist[vty->hp]);
memcpy(vty->buf, vty->hist[vty->hp], length);
vty->cp = vty->length = length;
vty->buf[vty->length] = '\0';
/* Redraw current line */
vty_redraw_line(vty);
}
/* Show next command line history. */
static void vty_next_line(struct vty *vty)
{
int try_index;
if (vty->hp == vty->hindex)
return;
/* Try is there history exist or not. */
try_index = vty->hp;
if (try_index == (VTY_MAXHIST - 1))
try_index = 0;
else
try_index++;
/* If there is not history return. */
if (vty->hist[try_index] == NULL)
return;
else
vty->hp = try_index;
vty_history_print(vty);
}
/* Show previous command line history. */
static void vty_previous_line(struct vty *vty)
{
int try_index;
try_index = vty->hp;
if (try_index == 0)
try_index = VTY_MAXHIST - 1;
else
try_index--;
if (vty->hist[try_index] == NULL)
return;
else
vty->hp = try_index;
vty_history_print(vty);
}
/* This function redraw all of the command line character. */
static void vty_redraw_line(struct vty *vty)
{
vty_write(vty, vty->buf, vty->length);
vty->cp = vty->length;
}
/* Forward word. */
static void vty_forward_word(struct vty *vty)
{
while (vty->cp != vty->length && vty->buf[vty->cp] != ' ')
vty_forward_char(vty);
while (vty->cp != vty->length && vty->buf[vty->cp] == ' ')
vty_forward_char(vty);
}
/* Backward word without skipping training space. */
static void vty_backward_pure_word(struct vty *vty)
{
while (vty->cp > 0 && vty->buf[vty->cp - 1] != ' ')
vty_backward_char(vty);
}
/* Backward word. */
static void vty_backward_word(struct vty *vty)
{
while (vty->cp > 0 && vty->buf[vty->cp - 1] == ' ')
vty_backward_char(vty);
while (vty->cp > 0 && vty->buf[vty->cp - 1] != ' ')
vty_backward_char(vty);
}
/* When '^D' is typed at the beginning of the line we move to the down
level. */
static void vty_down_level(struct vty *vty)
{
vty_out(vty, "\n");
cmd_exit(vty);
vty_prompt(vty);
vty->cp = 0;
}
/* When '^Z' is received from vty, move down to the enable mode. */
static void vty_end_config(struct vty *vty)
{
vty_out(vty, "\n");
if (vty->config) {
vty_config_exit(vty);
vty->node = ENABLE_NODE;
}
vty_prompt(vty);
vty->cp = 0;
}
/* Delete a character at the current point. */
static void vty_delete_char(struct vty *vty)
{
int i;
int size;
if (vty->length == 0) {
vty_down_level(vty);
return;
}
if (vty->cp == vty->length)
return; /* completion need here? */
size = vty->length - vty->cp;
vty->length--;
memmove(&vty->buf[vty->cp], &vty->buf[vty->cp + 1], size - 1);
vty->buf[vty->length] = '\0';
if (vty->node == AUTH_NODE || vty->node == AUTH_ENABLE_NODE)
return;
vty_write(vty, &vty->buf[vty->cp], size - 1);
vty_write(vty, &telnet_space_char, 1);
for (i = 0; i < size; i++)
vty_write(vty, &telnet_backward_char, 1);
}
/* Delete a character before the point. */
static void vty_delete_backward_char(struct vty *vty)
{
if (vty->cp == 0)
return;
vty_backward_char(vty);
vty_delete_char(vty);
}
/* Kill rest of line from current point. */
static void vty_kill_line(struct vty *vty)
{
int i;
int size;
size = vty->length - vty->cp;
if (size == 0)
return;
for (i = 0; i < size; i++)
vty_write(vty, &telnet_space_char, 1);
for (i = 0; i < size; i++)
vty_write(vty, &telnet_backward_char, 1);
memset(&vty->buf[vty->cp], 0, size);
vty->length = vty->cp;
}
/* Kill line from the beginning. */
static void vty_kill_line_from_beginning(struct vty *vty)
{
vty_beginning_of_line(vty);
vty_kill_line(vty);
}
/* Delete a word before the point. */
static void vty_forward_kill_word(struct vty *vty)
{
while (vty->cp != vty->length && vty->buf[vty->cp] == ' ')
vty_delete_char(vty);
while (vty->cp != vty->length && vty->buf[vty->cp] != ' ')
vty_delete_char(vty);
}
/* Delete a word before the point. */
static void vty_backward_kill_word(struct vty *vty)
{
while (vty->cp > 0 && vty->buf[vty->cp - 1] == ' ')
vty_delete_backward_char(vty);
while (vty->cp > 0 && vty->buf[vty->cp - 1] != ' ')
vty_delete_backward_char(vty);
}
/* Transpose chars before or at the point. */
static void vty_transpose_chars(struct vty *vty)
{
char c1, c2;
/* If length is short or point is near by the beginning of line then
return. */
if (vty->length < 2 || vty->cp < 1)
return;
/* In case of point is located at the end of the line. */
if (vty->cp == vty->length) {
c1 = vty->buf[vty->cp - 1];
c2 = vty->buf[vty->cp - 2];
vty_backward_char(vty);
vty_backward_char(vty);
vty_self_insert_overwrite(vty, c1);
vty_self_insert_overwrite(vty, c2);
} else {
c1 = vty->buf[vty->cp];
c2 = vty->buf[vty->cp - 1];
vty_backward_char(vty);
vty_self_insert_overwrite(vty, c1);
vty_self_insert_overwrite(vty, c2);
}
}
/* Do completion at vty interface. */
static void vty_complete_command(struct vty *vty)
{
int i;
int ret;
char **matched = NULL;
vector vline;
if (vty->node == AUTH_NODE || vty->node == AUTH_ENABLE_NODE)
return;
vline = cmd_make_strvec(vty->buf);
if (vline == NULL)
return;
/* In case of 'help \t'. */
if (isspace((unsigned char)vty->buf[vty->length - 1]))
vector_set(vline, NULL);
matched = cmd_complete_command(vline, vty, &ret);
cmd_free_strvec(vline);
vty_out(vty, "\n");
switch (ret) {
case CMD_ERR_AMBIGUOUS:
vty_out(vty, "%% Ambiguous command.\n");
vty_prompt(vty);
vty_redraw_line(vty);
break;
case CMD_ERR_NO_MATCH:
/* vty_out (vty, "%% There is no matched command.\n"); */
vty_prompt(vty);
vty_redraw_line(vty);
break;
case CMD_COMPLETE_FULL_MATCH:
if (!matched[0]) {
/* 2016-11-28 equinox -- need to debug, SEGV here */
vty_out(vty, "%% CLI BUG: FULL_MATCH with NULL str\n");
vty_prompt(vty);
vty_redraw_line(vty);
break;
}
vty_prompt(vty);
vty_redraw_line(vty);
vty_backward_pure_word(vty);
vty_insert_word_overwrite(vty, matched[0]);
vty_self_insert(vty, ' ');
XFREE(MTYPE_COMPLETION, matched[0]);
break;
case CMD_COMPLETE_MATCH:
vty_prompt(vty);
vty_redraw_line(vty);
vty_backward_pure_word(vty);
vty_insert_word_overwrite(vty, matched[0]);
XFREE(MTYPE_COMPLETION, matched[0]);
break;
case CMD_COMPLETE_LIST_MATCH:
for (i = 0; matched[i] != NULL; i++) {
if (i != 0 && ((i % 6) == 0))
vty_out(vty, "\n");
vty_out(vty, "%-10s ", matched[i]);
XFREE(MTYPE_COMPLETION, matched[i]);
}
vty_out(vty, "\n");
vty_prompt(vty);
vty_redraw_line(vty);
break;
case CMD_ERR_NOTHING_TODO:
vty_prompt(vty);
vty_redraw_line(vty);
break;
default:
break;
}
XFREE(MTYPE_TMP, matched);
}
static void vty_describe_fold(struct vty *vty, int cmd_width,
unsigned int desc_width, struct cmd_token *token)
{
char *buf;
const char *cmd, *p;
int pos;
cmd = token->text;
if (desc_width <= 0) {
vty_out(vty, " %-*s %s\n", cmd_width, cmd, token->desc);
return;
}
buf = XCALLOC(MTYPE_TMP, strlen(token->desc) + 1);
for (p = token->desc; strlen(p) > desc_width; p += pos + 1) {
for (pos = desc_width; pos > 0; pos--)
if (*(p + pos) == ' ')
break;
if (pos == 0)
break;
memcpy(buf, p, pos);
buf[pos] = '\0';
vty_out(vty, " %-*s %s\n", cmd_width, cmd, buf);
cmd = "";
}
vty_out(vty, " %-*s %s\n", cmd_width, cmd, p);
XFREE(MTYPE_TMP, buf);
}
/* Describe matched command function. */
static void vty_describe_command(struct vty *vty)
{
int ret;
vector vline;
vector describe;
unsigned int i, width, desc_width;
struct cmd_token *token, *token_cr = NULL;
vline = cmd_make_strvec(vty->buf);
/* In case of '> ?'. */
if (vline == NULL) {
vline = vector_init(1);
vector_set(vline, NULL);
} else if (isspace((unsigned char)vty->buf[vty->length - 1]))
vector_set(vline, NULL);
describe = cmd_describe_command(vline, vty, &ret);
vty_out(vty, "\n");
/* Ambiguous error. */
switch (ret) {
case CMD_ERR_AMBIGUOUS:
vty_out(vty, "%% Ambiguous command.\n");
goto out;
break;
case CMD_ERR_NO_MATCH:
vty_out(vty, "%% There is no matched command.\n");
goto out;
break;
}
/* Get width of command string. */
width = 0;
for (i = 0; i < vector_active(describe); i++)
if ((token = vector_slot(describe, i)) != NULL) {
unsigned int len;
if (token->text[0] == '\0')
continue;
len = strlen(token->text);
if (width < len)
width = len;
}
/* Get width of description string. */
desc_width = vty->width - (width + 6);
/* Print out description. */
for (i = 0; i < vector_active(describe); i++)
if ((token = vector_slot(describe, i)) != NULL) {
if (token->text[0] == '\0')
continue;
if (strcmp(token->text, CMD_CR_TEXT) == 0) {
token_cr = token;
continue;
}
if (!token->desc)
vty_out(vty, " %-s\n", token->text);
else if (desc_width >= strlen(token->desc))
vty_out(vty, " %-*s %s\n", width, token->text,
token->desc);
else
vty_describe_fold(vty, width, desc_width,
token);
if (IS_VARYING_TOKEN(token->type)) {
const char *ref = vector_slot(
vline, vector_active(vline) - 1);
vector varcomps = vector_init(VECTOR_MIN_SIZE);
cmd_variable_complete(token, ref, varcomps);
if (vector_active(varcomps) > 0) {
char *ac = cmd_variable_comp2str(
varcomps, vty->width);
vty_out(vty, "%s\n", ac);
XFREE(MTYPE_TMP, ac);
}
vector_free(varcomps);
}
}
if ((token = token_cr)) {
if (!token->desc)
vty_out(vty, " %-s\n", token->text);
else if (desc_width >= strlen(token->desc))
vty_out(vty, " %-*s %s\n", width, token->text,
token->desc);
else
vty_describe_fold(vty, width, desc_width, token);
}
out:
cmd_free_strvec(vline);
if (describe)
vector_free(describe);
vty_prompt(vty);
vty_redraw_line(vty);
}
static void vty_clear_buf(struct vty *vty)
{
memset(vty->buf, 0, vty->max);
}
/* ^C stop current input and do not add command line to the history. */
static void vty_stop_input(struct vty *vty)
{
vty->cp = vty->length = 0;
vty_clear_buf(vty);
vty_out(vty, "\n");
if (vty->config) {
vty_config_exit(vty);
vty->node = ENABLE_NODE;
}
vty_prompt(vty);
/* Set history pointer to the latest one. */
vty->hp = vty->hindex;
}
/* Add current command line to the history buffer. */
static void vty_hist_add(struct vty *vty)
{
int index;
if (vty->length == 0)
return;
index = vty->hindex ? vty->hindex - 1 : VTY_MAXHIST - 1;
/* Ignore the same string as previous one. */
if (vty->hist[index])
if (strcmp(vty->buf, vty->hist[index]) == 0) {
vty->hp = vty->hindex;
return;
}
/* Insert history entry. */
XFREE(MTYPE_VTY_HIST, vty->hist[vty->hindex]);
vty->hist[vty->hindex] = XSTRDUP(MTYPE_VTY_HIST, vty->buf);
/* History index rotation. */
vty->hindex++;
if (vty->hindex == VTY_MAXHIST)
vty->hindex = 0;
vty->hp = vty->hindex;
}
/* #define TELNET_OPTION_DEBUG */
/* Get telnet window size. */
static int vty_telnet_option(struct vty *vty, unsigned char *buf, int nbytes)
{
#ifdef TELNET_OPTION_DEBUG
int i;
for (i = 0; i < nbytes; i++) {
switch (buf[i]) {
case IAC:
vty_out(vty, "IAC ");
break;
case WILL:
vty_out(vty, "WILL ");
break;
case WONT:
vty_out(vty, "WONT ");
break;
case DO:
vty_out(vty, "DO ");
break;
case DONT:
vty_out(vty, "DONT ");
break;
case SB:
vty_out(vty, "SB ");
break;
case SE:
vty_out(vty, "SE ");
break;
case TELOPT_ECHO:
vty_out(vty, "TELOPT_ECHO \n");
break;
case TELOPT_SGA:
vty_out(vty, "TELOPT_SGA \n");
break;
case TELOPT_NAWS:
vty_out(vty, "TELOPT_NAWS \n");
break;
default:
vty_out(vty, "%x ", buf[i]);
break;
}
}
vty_out(vty, "\n");
#endif /* TELNET_OPTION_DEBUG */
switch (buf[0]) {
case SB:
vty->sb_len = 0;
vty->iac_sb_in_progress = 1;
return 0;
case SE: {
if (!vty->iac_sb_in_progress)
return 0;
if ((vty->sb_len == 0) || (vty->sb_buf[0] == '\0')) {
vty->iac_sb_in_progress = 0;
return 0;
}
switch (vty->sb_buf[0]) {
case TELOPT_NAWS:
if (vty->sb_len != TELNET_NAWS_SB_LEN)
flog_err(
EC_LIB_SYSTEM_CALL,
"RFC 1073 violation detected: telnet NAWS option should send %d characters, but we received %lu",
TELNET_NAWS_SB_LEN,
(unsigned long)vty->sb_len);
else if (sizeof(vty->sb_buf) < TELNET_NAWS_SB_LEN)
flog_err(
EC_LIB_DEVELOPMENT,
"Bug detected: sizeof(vty->sb_buf) %lu < %d, too small to handle the telnet NAWS option",
(unsigned long)sizeof(vty->sb_buf),
TELNET_NAWS_SB_LEN);
else {
vty->width = ((vty->sb_buf[1] << 8)
| vty->sb_buf[2]);
vty->height = ((vty->sb_buf[3] << 8)
| vty->sb_buf[4]);
#ifdef TELNET_OPTION_DEBUG
vty_out(vty,
"TELNET NAWS window size negotiation completed: width %d, height %d\n",
vty->width, vty->height);
#endif
}
break;
}
vty->iac_sb_in_progress = 0;
return 0;
}
default:
break;
}
return 1;
}
/* Execute current command line. */
static int vty_execute(struct vty *vty)
{
int ret;
ret = CMD_SUCCESS;
switch (vty->node) {
case AUTH_NODE:
case AUTH_ENABLE_NODE:
vty_auth(vty, vty->buf);
break;
default:
ret = vty_command(vty, vty->buf);
if (vty->type == VTY_TERM)
vty_hist_add(vty);
break;
}
/* Clear command line buffer. */
vty->cp = vty->length = 0;
vty_clear_buf(vty);
if (vty->status != VTY_CLOSE)
vty_prompt(vty);
return ret;
}
#define CONTROL(X) ((X) - '@')
#define VTY_NORMAL 0
#define VTY_PRE_ESCAPE 1
#define VTY_ESCAPE 2
#define VTY_CR 3
/* Escape character command map. */
static void vty_escape_map(unsigned char c, struct vty *vty)
{
switch (c) {
case ('A'):
vty_previous_line(vty);
break;
case ('B'):
vty_next_line(vty);
break;
case ('C'):
vty_forward_char(vty);
break;
case ('D'):
vty_backward_char(vty);
break;
default:
break;
}
/* Go back to normal mode. */
vty->escape = VTY_NORMAL;
}
/* Quit print out to the buffer. */
static void vty_buffer_reset(struct vty *vty)
{
buffer_reset(vty->obuf);
buffer_reset(vty->lbuf);
vty_prompt(vty);
vty_redraw_line(vty);
}
/* Read data via vty socket. */
static void vty_read(struct event *thread)
{
int i;
int nbytes;
unsigned char buf[VTY_READ_BUFSIZ];
struct vty *vty = THREAD_ARG(thread);
/* Read raw data from socket */
if ((nbytes = read(vty->fd, buf, VTY_READ_BUFSIZ)) <= 0) {
if (nbytes < 0) {
if (ERRNO_IO_RETRY(errno)) {
vty_event(VTY_READ, vty);
return;
}
flog_err(
EC_LIB_SOCKET,
"%s: read error on vty client fd %d, closing: %s",
__func__, vty->fd, safe_strerror(errno));
buffer_reset(vty->obuf);
buffer_reset(vty->lbuf);
}
vty->status = VTY_CLOSE;
}
for (i = 0; i < nbytes; i++) {
if (buf[i] == IAC) {
if (!vty->iac) {
vty->iac = 1;
continue;
} else {
vty->iac = 0;
}
}
if (vty->iac_sb_in_progress && !vty->iac) {
if (vty->sb_len < sizeof(vty->sb_buf))
vty->sb_buf[vty->sb_len] = buf[i];
vty->sb_len++;
continue;
}
if (vty->iac) {
/* In case of telnet command */
int ret = 0;
ret = vty_telnet_option(vty, buf + i, nbytes - i);
vty->iac = 0;
i += ret;
continue;
}
if (vty->status == VTY_MORE) {
switch (buf[i]) {
case CONTROL('C'):
case 'q':
case 'Q':
vty_buffer_reset(vty);
break;
default:
break;
}
continue;
}
/* Escape character. */
if (vty->escape == VTY_ESCAPE) {
vty_escape_map(buf[i], vty);
continue;
}
/* Pre-escape status. */
if (vty->escape == VTY_PRE_ESCAPE) {
switch (buf[i]) {
case '[':
vty->escape = VTY_ESCAPE;
break;
case 'b':
vty_backward_word(vty);
vty->escape = VTY_NORMAL;
break;
case 'f':
vty_forward_word(vty);
vty->escape = VTY_NORMAL;
break;
case 'd':
vty_forward_kill_word(vty);
vty->escape = VTY_NORMAL;
break;
case CONTROL('H'):
case 0x7f:
vty_backward_kill_word(vty);
vty->escape = VTY_NORMAL;
break;
default:
vty->escape = VTY_NORMAL;
break;
}
continue;
}
if (vty->escape == VTY_CR) {
/* if we get CR+NL, the NL results in an extra empty
* prompt line being printed without this; just drop
* the NL if it immediately follows CR.
*/
vty->escape = VTY_NORMAL;
if (buf[i] == '\n')
continue;
}
switch (buf[i]) {
case CONTROL('A'):
vty_beginning_of_line(vty);
break;
case CONTROL('B'):
vty_backward_char(vty);
break;
case CONTROL('C'):
vty_stop_input(vty);
break;
case CONTROL('D'):
vty_delete_char(vty);
break;
case CONTROL('E'):
vty_end_of_line(vty);
break;
case CONTROL('F'):
vty_forward_char(vty);
break;
case CONTROL('H'):
case 0x7f:
vty_delete_backward_char(vty);
break;
case CONTROL('K'):
vty_kill_line(vty);
break;
case CONTROL('N'):
vty_next_line(vty);
break;
case CONTROL('P'):
vty_previous_line(vty);
break;
case CONTROL('T'):
vty_transpose_chars(vty);
break;
case CONTROL('U'):
vty_kill_line_from_beginning(vty);
break;
case CONTROL('W'):
vty_backward_kill_word(vty);
break;
case CONTROL('Z'):
vty_end_config(vty);
break;
case '\r':
vty->escape = VTY_CR;
/* fallthru */
case '\n':
vty_out(vty, "\n");
buffer_flush_available(vty->obuf, vty->wfd);
vty_execute(vty);
if (vty->pass_fd != -1) {
close(vty->pass_fd);
vty->pass_fd = -1;
}
break;
case '\t':
vty_complete_command(vty);
break;
case '?':
if (vty->node == AUTH_NODE
|| vty->node == AUTH_ENABLE_NODE)
vty_self_insert(vty, buf[i]);
else
vty_describe_command(vty);
break;
case '\033':
if (i + 1 < nbytes && buf[i + 1] == '[') {
vty->escape = VTY_ESCAPE;
i++;
} else
vty->escape = VTY_PRE_ESCAPE;
break;
default:
if (buf[i] > 31 && buf[i] < 127)
vty_self_insert(vty, buf[i]);
break;
}
}
/* Check status. */
if (vty->status == VTY_CLOSE)
vty_close(vty);
else {
vty_event(VTY_WRITE, vty);
vty_event(VTY_READ, vty);
}
}
/* Flush buffer to the vty. */
static void vty_flush(struct event *thread)
{
int erase;
buffer_status_t flushrc;
struct vty *vty = THREAD_ARG(thread);
/* Tempolary disable read thread. */
if (vty->lines == 0)
THREAD_OFF(vty->t_read);
/* Function execution continue. */
erase = ((vty->status == VTY_MORE || vty->status == VTY_MORELINE));
/* N.B. if width is 0, that means we don't know the window size. */
if ((vty->lines == 0) || (vty->width == 0) || (vty->height == 0))
flushrc = buffer_flush_available(vty->obuf, vty->wfd);
else if (vty->status == VTY_MORELINE)
flushrc = buffer_flush_window(vty->obuf, vty->wfd, vty->width,
1, erase, 0);
else
flushrc = buffer_flush_window(
vty->obuf, vty->wfd, vty->width,
vty->lines >= 0 ? vty->lines : vty->height, erase, 0);
switch (flushrc) {
case BUFFER_ERROR:
zlog_info("buffer_flush failed on vty client fd %d/%d, closing",
vty->fd, vty->wfd);
buffer_reset(vty->lbuf);
buffer_reset(vty->obuf);
vty_close(vty);
return;
case BUFFER_EMPTY:
if (vty->status == VTY_CLOSE)
vty_close(vty);
else {
vty->status = VTY_NORMAL;
if (vty->lines == 0)
vty_event(VTY_READ, vty);
}
break;
case BUFFER_PENDING:
/* There is more data waiting to be written. */
vty->status = VTY_MORE;
if (vty->lines == 0)
vty_event(VTY_WRITE, vty);
break;
}
}
/* Allocate new vty struct. */
struct vty *vty_new(void)
{
struct vty *new = XCALLOC(MTYPE_VTY, sizeof(struct vty));
new->fd = new->wfd = -1;
new->of = stdout;
new->lbuf = buffer_new(0);
new->obuf = buffer_new(0); /* Use default buffer size. */
new->buf = XCALLOC(MTYPE_VTY, VTY_BUFSIZ);
new->max = VTY_BUFSIZ;
new->pass_fd = -1;
if (mgmt_lib_hndl) {
new->mgmt_client_id = mgmt_client_id_next++;
if (mgmt_fe_create_client_session(
mgmt_lib_hndl, new->mgmt_client_id,
(uintptr_t) new) != MGMTD_SUCCESS)
zlog_err(
"Failed to open a MGMTD Frontend session for VTY session %p!!",
new);
}
return new;
}
/* allocate and initialise vty */
static struct vty *vty_new_init(int vty_sock)
{
struct vty *vty;
vty = vty_new();
vty->fd = vty_sock;
vty->wfd = vty_sock;
vty->type = VTY_TERM;
vty->node = AUTH_NODE;
vty->fail = 0;
vty->cp = 0;
vty_clear_buf(vty);
vty->length = 0;
memset(vty->hist, 0, sizeof(vty->hist));
vty->hp = 0;
vty->hindex = 0;
vty->xpath_index = 0;
memset(vty->xpath, 0, sizeof(vty->xpath));
vty->private_config = false;
vty->candidate_config = vty_shared_candidate_config;
vty->status = VTY_NORMAL;
vty->lines = -1;
vty->iac = 0;
vty->iac_sb_in_progress = 0;
vty->sb_len = 0;
vtys_add_tail(vty_sessions, vty);
return vty;
}
/* Create new vty structure. */
static struct vty *vty_create(int vty_sock, union sockunion *su)
{
char buf[SU_ADDRSTRLEN];
struct vty *vty;
sockunion2str(su, buf, SU_ADDRSTRLEN);
/* Allocate new vty structure and set up default values. */
vty = vty_new_init(vty_sock);
/* configurable parameters not part of basic init */
vty->v_timeout = vty_timeout_val;
strlcpy(vty->address, buf, sizeof(vty->address));
if (no_password_check) {
if (host.advanced)
vty->node = ENABLE_NODE;
else
vty->node = VIEW_NODE;
}
if (host.lines >= 0)
vty->lines = host.lines;
if (!no_password_check) {
/* Vty is not available if password isn't set. */
if (host.password == NULL && host.password_encrypt == NULL) {
vty_out(vty, "Vty password is not set.\n");
vty->status = VTY_CLOSE;
vty_close(vty);
return NULL;
}
}
/* Say hello to the world. */
vty_hello(vty);
if (!no_password_check)
vty_out(vty, "\nUser Access Verification\n\n");
/* Setting up terminal. */
vty_will_echo(vty);
vty_will_suppress_go_ahead(vty);
vty_dont_linemode(vty);
vty_do_window_size(vty);
/* vty_dont_lflow_ahead (vty); */
vty_prompt(vty);
/* Add read/write thread. */
vty_event(VTY_WRITE, vty);
vty_event(VTY_READ, vty);
return vty;
}
/* create vty for stdio */
static struct termios stdio_orig_termios;
static struct vty *stdio_vty = NULL;
static bool stdio_termios = false;
static void (*stdio_vty_atclose)(int isexit);
static void vty_stdio_reset(int isexit)
{
if (stdio_vty) {
if (stdio_termios)
tcsetattr(0, TCSANOW, &stdio_orig_termios);
stdio_termios = false;
stdio_vty = NULL;
if (stdio_vty_atclose)
stdio_vty_atclose(isexit);
stdio_vty_atclose = NULL;
}
}
static void vty_stdio_atexit(void)
{
vty_stdio_reset(1);
}
void vty_stdio_suspend(void)
{
if (!stdio_vty)
return;
THREAD_OFF(stdio_vty->t_write);
THREAD_OFF(stdio_vty->t_read);
THREAD_OFF(stdio_vty->t_timeout);
if (stdio_termios)
tcsetattr(0, TCSANOW, &stdio_orig_termios);
stdio_termios = false;
}
void vty_stdio_resume(void)
{
if (!stdio_vty)
return;
if (!tcgetattr(0, &stdio_orig_termios)) {
struct termios termios;
termios = stdio_orig_termios;
termios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR
| IGNCR | ICRNL | IXON);
termios.c_lflag &= ~(ECHO | ECHONL | ICANON | IEXTEN);
termios.c_cflag &= ~(CSIZE | PARENB);
termios.c_cflag |= CS8;
tcsetattr(0, TCSANOW, &termios);
stdio_termios = true;
}
vty_prompt(stdio_vty);
/* Add read/write thread. */
vty_event(VTY_WRITE, stdio_vty);
vty_event(VTY_READ, stdio_vty);
}
void vty_stdio_close(void)
{
if (!stdio_vty)
return;
vty_close(stdio_vty);
}
struct vty *vty_stdio(void (*atclose)(int isexit))
{
struct vty *vty;
/* refuse creating two vtys on stdio */
if (stdio_vty)
return NULL;
vty = stdio_vty = vty_new_init(0);
stdio_vty_atclose = atclose;
vty->wfd = 1;
/* always have stdio vty in a known _unchangeable_ state, don't want
* config
* to have any effect here to make sure scripting this works as intended
*/
vty->node = ENABLE_NODE;
vty->v_timeout = 0;
strlcpy(vty->address, "console", sizeof(vty->address));
vty_stdio_resume();
return vty;
}
/* Accept connection from the network. */
static void vty_accept(struct event *thread)
{
struct vty_serv *vtyserv = THREAD_ARG(thread);
int vty_sock;
union sockunion su;
int ret;
unsigned int on;
int accept_sock = vtyserv->sock;
struct prefix p;
struct access_list *acl = NULL;
/* We continue hearing vty socket. */
vty_event_serv(VTY_SERV, vtyserv);
memset(&su, 0, sizeof(union sockunion));
/* We can handle IPv4 or IPv6 socket. */
vty_sock = sockunion_accept(accept_sock, &su);
if (vty_sock < 0) {
flog_err(EC_LIB_SOCKET, "can't accept vty socket : %s",
safe_strerror(errno));
return;
}
set_nonblocking(vty_sock);
set_cloexec(vty_sock);
if (!sockunion2hostprefix(&su, &p)) {
close(vty_sock);
zlog_info("Vty unable to convert prefix from sockunion %pSU",
&su);
return;
}
/* VTY's accesslist apply. */
if (p.family == AF_INET && vty_accesslist_name) {
if ((acl = access_list_lookup(AFI_IP, vty_accesslist_name))
&& (access_list_apply(acl, &p) == FILTER_DENY)) {
zlog_info("Vty connection refused from %pSU", &su);
close(vty_sock);
return;
}
}
/* VTY's ipv6 accesslist apply. */
if (p.family == AF_INET6 && vty_ipv6_accesslist_name) {
if ((acl = access_list_lookup(AFI_IP6,
vty_ipv6_accesslist_name))
&& (access_list_apply(acl, &p) == FILTER_DENY)) {
zlog_info("Vty connection refused from %pSU", &su);
close(vty_sock);
return;
}
}
on = 1;
ret = setsockopt(vty_sock, IPPROTO_TCP, TCP_NODELAY, (char *)&on,
sizeof(on));
if (ret < 0)
zlog_info("can't set sockopt to vty_sock : %s",
safe_strerror(errno));
zlog_info("Vty connection from %pSU", &su);
vty_create(vty_sock, &su);
}
static void vty_serv_sock_addrinfo(const char *hostname, unsigned short port)
{
int ret;
struct addrinfo req;
struct addrinfo *ainfo;
struct addrinfo *ainfo_save;
int sock;
char port_str[BUFSIZ];
memset(&req, 0, sizeof(req));
req.ai_flags = AI_PASSIVE;
req.ai_family = AF_UNSPEC;
req.ai_socktype = SOCK_STREAM;
snprintf(port_str, sizeof(port_str), "%d", port);
port_str[sizeof(port_str) - 1] = '\0';
ret = getaddrinfo(hostname, port_str, &req, &ainfo);
if (ret != 0) {
flog_err_sys(EC_LIB_SYSTEM_CALL, "getaddrinfo failed: %s",
gai_strerror(ret));
exit(1);
}
ainfo_save = ainfo;
do {
struct vty_serv *vtyserv;
if (ainfo->ai_family != AF_INET && ainfo->ai_family != AF_INET6)
continue;
sock = socket(ainfo->ai_family, ainfo->ai_socktype,
ainfo->ai_protocol);
if (sock < 0)
continue;
sockopt_v6only(ainfo->ai_family, sock);
sockopt_reuseaddr(sock);
sockopt_reuseport(sock);
set_cloexec(sock);
ret = bind(sock, ainfo->ai_addr, ainfo->ai_addrlen);
if (ret < 0) {
close(sock); /* Avoid sd leak. */
continue;
}
ret = listen(sock, 3);
if (ret < 0) {
close(sock); /* Avoid sd leak. */
continue;
}
vtyserv = XCALLOC(MTYPE_VTY_SERV, sizeof(*vtyserv));
vtyserv->sock = sock;
vtyservs_add_tail(vty_servs, vtyserv);
vty_event_serv(VTY_SERV, vtyserv);
} while ((ainfo = ainfo->ai_next) != NULL);
freeaddrinfo(ainfo_save);
}
#ifdef VTYSH
/* For sockaddr_un. */
#include <sys/un.h>
/* VTY shell UNIX domain socket. */
static void vty_serv_un(const char *path)
{
struct vty_serv *vtyserv;
int ret;
int sock, len;
struct sockaddr_un serv;
mode_t old_mask;
struct zprivs_ids_t ids;
/* First of all, unlink existing socket */
unlink(path);
/* Set umask */
old_mask = umask(0007);
/* Make UNIX domain socket. */
sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (sock < 0) {
flog_err_sys(EC_LIB_SOCKET,
"Cannot create unix stream socket: %s",
safe_strerror(errno));
return;
}
/* Make server socket. */
memset(&serv, 0, sizeof(serv));
serv.sun_family = AF_UNIX;
strlcpy(serv.sun_path, path, sizeof(serv.sun_path));
#ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN
len = serv.sun_len = SUN_LEN(&serv);
#else
len = sizeof(serv.sun_family) + strlen(serv.sun_path);
#endif /* HAVE_STRUCT_SOCKADDR_UN_SUN_LEN */
set_cloexec(sock);
ret = bind(sock, (struct sockaddr *)&serv, len);
if (ret < 0) {
flog_err_sys(EC_LIB_SOCKET, "Cannot bind path %s: %s", path,
safe_strerror(errno));
close(sock); /* Avoid sd leak. */
return;
}
ret = listen(sock, 5);
if (ret < 0) {
flog_err_sys(EC_LIB_SOCKET, "listen(fd %d) failed: %s", sock,
safe_strerror(errno));
close(sock); /* Avoid sd leak. */
return;
}
umask(old_mask);
zprivs_get_ids(&ids);
/* Hack: ids.gid_vty is actually a uint, but we stored -1 in it
earlier for the case when we don't need to chown the file
type casting it here to make a compare */
if ((int)ids.gid_vty > 0) {
/* set group of socket */
if (chown(path, -1, ids.gid_vty)) {
flog_err_sys(EC_LIB_SYSTEM_CALL,
"vty_serv_un: could chown socket, %s",
safe_strerror(errno));
}
}
vtyserv = XCALLOC(MTYPE_VTY_SERV, sizeof(*vtyserv));
vtyserv->sock = sock;
vtyserv->vtysh = true;
vtyservs_add_tail(vty_servs, vtyserv);
vty_event_serv(VTYSH_SERV, vtyserv);
}
/* #define VTYSH_DEBUG 1 */
static void vtysh_accept(struct event *thread)
{
struct vty_serv *vtyserv = THREAD_ARG(thread);
int accept_sock = vtyserv->sock;
int sock;
int client_len;
struct sockaddr_un client;
struct vty *vty;
vty_event_serv(VTYSH_SERV, vtyserv);
memset(&client, 0, sizeof(client));
client_len = sizeof(struct sockaddr_un);
sock = accept(accept_sock, (struct sockaddr *)&client,
(socklen_t *)&client_len);
if (sock < 0) {
flog_err(EC_LIB_SOCKET, "can't accept vty socket : %s",
safe_strerror(errno));
return;
}
if (set_nonblocking(sock) < 0) {
flog_err(
EC_LIB_SOCKET,
"vtysh_accept: could not set vty socket %d to non-blocking, %s, closing",
sock, safe_strerror(errno));
close(sock);
return;
}
set_cloexec(sock);
#ifdef VTYSH_DEBUG
printf("VTY shell accept\n");
#endif /* VTYSH_DEBUG */
vty = vty_new();
vty->fd = sock;
vty->wfd = sock;
vty->type = VTY_SHELL_SERV;
vty->node = VIEW_NODE;
vtys_add_tail(vtysh_sessions, vty);
vty_event(VTYSH_READ, vty);
}
static int vtysh_do_pass_fd(struct vty *vty)
{
struct iovec iov[1] = {
{
.iov_base = vty->pass_fd_status,
.iov_len = sizeof(vty->pass_fd_status),
},
};
union {
uint8_t buf[CMSG_SPACE(sizeof(int))];
struct cmsghdr align;
} u;
struct msghdr mh = {
.msg_iov = iov,
.msg_iovlen = array_size(iov),
.msg_control = u.buf,
.msg_controllen = sizeof(u.buf),
};
struct cmsghdr *cmh = CMSG_FIRSTHDR(&mh);
ssize_t ret;
memset(&u.buf, 0, sizeof(u.buf));
cmh->cmsg_level = SOL_SOCKET;
cmh->cmsg_type = SCM_RIGHTS;
cmh->cmsg_len = CMSG_LEN(sizeof(int));
memcpy(CMSG_DATA(cmh), &vty->pass_fd, sizeof(int));
ret = sendmsg(vty->wfd, &mh, 0);
if (ret < 0 && ERRNO_IO_RETRY(errno))
return BUFFER_PENDING;
close(vty->pass_fd);
vty->pass_fd = -1;
vty->status = VTY_NORMAL;
if (ret <= 0)
return BUFFER_ERROR;
/* resume accepting commands (suspended in vtysh_read) */
vty_event(VTYSH_READ, vty);
if ((size_t)ret < sizeof(vty->pass_fd_status)) {
size_t remains = sizeof(vty->pass_fd_status) - ret;
buffer_put(vty->obuf, vty->pass_fd_status + ret, remains);
return BUFFER_PENDING;
}
return BUFFER_EMPTY;
}
static int vtysh_flush(struct vty *vty)
{
int ret;
ret = buffer_flush_available(vty->obuf, vty->wfd);
if (ret == BUFFER_EMPTY && vty->status == VTY_PASSFD)
ret = vtysh_do_pass_fd(vty);
switch (ret) {
case BUFFER_PENDING:
vty_event(VTYSH_WRITE, vty);
break;
case BUFFER_ERROR:
flog_err(EC_LIB_SOCKET, "%s: write error to fd %d, closing",
__func__, vty->fd);
buffer_reset(vty->lbuf);
buffer_reset(vty->obuf);
vty_close(vty);
return -1;
case BUFFER_EMPTY:
break;
}
return 0;
}
void vty_pass_fd(struct vty *vty, int fd)
{
if (vty->pass_fd != -1)
close(vty->pass_fd);
vty->pass_fd = fd;
}
static void vtysh_read(struct event *thread)
{
int ret;
int sock;
int nbytes;
struct vty *vty;
unsigned char buf[VTY_READ_BUFSIZ];
unsigned char *p;
uint8_t header[4] = {0, 0, 0, 0};
sock = THREAD_FD(thread);
vty = THREAD_ARG(thread);
if ((nbytes = read(sock, buf, VTY_READ_BUFSIZ)) <= 0) {
if (nbytes < 0) {
if (ERRNO_IO_RETRY(errno)) {
vty_event(VTYSH_READ, vty);
return;
}
flog_err(
EC_LIB_SOCKET,
"%s: read failed on vtysh client fd %d, closing: %s",
__func__, sock, safe_strerror(errno));
}
buffer_reset(vty->lbuf);
buffer_reset(vty->obuf);
vty_close(vty);
#ifdef VTYSH_DEBUG
printf("close vtysh\n");
#endif /* VTYSH_DEBUG */
return;
}
#ifdef VTYSH_DEBUG
printf("line: %.*s\n", nbytes, buf);
#endif /* VTYSH_DEBUG */
if (vty->length + nbytes >= VTY_BUFSIZ) {
/* Clear command line buffer. */
vty->cp = vty->length = 0;
vty_clear_buf(vty);
vty_out(vty, "%% Command is too long.\n");
} else {
for (p = buf; p < buf + nbytes; p++) {
vty->buf[vty->length++] = *p;
if (*p == '\0') {
/* Pass this line to parser. */
ret = vty_execute(vty);
/* Note that vty_execute clears the command buffer and resets
vty->length to 0. */
/* Return result. */
#ifdef VTYSH_DEBUG
printf("result: %d\n", ret);
printf("vtysh node: %d\n", vty->node);
#endif /* VTYSH_DEBUG */
if (vty->pass_fd != -1) {
memset(vty->pass_fd_status, 0, 4);
vty->pass_fd_status[3] = ret;
vty->status = VTY_PASSFD;
if (!vty->t_write)
vty_event(VTYSH_WRITE, vty);
/* this introduces a "sequence point"
* command output is written normally,
* read processing is suspended until
* buffer is empty
* then retcode + FD is written
* then normal processing resumes
*
* => skip vty_event(VTYSH_READ, vty)!
*/
return;
}
/* hack for asynchronous "write integrated"
* - other commands in "buf" will be ditched
* - input during pending config-write is
* "unsupported" */
if (ret == CMD_SUSPEND)
break;
/* with new infra we need to stop response till
* we get response through callback.
*/
if (vty->mgmt_req_pending)
return;
/* warning: watchfrr hardcodes this result write
*/
header[3] = ret;
buffer_put(vty->obuf, header, 4);
if (!vty->t_write && (vtysh_flush(vty) < 0))
/* Try to flush results; exit if a write
* error occurs. */
return;
}
}
}
if (vty->status == VTY_CLOSE)
vty_close(vty);
else
vty_event(VTYSH_READ, vty);
}
static void vtysh_write(struct event *thread)
{
struct vty *vty = THREAD_ARG(thread);
vtysh_flush(vty);
}
#endif /* VTYSH */
/* Determine address family to bind. */
void vty_serv_sock(const char *addr, unsigned short port, const char *path)
{
/* If port is set to 0, do not listen on TCP/IP at all! */
if (port)
vty_serv_sock_addrinfo(addr, port);
#ifdef VTYSH
vty_serv_un(path);
#endif /* VTYSH */
}
static void vty_error_delete(void *arg)
{
struct vty_error *ve = arg;
XFREE(MTYPE_TMP, ve);
}
/* Close vty interface. Warning: call this only from functions that
will be careful not to access the vty afterwards (since it has
now been freed). This is safest from top-level functions (called
directly by the thread dispatcher). */
void vty_close(struct vty *vty)
{
int i;
bool was_stdio = false;
if (mgmt_lib_hndl) {
mgmt_fe_destroy_client_session(mgmt_lib_hndl,
vty->mgmt_client_id);
vty->mgmt_session_id = 0;
}
/* Drop out of configure / transaction if needed. */
vty_config_exit(vty);
/* Cancel threads.*/
THREAD_OFF(vty->t_read);
THREAD_OFF(vty->t_write);
THREAD_OFF(vty->t_timeout);
if (vty->pass_fd != -1) {
close(vty->pass_fd);
vty->pass_fd = -1;
}
zlog_live_close(&vty->live_log);
/* Flush buffer. */
buffer_flush_all(vty->obuf, vty->wfd);
/* Free input buffer. */
buffer_free(vty->obuf);
buffer_free(vty->lbuf);
/* Free command history. */
for (i = 0; i < VTY_MAXHIST; i++) {
XFREE(MTYPE_VTY_HIST, vty->hist[i]);
}
/* Unset vector. */
if (vty->fd != -1) {
if (vty->type == VTY_SHELL_SERV)
vtys_del(vtysh_sessions, vty);
else
vtys_del(vty_sessions, vty);
}
if (vty->wfd > 0 && vty->type == VTY_FILE)
fsync(vty->wfd);
/* Close socket.
* note check is for fd > STDERR_FILENO, not fd != -1.
* We never close stdin/stdout/stderr here, because we may be
* running in foreground mode with logging to stdout. Also,
* additionally, we'd need to replace these fds with /dev/null. */
if (vty->wfd > STDERR_FILENO && vty->wfd != vty->fd)
close(vty->wfd);
if (vty->fd > STDERR_FILENO)
close(vty->fd);
if (vty->fd == STDIN_FILENO)
was_stdio = true;
XFREE(MTYPE_VTY, vty->buf);
if (vty->error) {
vty->error->del = vty_error_delete;
list_delete(&vty->error);
}
/* OK free vty. */
XFREE(MTYPE_VTY, vty);
if (was_stdio)
vty_stdio_reset(0);
}
/* When time out occur output message then close connection. */
static void vty_timeout(struct event *thread)
{
struct vty *vty;
vty = THREAD_ARG(thread);
vty->v_timeout = 0;
/* Clear buffer*/
buffer_reset(vty->lbuf);
buffer_reset(vty->obuf);
vty_out(vty, "\nVty connection is timed out.\n");
/* Close connection. */
vty->status = VTY_CLOSE;
vty_close(vty);
}
/* Read up configuration file from file_name. */
static void vty_read_file(struct nb_config *config, FILE *confp)
{
int ret;
struct vty *vty;
struct vty_error *ve;
struct listnode *node;
unsigned int line_num = 0;
vty = vty_new();
/* vty_close won't close stderr; if some config command prints
* something it'll end up there. (not ideal; it'd be better if output
* from a file-load went to logging instead. Also note that if this
* function is called after daemonizing, stderr will be /dev/null.)
*
* vty->fd will be -1 from vty_new()
*/
vty->wfd = STDERR_FILENO;
vty->type = VTY_FILE;
vty->node = CONFIG_NODE;
vty->config = true;
if (config)
vty->candidate_config = config;
else {
vty->private_config = true;
vty->candidate_config = nb_config_new(NULL);
}
/* Execute configuration file */
ret = config_from_file(vty, confp, &line_num);
/* Flush any previous errors before printing messages below */
buffer_flush_all(vty->obuf, vty->wfd);
if (!((ret == CMD_SUCCESS) || (ret == CMD_ERR_NOTHING_TODO))) {
const char *message = NULL;
char *nl;
switch (ret) {
case CMD_ERR_AMBIGUOUS:
message = "Ambiguous command";
break;
case CMD_ERR_NO_MATCH:
message = "No such command";
break;
case CMD_WARNING:
message = "Command returned Warning";
break;
case CMD_WARNING_CONFIG_FAILED:
message = "Command returned Warning Config Failed";
break;
case CMD_ERR_INCOMPLETE:
message = "Command returned Incomplete";
break;
case CMD_ERR_EXEED_ARGC_MAX:
message =
"Command exceeded maximum number of Arguments";
break;
default:
message = "Command returned unhandled error message";
break;
}
for (ALL_LIST_ELEMENTS_RO(vty->error, node, ve)) {
nl = strchr(ve->error_buf, '\n');
if (nl)
*nl = '\0';
flog_err(EC_LIB_VTY, "%s on config line %u: %s",
message, ve->line_num, ve->error_buf);
}
}
/*
* Automatically commit the candidate configuration after
* reading the configuration file.
*/
if (config == NULL) {
struct nb_context context = {};
char errmsg[BUFSIZ] = {0};
context.client = NB_CLIENT_CLI;
context.user = vty;
ret = nb_candidate_commit(context, vty->candidate_config, true,
"Read configuration file", NULL,
errmsg, sizeof(errmsg));
if (ret != NB_OK && ret != NB_ERR_NO_CHANGES)
zlog_err(
"%s: failed to read configuration file: %s (%s)",
__func__, nb_err_name(ret), errmsg);
}
vty_close(vty);
}
static FILE *vty_use_backup_config(const char *fullpath)
{
char *fullpath_sav, *fullpath_tmp;
FILE *ret = NULL;
int tmp, sav;
int c;
char buffer[512];
size_t fullpath_sav_sz = strlen(fullpath) + strlen(CONF_BACKUP_EXT) + 1;
fullpath_sav = malloc(fullpath_sav_sz);
strlcpy(fullpath_sav, fullpath, fullpath_sav_sz);
strlcat(fullpath_sav, CONF_BACKUP_EXT, fullpath_sav_sz);
sav = open(fullpath_sav, O_RDONLY);
if (sav < 0) {
free(fullpath_sav);
return NULL;
}
fullpath_tmp = malloc(strlen(fullpath) + 8);
snprintf(fullpath_tmp, strlen(fullpath) + 8, "%s.XXXXXX", fullpath);
/* Open file to configuration write. */
tmp = mkstemp(fullpath_tmp);
if (tmp < 0)
goto out_close_sav;
if (fchmod(tmp, CONFIGFILE_MASK) != 0)
goto out_close;
while ((c = read(sav, buffer, 512)) > 0) {
if (write(tmp, buffer, c) <= 0)
goto out_close;
}
close(sav);
close(tmp);
if (rename(fullpath_tmp, fullpath) == 0)
ret = fopen(fullpath, "r");
else
unlink(fullpath_tmp);
if (0) {
out_close:
close(tmp);
unlink(fullpath_tmp);
out_close_sav:
close(sav);
}
free(fullpath_sav);
free(fullpath_tmp);
return ret;
}
/* Read up configuration file from file_name. */
bool vty_read_config(struct nb_config *config, const char *config_file,
char *config_default_dir)
{
char cwd[MAXPATHLEN];
FILE *confp = NULL;
const char *fullpath;
char *tmp = NULL;
bool read_success = false;
/* If -f flag specified. */
if (config_file != NULL) {
if (!IS_DIRECTORY_SEP(config_file[0])) {
if (getcwd(cwd, MAXPATHLEN) == NULL) {
flog_err_sys(
EC_LIB_SYSTEM_CALL,
"%s: failure to determine Current Working Directory %d!",
__func__, errno);
goto tmp_free_and_out;
}
size_t tmp_len = strlen(cwd) + strlen(config_file) + 2;
tmp = XMALLOC(MTYPE_TMP, tmp_len);
snprintf(tmp, tmp_len, "%s/%s", cwd, config_file);
fullpath = tmp;
} else
fullpath = config_file;
confp = fopen(fullpath, "r");
if (confp == NULL) {
flog_warn(
EC_LIB_BACKUP_CONFIG,
"%s: failed to open configuration file %s: %s, checking backup",
__func__, fullpath, safe_strerror(errno));
confp = vty_use_backup_config(fullpath);
if (confp)
flog_warn(EC_LIB_BACKUP_CONFIG,
"using backup configuration file!");
else {
flog_err(
EC_LIB_VTY,
"%s: can't open configuration file [%s]",
__func__, config_file);
goto tmp_free_and_out;
}
}
} else {
host_config_set(config_default_dir);
#ifdef VTYSH
int ret;
struct stat conf_stat;
/* !!!!PLEASE LEAVE!!!!
* This is NEEDED for use with vtysh -b, or else you can get
* a real configuration food fight with a lot garbage in the
* merged configuration file it creates coming from the per
* daemon configuration files. This also allows the daemons
* to start if there default configuration file is not
* present or ignore them, as needed when using vtysh -b to
* configure the daemons at boot - MAG
*/
/* Stat for vtysh Zebra.conf, if found startup and wait for
* boot configuration
*/
if (strstr(config_default_dir, "vtysh") == NULL) {
ret = stat(integrate_default, &conf_stat);
if (ret >= 0) {
read_success = true;
goto tmp_free_and_out;
}
}
#endif /* VTYSH */
confp = fopen(config_default_dir, "r");
if (confp == NULL) {
flog_err(
EC_LIB_SYSTEM_CALL,
"%s: failed to open configuration file %s: %s, checking backup",
__func__, config_default_dir,
safe_strerror(errno));
confp = vty_use_backup_config(config_default_dir);
if (confp) {
flog_warn(EC_LIB_BACKUP_CONFIG,
"using backup configuration file!");
fullpath = config_default_dir;
} else {
flog_err(EC_LIB_VTY,
"can't open configuration file [%s]",
config_default_dir);
goto tmp_free_and_out;
}
} else
fullpath = config_default_dir;
}
vty_read_file(config, confp);
read_success = true;
fclose(confp);
host_config_set(fullpath);
tmp_free_and_out:
XFREE(MTYPE_TMP, tmp);
return read_success;
}
static void update_xpath(struct vty *vty, const char *oldpath,
const char *newpath)
{
int i;
for (i = 0; i < vty->xpath_index; i++) {
if (!frrstr_startswith(vty->xpath[i], oldpath))
break;
char *tmp = frrstr_replace(vty->xpath[i], oldpath, newpath);
strlcpy(vty->xpath[i], tmp, sizeof(vty->xpath[0]));
XFREE(MTYPE_TMP, tmp);
}
}
void vty_update_xpath(const char *oldpath, const char *newpath)
{
struct vty *vty;
frr_each (vtys, vtysh_sessions, vty)
update_xpath(vty, oldpath, newpath);
frr_each (vtys, vty_sessions, vty)
update_xpath(vty, oldpath, newpath);
}
int vty_config_enter(struct vty *vty, bool private_config, bool exclusive)
{
if (exclusive && nb_running_lock(NB_CLIENT_CLI, vty)) {
vty_out(vty, "%% Configuration is locked by other client\n");
return CMD_WARNING;
}
if (vty_mgmt_fe_enabled()) {
if (!mgmt_candidate_ds_wr_locked) {
if (vty_mgmt_send_lockds_req(vty, MGMTD_DS_CANDIDATE,
true) != 0) {
vty_out(vty, "Not able to lock candidate DS\n");
return CMD_WARNING;
}
} else {
vty_out(vty,
"Candidate DS already locked by different session\n");
return CMD_WARNING;
}
vty->mgmt_locked_candidate_ds = true;
mgmt_candidate_ds_wr_locked = true;
}
vty->node = CONFIG_NODE;
vty->config = true;
vty->private_config = private_config;
vty->xpath_index = 0;
if (private_config) {
vty->candidate_config = nb_config_dup(running_config);
vty->candidate_config_base = nb_config_dup(running_config);
vty_out(vty,
"Warning: uncommitted changes will be discarded on exit.\n\n");
} else {
/*
* NOTE: On the MGMTD daemon we point the VTY candidate DS to
* the global MGMTD candidate DS. Else we point to the VTY
* Shared Candidate Config.
*/
vty->candidate_config = vty_mgmt_candidate_config
? vty_mgmt_candidate_config
: vty_shared_candidate_config;
if (frr_get_cli_mode() == FRR_CLI_TRANSACTIONAL)
vty->candidate_config_base =
nb_config_dup(running_config);
}
return CMD_SUCCESS;
}
void vty_config_exit(struct vty *vty)
{
enum node_type node = vty->node;
struct cmd_node *cnode;
/* unlock and jump up to ENABLE_NODE if -and only if- we're
* somewhere below CONFIG_NODE */
while (node && node != CONFIG_NODE) {
cnode = vector_lookup(cmdvec, node);
node = cnode->parent_node;
}
if (node != CONFIG_NODE)
/* called outside config, e.g. vty_close() in ENABLE_NODE */
return;
while (vty->node != ENABLE_NODE)
/* will call vty_config_node_exit() below */
cmd_exit(vty);
}
int vty_config_node_exit(struct vty *vty)
{
vty->xpath_index = 0;
if (vty_mgmt_fe_enabled() && mgmt_candidate_ds_wr_locked &&
vty->mgmt_locked_candidate_ds) {
if (vty_mgmt_send_lockds_req(vty, MGMTD_DS_CANDIDATE, false) !=
0) {
vty_out(vty, "Not able to unlock candidate DS\n");
return CMD_WARNING;
}
vty->mgmt_locked_candidate_ds = false;
mgmt_candidate_ds_wr_locked = false;
}
/* Perform any pending commits. */
(void)nb_cli_pending_commit_check(vty);
/* Check if there's a pending confirmed commit. */
if (vty->t_confirmed_commit_timeout) {
vty_out(vty,
"exiting with a pending confirmed commit. Rolling back to previous configuration.\n\n");
nb_cli_confirmed_commit_rollback(vty);
nb_cli_confirmed_commit_clean(vty);
}
(void)nb_running_unlock(NB_CLIENT_CLI, vty);
if (vty->candidate_config) {
if (vty->private_config)
nb_config_free(vty->candidate_config);
vty->candidate_config = NULL;
}
if (vty->candidate_config_base) {
nb_config_free(vty->candidate_config_base);
vty->candidate_config_base = NULL;
}
vty->config = false;
return 1;
}
/* Master of the threads. */
static struct thread_master *vty_master;
static void vty_event_serv(enum vty_event event, struct vty_serv *vty_serv)
{
switch (event) {
case VTY_SERV:
event_add_read(vty_master, vty_accept, vty_serv, vty_serv->sock,
&vty_serv->t_accept);
break;
#ifdef VTYSH
case VTYSH_SERV:
event_add_read(vty_master, vtysh_accept, vty_serv,
vty_serv->sock, &vty_serv->t_accept);
break;
#endif /* VTYSH */
case VTY_READ:
case VTY_WRITE:
case VTY_TIMEOUT_RESET:
case VTYSH_READ:
case VTYSH_WRITE:
assert(!"vty_event_serv() called incorrectly");
}
}
static void vty_event(enum vty_event event, struct vty *vty)
{
switch (event) {
#ifdef VTYSH
case VTYSH_READ:
event_add_read(vty_master, vtysh_read, vty, vty->fd,
&vty->t_read);
break;
case VTYSH_WRITE:
event_add_write(vty_master, vtysh_write, vty, vty->wfd,
&vty->t_write);
break;
#endif /* VTYSH */
case VTY_READ:
event_add_read(vty_master, vty_read, vty, vty->fd,
&vty->t_read);
/* Time out treatment. */
if (vty->v_timeout) {
THREAD_OFF(vty->t_timeout);
event_add_timer(vty_master, vty_timeout, vty,
vty->v_timeout, &vty->t_timeout);
}
break;
case VTY_WRITE:
event_add_write(vty_master, vty_flush, vty, vty->wfd,
&vty->t_write);
break;
case VTY_TIMEOUT_RESET:
THREAD_OFF(vty->t_timeout);
if (vty->v_timeout)
event_add_timer(vty_master, vty_timeout, vty,
vty->v_timeout, &vty->t_timeout);
break;
case VTY_SERV:
case VTYSH_SERV:
assert(!"vty_event() called incorrectly");
}
}
DEFUN_NOSH (config_who,
config_who_cmd,
"who",
"Display who is on vty\n")
{
struct vty *v;
frr_each (vtys, vty_sessions, v)
vty_out(vty, "%svty[%d] connected from %s%s.\n",
v->config ? "*" : " ", v->fd, v->address,
zlog_live_is_null(&v->live_log) ? "" : ", live log");
return CMD_SUCCESS;
}
/* Move to vty configuration mode. */
DEFUN_NOSH (line_vty,
line_vty_cmd,
"line vty",
"Configure a terminal line\n"
"Virtual terminal\n")
{
vty->node = VTY_NODE;
return CMD_SUCCESS;
}
/* Set time out value. */
static int exec_timeout(struct vty *vty, const char *min_str,
const char *sec_str)
{
unsigned long timeout = 0;
/* min_str and sec_str are already checked by parser. So it must be
all digit string. */
if (min_str) {
timeout = strtol(min_str, NULL, 10);
timeout *= 60;
}
if (sec_str)
timeout += strtol(sec_str, NULL, 10);
vty_timeout_val = timeout;
vty->v_timeout = timeout;
vty_event(VTY_TIMEOUT_RESET, vty);
return CMD_SUCCESS;
}
DEFUN (exec_timeout_min,
exec_timeout_min_cmd,
"exec-timeout (0-35791)",
"Set timeout value\n"
"Timeout value in minutes\n")
{
int idx_number = 1;
return exec_timeout(vty, argv[idx_number]->arg, NULL);
}
DEFUN (exec_timeout_sec,
exec_timeout_sec_cmd,
"exec-timeout (0-35791) (0-2147483)",
"Set the EXEC timeout\n"
"Timeout in minutes\n"
"Timeout in seconds\n")
{
int idx_number = 1;
int idx_number_2 = 2;
return exec_timeout(vty, argv[idx_number]->arg,
argv[idx_number_2]->arg);
}
DEFUN (no_exec_timeout,
no_exec_timeout_cmd,
"no exec-timeout",
NO_STR
"Set the EXEC timeout\n")
{
return exec_timeout(vty, NULL, NULL);
}
/* Set vty access class. */
DEFUN (vty_access_class,
vty_access_class_cmd,
"access-class WORD",
"Filter connections based on an IP access list\n"
"IP access list\n")
{
int idx_word = 1;
if (vty_accesslist_name)
XFREE(MTYPE_VTY, vty_accesslist_name);
vty_accesslist_name = XSTRDUP(MTYPE_VTY, argv[idx_word]->arg);
return CMD_SUCCESS;
}
/* Clear vty access class. */
DEFUN (no_vty_access_class,
no_vty_access_class_cmd,
"no access-class [WORD]",
NO_STR
"Filter connections based on an IP access list\n"
"IP access list\n")
{
int idx_word = 2;
const char *accesslist = (argc == 3) ? argv[idx_word]->arg : NULL;
if (!vty_accesslist_name
|| (argc == 3 && strcmp(vty_accesslist_name, accesslist))) {
vty_out(vty, "Access-class is not currently applied to vty\n");
return CMD_WARNING_CONFIG_FAILED;
}
XFREE(MTYPE_VTY, vty_accesslist_name);
vty_accesslist_name = NULL;
return CMD_SUCCESS;
}
/* Set vty access class. */
DEFUN (vty_ipv6_access_class,
vty_ipv6_access_class_cmd,
"ipv6 access-class WORD",
IPV6_STR
"Filter connections based on an IP access list\n"
"IPv6 access list\n")
{
int idx_word = 2;
if (vty_ipv6_accesslist_name)
XFREE(MTYPE_VTY, vty_ipv6_accesslist_name);
vty_ipv6_accesslist_name = XSTRDUP(MTYPE_VTY, argv[idx_word]->arg);
return CMD_SUCCESS;
}
/* Clear vty access class. */
DEFUN (no_vty_ipv6_access_class,
no_vty_ipv6_access_class_cmd,
"no ipv6 access-class [WORD]",
NO_STR
IPV6_STR
"Filter connections based on an IP access list\n"
"IPv6 access list\n")
{
int idx_word = 3;
const char *accesslist = (argc == 4) ? argv[idx_word]->arg : NULL;
if (!vty_ipv6_accesslist_name
|| (argc == 4 && strcmp(vty_ipv6_accesslist_name, accesslist))) {
vty_out(vty,
"IPv6 access-class is not currently applied to vty\n");
return CMD_WARNING_CONFIG_FAILED;
}
XFREE(MTYPE_VTY, vty_ipv6_accesslist_name);
vty_ipv6_accesslist_name = NULL;
return CMD_SUCCESS;
}
/* vty login. */
DEFUN (vty_login,
vty_login_cmd,
"login",
"Enable password checking\n")
{
no_password_check = 0;
return CMD_SUCCESS;
}
DEFUN (no_vty_login,
no_vty_login_cmd,
"no login",
NO_STR
"Enable password checking\n")
{
no_password_check = 1;
return CMD_SUCCESS;
}
DEFUN (service_advanced_vty,
service_advanced_vty_cmd,
"service advanced-vty",
"Set up miscellaneous service\n"
"Enable advanced mode vty interface\n")
{
host.advanced = 1;
return CMD_SUCCESS;
}
DEFUN (no_service_advanced_vty,
no_service_advanced_vty_cmd,
"no service advanced-vty",
NO_STR
"Set up miscellaneous service\n"
"Enable advanced mode vty interface\n")
{
host.advanced = 0;
return CMD_SUCCESS;
}
DEFUN_NOSH(terminal_monitor,
terminal_monitor_cmd,
"terminal monitor [detach]",
"Set terminal line parameters\n"
"Copy debug output to the current terminal line\n"
"Keep logging feed open independent of VTY session\n")
{
int fd_ret = -1;
if (vty->type != VTY_SHELL_SERV) {
vty_out(vty, "%% not supported\n");
return CMD_WARNING;
}
if (argc == 3) {
struct zlog_live_cfg detach_log = {};
zlog_live_open(&detach_log, LOG_DEBUG, &fd_ret);
zlog_live_disown(&detach_log);
} else
zlog_live_open(&vty->live_log, LOG_DEBUG, &fd_ret);
if (fd_ret == -1) {
vty_out(vty, "%% error opening live log: %m\n");
return CMD_WARNING;
}
vty_pass_fd(vty, fd_ret);
return CMD_SUCCESS;
}
DEFUN_NOSH(no_terminal_monitor,
no_terminal_monitor_cmd,
"no terminal monitor",
NO_STR
"Set terminal line parameters\n"
"Copy debug output to the current terminal line\n")
{
zlog_live_close(&vty->live_log);
return CMD_SUCCESS;
}
DEFUN_NOSH(terminal_no_monitor,
terminal_no_monitor_cmd,
"terminal no monitor",
"Set terminal line parameters\n"
NO_STR
"Copy debug output to the current terminal line\n")
{
return no_terminal_monitor(self, vty, argc, argv);
}
DEFUN_NOSH (show_history,
show_history_cmd,
"show history",
SHOW_STR
"Display the session command history\n")
{
int index;
for (index = vty->hindex + 1; index != vty->hindex;) {
if (index == VTY_MAXHIST) {
index = 0;
continue;
}
if (vty->hist[index] != NULL)
vty_out(vty, " %s\n", vty->hist[index]);
index++;
}
return CMD_SUCCESS;
}
/* vty login. */
DEFPY (log_commands,
log_commands_cmd,
"[no] log commands",
NO_STR
"Logging control\n"
"Log all commands\n")
{
if (no) {
if (do_log_commands_perm) {
vty_out(vty,
"Daemon started with permanent logging turned on for commands, ignoring\n");
return CMD_WARNING;
}
do_log_commands = false;
} else
do_log_commands = true;
return CMD_SUCCESS;
}
/* Display current configuration. */
static int vty_config_write(struct vty *vty)
{
vty_frame(vty, "line vty\n");
if (vty_accesslist_name)
vty_out(vty, " access-class %s\n", vty_accesslist_name);
if (vty_ipv6_accesslist_name)
vty_out(vty, " ipv6 access-class %s\n",
vty_ipv6_accesslist_name);
/* exec-timeout */
if (vty_timeout_val != VTY_TIMEOUT_DEFAULT)
vty_out(vty, " exec-timeout %ld %ld\n", vty_timeout_val / 60,
vty_timeout_val % 60);
/* login */
if (no_password_check)
vty_out(vty, " no login\n");
vty_endframe(vty, "exit\n");
if (do_log_commands)
vty_out(vty, "log commands\n");
vty_out(vty, "!\n");
return CMD_SUCCESS;
}
static int vty_config_write(struct vty *vty);
struct cmd_node vty_node = {
.name = "vty",
.node = VTY_NODE,
.parent_node = CONFIG_NODE,
.prompt = "%s(config-line)# ",
.config_write = vty_config_write,
};
/* Reset all VTY status. */
void vty_reset(void)
{
struct vty *vty;
frr_each_safe (vtys, vty_sessions, vty) {
buffer_reset(vty->lbuf);
buffer_reset(vty->obuf);
vty->status = VTY_CLOSE;
vty_close(vty);
}
vty_timeout_val = VTY_TIMEOUT_DEFAULT;
XFREE(MTYPE_VTY, vty_accesslist_name);
XFREE(MTYPE_VTY, vty_ipv6_accesslist_name);
}
static void vty_save_cwd(void)
{
char *c;
c = getcwd(vty_cwd, sizeof(vty_cwd));
if (!c) {
/*
* At this point if these go wrong, more than likely
* the whole world is coming down around us
* Hence not worrying about it too much.
*/
if (chdir(SYSCONFDIR)) {
flog_err_sys(EC_LIB_SYSTEM_CALL,
"Failure to chdir to %s, errno: %d",
SYSCONFDIR, errno);
exit(-1);
}
if (getcwd(vty_cwd, sizeof(vty_cwd)) == NULL) {
flog_err_sys(EC_LIB_SYSTEM_CALL,
"Failure to getcwd, errno: %d", errno);
exit(-1);
}
}
}
char *vty_get_cwd(void)
{
return vty_cwd;
}
int vty_shell(struct vty *vty)
{
return vty->type == VTY_SHELL ? 1 : 0;
}
int vty_shell_serv(struct vty *vty)
{
return vty->type == VTY_SHELL_SERV ? 1 : 0;
}
void vty_init_vtysh(void)
{
/* currently nothing to do, but likely to have future use */
}
static void vty_mgmt_server_connected(uintptr_t lib_hndl, uintptr_t usr_data,
bool connected)
{
zlog_err("%sGot %sconnected %s MGMTD Frontend Server",
!connected ? "ERROR: " : "", !connected ? "dis: " : "",
!connected ? "from" : "to");
mgmt_fe_connected = connected;
/*
* TODO: Setup or teardown front-end sessions for existing
* VTY connections.
*/
}
static void vty_mgmt_session_created(uintptr_t lib_hndl, uintptr_t usr_data,
uint64_t client_id, bool create,
bool success, uintptr_t session_id,
uintptr_t session_ctx)
{
struct vty *vty;
vty = (struct vty *)session_ctx;
if (!success) {
zlog_err("%s session for client %llu failed!",
create ? "Creating" : "Destroying",
(unsigned long long)client_id);
return;
}
zlog_err("%s session for client %llu successfully!",
create ? "Created" : "Destroyed",
(unsigned long long)client_id);
if (create)
vty->mgmt_session_id = session_id;
}
static void vty_mgmt_ds_lock_notified(uintptr_t lib_hndl, uintptr_t usr_data,
uint64_t client_id, uintptr_t session_id,
uintptr_t session_ctx, uint64_t req_id,
bool lock_ds, bool success,
Mgmtd__DatastoreId ds_id,
char *errmsg_if_any)
{
struct vty *vty;
vty = (struct vty *)session_ctx;
if (!success) {
zlog_err("%socking for DS %u failed! Err: '%s'",
lock_ds ? "L" : "Unl", ds_id, errmsg_if_any);
vty_out(vty, "ERROR: %socking for DS %u failed! Err: '%s'\n",
lock_ds ? "L" : "Unl", ds_id, errmsg_if_any);
} else {
zlog_err("%socked DS %u successfully!", lock_ds ? "L" : "Unl",
ds_id);
}
vty_mgmt_resume_response(vty, success);
}
static void vty_mgmt_set_config_result_notified(
uintptr_t lib_hndl, uintptr_t usr_data, uint64_t client_id,
uintptr_t session_id, uintptr_t session_ctx, uint64_t req_id,
bool success, Mgmtd__DatastoreId ds_id, char *errmsg_if_any)
{
struct vty *vty;
vty = (struct vty *)session_ctx;
if (!success) {
zlog_err(
"SET_CONFIG request for client 0x%llx failed! Error: '%s'",
(unsigned long long)client_id,
errmsg_if_any ? errmsg_if_any : "Unknown");
vty_out(vty, "ERROR: SET_CONFIG request failed! Error: %s\n",
errmsg_if_any ? errmsg_if_any : "Unknown");
} else {
zlog_err(
"SET_CONFIG request for client 0x%llx req-id %llu was successfull!",
(unsigned long long)client_id,
(unsigned long long)req_id);
}
vty_mgmt_resume_response(vty, success);
}
static void vty_mgmt_commit_config_result_notified(
uintptr_t lib_hndl, uintptr_t usr_data, uint64_t client_id,
uintptr_t session_id, uintptr_t session_ctx, uint64_t req_id,
bool success, Mgmtd__DatastoreId src_ds_id,
Mgmtd__DatastoreId dst_ds_id, bool validate_only, char *errmsg_if_any)
{
struct vty *vty;
vty = (struct vty *)session_ctx;
if (!success) {
zlog_err(
"COMMIT_CONFIG request for client 0x%llx failed! Error: '%s'",
(unsigned long long)client_id,
errmsg_if_any ? errmsg_if_any : "Unknown");
vty_out(vty, "ERROR: COMMIT_CONFIG request failed! Error: %s\n",
errmsg_if_any ? errmsg_if_any : "Unknown");
} else {
zlog_err(
"COMMIT_CONFIG request for client 0x%llx req-id %llu was successfull!",
(unsigned long long)client_id,
(unsigned long long)req_id);
if (errmsg_if_any)
vty_out(vty, "MGMTD: %s\n", errmsg_if_any);
}
vty_mgmt_resume_response(vty, success);
}
static enum mgmt_result vty_mgmt_get_data_result_notified(
uintptr_t lib_hndl, uintptr_t usr_data, uint64_t client_id,
uintptr_t session_id, uintptr_t session_ctx, uint64_t req_id,
bool success, Mgmtd__DatastoreId ds_id, Mgmtd__YangData **yang_data,
size_t num_data, int next_key, char *errmsg_if_any)
{
struct vty *vty;
size_t indx;
vty = (struct vty *)session_ctx;
if (!success) {
zlog_err(
"GET_DATA request for client 0x%llx failed! Error: '%s'",
(unsigned long long)client_id,
errmsg_if_any ? errmsg_if_any : "Unknown");
vty_out(vty, "ERROR: GET_DATA request failed! Error: %s\n",
errmsg_if_any ? errmsg_if_any : "Unknown");
vty_mgmt_resume_response(vty, success);
return MGMTD_INTERNAL_ERROR;
}
zlog_debug(
"GET_DATA request for client 0x%llx req-id %llu was successfull!",
(unsigned long long)client_id, (unsigned long long)req_id);
if (req_id != mgmt_last_req_id) {
mgmt_last_req_id = req_id;
vty_out(vty, "[\n");
}
for (indx = 0; indx < num_data; indx++) {
vty_out(vty, " \"%s\": \"%s\"\n", yang_data[indx]->xpath,
yang_data[indx]->value->encoded_str_val);
}
if (next_key < 0) {
vty_out(vty, "]\n");
vty_mgmt_resume_response(vty, success);
}
return MGMTD_SUCCESS;
}
static struct mgmt_fe_client_params client_params = {
.client_connect_notify = vty_mgmt_server_connected,
.client_session_notify = vty_mgmt_session_created,
.lock_ds_notify = vty_mgmt_ds_lock_notified,
.set_config_notify = vty_mgmt_set_config_result_notified,
.commit_config_notify = vty_mgmt_commit_config_result_notified,
.get_data_notify = vty_mgmt_get_data_result_notified,
};
void vty_init_mgmt_fe(void)
{
if (!vty_master) {
zlog_err("Always call vty_mgmt_init_fe() after vty_init()!!");
return;
}
assert(!mgmt_lib_hndl);
snprintf(client_params.name, sizeof(client_params.name), "%s-%lld",
frr_get_progname(), (long long)getpid());
mgmt_lib_hndl = mgmt_fe_client_lib_init(&client_params, vty_master);
assert(mgmt_lib_hndl);
}
bool vty_mgmt_fe_enabled(void)
{
return mgmt_lib_hndl && mgmt_fe_connected ? true : false;
}
int vty_mgmt_send_lockds_req(struct vty *vty, Mgmtd__DatastoreId ds_id,
bool lock)
{
enum mgmt_result ret;
if (mgmt_lib_hndl && vty->mgmt_session_id) {
vty->mgmt_req_id++;
ret = mgmt_fe_lock_ds(mgmt_lib_hndl, vty->mgmt_session_id,
vty->mgmt_req_id, ds_id, lock);
if (ret != MGMTD_SUCCESS) {
zlog_err(
"Failed to send %sLOCK-DS-REQ to MGMTD for req-id %llu.",
lock ? "" : "UN",
(unsigned long long)vty->mgmt_req_id);
vty_out(vty, "Failed to send %sLOCK-DS-REQ to MGMTD!",
lock ? "" : "UN");
return -1;
}
vty->mgmt_req_pending = true;
}
return 0;
}
int vty_mgmt_send_config_data(struct vty *vty)
{
Mgmtd__YangDataValue value[VTY_MAXCFGCHANGES];
Mgmtd__YangData cfg_data[VTY_MAXCFGCHANGES];
Mgmtd__YangCfgDataReq cfg_req[VTY_MAXCFGCHANGES];
Mgmtd__YangCfgDataReq *cfgreq[VTY_MAXCFGCHANGES] = {0};
size_t indx;
int cnt;
bool implicit_commit = false;
if (mgmt_lib_hndl && vty->mgmt_session_id) {
cnt = 0;
for (indx = 0; indx < vty->num_cfg_changes; indx++) {
mgmt_yang_data_init(&cfg_data[cnt]);
if (vty->cfg_changes[indx].value) {
mgmt_yang_data_value_init(&value[cnt]);
value[cnt].encoded_str_val =
(char *)vty->cfg_changes[indx].value;
value[cnt].value_case =
MGMTD__YANG_DATA_VALUE__VALUE_ENCODED_STR_VAL;
cfg_data[cnt].value = &value[cnt];
}
cfg_data[cnt].xpath = vty->cfg_changes[indx].xpath;
mgmt_yang_cfg_data_req_init(&cfg_req[cnt]);
cfg_req[cnt].data = &cfg_data[cnt];
switch (vty->cfg_changes[indx].operation) {
case NB_OP_DESTROY:
cfg_req[cnt].req_type =
MGMTD__CFG_DATA_REQ_TYPE__DELETE_DATA;
break;
case NB_OP_CREATE:
case NB_OP_MODIFY:
case NB_OP_MOVE:
case NB_OP_PRE_VALIDATE:
case NB_OP_APPLY_FINISH:
cfg_req[cnt].req_type =
MGMTD__CFG_DATA_REQ_TYPE__SET_DATA;
break;
case NB_OP_GET_ELEM:
case NB_OP_GET_NEXT:
case NB_OP_GET_KEYS:
case NB_OP_LOOKUP_ENTRY:
case NB_OP_RPC:
assert(!"Invalid type of operation");
break;
default:
assert(!"non-enum value, invalid");
}
cfgreq[cnt] = &cfg_req[cnt];
cnt++;
}
vty->mgmt_req_id++;
implicit_commit = vty_needs_implicit_commit(vty);
if (cnt && mgmt_fe_set_config_data(
mgmt_lib_hndl, vty->mgmt_session_id,
vty->mgmt_req_id, MGMTD_DS_CANDIDATE, cfgreq,
cnt, implicit_commit,
MGMTD_DS_RUNNING) != MGMTD_SUCCESS) {
zlog_err("Failed to send %d Config Xpaths to MGMTD!!",
(int)indx);
return -1;
}
vty->mgmt_req_pending = true;
}
return 0;
}
int vty_mgmt_send_commit_config(struct vty *vty, bool validate_only, bool abort)
{
enum mgmt_result ret;
if (mgmt_lib_hndl && vty->mgmt_session_id) {
vty->mgmt_req_id++;
ret = mgmt_fe_commit_config_data(
mgmt_lib_hndl, vty->mgmt_session_id, vty->mgmt_req_id,
MGMTD_DS_CANDIDATE, MGMTD_DS_RUNNING, validate_only,
abort);
if (ret != MGMTD_SUCCESS) {
zlog_err(
"Failed to send COMMIT-REQ to MGMTD for req-id %llu.",
(unsigned long long)vty->mgmt_req_id);
vty_out(vty, "Failed to send COMMIT-REQ to MGMTD!");
return -1;
}
vty->mgmt_req_pending = true;
vty->mgmt_num_pending_setcfg = 0;
}
return 0;
}
int vty_mgmt_send_get_config(struct vty *vty, Mgmtd__DatastoreId datastore,
const char **xpath_list, int num_req)
{
enum mgmt_result ret;
Mgmtd__YangData yang_data[VTY_MAXCFGCHANGES];
Mgmtd__YangGetDataReq get_req[VTY_MAXCFGCHANGES];
Mgmtd__YangGetDataReq *getreq[VTY_MAXCFGCHANGES];
int i;
vty->mgmt_req_id++;
for (i = 0; i < num_req; i++) {
mgmt_yang_get_data_req_init(&get_req[i]);
mgmt_yang_data_init(&yang_data[i]);
yang_data->xpath = (char *)xpath_list[i];
get_req[i].data = &yang_data[i];
getreq[i] = &get_req[i];
}
ret = mgmt_fe_get_config_data(mgmt_lib_hndl, vty->mgmt_session_id,
vty->mgmt_req_id, datastore, getreq,
num_req);
if (ret != MGMTD_SUCCESS) {
zlog_err("Failed to send GET-CONFIG to MGMTD for req-id %llu.",
(unsigned long long)vty->mgmt_req_id);
vty_out(vty, "Failed to send GET-CONFIG to MGMTD!");
return -1;
}
vty->mgmt_req_pending = true;
return 0;
}
int vty_mgmt_send_get_data(struct vty *vty, Mgmtd__DatastoreId datastore,
const char **xpath_list, int num_req)
{
enum mgmt_result ret;
Mgmtd__YangData yang_data[VTY_MAXCFGCHANGES];
Mgmtd__YangGetDataReq get_req[VTY_MAXCFGCHANGES];
Mgmtd__YangGetDataReq *getreq[VTY_MAXCFGCHANGES];
int i;
vty->mgmt_req_id++;
for (i = 0; i < num_req; i++) {
mgmt_yang_get_data_req_init(&get_req[i]);
mgmt_yang_data_init(&yang_data[i]);
yang_data->xpath = (char *)xpath_list[i];
get_req[i].data = &yang_data[i];
getreq[i] = &get_req[i];
}
ret = mgmt_fe_get_data(mgmt_lib_hndl, vty->mgmt_session_id,
vty->mgmt_req_id, datastore, getreq, num_req);
if (ret != MGMTD_SUCCESS) {
zlog_err("Failed to send GET-DATA to MGMTD for req-id %llu.",
(unsigned long long)vty->mgmt_req_id);
vty_out(vty, "Failed to send GET-DATA to MGMTD!");
return -1;
}
vty->mgmt_req_pending = true;
return 0;
}
/* Install vty's own commands like `who' command. */
void vty_init(struct thread_master *master_thread, bool do_command_logging)
{
/* For further configuration read, preserve current directory. */
vty_save_cwd();
vty_master = master_thread;
atexit(vty_stdio_atexit);
/* Install bgp top node. */
install_node(&vty_node);
install_element(VIEW_NODE, &config_who_cmd);
install_element(VIEW_NODE, &show_history_cmd);
install_element(CONFIG_NODE, &line_vty_cmd);
install_element(CONFIG_NODE, &service_advanced_vty_cmd);
install_element(CONFIG_NODE, &no_service_advanced_vty_cmd);
install_element(CONFIG_NODE, &show_history_cmd);
install_element(CONFIG_NODE, &log_commands_cmd);
if (do_command_logging) {
do_log_commands = true;
do_log_commands_perm = true;
}
install_element(ENABLE_NODE, &terminal_monitor_cmd);
install_element(ENABLE_NODE, &terminal_no_monitor_cmd);
install_element(ENABLE_NODE, &no_terminal_monitor_cmd);
install_default(VTY_NODE);
install_element(VTY_NODE, &exec_timeout_min_cmd);
install_element(VTY_NODE, &exec_timeout_sec_cmd);
install_element(VTY_NODE, &no_exec_timeout_cmd);
install_element(VTY_NODE, &vty_access_class_cmd);
install_element(VTY_NODE, &no_vty_access_class_cmd);
install_element(VTY_NODE, &vty_login_cmd);
install_element(VTY_NODE, &no_vty_login_cmd);
install_element(VTY_NODE, &vty_ipv6_access_class_cmd);
install_element(VTY_NODE, &no_vty_ipv6_access_class_cmd);
}
void vty_terminate(void)
{
struct vty *vty;
struct vty_serv *vtyserv;
if (mgmt_lib_hndl) {
mgmt_fe_client_lib_destroy(mgmt_lib_hndl);
mgmt_lib_hndl = 0;
}
memset(vty_cwd, 0x00, sizeof(vty_cwd));
vty_reset();
/* default state of vty_sessions is initialized & empty. */
vtys_fini(vty_sessions);
vtys_init(vty_sessions);
/* vty_reset() doesn't close vtysh sessions */
frr_each_safe (vtys, vtysh_sessions, vty) {
buffer_reset(vty->lbuf);
buffer_reset(vty->obuf);
vty->status = VTY_CLOSE;
vty_close(vty);
}
vtys_fini(vtysh_sessions);
vtys_init(vtysh_sessions);
while ((vtyserv = vtyservs_pop(vty_servs))) {
THREAD_OFF(vtyserv->t_accept);
close(vtyserv->sock);
XFREE(MTYPE_VTY_SERV, vtyserv);
}
vtyservs_fini(vty_servs);
vtyservs_init(vty_servs);
}
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