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#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include "triton.h"
#include "telnet.h"
#include "cli.h"
#include "log.h"
#define MAX_CMD_ITEMS 100
#define MSG_SYNTAX_ERROR "syntax error\r\n"
#define MSG_INVAL_ERROR "invalid argument\r\n"
#define MSG_UNKNOWN_CMD "command unknown\r\n"
static LIST_HEAD(simple_cmd_list);
static LIST_HEAD(regexp_cmd_list);
void __export cli_register_simple_cmd(struct cli_simple_cmd_t *cmd)
{
list_add_tail(&cmd->entry, &simple_cmd_list);
}
void __export cli_register_simple_cmd2(
int (*exec)(const char *cmd, char * const *fields, int fields_cnt, void *client),
void (*help)(char * const *fields, int fields_cnt, void *client),
int hdr_len,
...
)
{
struct cli_simple_cmd_t *c;
int i;
va_list ap;
va_start(ap, hdr_len);
c = malloc(sizeof(*c));
memset(c, 0, sizeof(*c));
c->exec = exec;
c->help = help;
c->hdr_len = hdr_len;
c->hdr = malloc(hdr_len * sizeof(void*));
for (i = 0; i < hdr_len; i++)
c->hdr[i] = va_arg(ap, char *);
list_add_tail(&c->entry, &simple_cmd_list);
}
void __export cli_register_regexp_cmd(struct cli_regexp_cmd_t *cmd)
{
int err;
cmd->re = pcre_compile2(cmd->pattern, cmd->options, &err, NULL, NULL, NULL);
if (!cmd->re) {
log_emerg("cli: failed to compile regexp %s: %i\n", cmd->pattern, err);
_exit(EXIT_FAILURE);
}
list_add_tail(&cmd->entry, &simple_cmd_list);
}
int __export cli_send(void *client, const char *data)
{
struct client_t *cln = (struct client_t *)client;
return telnet_send(cln, data, strlen(data));
}
int __export cli_sendv(void *client, const char *fmt, ...)
{
struct client_t *cln = (struct client_t *)client;
int r;
va_list ap;
va_start(ap, fmt);
r = telnet_sendv(cln, fmt, ap);
va_end(ap);
return r;
}
static char *skip_word(char *ptr)
{
for(; *ptr; ptr++)
if (*ptr == ' ' || *ptr == '\t' || *ptr == '\n')
break;
return ptr;
}
static char *skip_space(char *ptr)
{
for(; *ptr; ptr++)
if (*ptr != ' ' && *ptr != '\t')
break;
return ptr;
}
static int split(char *buf, char **ptr)
{
int i;
ptr[0] = buf;
for (i = 1; i <= MAX_CMD_ITEMS; i++) {
buf = skip_word(buf);
if (!*buf)
return i;
*buf = 0;
buf = skip_space(buf + 1);
if (!*buf)
return i;
ptr[i] = buf;
}
buf = skip_word(buf);
*buf = 0;
return i;
}
int process_cmd(struct client_t *cln)
{
struct cli_simple_cmd_t *cmd1;
struct cli_regexp_cmd_t *cmd2;
char *f[MAX_CMD_ITEMS];
int r, i, n, found = 0;
n = split((char *)cln->cmdline, f);
if (n >= 1 && !strcmp(f[0], "help")) {
list_for_each_entry(cmd1, &simple_cmd_list, entry)
if (cmd1->help)
cmd1->help(f, n, cln);
list_for_each_entry(cmd2, ®exp_cmd_list, entry)
if (cmd2->help)
cmd1->help(f, n, cln);
return 0;
}
list_for_each_entry(cmd1, &simple_cmd_list, entry) {
if (cmd1->hdr_len && n >= cmd1->hdr_len) {
for (i = 0; i < cmd1->hdr_len; i++) {
if (strcmp(cmd1->hdr[i], f[i]))
break;
}
if (i < cmd1->hdr_len)
continue;
r = cmd1->exec((char *)cln->cmdline, f, n, cln);
switch (r) {
case CLI_CMD_EXIT:
telnet_disconnect(cln);
case CLI_CMD_FAILED:
return -1;
case CLI_CMD_SYNTAX:
telnet_send(cln, MSG_SYNTAX_ERROR, sizeof(MSG_SYNTAX_ERROR));
return 0;
case CLI_CMD_INVAL:
telnet_send(cln, MSG_INVAL_ERROR, sizeof(MSG_INVAL_ERROR));
return 0;
case CLI_CMD_OK:
found = 1;
}
}
}
list_for_each_entry(cmd2, ®exp_cmd_list, entry) {
r = cmd2->exec((char *)cln->cmdline, cln);
switch (r) {
case CLI_CMD_EXIT:
telnet_disconnect(cln);
case CLI_CMD_FAILED:
return -1;
case CLI_CMD_SYNTAX:
if (telnet_send(cln, MSG_SYNTAX_ERROR, sizeof(MSG_SYNTAX_ERROR)))
return -1;
return 0;
case CLI_CMD_OK:
found = 1;
}
}
if (!found) {
if (telnet_send(cln, MSG_UNKNOWN_CMD, sizeof(MSG_UNKNOWN_CMD)))
return -1;
}
return 0;
}
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