int validate_mod(char *choped)
{
int i;
i = 0;
while (choped[i])
{
if (!is_double_mod(choped, &i) && is_mod(choped[i]) && \
ft_strchr(SPECIFIERS, choped[i + 1]) == NULL)
return (-1);
else if (is_double_mod(choped, &i) && \
ft_strchr(SPECIFIERS, choped[i + 2]) == NULL)
return (-1);
i++;
}
return (1);
}
int main(int argc, char **argv)
{
/* pipe descriptors */
int pd_rd[2], pd_wr[2];
pid_t pid;
char *pppd = STD_PPPD_PATH;
char *log_path = STD_LOG_PATH;
char *ip = NULL;
char *mod_name = NULL;
int mod_idx;
int i;
int need_arg = 0;
int mod_argc = 0;
char **mod_argv = NULL;
prog_name = argv[0];
/* parsing arguments */
if (argc < 2)
help(argv[0]);
for (i = 1; i < argc; i++) {
if (need_arg) {
switch (need_arg) {
case ARG_MODULE:
mod_name = argv[i];
break;
case ARG_LOG_PATH:
log_path = argv[i];
break;
default:
fprintf(stderr, "there is internal problem with parsing arguments\n");
return 1;
}
need_arg = 0;
continue;
}
if (argv[i][0] != '-') {
/* <local_ip>:<remote_ip> */
ip = argv[i];
continue;
}
if (!strcmp("-h", argv[i]) || !strcmp("--help", argv[i]))
/* print help and exit */
help(argv[0]);
if (!strcmp("-l", argv[i]) || !strcmp("--list", argv[i]))
/* print list of available modules and exit */
list_mod();
if (!strcmp("-L", argv[i])) {
/* specify file for logging */
need_arg = ARG_LOG_PATH;
continue;
}
if (!strcmp("-m", argv[i])) {
/* choose module */
need_arg = ARG_MODULE;
continue;
}
if (!strcmp("-q", argv[i]) || !strcmp("--quiet", argv[i])) {
/* quiet mode */
quiet = 1;
continue;
}
if (!strcmp("--", argv[i])) {
/* TODO: set pointer to i+1, the rest options are for pppd */
mod_argv = argv + i;
mod_argc = argc - i;
break;
}
/* unrecognized options may be addressed for the module */
}
if (need_arg) {
fprintf(stderr, "incomplete arguments, see %s --help\n", argv[0]);
return 2;
}
/* check whether required arguments are set */
if (!mod_name) {
fprintf(stderr, "you must choose a module, see %s --help\n", argv[0]);
return 2;
}
/* redirect logs to a file */
redirect_logs(log_path);
/* check whether module name is correct */
if ((mod_idx = is_mod(mod_name)) < 0) {
fprintf(stderr, "there isn't such a module: %s\n", mod_name);
return 2;
}
/* create pipes for communication with pppd */
if (pipe(pd_rd) < 0)
err_exit("pipe");
if (pipe(pd_wr) < 0)
err_exit("pipe");
/* exec pppd */
if ((pid = fork()) < 0)
err_exit("fork");
if (!pid) {
if (dup2(pd_rd[1], 1) < 0)
err_exit("dup2");
if (dup2(pd_wr[0], 0) < 0)
err_exit("dup2");
close(pd_rd[0]);
close(pd_rd[1]);
close(pd_wr[0]);
close(pd_wr[1]);
execl(pppd, pppd, "nodetach", "noauth", "notty", "passive", ip, NULL);
err_exit("execl");
}
close(pd_rd[1]);
close(pd_wr[0]);
/* run appropriate module's function */
return mod_tbl[mod_idx].func(mod_argc, mod_argv, pd_rd[0], pd_wr[1]);
}
