struct option *xtables_merge_options(struct option *oldopts,
const struct option *newopts,
unsigned int *option_offset)
{
unsigned int num_old, num_new, i;
struct option *merge;
if (newopts == NULL)
return oldopts;
for (num_old = 0; oldopts[num_old].name; num_old++) ;
for (num_new = 0; newopts[num_new].name; num_new++) ;
xt_params->option_offset += 256;
*option_offset = xt_params->option_offset;
merge = malloc(sizeof(struct option) * (num_new + num_old + 1));
if (merge == NULL)
return NULL;
memcpy(merge, oldopts, num_old * sizeof(struct option));
xtables_free_opts(0); /* Release any old options merged */
for (i = 0; i < num_new; i++) {
merge[num_old + i] = newopts[i];
merge[num_old + i].val += *option_offset;
}
memset(merge + num_old + num_new, 0, sizeof(struct option));
return merge;
}
exit_tryhelp(int status)
{
if (line != -1)
fprintf(stderr, "Error occurred at line: %d\n", line);
fprintf(stderr, "Try `%s -h' or '%s --help' for more information.\n",
prog_name, prog_name);
xtables_free_opts(1);
exit(status);
}
void get_kernel_version(void)
{
static struct utsname uts;
int x = 0, y = 0, z = 0;
if (uname(&uts) == -1) {
fprintf(stderr, "Unable to retrieve kernel version.\n");
xtables_free_opts(1);
exit(1);
}
sscanf(uts.release, "%d.%d.%d", &x, &y, &z);
kernel_version = LINUX_VERSION(x, y, z);
}
struct option *xtables_merge_options(struct option *orig_opts,
struct option *oldopts,
const struct option *newopts,
unsigned int *option_offset)
{
unsigned int num_oold = 0, num_old = 0, num_new = 0, i;
struct option *merge, *mp;
if (newopts == NULL)
return oldopts;
for (num_oold = 0; orig_opts[num_oold].name; num_oold++) ;
if (oldopts != NULL)
for (num_old = 0; oldopts[num_old].name; num_old++) ;
for (num_new = 0; newopts[num_new].name; num_new++) ;
/*
* Since @oldopts also has @orig_opts already (and does so at the
* start), skip these entries.
*/
oldopts += num_oold;
num_old -= num_oold;
merge = malloc(sizeof(*mp) * (num_oold + num_old + num_new + 1));
if (merge == NULL)
return NULL;
/* Let the base options -[ADI...] have precedence over everything */
memcpy(merge, orig_opts, sizeof(*mp) * num_oold);
mp = merge + num_oold;
/* Second, the new options */
xt_params->option_offset += XT_OPTION_OFFSET_SCALE;
*option_offset = xt_params->option_offset;
memcpy(mp, newopts, sizeof(*mp) * num_new);
for (i = 0; i < num_new; ++i, ++mp)
mp->val += *option_offset;
/* Third, the old options */
memcpy(mp, oldopts, sizeof(*mp) * num_old);
mp += num_old;
xtables_free_opts(0);
/* Clear trailing entry */
memset(mp, 0, sizeof(*mp));
return merge;
}
void
xtables_exit_error(enum xtables_exittype status, const char *msg, ...)
{
va_list args;
va_start(args, msg);
fprintf(stderr, "%s v%s: ", prog_name, prog_vers);
vfprintf(stderr, msg, args);
va_end(args);
fprintf(stderr, "\n");
if (status == PARAMETER_PROBLEM)
exit_tryhelp(status);
if (status == VERSION_PROBLEM)
fprintf(stderr,
"Perhaps iptables or your kernel needs to be upgraded.\n");
/* On error paths, make sure that we don't leak memory */
xtables_free_opts(1);
exit(status);
}
static int parse_ipt(struct action_util *a,int *argc_p,
char ***argv_p, int tca_id, struct nlmsghdr *n)
{
struct xtables_target *m = NULL;
struct ipt_entry fw;
struct rtattr *tail;
int c;
int rargc = *argc_p;
char **argv = *argv_p;
int argc = 0, iargc = 0;
char k[16];
int size = 0;
int iok = 0, ok = 0;
__u32 hook = 0, index = 0;
struct option *opts = NULL;
xtables_init_all(&tcipt_globals, NFPROTO_IPV4);
set_lib_dir();
{
int i;
for (i = 0; i < rargc; i++) {
if (NULL == argv[i] || 0 == strcmp(argv[i], "action")) {
break;
}
}
iargc = argc = i;
}
if (argc <= 2) {
fprintf(stderr,"bad arguements to ipt %d vs %d \n", argc, rargc);
return -1;
}
while (1) {
c = getopt_long(argc, argv, "j:", tcipt_globals.opts, NULL);
if (c == -1)
break;
switch (c) {
case 'j':
m = xtables_find_target(optarg, XTF_TRY_LOAD);
if (NULL != m) {
if (0 > build_st(m, NULL)) {
printf(" %s error \n", m->name);
return -1;
}
#if (XTABLES_VERSION_CODE >= 6)
opts = xtables_options_xfrm(tcipt_globals.orig_opts,
tcipt_globals.opts,
m->x6_options,
&m->option_offset);
#else
opts = xtables_merge_options(tcipt_globals.orig_opts,
tcipt_globals.opts,
m->extra_opts,
&m->option_offset);
#endif
if (opts == NULL) {
fprintf(stderr, " failed to find aditional options for target %s\n\n", optarg);
return -1;
} else
tcipt_globals.opts = opts;
} else {
fprintf(stderr," failed to find target %s\n\n", optarg);
return -1;
}
ok++;
break;
default:
memset(&fw, 0, sizeof (fw));
#if (XTABLES_VERSION_CODE >= 6)
if (m != NULL && m->x6_parse != NULL ) {
xtables_option_tpcall(c, argv, 0 , m, NULL);
#else
if (m != NULL && m->parse != NULL ) {
m->parse(c - m->option_offset, argv, 0, &m->tflags,
NULL, &m->t);
#endif
} else {
fprintf(stderr,"failed to find target %s\n\n", optarg);
return -1;
}
ok++;
break;
}
}
if (iargc > optind) {
if (matches(argv[optind], "index") == 0) {
if (get_u32(&index, argv[optind + 1], 10)) {
fprintf(stderr, "Illegal \"index\"\n");
xtables_free_opts(1);
return -1;
}
iok++;
optind += 2;
}
}
if (!ok && !iok) {
fprintf(stderr," ipt Parser BAD!! (%s)\n", *argv);
return -1;
}
/* check that we passed the correct parameters to the target */
#if (XTABLES_VERSION_CODE >= 6)
if (m)
xtables_option_tfcall(m);
#else
if (m && m->final_check)
m->final_check(m->tflags);
#endif
{
struct tcmsg *t = NLMSG_DATA(n);
if (t->tcm_parent != TC_H_ROOT
&& t->tcm_parent == TC_H_MAJ(TC_H_INGRESS)) {
hook = NF_IP_PRE_ROUTING;
} else {
hook = NF_IP_POST_ROUTING;
}
}
tail = NLMSG_TAIL(n);
addattr_l(n, MAX_MSG, tca_id, NULL, 0);
fprintf(stdout, "tablename: %s hook: %s\n ", tname, ipthooks[hook]);
fprintf(stdout, "\ttarget: ");
if (m)
m->print(NULL, m->t, 0);
fprintf(stdout, " index %d\n", index);
if (strlen(tname) > 16) {
size = 16;
k[15] = 0;
} else {
size = 1 + strlen(tname);
}
strncpy(k, tname, size);
addattr_l(n, MAX_MSG, TCA_IPT_TABLE, k, size);
addattr_l(n, MAX_MSG, TCA_IPT_HOOK, &hook, 4);
addattr_l(n, MAX_MSG, TCA_IPT_INDEX, &index, 4);
if (m)
addattr_l(n, MAX_MSG, TCA_IPT_TARG, m->t, m->t->u.target_size);
tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
argc -= optind;
argv += optind;
*argc_p = rargc - iargc;
*argv_p = argv;
optind = 0;
xtables_free_opts(1);
if (m) {
/* Clear flags if target will be used again */
m->tflags = 0;
m->used = 0;
/* Free allocated memory */
if (m->t)
free(m->t);
}
return 0;
}
static int
print_ipt(struct action_util *au,FILE * f, struct rtattr *arg)
{
struct rtattr *tb[TCA_IPT_MAX + 1];
struct xt_entry_target *t = NULL;
struct option *opts = NULL;
if (arg == NULL)
return -1;
xtables_init_all(&tcipt_globals, NFPROTO_IPV4);
set_lib_dir();
parse_rtattr_nested(tb, TCA_IPT_MAX, arg);
if (tb[TCA_IPT_TABLE] == NULL) {
fprintf(f, "[NULL ipt table name ] assuming mangle ");
} else {
fprintf(f, "tablename: %s ",
rta_getattr_str(tb[TCA_IPT_TABLE]));
}
if (tb[TCA_IPT_HOOK] == NULL) {
fprintf(f, "[NULL ipt hook name ]\n ");
return -1;
} else {
__u32 hook;
hook = rta_getattr_u32(tb[TCA_IPT_HOOK]);
fprintf(f, " hook: %s \n", ipthooks[hook]);
}
if (tb[TCA_IPT_TARG] == NULL) {
fprintf(f, "\t[NULL ipt target parameters ] \n");
return -1;
} else {
struct xtables_target *m = NULL;
t = RTA_DATA(tb[TCA_IPT_TARG]);
m = xtables_find_target(t->u.user.name, XTF_TRY_LOAD);
if (NULL != m) {
if (0 > build_st(m, t)) {
fprintf(stderr, " %s error \n", m->name);
return -1;
}
#if (XTABLES_VERSION_CODE >= 6)
opts = xtables_options_xfrm(tcipt_globals.orig_opts,
tcipt_globals.opts,
m->x6_options,
&m->option_offset);
#else
opts = xtables_merge_options(tcipt_globals.orig_opts,
tcipt_globals.opts,
m->extra_opts,
&m->option_offset);
#endif
if (opts == NULL) {
fprintf(stderr, " failed to find aditional options for target %s\n\n", optarg);
return -1;
} else
tcipt_globals.opts = opts;
} else {
fprintf(stderr, " failed to find target %s\n\n",
t->u.user.name);
return -1;
}
fprintf(f, "\ttarget ");
m->print(NULL, m->t, 0);
if (tb[TCA_IPT_INDEX] == NULL) {
fprintf(f, " [NULL ipt target index ]\n");
} else {
__u32 index;
index = rta_getattr_u32(tb[TCA_IPT_INDEX]);
fprintf(f, " \n\tindex %d", index);
}
if (tb[TCA_IPT_CNT]) {
struct tc_cnt *c = RTA_DATA(tb[TCA_IPT_CNT]);;
fprintf(f, " ref %d bind %d", c->refcnt, c->bindcnt);
}
if (show_stats) {
if (tb[TCA_IPT_TM]) {
struct tcf_t *tm = RTA_DATA(tb[TCA_IPT_TM]);
print_tm(f,tm);
}
}
fprintf(f, " \n");
}
xtables_free_opts(1);
return 0;
}
struct action_util xt_action_util = {
.id = "xt",
.parse_aopt = parse_ipt,
.print_aopt = print_ipt,
};
static int
print_ipt(struct action_util *au,FILE * f, struct rtattr *arg)
{
struct rtattr *tb[TCA_IPT_MAX + 1];
struct xt_entry_target *t = NULL;
if (arg == NULL)
return -1;
xtables_init_all(&tcipt_globals, NFPROTO_IPV4);
set_lib_dir();
parse_rtattr_nested(tb, TCA_IPT_MAX, arg);
if (tb[TCA_IPT_TABLE] == NULL) {
fprintf(f, "[NULL ipt table name ] assuming mangle ");
} else {
fprintf(f, "tablename: %s ",
rta_getattr_str(tb[TCA_IPT_TABLE]));
}
if (tb[TCA_IPT_HOOK] == NULL) {
fprintf(f, "[NULL ipt hook name ]\n ");
return -1;
} else {
__u32 hook;
hook = rta_getattr_u32(tb[TCA_IPT_HOOK]);
fprintf(f, " hook: %s \n", ipthooks[hook]);
}
if (tb[TCA_IPT_TARG] == NULL) {
fprintf(f, "\t[NULL ipt target parameters ] \n");
return -1;
} else {
struct xtables_target *m = NULL;
t = RTA_DATA(tb[TCA_IPT_TARG]);
m = xtables_find_target(t->u.user.name, XTF_TRY_LOAD);
if (NULL != m) {
if (0 > build_st(m, t)) {
fprintf(stderr, " %s error \n", m->name);
return -1;
}
tcipt_globals.opts =
xtables_merge_options(
#if (XTABLES_VERSION_CODE >= 6)
tcipt_globals.orig_opts,
#endif
tcipt_globals.opts,
m->extra_opts,
&m->option_offset);
} else {
fprintf(stderr, " failed to find target %s\n\n",
t->u.user.name);
return -1;
}
fprintf(f, "\ttarget ");
m->print(NULL, m->t, 0);
if (tb[TCA_IPT_INDEX] == NULL) {
fprintf(f, " [NULL ipt target index ]\n");
} else {
__u32 index;
index = rta_getattr_u32(tb[TCA_IPT_INDEX]);
fprintf(f, " \n\tindex %d", index);
}
if (tb[TCA_IPT_CNT]) {
struct tc_cnt *c = RTA_DATA(tb[TCA_IPT_CNT]);;
fprintf(f, " ref %d bind %d", c->refcnt, c->bindcnt);
}
if (show_stats) {
if (tb[TCA_IPT_TM]) {
struct tcf_t *tm = RTA_DATA(tb[TCA_IPT_TM]);
print_tm(f,tm);
}
}
fprintf(f, " \n");
}
xtables_free_opts(1);
return 0;
}
static int parse_ipt(struct action_util *a,int *argc_p,
char ***argv_p, int tca_id, struct nlmsghdr *n)
{
struct xtables_target *m = NULL;
struct ipt_entry fw;
struct rtattr *tail;
int c;
int rargc = *argc_p;
char **argv = *argv_p;
int argc = 0, iargc = 0;
char k[16];
int size = 0;
int iok = 0, ok = 0;
__u32 hook = 0, index = 0;
xtables_init_all(&tcipt_globals, NFPROTO_IPV4);
set_lib_dir();
{
int i;
for (i = 0; i < rargc; i++) {
if (NULL == argv[i] || 0 == strcmp(argv[i], "action")) {
break;
}
}
iargc = argc = i;
}
if (argc <= 2) {
fprintf(stderr,"bad arguements to ipt %d vs %d \n", argc, rargc);
return -1;
}
while (1) {
c = getopt_long(argc, argv, "j:", tcipt_globals.opts, NULL);
if (c == -1)
break;
switch (c) {
case 'j':
m = xtables_find_target(optarg, XTF_TRY_LOAD);
if (NULL != m) {
if (0 > build_st(m, NULL)) {
printf(" %s error \n", m->name);
return -1;
}
tcipt_globals.opts =
xtables_merge_options(
#if (XTABLES_VERSION_CODE >= 6)
tcipt_globals.orig_opts,
#endif
tcipt_globals.opts,
m->extra_opts,
&m->option_offset);
} else {
fprintf(stderr," failed to find target %s\n\n", optarg);
return -1;
}
ok++;
break;
default:
memset(&fw, 0, sizeof (fw));
if (m) {
m->parse(c - m->option_offset, argv, 0,
&m->tflags, NULL, &m->t);
} else {
fprintf(stderr," failed to find target %s\n\n", optarg);
return -1;
}
ok++;
break;
}
}
if (iargc > optind) {
if (matches(argv[optind], "index") == 0) {
if (get_u32(&index, argv[optind + 1], 10)) {
fprintf(stderr, "Illegal \"index\"\n");
xtables_free_opts(1);
return -1;
}
iok++;
optind += 2;
}
}
if (!ok && !iok) {
fprintf(stderr," ipt Parser BAD!! (%s)\n", *argv);
return -1;
}
if (m && m->final_check)
m->final_check(m->tflags);
{
struct tcmsg *t = NLMSG_DATA(n);
if (t->tcm_parent != TC_H_ROOT
&& t->tcm_parent == TC_H_MAJ(TC_H_INGRESS)) {
hook = NF_IP_PRE_ROUTING;
} else {
hook = NF_IP_POST_ROUTING;
}
}
tail = NLMSG_TAIL(n);
addattr_l(n, MAX_MSG, tca_id, NULL, 0);
fprintf(stdout, "tablename: %s hook: %s\n ", tname, ipthooks[hook]);
fprintf(stdout, "\ttarget: ");
if (m)
m->print(NULL, m->t, 0);
fprintf(stdout, " index %d\n", index);
if (strlen(tname) > 16) {
size = 16;
k[15] = 0;
} else {
size = 1 + strlen(tname);
}
strncpy(k, tname, size);
addattr_l(n, MAX_MSG, TCA_IPT_TABLE, k, size);
addattr_l(n, MAX_MSG, TCA_IPT_HOOK, &hook, 4);
addattr_l(n, MAX_MSG, TCA_IPT_INDEX, &index, 4);
if (m)
addattr_l(n, MAX_MSG, TCA_IPT_TARG, m->t, m->t->u.target_size);
tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
argc -= optind;
argv += optind;
*argc_p = rargc - iargc;
*argv_p = argv;
optind = 0;
xtables_free_opts(1);
if (m) {
m->tflags = 0;
m->used = 0;
if (m->t)
free(m->t);
}
return 0;
}
int do_commandx(struct nft_handle *h, int argc, char *argv[], char **table,
bool restore)
{
struct iptables_command_state cs;
int verbose = 0;
const char *chain = NULL;
const char *policy = NULL, *newname = NULL;
unsigned int rulenum = 0, command = 0;
int ret = 1;
struct xtables_match *m;
struct xtables_rule_match *matchp;
struct xtables_target *t;
struct xtables_args args = {
.family = h->family,
};
memset(&cs, 0, sizeof(cs));
cs.jumpto = "";
cs.argv = argv;
/* re-set optind to 0 in case do_command4 gets called
* a second time */
optind = 0;
/* clear mflags in case do_command4 gets called a second time
* (we clear the global list of all matches for security)*/
for (m = xtables_matches; m; m = m->next)
m->mflags = 0;
for (t = xtables_targets; t; t = t->next) {
t->tflags = 0;
t->used = 0;
}
/* Suppress error messages: we may add new options if we
demand-load a protocol. */
opterr = 0;
h->ops = nft_family_ops_lookup(h->family);
if (h->ops == NULL)
xtables_error(PARAMETER_PROBLEM, "Unknown family");
opts = xt_params->orig_opts;
while ((cs.c = getopt_long(argc, argv,
"-:A:C:D:R:I:L::S::M:F::Z::N:X::E:P:Vh::o:p:s:d:j:i:fbvnt:m:xc:g:46",
opts, NULL)) != -1) {
switch (cs.c) {
/*
* Command selection
*/
case 'A':
add_command(&command, CMD_APPEND, CMD_NONE,
cs.invert);
chain = optarg;
break;
case 'C':
add_command(&command, CMD_CHECK, CMD_NONE,
cs.invert);
chain = optarg;
break;
case 'D':
add_command(&command, CMD_DELETE, CMD_NONE,
cs.invert);
chain = optarg;
if (optind < argc && argv[optind][0] != '-'
&& argv[optind][0] != '!') {
rulenum = parse_rulenumber(argv[optind++]);
command = CMD_DELETE_NUM;
}
break;
case 'R':
add_command(&command, CMD_REPLACE, CMD_NONE,
cs.invert);
chain = optarg;
if (optind < argc && argv[optind][0] != '-'
&& argv[optind][0] != '!')
rulenum = parse_rulenumber(argv[optind++]);
else
xtables_error(PARAMETER_PROBLEM,
"-%c requires a rule number",
cmd2char(CMD_REPLACE));
break;
case 'I':
add_command(&command, CMD_INSERT, CMD_NONE,
cs.invert);
chain = optarg;
if (optind < argc && argv[optind][0] != '-'
&& argv[optind][0] != '!')
rulenum = parse_rulenumber(argv[optind++]);
else rulenum = 1;
break;
case 'L':
add_command(&command, CMD_LIST,
CMD_ZERO | CMD_ZERO_NUM, cs.invert);
if (optarg) chain = optarg;
else if (optind < argc && argv[optind][0] != '-'
&& argv[optind][0] != '!')
chain = argv[optind++];
if (optind < argc && argv[optind][0] != '-'
&& argv[optind][0] != '!')
rulenum = parse_rulenumber(argv[optind++]);
break;
case 'S':
add_command(&command, CMD_LIST_RULES,
CMD_ZERO|CMD_ZERO_NUM, cs.invert);
if (optarg) chain = optarg;
else if (optind < argc && argv[optind][0] != '-'
&& argv[optind][0] != '!')
chain = argv[optind++];
if (optind < argc && argv[optind][0] != '-'
&& argv[optind][0] != '!')
rulenum = parse_rulenumber(argv[optind++]);
break;
case 'F':
add_command(&command, CMD_FLUSH, CMD_NONE,
cs.invert);
if (optarg) chain = optarg;
else if (optind < argc && argv[optind][0] != '-'
&& argv[optind][0] != '!')
chain = argv[optind++];
break;
case 'Z':
add_command(&command, CMD_ZERO, CMD_LIST|CMD_LIST_RULES,
cs.invert);
if (optarg) chain = optarg;
else if (optind < argc && argv[optind][0] != '-'
&& argv[optind][0] != '!')
chain = argv[optind++];
if (optind < argc && argv[optind][0] != '-'
&& argv[optind][0] != '!') {
rulenum = parse_rulenumber(argv[optind++]);
command = CMD_ZERO_NUM;
}
break;
case 'N':
if (optarg && (*optarg == '-' || *optarg == '!'))
xtables_error(PARAMETER_PROBLEM,
"chain name not allowed to start "
"with `%c'\n", *optarg);
if (xtables_find_target(optarg, XTF_TRY_LOAD))
xtables_error(PARAMETER_PROBLEM,
"chain name may not clash "
"with target name\n");
add_command(&command, CMD_NEW_CHAIN, CMD_NONE,
cs.invert);
chain = optarg;
break;
case 'X':
add_command(&command, CMD_DELETE_CHAIN, CMD_NONE,
cs.invert);
if (optarg) chain = optarg;
else if (optind < argc && argv[optind][0] != '-'
&& argv[optind][0] != '!')
chain = argv[optind++];
break;
case 'E':
add_command(&command, CMD_RENAME_CHAIN, CMD_NONE,
cs.invert);
chain = optarg;
if (optind < argc && argv[optind][0] != '-'
&& argv[optind][0] != '!')
newname = argv[optind++];
else
xtables_error(PARAMETER_PROBLEM,
"-%c requires old-chain-name and "
"new-chain-name",
cmd2char(CMD_RENAME_CHAIN));
break;
case 'P':
add_command(&command, CMD_SET_POLICY, CMD_NONE,
cs.invert);
chain = optarg;
if (optind < argc && argv[optind][0] != '-'
&& argv[optind][0] != '!')
policy = argv[optind++];
else
xtables_error(PARAMETER_PROBLEM,
"-%c requires a chain and a policy",
cmd2char(CMD_SET_POLICY));
break;
case 'h':
if (!optarg)
optarg = argv[optind];
/* iptables -p icmp -h */
if (!cs.matches && cs.protocol)
xtables_find_match(cs.protocol,
XTF_TRY_LOAD, &cs.matches);
exit_printhelp(cs.matches);
/*
* Option selection
*/
case 'p':
set_option(&cs.options, OPT_PROTOCOL, &args.invflags,
cs.invert);
/* Canonicalize into lower case */
for (cs.protocol = optarg; *cs.protocol; cs.protocol++)
*cs.protocol = tolower(*cs.protocol);
cs.protocol = optarg;
args.proto = xtables_parse_protocol(cs.protocol);
if (args.proto == 0 && (args.invflags & XT_INV_PROTO))
xtables_error(PARAMETER_PROBLEM,
"rule would never match protocol");
/* This needs to happen here to parse extensions */
h->ops->proto_parse(&cs, &args);
break;
case 's':
set_option(&cs.options, OPT_SOURCE, &args.invflags,
cs.invert);
args.shostnetworkmask = optarg;
break;
case 'd':
set_option(&cs.options, OPT_DESTINATION,
&args.invflags, cs.invert);
args.dhostnetworkmask = optarg;
break;
#ifdef IPT_F_GOTO
case 'g':
set_option(&cs.options, OPT_JUMP, &args.invflags,
cs.invert);
args.goto_set = true;
cs.jumpto = parse_target(optarg);
break;
#endif
case 'j':
command_jump(&cs);
break;
case 'i':
if (*optarg == '\0')
xtables_error(PARAMETER_PROBLEM,
"Empty interface is likely to be "
"undesired");
set_option(&cs.options, OPT_VIANAMEIN, &args.invflags,
cs.invert);
xtables_parse_interface(optarg,
args.iniface,
args.iniface_mask);
break;
case 'o':
if (*optarg == '\0')
xtables_error(PARAMETER_PROBLEM,
"Empty interface is likely to be "
"undesired");
set_option(&cs.options, OPT_VIANAMEOUT, &args.invflags,
cs.invert);
xtables_parse_interface(optarg,
args.outiface,
args.outiface_mask);
break;
case 'f':
if (args.family == AF_INET6) {
xtables_error(PARAMETER_PROBLEM,
"`-f' is not supported in IPv6, "
"use -m frag instead");
}
set_option(&cs.options, OPT_FRAGMENT, &args.invflags,
cs.invert);
args.flags |= IPT_F_FRAG;
break;
case 'v':
if (!verbose)
set_option(&cs.options, OPT_VERBOSE,
&args.invflags, cs.invert);
verbose++;
break;
case 'm':
command_match(&cs);
break;
case 'n':
set_option(&cs.options, OPT_NUMERIC, &args.invflags,
cs.invert);
break;
case 't':
if (cs.invert)
xtables_error(PARAMETER_PROBLEM,
"unexpected ! flag before --table");
*table = optarg;
break;
case 'x':
set_option(&cs.options, OPT_EXPANDED, &args.invflags,
cs.invert);
break;
case 'V':
if (cs.invert)
printf("Not %s ;-)\n", prog_vers);
else
printf("%s v%s\n",
prog_name, prog_vers);
exit(0);
case 'w':
if (restore) {
xtables_error(PARAMETER_PROBLEM,
"You cannot use `-w' from "
"iptables-restore");
}
break;
case '0':
set_option(&cs.options, OPT_LINENUMBERS,
&args.invflags, cs.invert);
break;
case 'M':
xtables_modprobe_program = optarg;
break;
case 'c':
set_option(&cs.options, OPT_COUNTERS, &args.invflags,
cs.invert);
args.pcnt = optarg;
args.bcnt = strchr(args.pcnt + 1, ',');
if (args.bcnt)
args.bcnt++;
if (!args.bcnt && optind < argc &&
argv[optind][0] != '-' &&
argv[optind][0] != '!')
args.bcnt = argv[optind++];
if (!args.bcnt)
xtables_error(PARAMETER_PROBLEM,
"-%c requires packet and byte counter",
opt2char(OPT_COUNTERS));
if (sscanf(args.pcnt, "%llu", &args.pcnt_cnt) != 1)
xtables_error(PARAMETER_PROBLEM,
"-%c packet counter not numeric",
opt2char(OPT_COUNTERS));
if (sscanf(args.bcnt, "%llu", &args.bcnt_cnt) != 1)
xtables_error(PARAMETER_PROBLEM,
"-%c byte counter not numeric",
opt2char(OPT_COUNTERS));
break;
case '4':
if (args.family != AF_INET)
exit_tryhelp(2);
h->ops = nft_family_ops_lookup(args.family);
break;
case '6':
args.family = AF_INET6;
xtables_set_nfproto(AF_INET6);
h->ops = nft_family_ops_lookup(args.family);
if (h->ops == NULL)
xtables_error(PARAMETER_PROBLEM,
"Unknown family");
break;
case 1: /* non option */
if (optarg[0] == '!' && optarg[1] == '\0') {
if (cs.invert)
xtables_error(PARAMETER_PROBLEM,
"multiple consecutive ! not"
" allowed");
cs.invert = TRUE;
optarg[0] = '\0';
continue;
}
fprintf(stderr, "Bad argument `%s'\n", optarg);
exit_tryhelp(2);
default:
if (command_default(&cs, &xtables_globals) == 1)
/* cf. ip6tables.c */
continue;
break;
}
cs.invert = FALSE;
}
if (strcmp(*table, "nat") == 0 &&
((policy != NULL && strcmp(policy, "DROP") == 0) ||
(cs.jumpto != NULL && strcmp(cs.jumpto, "DROP") == 0)))
xtables_error(PARAMETER_PROBLEM,
"\nThe \"nat\" table is not intended for filtering, "
"the use of DROP is therefore inhibited.\n\n");
for (matchp = cs.matches; matchp; matchp = matchp->next)
xtables_option_mfcall(matchp->match);
if (cs.target != NULL)
xtables_option_tfcall(cs.target);
/* Fix me: must put inverse options checking here --MN */
if (optind < argc)
xtables_error(PARAMETER_PROBLEM,
"unknown arguments found on commandline");
if (!command)
xtables_error(PARAMETER_PROBLEM, "no command specified");
if (cs.invert)
xtables_error(PARAMETER_PROBLEM,
"nothing appropriate following !");
/* Set only if required, needed by xtables-restore */
if (h->family == AF_UNSPEC)
h->family = args.family;
h->ops->post_parse(command, &cs, &args);
if (command == CMD_REPLACE &&
(args.s.naddrs != 1 || args.d.naddrs != 1))
xtables_error(PARAMETER_PROBLEM, "Replacement rule does not "
"specify a unique address");
generic_opt_check(command, cs.options);
if (chain != NULL && strlen(chain) >= XT_EXTENSION_MAXNAMELEN)
xtables_error(PARAMETER_PROBLEM,
"chain name `%s' too long (must be under %u chars)",
chain, XT_EXTENSION_MAXNAMELEN);
if (command == CMD_APPEND
|| command == CMD_DELETE
|| command == CMD_CHECK
|| command == CMD_INSERT
|| command == CMD_REPLACE) {
if (strcmp(chain, "PREROUTING") == 0
|| strcmp(chain, "INPUT") == 0) {
/* -o not valid with incoming packets. */
if (cs.options & OPT_VIANAMEOUT)
xtables_error(PARAMETER_PROBLEM,
"Can't use -%c with %s\n",
opt2char(OPT_VIANAMEOUT),
chain);
}
if (strcmp(chain, "POSTROUTING") == 0
|| strcmp(chain, "OUTPUT") == 0) {
/* -i not valid with outgoing packets */
if (cs.options & OPT_VIANAMEIN)
xtables_error(PARAMETER_PROBLEM,
"Can't use -%c with %s\n",
opt2char(OPT_VIANAMEIN),
chain);
}
/*
* Contrary to what iptables does, we assume that any jumpto
* is a custom chain jumps (if no target is found). Later on,
* nf_table will spot the error if the chain does not exists.
*/
}
switch (command) {
case CMD_APPEND:
ret = add_entry(chain, *table, &cs, 0, h->family,
args.s, args.d, cs.options&OPT_VERBOSE,
h, true);
break;
case CMD_DELETE:
ret = delete_entry(chain, *table, &cs, h->family,
args.s, args.d, cs.options&OPT_VERBOSE, h);
break;
case CMD_DELETE_NUM:
ret = nft_rule_delete_num(h, chain, *table, rulenum - 1, verbose);
break;
case CMD_CHECK:
ret = check_entry(chain, *table, &cs, h->family,
args.s, args.d, cs.options&OPT_VERBOSE, h);
break;
case CMD_REPLACE:
ret = replace_entry(chain, *table, &cs, rulenum - 1,
h->family, args.s, args.d,
cs.options&OPT_VERBOSE, h);
break;
case CMD_INSERT:
ret = add_entry(chain, *table, &cs, rulenum - 1, h->family,
args.s, args.d, cs.options&OPT_VERBOSE, h,
false);
break;
case CMD_FLUSH:
ret = nft_rule_flush(h, chain, *table);
break;
case CMD_ZERO:
ret = nft_chain_zero_counters(h, chain, *table);
break;
case CMD_ZERO_NUM:
ret = nft_rule_zero_counters(h, chain, *table, rulenum - 1);
break;
case CMD_LIST:
case CMD_LIST|CMD_ZERO:
case CMD_LIST|CMD_ZERO_NUM:
ret = list_entries(h, chain, *table,
rulenum,
cs.options&OPT_VERBOSE,
cs.options&OPT_NUMERIC,
cs.options&OPT_EXPANDED,
cs.options&OPT_LINENUMBERS);
if (ret && (command & CMD_ZERO))
ret = nft_chain_zero_counters(h, chain, *table);
if (ret && (command & CMD_ZERO_NUM))
ret = nft_rule_zero_counters(h, chain, *table,
rulenum - 1);
break;
case CMD_LIST_RULES:
case CMD_LIST_RULES|CMD_ZERO:
case CMD_LIST_RULES|CMD_ZERO_NUM:
ret = list_rules(h, chain, *table, rulenum, cs.options&OPT_VERBOSE);
if (ret && (command & CMD_ZERO))
ret = nft_chain_zero_counters(h, chain, *table);
if (ret && (command & CMD_ZERO_NUM))
ret = nft_rule_zero_counters(h, chain, *table,
rulenum - 1);
break;
case CMD_NEW_CHAIN:
ret = nft_chain_user_add(h, chain, *table);
break;
case CMD_DELETE_CHAIN:
ret = nft_chain_user_del(h, chain, *table);
break;
case CMD_RENAME_CHAIN:
ret = nft_chain_user_rename(h, chain, *table, newname);
break;
case CMD_SET_POLICY:
ret = nft_chain_set(h, *table, chain, policy, NULL);
if (ret < 0)
xtables_error(PARAMETER_PROBLEM, "Wrong policy `%s'\n",
policy);
break;
default:
/* We should never reach this... */
exit_tryhelp(2);
}
/* if (verbose > 1)
dump_entries(*handle); */
xtables_rule_matches_free(&cs.matches);
if (h->family == AF_INET) {
free(args.s.addr.v4);
free(args.s.mask.v4);
free(args.d.addr.v4);
free(args.d.mask.v4);
} else if (h->family == AF_INET6) {
free(args.s.addr.v6);
free(args.s.mask.v6);
free(args.d.addr.v6);
free(args.d.mask.v6);
}
xtables_free_opts(1);
return ret;
}
