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Code Issues Releases Wiki Activity

pknock: rename IPT_PKNOCK_* -> XT_PKNOCK_*

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This commit is contained in:
Jan Engelhardt
2009-10-03 00:23:42 +02:00
parent 4a350ddd03
commit f474c7d4d4
3 changed files with 93 additions and 90 deletions
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104
extensions/libxt_pknock.c
View File

@@ -64,7 +64,7 @@ parse_ports(const char *portstring, uint16_t *ports, const char *proto)
if (buffer == NULL)
xtables_error(OTHER_PROBLEM, "strdup failed");
for (cp=buffer, i=0; cp != NULL && i<IPT_PKNOCK_MAX_PORTS; cp=next, i++)
for (cp=buffer, i=0; cp != NULL && i<XT_PKNOCK_MAX_PORTS; cp=next, i++)
{
next=strchr(cp, ',');
if (next != NULL)
@@ -119,7 +119,7 @@ __pknock_parse(int c, char **argv, int invert, unsigned int *flags,
switch (c) {
case 'k': /* --knockports */
if (*flags & IPT_PKNOCK_KNOCKPORT)
if (*flags & XT_PKNOCK_KNOCKPORT)
xtables_error(PARAMETER_PROBLEM, PKNOCK
"cannot use --knockports twice.\n");
@@ -127,93 +127,93 @@ __pknock_parse(int c, char **argv, int invert, unsigned int *flags,
proto = check_proto(pnum, invflags);
info->ports_count = parse_ports(optarg, info->port, proto);
info->option |= IPT_PKNOCK_KNOCKPORT;
*flags |= IPT_PKNOCK_KNOCKPORT;
info->option |= XT_PKNOCK_KNOCKPORT;
*flags |= XT_PKNOCK_KNOCKPORT;
#if DEBUG
printf("ports_count: %d\n", info->ports_count);
#endif
break;
case 't': /* --time */
if (*flags & IPT_PKNOCK_TIME)
if (*flags & XT_PKNOCK_TIME)
xtables_error(PARAMETER_PROBLEM, PKNOCK
"cannot use --time twice.\n");
xtables_check_inverse(argv[optind-1], &invert, &optind, 0);
info->max_time = atoi(optarg);
info->option |= IPT_PKNOCK_TIME;
*flags |= IPT_PKNOCK_TIME;
info->option |= XT_PKNOCK_TIME;
*flags |= XT_PKNOCK_TIME;
break;
case 'n': /* --name */
if (*flags & IPT_PKNOCK_NAME)
if (*flags & XT_PKNOCK_NAME)
xtables_error(PARAMETER_PROBLEM, PKNOCK
"cannot use --name twice.\n");
xtables_check_inverse(argv[optind-1], &invert, &optind, 0);
memset(info->rule_name, 0, IPT_PKNOCK_MAX_BUF_LEN + 1);
strncpy(info->rule_name, optarg, IPT_PKNOCK_MAX_BUF_LEN);
memset(info->rule_name, 0, XT_PKNOCK_MAX_BUF_LEN + 1);
strncpy(info->rule_name, optarg, XT_PKNOCK_MAX_BUF_LEN);
info->rule_name_len = strlen(info->rule_name);
info->option |= IPT_PKNOCK_NAME;
*flags |= IPT_PKNOCK_NAME;
info->option |= XT_PKNOCK_NAME;
*flags |= XT_PKNOCK_NAME;
#if DEBUG
printf("info->rule_name: %s\n", info->rule_name);
#endif
break;
case 'a': /* --opensecret */
if (*flags & IPT_PKNOCK_OPENSECRET)
if (*flags & XT_PKNOCK_OPENSECRET)
xtables_error(PARAMETER_PROBLEM, PKNOCK
"cannot use --opensecret twice.\n");
xtables_check_inverse(argv[optind-1], &invert, &optind, 0);
memset(info->open_secret, 0, IPT_PKNOCK_MAX_PASSWD_LEN + 1);
strncpy(info->open_secret, optarg, IPT_PKNOCK_MAX_PASSWD_LEN);
memset(info->open_secret, 0, XT_PKNOCK_MAX_PASSWD_LEN + 1);
strncpy(info->open_secret, optarg, XT_PKNOCK_MAX_PASSWD_LEN);
info->open_secret_len = strlen(info->open_secret);
info->option |= IPT_PKNOCK_OPENSECRET;
*flags |= IPT_PKNOCK_OPENSECRET;
info->option |= XT_PKNOCK_OPENSECRET;
*flags |= XT_PKNOCK_OPENSECRET;
break;
case 'z': /* --closesecret */
if (*flags & IPT_PKNOCK_CLOSESECRET)
if (*flags & XT_PKNOCK_CLOSESECRET)
xtables_error(PARAMETER_PROBLEM, PKNOCK
"cannot use --closesecret twice.\n");
xtables_check_inverse(argv[optind-1], &invert, &optind, 0);
memset(info->close_secret, 0, IPT_PKNOCK_MAX_PASSWD_LEN + 1);
strncpy(info->close_secret, optarg, IPT_PKNOCK_MAX_PASSWD_LEN);
memset(info->close_secret, 0, XT_PKNOCK_MAX_PASSWD_LEN + 1);
strncpy(info->close_secret, optarg, XT_PKNOCK_MAX_PASSWD_LEN);
info->close_secret_len = strlen(info->close_secret);
info->option |= IPT_PKNOCK_CLOSESECRET;
*flags |= IPT_PKNOCK_CLOSESECRET;
info->option |= XT_PKNOCK_CLOSESECRET;
*flags |= XT_PKNOCK_CLOSESECRET;
break;
case 'c': /* --checkip */
if (*flags & IPT_PKNOCK_CHECKIP)
if (*flags & XT_PKNOCK_CHECKIP)
xtables_error(PARAMETER_PROBLEM, PKNOCK
"cannot use --checkip twice.\n");
xtables_check_inverse(argv[optind-1], &invert, &optind, 0);
info->option |= IPT_PKNOCK_CHECKIP;
*flags |= IPT_PKNOCK_CHECKIP;
info->option |= XT_PKNOCK_CHECKIP;
*flags |= XT_PKNOCK_CHECKIP;
break;
case 'x': /* --strict */
if (*flags & IPT_PKNOCK_STRICT)
if (*flags & XT_PKNOCK_STRICT)
xtables_error(PARAMETER_PROBLEM, PKNOCK
"cannot use --strict twice.\n");
xtables_check_inverse(argv[optind-1], &invert, &optind, 0);
info->option |= IPT_PKNOCK_STRICT;
*flags |= IPT_PKNOCK_STRICT;
info->option |= XT_PKNOCK_STRICT;
*flags |= XT_PKNOCK_STRICT;
break;
default:
@@ -240,42 +240,42 @@ static void pknock_check(unsigned int flags)
if (!flags)
xtables_error(PARAMETER_PROBLEM, PKNOCK "expection an option.\n");
if (!(flags & IPT_PKNOCK_NAME))
if (!(flags & XT_PKNOCK_NAME))
xtables_error(PARAMETER_PROBLEM, PKNOCK
"--name option is required.\n");
if (flags & IPT_PKNOCK_KNOCKPORT) {
if (flags & IPT_PKNOCK_CHECKIP) {
if (flags & XT_PKNOCK_KNOCKPORT) {
if (flags & XT_PKNOCK_CHECKIP) {
xtables_error(PARAMETER_PROBLEM, PKNOCK
"cannot specify --knockports with --checkip.\n");
}
if ((flags & IPT_PKNOCK_OPENSECRET)
&& !(flags & IPT_PKNOCK_CLOSESECRET))
if ((flags & XT_PKNOCK_OPENSECRET)
&& !(flags & XT_PKNOCK_CLOSESECRET))
{
xtables_error(PARAMETER_PROBLEM, PKNOCK
"--opensecret must go with --closesecret.\n");
}
if ((flags & IPT_PKNOCK_CLOSESECRET)
&& !(flags & IPT_PKNOCK_OPENSECRET))
if ((flags & XT_PKNOCK_CLOSESECRET)
&& !(flags & XT_PKNOCK_OPENSECRET))
{
xtables_error(PARAMETER_PROBLEM, PKNOCK
"--closesecret must go with --opensecret.\n");
}
}
if (flags & IPT_PKNOCK_CHECKIP) {
if (flags & IPT_PKNOCK_KNOCKPORT) {
if (flags & XT_PKNOCK_CHECKIP) {
if (flags & XT_PKNOCK_KNOCKPORT) {
xtables_error(PARAMETER_PROBLEM, PKNOCK
"cannot specify --checkip with --knockports.\n");
}
if ((flags & IPT_PKNOCK_OPENSECRET)
|| (flags & IPT_PKNOCK_CLOSESECRET))
if ((flags & XT_PKNOCK_OPENSECRET)
|| (flags & XT_PKNOCK_CLOSESECRET))
{
xtables_error(PARAMETER_PROBLEM, PKNOCK
"cannot specify --opensecret and"
" --closesecret with --checkip.\n");
}
if (flags & IPT_PKNOCK_TIME) {
if (flags & XT_PKNOCK_TIME) {
xtables_error(PARAMETER_PROBLEM, PKNOCK
"cannot specify --time with --checkip.\n");
}
@@ -290,19 +290,19 @@ static void pknock_print(const void *ip,
int i;
printf("pknock ");
if (info->option & IPT_PKNOCK_KNOCKPORT) {
if (info->option & XT_PKNOCK_KNOCKPORT) {
printf("knockports ");
for (i=0; i<info->ports_count; i++)
printf("%s%d", i ? "," : "", info->port[i]);
printf(" ");
}
if (info->option & IPT_PKNOCK_TIME)
if (info->option & XT_PKNOCK_TIME)
printf("time %ld ", (long)info->max_time);
if (info->option & IPT_PKNOCK_NAME)
if (info->option & XT_PKNOCK_NAME)
printf("name %s ", info->rule_name);
if (info->option & IPT_PKNOCK_OPENSECRET)
if (info->option & XT_PKNOCK_OPENSECRET)
printf("opensecret ");
if (info->option & IPT_PKNOCK_CLOSESECRET)
if (info->option & XT_PKNOCK_CLOSESECRET)
printf("closesecret ");
}
@@ -312,23 +312,23 @@ static void pknock_save(const void *ip, const struct xt_entry_match *match)
int i;
const struct xt_pknock_mtinfo *info = (void *)match->data;
if (info->option & IPT_PKNOCK_KNOCKPORT) {
if (info->option & XT_PKNOCK_KNOCKPORT) {
printf("--knockports ");
for (i=0; i<info->ports_count; i++)
printf("%s%d", i ? "," : "", info->port[i]);
printf(" ");
}
if (info->option & IPT_PKNOCK_TIME)
if (info->option & XT_PKNOCK_TIME)
printf("--time %ld ", (long)info->max_time);
if (info->option & IPT_PKNOCK_NAME)
if (info->option & XT_PKNOCK_NAME)
printf("--name %s ", info->rule_name);
if (info->option & IPT_PKNOCK_OPENSECRET)
if (info->option & XT_PKNOCK_OPENSECRET)
printf("--opensecret ");
if (info->option & IPT_PKNOCK_CLOSESECRET)
if (info->option & XT_PKNOCK_CLOSESECRET)
printf("--closesecret ");
if (info->option & IPT_PKNOCK_STRICT)
if (info->option & XT_PKNOCK_STRICT)
printf("--strict ");
if (info->option & IPT_PKNOCK_CHECKIP)
if (info->option & XT_PKNOCK_CHECKIP)
printf("--checkip ");
}

46
extensions/xt_pknock.c
View File

@@ -65,7 +65,7 @@ struct peer {
*/
struct xt_pknock_rule {
struct list_head head;
char rule_name[IPT_PKNOCK_MAX_BUF_LEN + 1];
char rule_name[XT_PKNOCK_MAX_BUF_LEN+1];
int rule_name_len;
unsigned int ref_count;
struct timer_list timer;
@@ -433,7 +433,7 @@ add_rule(struct xt_pknock_mtinfo *info)
if (rulecmp(info, rule)) {
rule->ref_count++;
if (info->option & IPT_PKNOCK_CHECKIP) {
if (info->option & XT_PKNOCK_CHECKIP) {
pr_debug("add_rule() (AC)"
" rule found: %s - "
"ref_count: %d\n",
@@ -452,7 +452,7 @@ add_rule(struct xt_pknock_mtinfo *info)
INIT_LIST_HEAD(&rule->head);
memset(rule->rule_name, 0, IPT_PKNOCK_MAX_BUF_LEN + 1);
memset(rule->rule_name, 0, XT_PKNOCK_MAX_BUF_LEN + 1);
strncpy(rule->rule_name, info->rule_name, info->rule_name_len);
rule->rule_name_len = info->rule_name_len;
@@ -858,7 +858,7 @@ update_peer(struct peer *peer, const struct xt_pknock_mtinfo *info,
if (is_wrong_knock(peer, info, hdr->port)) {
pk_debug("DIDN'T MATCH", peer);
/* Peer must start the sequence from scratch. */
if (info->option & IPT_PKNOCK_STRICT)
if (info->option & XT_PKNOCK_STRICT)
reset_knock_status(peer);
return false;
@@ -866,7 +866,7 @@ update_peer(struct peer *peer, const struct xt_pknock_mtinfo *info,
#ifdef PK_CRYPTO
/* If security is needed. */
if (info->option & IPT_PKNOCK_OPENSECRET ) {
if (info->option & XT_PKNOCK_OPENSECRET ) {
if (hdr->proto != IPPROTO_UDP)
return false;
@@ -894,7 +894,7 @@ update_peer(struct peer *peer, const struct xt_pknock_mtinfo *info,
}
/* Controls the max matching time between ports. */
if (info->option & IPT_PKNOCK_TIME) {
if (info->option & XT_PKNOCK_TIME) {
time = jiffies/HZ;
if (is_time_exceeded(peer, info->max_time)) {
@@ -997,7 +997,7 @@ static bool pknock_mt(const struct sk_buff *skb,
/* Gives the peer matching status added to rule depending on ip src. */
peer = get_peer(rule, iph->saddr);
if (info->option & IPT_PKNOCK_CHECKIP) {
if (info->option & XT_PKNOCK_CHECKIP) {
ret = is_allowed(peer);
goto out;
}
@@ -1008,10 +1008,10 @@ static bool pknock_mt(const struct sk_buff *skb,
}
/* Sets, updates, removes or checks the peer matching status. */
if (info->option & IPT_PKNOCK_KNOCKPORT) {
if (info->option & XT_PKNOCK_KNOCKPORT) {
if ((ret = is_allowed(peer))) {
#ifdef PK_CRYPTO
if (info->option & IPT_PKNOCK_CLOSESECRET &&
if (info->option & XT_PKNOCK_CLOSESECRET &&
iph->protocol == IPPROTO_UDP)
{
if (is_close_knock(peer, info, hdr.payload, hdr.payload_len))
@@ -1059,51 +1059,51 @@ static bool pknock_mt_check(const struct xt_mtchk_param *par)
if (!add_rule(info))
RETURN_ERR("add_rule() error in checkentry() function.\n");
if (!(info->option & IPT_PKNOCK_NAME))
if (!(info->option & XT_PKNOCK_NAME))
RETURN_ERR("You must specify --name option.\n");
#ifdef PK_CRYPTO
if ((info->option & IPT_PKNOCK_OPENSECRET) && (info->ports_count != 1))
if ((info->option & XT_PKNOCK_OPENSECRET) && (info->ports_count != 1))
RETURN_ERR("--opensecret must have just one knock port\n");
#endif
if (info->option & IPT_PKNOCK_KNOCKPORT) {
if (info->option & IPT_PKNOCK_CHECKIP) {
if (info->option & XT_PKNOCK_KNOCKPORT) {
if (info->option & XT_PKNOCK_CHECKIP) {
RETURN_ERR("Can't specify --knockports with --checkip.\n");
}
#ifdef PK_CRYPTO
if ((info->option & IPT_PKNOCK_OPENSECRET) &&
!(info->option & IPT_PKNOCK_CLOSESECRET))
if ((info->option & XT_PKNOCK_OPENSECRET) &&
!(info->option & XT_PKNOCK_CLOSESECRET))
{
RETURN_ERR("--opensecret must go with --closesecret.\n");
}
if ((info->option & IPT_PKNOCK_CLOSESECRET) &&
!(info->option & IPT_PKNOCK_OPENSECRET))
if ((info->option & XT_PKNOCK_CLOSESECRET) &&
!(info->option & XT_PKNOCK_OPENSECRET))
{
RETURN_ERR("--closesecret must go with --opensecret.\n");
}
#endif
}
if (info->option & IPT_PKNOCK_CHECKIP) {
if (info->option & IPT_PKNOCK_KNOCKPORT)
if (info->option & XT_PKNOCK_CHECKIP) {
if (info->option & XT_PKNOCK_KNOCKPORT)
{
RETURN_ERR("Can't specify --checkip with --knockports.\n");
}
#ifdef PK_CRYPTO
if ((info->option & IPT_PKNOCK_OPENSECRET) ||
(info->option & IPT_PKNOCK_CLOSESECRET))
if ((info->option & XT_PKNOCK_OPENSECRET) ||
(info->option & XT_PKNOCK_CLOSESECRET))
{
RETURN_ERR("Can't specify --opensecret and --closesecret"
" with --checkip.\n");
}
#endif
if (info->option & IPT_PKNOCK_TIME)
if (info->option & XT_PKNOCK_TIME)
RETURN_ERR("Can't specify --time with --checkip.\n");
}
#ifdef PK_CRYPTO
if (info->option & IPT_PKNOCK_OPENSECRET) {
if (info->option & XT_PKNOCK_OPENSECRET) {
if (info->open_secret_len == info->close_secret_len) {
if (memcmp(info->open_secret, info->close_secret,
info->open_secret_len) == 0)

33
extensions/xt_pknock.h
View File

@@ -13,35 +13,38 @@
#define PKNOCK "xt_pknock: "
#define IPT_PKNOCK_KNOCKPORT 0x01
#define IPT_PKNOCK_TIME 0x02
#define IPT_PKNOCK_NAME 0x04
#define IPT_PKNOCK_STRICT 0x08
#define IPT_PKNOCK_CHECKIP 0x10
#define IPT_PKNOCK_OPENSECRET 0x20
#define IPT_PKNOCK_CLOSESECRET 0x40
enum {
XT_PKNOCK_KNOCKPORT = 1 << 0,
XT_PKNOCK_TIME = 1 << 1,
XT_PKNOCK_NAME = 1 << 2,
XT_PKNOCK_STRICT = 1 << 3,
XT_PKNOCK_CHECKIP = 1 << 4,
XT_PKNOCK_OPENSECRET = 1 << 5,
XT_PKNOCK_CLOSESECRET = 1 << 6,
#define IPT_PKNOCK_MAX_PORTS 15
#define IPT_PKNOCK_MAX_BUF_LEN 31
#define IPT_PKNOCK_MAX_PASSWD_LEN 31
/* Can never change these, as they are make up the user protocol. */
XT_PKNOCK_MAX_PORTS = 15,
XT_PKNOCK_MAX_BUF_LEN = 31,
XT_PKNOCK_MAX_PASSWD_LEN = 31,
};
#define DEBUG 1
struct xt_pknock_mtinfo {
char rule_name[IPT_PKNOCK_MAX_BUF_LEN + 1];
char rule_name[XT_PKNOCK_MAX_BUF_LEN+1];
uint32_t rule_name_len;
char open_secret[IPT_PKNOCK_MAX_PASSWD_LEN + 1];
char open_secret[XT_PKNOCK_MAX_PASSWD_LEN+1];
uint32_t open_secret_len;
char close_secret[IPT_PKNOCK_MAX_PASSWD_LEN + 1];
char close_secret[XT_PKNOCK_MAX_PASSWD_LEN+1];
uint32_t close_secret_len;
uint8_t option; /* --time, --knock-port, ... */
uint8_t ports_count; /* number of ports */
uint16_t port[IPT_PKNOCK_MAX_PORTS]; /* port[,port,port,...] */
uint16_t port[XT_PKNOCK_MAX_PORTS]; /* port[,port,port,...] */
uint32_t max_time; /* max matching time between ports */
};
struct xt_pknock_nl_msg {
char rule_name[IPT_PKNOCK_MAX_BUF_LEN + 1];
char rule_name[XT_PKNOCK_MAX_BUF_LEN+1];
uint32_t peer_ip;
};