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/* Copyright 2011 Jozsef Kadlecsik (kadlec@blackhole.kfki.hu)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <arpa/inet.h> /* inet_ntop */
#include <libmnl/libmnl.h> /* libmnl backend */
struct ipset_attrname {
const char *name;
};
static const struct ipset_attrname cmdattr2name[] = {
[IPSET_ATTR_PROTOCOL] = { .name = "PROTOCOL" },
[IPSET_ATTR_SETNAME] = { .name = "SETNAME" },
[IPSET_ATTR_TYPENAME] = { .name = "TYPENAME" },
[IPSET_ATTR_REVISION] = { .name = "REVISION" },
[IPSET_ATTR_FAMILY] = { .name = "FAMILY" },
[IPSET_ATTR_FLAGS] = { .name = "FLAGS" },
[IPSET_ATTR_DATA] = { .name = "DATA" },
[IPSET_ATTR_ADT] = { .name = "ADT" },
[IPSET_ATTR_LINENO] = { .name = "LINENO" },
[IPSET_ATTR_PROTOCOL_MIN] = { .name = "PROTO_MIN" },
};
static const struct ipset_attrname createattr2name[] = {
[IPSET_ATTR_IP] = { .name = "IP" },
[IPSET_ATTR_IP_TO] = { .name = "IP_TO" },
[IPSET_ATTR_CIDR] = { .name = "CIDR" },
[IPSET_ATTR_PORT] = { .name = "PORT" },
[IPSET_ATTR_PORT_TO] = { .name = "PORT_TO" },
[IPSET_ATTR_TIMEOUT] = { .name = "TIMEOUT" },
[IPSET_ATTR_PROTO] = { .name = "PROTO" },
[IPSET_ATTR_CADT_FLAGS] = { .name = "CADT_FLAGS" },
[IPSET_ATTR_CADT_LINENO] = { .name = "CADT_LINENO" },
[IPSET_ATTR_GC] = { .name = "GC" },
[IPSET_ATTR_HASHSIZE] = { .name = "HASHSIZE" },
[IPSET_ATTR_MAXELEM] = { .name = "MAXELEM" },
[IPSET_ATTR_MARKMASK] = { .name = "MARKMASK" },
[IPSET_ATTR_NETMASK] = { .name = "NETMASK" },
[IPSET_ATTR_PROBES] = { .name = "PROBES" },
[IPSET_ATTR_RESIZE] = { .name = "RESIZE" },
[IPSET_ATTR_SIZE] = { .name = "SIZE" },
[IPSET_ATTR_ELEMENTS] = { .name = "ELEMENTS" },
[IPSET_ATTR_REFERENCES] = { .name = "REFERENCES" },
[IPSET_ATTR_MEMSIZE] = { .name = "MEMSIZE" },
};
static const struct ipset_attrname adtattr2name[] = {
[IPSET_ATTR_IP] = { .name = "IP" },
[IPSET_ATTR_IP_TO] = { .name = "IP_TO" },
[IPSET_ATTR_CIDR] = { .name = "CIDR" },
[IPSET_ATTR_MARK] = { .name = "MARK" },
[IPSET_ATTR_PORT] = { .name = "PORT" },
[IPSET_ATTR_PORT_TO] = { .name = "PORT_TO" },
[IPSET_ATTR_TIMEOUT] = { .name = "TIMEOUT" },
[IPSET_ATTR_PROTO] = { .name = "PROTO" },
[IPSET_ATTR_CADT_FLAGS] = { .name = "CADT_FLAGS" },
[IPSET_ATTR_CADT_LINENO] = { .name = "CADT_LINENO" },
[IPSET_ATTR_ETHER] = { .name = "ETHER" },
[IPSET_ATTR_NAME] = { .name = "NAME" },
[IPSET_ATTR_NAMEREF] = { .name = "NAMEREF" },
[IPSET_ATTR_IP2] = { .name = "IP2" },
[IPSET_ATTR_CIDR2] = { .name = "CIDR2" },
[IPSET_ATTR_IP2_TO] = { .name = "IP2_TO" },
[IPSET_ATTR_IFACE] = { .name = "IFACE" },
[IPSET_ATTR_COMMENT] = { .name = "COMMENT" },
[IPSET_ATTR_SKBMARK] = { .name = "SKBMARK" },
[IPSET_ATTR_SKBPRIO] = { .name = "SKBPRIO" },
[IPSET_ATTR_SKBQUEUE] = { .name = "SKBQUEUE" },
};
static void
debug_cadt_attrs(int max, const struct ipset_attr_policy *policy,
const struct ipset_attrname attr2name[],
struct nlattr *nla[])
{
uint32_t v;
int i;
fprintf(stderr, "\t\t%s attributes:\n",
policy == create_attrs ? "CREATE" : "ADT");
for (i = IPSET_ATTR_UNSPEC + 1; i <= max; i++) {
if (!nla[i])
continue;
switch (policy[i].type) {
case MNL_TYPE_U8:
v = *(uint8_t *) mnl_attr_get_payload(nla[i]);
fprintf(stderr, "\t\t%s: %u\n",
attr2name[i].name, v);
break;
case MNL_TYPE_U16:
v = *(uint16_t *) mnl_attr_get_payload(nla[i]);
fprintf(stderr, "\t\t%s: %u\n",
attr2name[i].name, ntohs(v));
break;
case MNL_TYPE_U32:
v = *(uint32_t *) mnl_attr_get_payload(nla[i]);
fprintf(stderr, "\t\t%s: %u\n",
attr2name[i].name, ntohl(v));
break;
case MNL_TYPE_U64:
fprintf(stderr, "\t\t%s: 0x%llx\n",
attr2name[i].name, (long long int)
be64toh(*(uint64_t *)
mnl_attr_get_payload(nla[i])));
break;
case MNL_TYPE_NUL_STRING:
fprintf(stderr, "\t\t%s: %s\n",
attr2name[i].name,
(const char *) mnl_attr_get_payload(nla[i]));
break;
case MNL_TYPE_NESTED: {
struct nlattr *ipattr[IPSET_ATTR_IPADDR_MAX+1] = {};
char addr[INET6_ADDRSTRLEN];
void *d;
if (mnl_attr_parse_nested(nla[i], ipaddr_attr_cb,
ipattr) < 0) {
fprintf(stderr,
"\t\tIPADDR: cannot validate "
"and parse attributes\n");
continue;
}
if (ipattr[IPSET_ATTR_IPADDR_IPV4]) {
d = mnl_attr_get_payload(
ipattr[IPSET_ATTR_IPADDR_IPV4]);
inet_ntop(NFPROTO_IPV4, d, addr,
INET6_ADDRSTRLEN);
fprintf(stderr, "\t\t%s: %s\n",
attr2name[i].name, addr);
} else if (ipattr[IPSET_ATTR_IPADDR_IPV6]) {
d = mnl_attr_get_payload(
ipattr[IPSET_ATTR_IPADDR_IPV6]);
inet_ntop(NFPROTO_IPV6, d, addr,
INET6_ADDRSTRLEN);
fprintf(stderr, "\t\t%s: %s\n",
attr2name[i].name, addr);
}
break;
}
default:
fprintf(stderr, "\t\t%s: unresolved!\n",
attr2name[i].name);
}
}
}
static void
debug_cmd_attrs(int cmd, struct nlattr *nla[])
{
struct nlattr *adt[IPSET_ATTR_ADT_MAX+1] = {};
struct nlattr *cattr[IPSET_ATTR_CREATE_MAX+1] = {};
uint32_t v;
int i;
fprintf(stderr, "\tCommand attributes:\n");
for (i = IPSET_ATTR_UNSPEC + 1; i <= IPSET_ATTR_CMD_MAX; i++) {
if (!nla[i])
continue;
switch (cmd_attrs[i].type) {
case MNL_TYPE_U8:
v = *(uint8_t *) mnl_attr_get_payload(nla[i]);
fprintf(stderr, "\t%s: %u\n",
cmdattr2name[i].name, v);
break;
case MNL_TYPE_U16:
v = *(uint16_t *) mnl_attr_get_payload(nla[i]);
fprintf(stderr, "\t%s: %u\n",
cmdattr2name[i].name, ntohs(v));
break;
case MNL_TYPE_U32:
v = *(uint32_t *) mnl_attr_get_payload(nla[i]);
fprintf(stderr, "\t%s: %u\n",
cmdattr2name[i].name, ntohl(v));
break;
case MNL_TYPE_NUL_STRING:
fprintf(stderr, "\t%s: %s\n",
cmdattr2name[i].name,
(const char *) mnl_attr_get_payload(nla[i]));
break;
case MNL_TYPE_NESTED:
if (i == IPSET_ATTR_DATA) {
switch (cmd) {
case IPSET_CMD_ADD:
case IPSET_CMD_DEL:
case IPSET_CMD_TEST:
if (mnl_attr_parse_nested(nla[i],
adt_attr_cb, adt) < 0) {
fprintf(stderr,
"\tADT: cannot validate "
"and parse attributes\n");
continue;
}
debug_cadt_attrs(IPSET_ATTR_ADT_MAX,
adt_attrs,
adtattr2name,
adt);
break;
default:
if (mnl_attr_parse_nested(nla[i],
create_attr_cb,
cattr) < 0) {
fprintf(stderr,
"\tCREATE: cannot validate "
"and parse attributes\n");
continue;
}
debug_cadt_attrs(IPSET_ATTR_CREATE_MAX,
create_attrs,
createattr2name,
cattr);
}
} else {
struct nlattr *tb;
mnl_attr_for_each_nested(tb, nla[i]) {
memset(adt, 0, sizeof(adt));
if (mnl_attr_parse_nested(tb,
adt_attr_cb, adt) < 0) {
fprintf(stderr,
"\tADT: cannot validate "
"and parse attributes\n");
continue;
}
debug_cadt_attrs(IPSET_ATTR_ADT_MAX,
adt_attrs,
adtattr2name,
adt);
}
}
break;
default:
fprintf(stderr, "\t%s: unresolved!\n",
cmdattr2name[i].name);
}
}
}
void
ipset_debug_msg(const char *dir, void *buffer, int len)
{
const struct nlmsghdr *nlh = buffer;
struct nlattr *nla[IPSET_ATTR_CMD_MAX+1] = {};
int cmd, nfmsglen = MNL_ALIGN(sizeof(struct nfgenmsg));
debug = 0;
if (!mnl_nlmsg_ok(nlh, len)) {
fprintf(stderr, "Broken message received!\n");
if (len < (int)sizeof(struct nlmsghdr)) {
fprintf(stderr, "len (%d) < sizeof(struct nlmsghdr) (%d)\n",
len, (int)sizeof(struct nlmsghdr));
} else if (nlh->nlmsg_len < sizeof(struct nlmsghdr)) {
fprintf(stderr, "nlmsg_len (%u) < sizeof(struct nlmsghdr) (%d)\n",
nlh->nlmsg_len, (int)sizeof(struct nlmsghdr));
} else if ((int)nlh->nlmsg_len > len) {
fprintf(stderr, "nlmsg_len (%u) > len (%d)\n",
nlh->nlmsg_len, len);
}
}
while (mnl_nlmsg_ok(nlh, len)) {
switch (nlh->nlmsg_type) {
case NLMSG_NOOP:
case NLMSG_DONE:
case NLMSG_OVERRUN:
fprintf(stderr, "Message header: %s msg %s\n"
"\tlen %d\n"
"\tseq %u\n",
dir,
nlh->nlmsg_type == NLMSG_NOOP ? "NOOP" :
nlh->nlmsg_type == NLMSG_DONE ? "DONE" :
"OVERRUN",
len, nlh->nlmsg_seq);
goto next_msg;
case NLMSG_ERROR: {
const struct nlmsgerr *err = mnl_nlmsg_get_payload(nlh);
fprintf(stderr, "Message header: %s msg ERROR\n"
"\tlen %d\n"
"\terrcode %d\n"
"\tseq %u\n",
dir, len, err->error, nlh->nlmsg_seq);
goto next_msg;
}
default:
;
}
cmd = ipset_get_nlmsg_type(nlh);
fprintf(stderr, "Message header: %s cmd %s (%d)\n"
"\tlen %d\n"
"\tflag %s\n"
"\tseq %u\n",
dir,
cmd <= IPSET_CMD_NONE ? "NONE!" :
cmd >= IPSET_CMD_MAX ? "MAX!" : cmd2name[cmd], cmd,
len,
!(nlh->nlmsg_flags & NLM_F_EXCL) ? "EXIST" : "none",
nlh->nlmsg_seq);
if (cmd <= IPSET_CMD_NONE || cmd >= IPSET_CMD_MAX)
goto next_msg;
memset(nla, 0, sizeof(nla));
if (mnl_attr_parse(nlh, nfmsglen,
cmd_attr_cb, nla) < MNL_CB_STOP) {
fprintf(stderr, "\tcannot validate "
"and parse attributes\n");
goto next_msg;
}
debug_cmd_attrs(cmd, nla);
next_msg:
nlh = mnl_nlmsg_next(nlh, &len);
}
debug = 1;
}
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