static int nftnl_expr_target_parse(struct nftnl_expr *e, struct nlattr *attr)
{
struct nftnl_expr_target *target = nftnl_expr_data(e);
struct nlattr *tb[NFTA_TARGET_MAX+1] = {};
if (mnl_attr_parse_nested(attr, nftnl_expr_target_cb, tb) < 0)
return -1;
if (tb[NFTA_TARGET_NAME]) {
snprintf(target->name, XT_EXTENSION_MAXNAMELEN, "%s",
mnl_attr_get_str(tb[NFTA_TARGET_NAME]));
target->name[XT_EXTENSION_MAXNAMELEN-1] = '\0';
e->flags |= (1 << NFTNL_EXPR_TG_NAME);
}
if (tb[NFTA_TARGET_REV]) {
target->rev = ntohl(mnl_attr_get_u32(tb[NFTA_TARGET_REV]));
e->flags |= (1 << NFTNL_EXPR_TG_REV);
}
if (tb[NFTA_TARGET_INFO]) {
uint32_t len = mnl_attr_get_payload_len(tb[NFTA_TARGET_INFO]);
void *target_data;
if (target->data)
xfree(target->data);
target_data = calloc(1, len);
if (target_data == NULL)
return -1;
memcpy(target_data, mnl_attr_get_payload(tb[NFTA_TARGET_INFO]), len);
target->data = target_data;
target->data_len = len;
e->flags |= (1 << NFTNL_EXPR_TG_INFO);
}
return 0;
}
static int data_cb(const struct nlmsghdr *nlh, void *data)
{
struct nlattr *tb[CTA_MAX+1] = {};
struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
mnl_attr_parse(nlh, sizeof(*nfg), data_attr_cb, tb);
if (tb[CTA_TUPLE_ORIG])
print_tuple(tb[CTA_TUPLE_ORIG]);
if (tb[CTA_MARK])
printf("mark=%u ", ntohl(mnl_attr_get_u32(tb[CTA_MARK])));
if (tb[CTA_SECMARK])
printf("secmark=%u ", ntohl(mnl_attr_get_u32(tb[CTA_SECMARK])));
if (tb[CTA_COUNTERS_ORIG]) {
printf("original ");
print_counters(tb[CTA_COUNTERS_ORIG]);
}
if (tb[CTA_COUNTERS_REPLY]) {
printf("reply ");
print_counters(tb[CTA_COUNTERS_REPLY]);
}
printf("\n");
return MNL_CB_OK;
}
static int
nft_rule_expr_ct_parse(struct nft_rule_expr *e, struct nlattr *attr)
{
struct nft_expr_ct *ct = nft_expr_data(e);
struct nlattr *tb[NFTA_CT_MAX+1] = {};
if (mnl_attr_parse_nested(attr, nft_rule_expr_ct_cb, tb) < 0)
return -1;
if (tb[NFTA_CT_KEY]) {
ct->key = ntohl(mnl_attr_get_u32(tb[NFTA_CT_KEY]));
e->flags |= (1 << NFT_EXPR_CT_KEY);
}
if (tb[NFTA_CT_DREG]) {
ct->dreg = ntohl(mnl_attr_get_u32(tb[NFTA_CT_DREG]));
e->flags |= (1 << NFT_EXPR_CT_DREG);
}
if (tb[NFTA_CT_SREG]) {
ct->sreg = ntohl(mnl_attr_get_u32(tb[NFTA_CT_SREG]));
e->flags |= (1 << NFT_EXPR_CT_SREG);
}
if (tb[NFTA_CT_DIRECTION]) {
ct->dir = mnl_attr_get_u8(tb[NFTA_CT_DIRECTION]);
e->flags |= (1 << NFT_EXPR_CT_DIR);
}
return 0;
}
static int link_mon_peer_list_cb(const struct nlmsghdr *nlh, void *data)
{
struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
struct nlattr *attrs[TIPC_NLA_MON_PEER_MAX + 1] = {};
struct nlattr *info[TIPC_NLA_MAX + 1] = {};
uint16_t member_cnt;
uint32_t applied;
uint32_t dom_gen;
uint64_t up_map;
char status[16];
char monitored[16];
mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
if (!info[TIPC_NLA_MON_PEER])
return MNL_CB_ERROR;
open_json_object(NULL);
mnl_attr_parse_nested(info[TIPC_NLA_MON_PEER], parse_attrs, attrs);
(attrs[TIPC_NLA_MON_PEER_LOCAL] || attrs[TIPC_NLA_MON_PEER_HEAD]) ?
strcpy(monitored, "direct") :
strcpy(monitored, "indirect");
attrs[TIPC_NLA_MON_PEER_UP] ?
strcpy(status, "up") :
strcpy(status, "down");
dom_gen = attrs[TIPC_NLA_MON_PEER_DOMGEN] ?
mnl_attr_get_u32(attrs[TIPC_NLA_MON_PEER_DOMGEN]) : 0;
link_mon_print_peer_state(mnl_attr_get_u32(attrs[TIPC_NLA_MON_PEER_ADDR]),
status, monitored, dom_gen);
applied = mnl_attr_get_u32(attrs[TIPC_NLA_MON_PEER_APPLIED]);
if (!applied)
goto exit;
up_map = mnl_attr_get_u64(attrs[TIPC_NLA_MON_PEER_UPMAP]);
member_cnt = mnl_attr_get_payload_len(attrs[TIPC_NLA_MON_PEER_MEMBERS]);
/* each tipc address occupies 4 bytes of payload, hence compensate it */
member_cnt /= sizeof(uint32_t);
link_mon_print_applied(applied, up_map);
link_mon_print_non_applied(applied, member_cnt, up_map,
mnl_attr_get_payload(attrs[TIPC_NLA_MON_PEER_MEMBERS]));
exit:
print_string(PRINT_FP, NULL, "\n", "");
close_json_object();
return MNL_CB_OK;
}
int nfexp_nlmsg_parse(const struct nlmsghdr *nlh, struct nf_expect *exp)
{
struct nlattr *tb[CTA_EXPECT_MAX+1] = {};
struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
mnl_attr_parse(nlh, sizeof(struct nfgenmsg),
nlmsg_parse_expection_attr_cb, tb);
if (tb[CTA_EXPECT_MASTER]) {
exp->expected.orig.l3protonum = nfg->nfgen_family;
set_bit(ATTR_ORIG_L3PROTO, exp->expected.set);
nfct_parse_tuple(tb[CTA_EXPECT_MASTER], &exp->master.orig,
__DIR_ORIG, exp->master.set);
set_bit(ATTR_EXP_MASTER, exp->set);
}
if (tb[CTA_EXPECT_TUPLE]) {
exp->mask.orig.l3protonum = nfg->nfgen_family;
set_bit(ATTR_ORIG_L3PROTO, exp->mask.set);
nfct_parse_tuple(tb[CTA_EXPECT_TUPLE], &exp->expected.orig,
__DIR_ORIG, exp->expected.set);
set_bit(ATTR_EXP_EXPECTED, exp->set);
}
if (tb[CTA_EXPECT_MASK]) {
exp->master.orig.l3protonum = nfg->nfgen_family;
set_bit(ATTR_ORIG_L3PROTO, exp->master.set);
nfct_parse_tuple(tb[CTA_EXPECT_MASK], &exp->mask.orig,
__DIR_ORIG, exp->mask.set);
set_bit(ATTR_EXP_MASK, exp->set);
}
if (tb[CTA_EXPECT_TIMEOUT]) {
exp->timeout = ntohl(mnl_attr_get_u32(tb[CTA_EXPECT_TIMEOUT]));
set_bit(ATTR_EXP_TIMEOUT, exp->set);
}
if (tb[CTA_EXPECT_ZONE]) {
exp->zone = ntohs(mnl_attr_get_u16(tb[CTA_EXPECT_ZONE]));
set_bit(ATTR_EXP_ZONE, exp->set);
}
if (tb[CTA_EXPECT_FLAGS]) {
exp->flags = ntohl(mnl_attr_get_u32(tb[CTA_EXPECT_FLAGS]));
set_bit(ATTR_EXP_FLAGS, exp->set);
}
if (tb[CTA_EXPECT_HELP_NAME]) {
strncpy(exp->helper_name,
mnl_attr_get_str(tb[CTA_EXPECT_HELP_NAME]),
NFCT_HELPER_NAME_MAX);
set_bit(ATTR_EXP_HELPER_NAME, exp->set);
}
return 0;
}
static int
nfct_parse_counters(const struct nlattr *attr, struct nf_conntrack *ct,
int dir)
{
struct nlattr *tb[CTA_COUNTERS_MAX+1] = {};
if (mnl_attr_parse_nested(attr, nfct_parse_counters_attr_cb, tb) < 0)
return -1;
if (tb[CTA_COUNTERS_PACKETS] || tb[CTA_COUNTERS32_PACKETS]) {
if (tb[CTA_COUNTERS32_PACKETS]) {
ct->counters[dir].packets =
ntohl(mnl_attr_get_u32(tb[CTA_COUNTERS32_PACKETS]));
}
if (tb[CTA_COUNTERS_PACKETS]) {
ct->counters[dir].packets =
be64toh(mnl_attr_get_u64(tb[CTA_COUNTERS_PACKETS]));
}
switch(dir) {
case __DIR_ORIG:
set_bit(ATTR_ORIG_COUNTER_PACKETS, ct->head.set);
break;
case __DIR_REPL:
set_bit(ATTR_REPL_COUNTER_PACKETS, ct->head.set);
break;
}
}
if (tb[CTA_COUNTERS_BYTES] || tb[CTA_COUNTERS32_BYTES]) {
if (tb[CTA_COUNTERS32_BYTES]) {
ct->counters[dir].bytes =
ntohl(mnl_attr_get_u32(tb[CTA_COUNTERS32_BYTES]));
}
if (tb[CTA_COUNTERS_BYTES]) {
ct->counters[dir].bytes =
be64toh(mnl_attr_get_u64(tb[CTA_COUNTERS_BYTES]));
}
switch(dir) {
case __DIR_ORIG:
set_bit(ATTR_ORIG_COUNTER_BYTES, ct->head.set);
break;
case __DIR_REPL:
set_bit(ATTR_REPL_COUNTER_BYTES, ct->head.set);
break;
}
}
return 0;
}
static int
nfct_parse_nat_seq(const struct nlattr *attr, struct nf_conntrack *ct, int dir)
{
struct nlattr *tb[CTA_NAT_SEQ_MAX+1] = {};
if (mnl_attr_parse_nested(attr, nfct_parse_nat_seq_attr_cb, tb) < 0)
return -1;
if (tb[CTA_NAT_SEQ_CORRECTION_POS]) {
ct->natseq[dir].correction_pos =
ntohl(mnl_attr_get_u32(tb[CTA_NAT_SEQ_CORRECTION_POS]));
switch(dir) {
case __DIR_ORIG:
set_bit(ATTR_ORIG_NAT_SEQ_CORRECTION_POS, ct->head.set);
break;
case __DIR_REPL:
set_bit(ATTR_REPL_NAT_SEQ_CORRECTION_POS, ct->head.set);
break;
}
}
if (tb[CTA_NAT_SEQ_OFFSET_BEFORE]) {
ct->natseq[dir].offset_before =
ntohl(mnl_attr_get_u32(tb[CTA_NAT_SEQ_OFFSET_BEFORE]));
switch(dir) {
case __DIR_ORIG:
set_bit(ATTR_ORIG_NAT_SEQ_OFFSET_BEFORE, ct->head.set);
break;
case __DIR_REPL:
set_bit(ATTR_REPL_NAT_SEQ_OFFSET_BEFORE, ct->head.set);
break;
}
}
if (tb[CTA_NAT_SEQ_OFFSET_AFTER]) {
ct->natseq[dir].offset_after =
ntohl(mnl_attr_get_u32(tb[CTA_NAT_SEQ_OFFSET_AFTER]));
switch(dir) {
case __DIR_ORIG:
set_bit(ATTR_ORIG_NAT_SEQ_OFFSET_AFTER, ct->head.set);
break;
case __DIR_REPL:
set_bit(ATTR_REPL_NAT_SEQ_OFFSET_AFTER, ct->head.set);
break;
}
}
return 0;
}
static int res_no_args_parse_cb(const struct nlmsghdr *nlh, void *data)
{
struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
struct rd *rd = data;
const char *name;
uint32_t idx;
mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] ||
!tb[RDMA_NLDEV_ATTR_DEV_NAME] ||
!tb[RDMA_NLDEV_ATTR_RES_SUMMARY])
return MNL_CB_ERROR;
idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
if (rd->json_output) {
jsonw_uint_field(rd->jw, "ifindex", idx);
jsonw_string_field(rd->jw, "ifname", name);
} else {
pr_out("%u: %s: ", idx, name);
}
res_print_summary(rd, tb);
if (!rd->json_output)
pr_out("\n");
return MNL_CB_OK;
}
int res_pd_parse_cb(const struct nlmsghdr *nlh, void *data)
{
struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
struct nlattr *nla_table, *nla_entry;
struct rd *rd = data;
int ret = MNL_CB_OK;
const char *name;
uint32_t idx;
mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_DEV_NAME] ||
!tb[RDMA_NLDEV_ATTR_RES_PD])
return MNL_CB_ERROR;
name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
nla_table = tb[RDMA_NLDEV_ATTR_RES_PD];
mnl_attr_for_each_nested(nla_entry, nla_table) {
struct nlattr *nla_line[RDMA_NLDEV_ATTR_MAX] = {};
ret = mnl_attr_parse_nested(nla_entry, rd_attr_cb, nla_line);
if (ret != MNL_CB_OK)
break;
ret = res_pd_line(rd, name, idx, nla_line);
if (ret != MNL_CB_OK)
break;
}
return ret;
}
static int node_list_cb(const struct nlmsghdr *nlh, void *data)
{
uint32_t addr;
struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
struct nlattr *info[TIPC_NLA_MAX + 1] = {};
struct nlattr *attrs[TIPC_NLA_NODE_MAX + 1] = {};
mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
if (!info[TIPC_NLA_NODE])
return MNL_CB_ERROR;
mnl_attr_parse_nested(info[TIPC_NLA_NODE], parse_attrs, attrs);
if (!attrs[TIPC_NLA_NODE_ADDR])
return MNL_CB_ERROR;
addr = mnl_attr_get_u32(attrs[TIPC_NLA_NODE_ADDR]);
printf("<%u.%u.%u>: ",
tipc_zone(addr),
tipc_cluster(addr),
tipc_node(addr));
if (attrs[TIPC_NLA_NODE_UP])
printf("up\n");
else
printf("down\n");
return MNL_CB_OK;
}
//Function which parses the netlink message (*ADDR) we have received and extract
//relevant information, which is parsed to OS-independent
//neat_addr_update_src_list
static void neat_linux_handle_addr(struct neat_ctx *nc,
struct nlmsghdr *nl_hdr)
{
struct ifaddrmsg *ifm = (struct ifaddrmsg*) mnl_nlmsg_get_payload(nl_hdr);
const struct nlattr *attr_table[IFA_MAX+1];
//IFA_MAX is the largest index I can store in my array. Since arrays are
//zero-indexed, this is IFA_MAX and not IFA_MAX + 1. However, array has to
//be of size IFA_MAX + 1. DOH!
struct nlattr_storage tb_storage = {attr_table, IFA_MAX};
struct sockaddr_storage src_addr;
struct sockaddr_in *src_addr4;
struct sockaddr_in6 *src_addr6;
struct ifa_cacheinfo *ci;
uint32_t *addr6_ptr, ifa_pref = 0, ifa_valid = 0;
uint8_t i;
//On Linux, lo has a fixed index. We have no interest in that interface
//TODO: Consider other filters - bridges, ifb, ...
if (ifm->ifa_index == LO_DEV_IDX)
return;
if (ifm->ifa_scope == RT_SCOPE_LINK)
return;
memset(attr_table, 0, sizeof(attr_table));
memset(&src_addr, 0, sizeof(src_addr));
if (mnl_attr_parse(nl_hdr, sizeof(struct ifaddrmsg),
neat_linux_parse_nlattr, &tb_storage) != MNL_CB_OK) {
fprintf(stderr, "Failed to parse nlattr for msg of type %d\n",
nl_hdr->nlmsg_type);
return;
}
//v4 and v6 has to be handled differently, both due to address size and
//available information
if (ifm->ifa_family == AF_INET) {
src_addr4 = (struct sockaddr_in*) &src_addr;
src_addr4->sin_family = AF_INET;
src_addr4->sin_addr.s_addr = mnl_attr_get_u32(attr_table[IFA_LOCAL]);
} else {
src_addr6 = (struct sockaddr_in6*) &src_addr;
src_addr6->sin6_family = AF_INET6;
addr6_ptr = (uint32_t*) mnl_attr_get_payload(attr_table[IFA_ADDRESS]);
for (i=0; i<4; i++)
src_addr6->sin6_addr.s6_addr32[i] = *(addr6_ptr + i);
ci = (struct ifa_cacheinfo*) mnl_attr_get_payload(attr_table[IFA_CACHEINFO]);
ifa_pref = ci->ifa_prefered;
ifa_valid = ci->ifa_valid;
}
//TODO: Should this function be a callback instead? Will we have multiple
//addresses handlers/types of context?
neat_addr_update_src_list(nc, &src_addr, ifm->ifa_index,
nl_hdr->nlmsg_type == RTM_NEWADDR, ifa_pref, ifa_valid);
}
static void attributes_show_ipv4(struct nlattr *tb[])
{
if (tb[RTA_TABLE]) {
printf("table=%u ", mnl_attr_get_u32(tb[RTA_TABLE]));
}
if (tb[RTA_DST]) {
struct in_addr *addr = mnl_attr_get_payload(tb[RTA_DST]);
printf("dst=%s ", inet_ntoa(*addr));
}
if (tb[RTA_SRC]) {
struct in_addr *addr = mnl_attr_get_payload(tb[RTA_SRC]);
printf("src=%s ", inet_ntoa(*addr));
}
if (tb[RTA_OIF]) {
printf("oif=%u ", mnl_attr_get_u32(tb[RTA_OIF]));
}
if (tb[RTA_FLOW]) {
printf("flow=%u ", mnl_attr_get_u32(tb[RTA_FLOW]));
}
if (tb[RTA_PREFSRC]) {
struct in_addr *addr = mnl_attr_get_payload(tb[RTA_PREFSRC]);
printf("prefsrc=%s ", inet_ntoa(*addr));
}
if (tb[RTA_GATEWAY]) {
struct in_addr *addr = mnl_attr_get_payload(tb[RTA_GATEWAY]);
printf("gw=%s ", inet_ntoa(*addr));
}
if (tb[RTA_PRIORITY]) {
printf("prio=%u ", mnl_attr_get_u32(tb[RTA_PRIORITY]));
}
if (tb[RTA_METRICS]) {
int i;
struct nlattr *tbx[RTAX_MAX+1] = {};
mnl_attr_parse_nested(tb[RTA_METRICS], data_attr_cb2, tbx);
for (i=0; i<RTAX_MAX; i++) {
if (tbx[i]) {
printf("metrics[%d]=%u ",
i, mnl_attr_get_u32(tbx[i]));
}
}
}
printf("\n");
}
static int cb(const struct nlmsghdr *nlh, void *data)
{
struct nlattr *tb[NLE_MAX];
struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
mnl_attr_parse(nlh, sizeof(*genl), data_attr_cb, tb);
if (tb[NLE_MYVAR])
printf("myvar=%d\n", mnl_attr_get_u32(tb[NLE_MYVAR]));
return MNL_CB_OK;
}
static int nametable_show_cb(const struct nlmsghdr *nlh, void *data)
{
int *iteration = data;
char port_id[PORTID_STR_LEN];
struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
struct nlattr *info[TIPC_NLA_MAX + 1] = {};
struct nlattr *attrs[TIPC_NLA_NAME_TABLE_MAX + 1] = {};
struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1] = {};
const char *scope[] = { "", "zone", "cluster", "node" };
mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
if (!info[TIPC_NLA_NAME_TABLE])
return MNL_CB_ERROR;
mnl_attr_parse_nested(info[TIPC_NLA_NAME_TABLE], parse_attrs, attrs);
if (!attrs[TIPC_NLA_NAME_TABLE_PUBL])
return MNL_CB_ERROR;
mnl_attr_parse_nested(attrs[TIPC_NLA_NAME_TABLE_PUBL], parse_attrs, publ);
if (!publ[TIPC_NLA_NAME_TABLE_PUBL])
return MNL_CB_ERROR;
if (!*iteration)
printf("%-10s %-10s %-10s %-26s %-10s\n",
"Type", "Lower", "Upper", "Port Identity",
"Publication Scope");
(*iteration)++;
snprintf(port_id, sizeof(port_id), "<%u.%u.%u:%u>",
tipc_zone(mnl_attr_get_u32(publ[TIPC_NLA_PUBL_NODE])),
tipc_cluster(mnl_attr_get_u32(publ[TIPC_NLA_PUBL_NODE])),
tipc_node(mnl_attr_get_u32(publ[TIPC_NLA_PUBL_NODE])),
mnl_attr_get_u32(publ[TIPC_NLA_PUBL_REF]));
printf("%-10u %-10u %-10u %-26s %-12u",
mnl_attr_get_u32(publ[TIPC_NLA_PUBL_TYPE]),
mnl_attr_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
mnl_attr_get_u32(publ[TIPC_NLA_PUBL_UPPER]),
port_id,
mnl_attr_get_u32(publ[TIPC_NLA_PUBL_KEY]));
printf("%s\n", scope[mnl_attr_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
return MNL_CB_OK;
}
static int link_get_cb(const struct nlmsghdr *nlh, void *data)
{
int *prop = data;
struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
struct nlattr *info[TIPC_NLA_MAX + 1] = {};
struct nlattr *attrs[TIPC_NLA_LINK_MAX + 1] = {};
struct nlattr *props[TIPC_NLA_PROP_MAX + 1] = {};
mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
if (!info[TIPC_NLA_LINK])
return MNL_CB_ERROR;
mnl_attr_parse_nested(info[TIPC_NLA_LINK], parse_attrs, attrs);
if (!attrs[TIPC_NLA_LINK_PROP])
return MNL_CB_ERROR;
mnl_attr_parse_nested(attrs[TIPC_NLA_LINK_PROP], parse_attrs, props);
if (!props[*prop])
return MNL_CB_ERROR;
new_json_obj(json);
open_json_object(NULL);
switch (*prop) {
case TIPC_NLA_PROP_PRIO:
print_uint(PRINT_ANY, PRIORITY_STR, "%u\n", mnl_attr_get_u32(props[*prop]));
break;
case TIPC_NLA_PROP_TOL:
print_uint(PRINT_ANY, TOLERANCE_STR, "%u\n", mnl_attr_get_u32(props[*prop]));
break;
case TIPC_NLA_PROP_WIN:
print_uint(PRINT_ANY, WINDOW_STR, "%u\n", mnl_attr_get_u32(props[*prop]));
break;
default:
break;
}
close_json_object();
delete_json_obj();
return MNL_CB_OK;
}
static int
nft_rule_expr_log_parse(struct nft_rule_expr *e, struct nlattr *attr)
{
struct nft_expr_log *log = nft_expr_data(e);
struct nlattr *tb[NFTA_LOG_MAX+1] = {};
if (mnl_attr_parse_nested(attr, nft_rule_expr_log_cb, tb) < 0)
return -1;
if (tb[NFTA_LOG_PREFIX]) {
if (log->prefix)
xfree(log->prefix);
log->prefix = strdup(mnl_attr_get_str(tb[NFTA_LOG_PREFIX]));
e->flags |= (1 << NFT_EXPR_LOG_PREFIX);
}
if (tb[NFTA_LOG_GROUP]) {
log->group = ntohs(mnl_attr_get_u16(tb[NFTA_LOG_GROUP]));
e->flags |= (1 << NFT_EXPR_LOG_GROUP);
}
if (tb[NFTA_LOG_SNAPLEN]) {
log->snaplen = ntohl(mnl_attr_get_u32(tb[NFTA_LOG_SNAPLEN]));
e->flags |= (1 << NFT_EXPR_LOG_SNAPLEN);
}
if (tb[NFTA_LOG_QTHRESHOLD]) {
log->qthreshold = ntohs(mnl_attr_get_u16(tb[NFTA_LOG_QTHRESHOLD]));
e->flags |= (1 << NFT_EXPR_LOG_QTHRESHOLD);
}
if (tb[NFTA_LOG_LEVEL]) {
log->level = ntohl(mnl_attr_get_u32(tb[NFTA_LOG_LEVEL]));
e->flags |= (1 << NFT_EXPR_LOG_LEVEL);
}
if (tb[NFTA_LOG_FLAGS]) {
log->flags = ntohl(mnl_attr_get_u32(tb[NFTA_LOG_FLAGS]));
e->flags |= (1 << NFT_EXPR_LOG_FLAGS);
}
return 0;
}
static int data_cb(const struct nlmsghdr *nlh, void *data)
{
struct nlattr *tb[CTRL_ATTR_MAX+1] = {};
struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
mnl_attr_parse(nlh, sizeof(*genl), data_attr_cb, tb);
if (tb[CTRL_ATTR_FAMILY_NAME]) {
printf("name=%s\t",
mnl_attr_get_str(tb[CTRL_ATTR_FAMILY_NAME]));
}
if (tb[CTRL_ATTR_FAMILY_ID]) {
printf("id=%u\t",
mnl_attr_get_u16(tb[CTRL_ATTR_FAMILY_ID]));
}
if (tb[CTRL_ATTR_VERSION]) {
printf("version=%u\t",
mnl_attr_get_u32(tb[CTRL_ATTR_VERSION]));
}
if (tb[CTRL_ATTR_HDRSIZE]) {
printf("hdrsize=%u\t",
mnl_attr_get_u32(tb[CTRL_ATTR_HDRSIZE]));
}
if (tb[CTRL_ATTR_MAXATTR]) {
printf("maxattr=%u\t",
mnl_attr_get_u32(tb[CTRL_ATTR_MAXATTR]));
}
printf("\n");
if (tb[CTRL_ATTR_OPS]) {
printf("ops:\n");
parse_genl_family_ops(tb[CTRL_ATTR_OPS]);
}
if (tb[CTRL_ATTR_MCAST_GROUPS]) {
printf("grps:\n");
parse_genl_mc_grps(tb[CTRL_ATTR_MCAST_GROUPS]);
}
printf("\n");
return MNL_CB_OK;
}
static int
nft_rule_expr_byteorder_parse(struct nft_rule_expr *e, struct nlattr *attr)
{
struct nft_expr_byteorder *byteorder = nft_expr_data(e);
struct nlattr *tb[NFTA_BYTEORDER_MAX+1] = {};
int ret = 0;
if (mnl_attr_parse_nested(attr, nft_rule_expr_byteorder_cb, tb) < 0)
return -1;
if (tb[NFTA_BYTEORDER_SREG]) {
byteorder->sreg =
ntohl(mnl_attr_get_u32(tb[NFTA_BYTEORDER_SREG]));
e->flags |= (1 << NFT_EXPR_BYTEORDER_SREG);
}
if (tb[NFTA_BYTEORDER_DREG]) {
byteorder->dreg =
ntohl(mnl_attr_get_u32(tb[NFTA_BYTEORDER_DREG]));
e->flags |= (1 << NFT_EXPR_BYTEORDER_DREG);
}
if (tb[NFTA_BYTEORDER_OP]) {
byteorder->op =
ntohl(mnl_attr_get_u32(tb[NFTA_BYTEORDER_OP]));
e->flags |= (1 << NFT_EXPR_BYTEORDER_OP);
}
if (tb[NFTA_BYTEORDER_LEN]) {
byteorder->len =
ntohl(mnl_attr_get_u32(tb[NFTA_BYTEORDER_LEN]));
e->flags |= (1 << NFT_EXPR_BYTEORDER_LEN);
}
if (tb[NFTA_BYTEORDER_SIZE]) {
byteorder->size =
ntohl(mnl_attr_get_u32(tb[NFTA_BYTEORDER_SIZE]));
e->flags |= (1 << NFT_EXPR_BYTEORDER_SIZE);
}
return ret;
}
int nftnl_gen_nlmsg_parse(const struct nlmsghdr *nlh, struct nftnl_gen *gen)
{
struct nlattr *tb[NFTA_GEN_MAX + 1] = {};
struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
if (mnl_attr_parse(nlh, sizeof(*nfg), nftnl_gen_parse_attr_cb, tb) < 0)
return -1;
if (tb[NFTA_GEN_ID]) {
gen->id = ntohl(mnl_attr_get_u32(tb[NFTA_GEN_ID]));
gen->flags |= (1 << NFTNL_GEN_ID);
}
return 0;
}
//Function which parses the netlink message (*ADDR) we have received and extract
//relevant information, which is parsed to OS-independent
//neat_addr_update_src_list
static neat_error_code
nt_linux_handle_addr(struct neat_ctx *ctx, struct nlmsghdr *nl_hdr)
{
struct ifaddrmsg *ifm = (struct ifaddrmsg*) mnl_nlmsg_get_payload(nl_hdr);
const struct nlattr *attr_table[IFA_MAX+1];
//IFA_MAX is the largest index I can store in my array. Since arrays are
//zero-indexed, this is IFA_MAX and not IFA_MAX + 1. However, array has to
//be of size IFA_MAX + 1. DOH!
struct nlattr_storage tb_storage = {attr_table, IFA_MAX};
struct sockaddr_storage src_addr;
struct sockaddr_in *src_addr4;
struct sockaddr_in6 *src_addr6;
struct ifa_cacheinfo *ci;
uint32_t ifa_pref = 0, ifa_valid = 0;
if (ifm->ifa_scope == RT_SCOPE_LINK)
return NEAT_ERROR_OK;
memset(attr_table, 0, sizeof(attr_table));
memset(&src_addr, 0, sizeof(src_addr));
if (mnl_attr_parse(nl_hdr, sizeof(struct ifaddrmsg),
neat_linux_parse_nlattr, &tb_storage) != MNL_CB_OK) {
nt_log(ctx, NEAT_LOG_ERROR, "Failed to parse nlattr for msg of type %d",
__func__, nl_hdr->nlmsg_type);
return NEAT_ERROR_OK;
}
//v4 and v6 has to be handled differently, both due to address size and
//available information
if (ifm->ifa_family == AF_INET) {
src_addr4 = (struct sockaddr_in*) &src_addr;
src_addr4->sin_family = AF_INET;
src_addr4->sin_addr.s_addr = mnl_attr_get_u32(attr_table[IFA_LOCAL]);
} else {
src_addr6 = (struct sockaddr_in6*) &src_addr;
src_addr6->sin6_family = AF_INET6;
memcpy(&src_addr6->sin6_addr, mnl_attr_get_payload(attr_table[IFA_ADDRESS]), sizeof(struct in6_addr));
ci = (struct ifa_cacheinfo*) mnl_attr_get_payload(attr_table[IFA_CACHEINFO]);
ifa_pref = ci->ifa_prefered;
ifa_valid = ci->ifa_valid;
}
//TODO: Should this function be a callback instead? Will we have multiple
//addresses handlers/types of context?
return nt_addr_update_src_list(ctx, (struct sockaddr*) &src_addr, ifm->ifa_index,
nl_hdr->nlmsg_type == RTM_NEWADDR,
ifm->ifa_prefixlen, ifa_pref, ifa_valid);
}
int res_pd_idx_parse_cb(const struct nlmsghdr *nlh, void *data)
{
struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
struct rd *rd = data;
const char *name;
uint32_t idx;
mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_DEV_NAME])
return MNL_CB_ERROR;
name = mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]);
idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
return res_pd_line(rd, name, idx, tb);
}
static int netid_get_cb(const struct nlmsghdr *nlh, void *data)
{
struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
struct nlattr *info[TIPC_NLA_MAX + 1] = {};
struct nlattr *attrs[TIPC_NLA_NET_MAX + 1] = {};
mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
if (!info[TIPC_NLA_NET])
return MNL_CB_ERROR;
mnl_attr_parse_nested(info[TIPC_NLA_NET], parse_attrs, attrs);
if (!attrs[TIPC_NLA_NET_ID])
return MNL_CB_ERROR;
printf("%u\n", mnl_attr_get_u32(attrs[TIPC_NLA_NET_ID]));
return MNL_CB_OK;
}
static void parse_genl_family_ops(struct nlattr *nested)
{
struct nlattr *pos;
mnl_attr_for_each_nested(pos, nested) {
struct nlattr *tb[CTRL_ATTR_OP_MAX+1] = {};
mnl_attr_parse_nested(pos, parse_family_ops_cb, tb);
if (tb[CTRL_ATTR_OP_ID]) {
printf("id-0x%x ",
mnl_attr_get_u32(tb[CTRL_ATTR_OP_ID]));
}
if (tb[CTRL_ATTR_OP_MAX]) {
printf("flags ");
}
printf("\n");
}
}
static void parse_genl_mc_grps(struct nlattr *nested)
{
struct nlattr *pos;
mnl_attr_for_each_nested(pos, nested) {
struct nlattr *tb[CTRL_ATTR_MCAST_GRP_MAX+1] = {};
mnl_attr_parse_nested(pos, parse_mc_grps_cb, tb);
if (tb[CTRL_ATTR_MCAST_GRP_ID]) {
printf("id-0x%x ",
mnl_attr_get_u32(tb[CTRL_ATTR_MCAST_GRP_ID]));
}
if (tb[CTRL_ATTR_MCAST_GRP_NAME]) {
printf("name: %s ",
mnl_attr_get_str(tb[CTRL_ATTR_MCAST_GRP_NAME]));
}
printf("\n");
}
}
static int nft_rule_expr_match_parse(struct nft_rule_expr *e, struct nlattr *attr)
{
struct nft_expr_match *match = nft_expr_data(e);
struct nlattr *tb[NFTA_MATCH_MAX+1] = {};
if (mnl_attr_parse_nested(attr, nft_rule_expr_match_cb, tb) < 0)
return -1;
if (tb[NFTA_MATCH_NAME]) {
snprintf(match->name, XT_EXTENSION_MAXNAMELEN, "%s",
mnl_attr_get_str(tb[NFTA_MATCH_NAME]));
match->name[XT_EXTENSION_MAXNAMELEN-1] = '\0';
e->flags |= (1 << NFT_EXPR_MT_NAME);
}
if (tb[NFTA_MATCH_REV]) {
match->rev = ntohl(mnl_attr_get_u32(tb[NFTA_MATCH_REV]));
e->flags |= (1 << NFT_EXPR_MT_REV);
}
if (tb[NFTA_MATCH_INFO]) {
uint32_t len = mnl_attr_get_payload_len(tb[NFTA_MATCH_INFO]);
void *match_data;
if (match->data)
xfree(match->data);
match_data = calloc(1, len);
if (match_data == NULL)
return -1;
memcpy(match_data, mnl_attr_get_payload(tb[NFTA_MATCH_INFO]), len);
match->data = match_data;
match->data_len = len;
e->flags |= (1 << NFT_EXPR_MT_INFO);
}
return 0;
}
static int
nft_rule_expr_nat_parse(struct nft_rule_expr *e, struct nlattr *attr)
{
struct nft_expr_nat *nat = nft_expr_data(e);
struct nlattr *tb[NFTA_NAT_MAX+1] = {};
if (mnl_attr_parse_nested(attr, nft_rule_expr_nat_cb, tb) < 0)
return -1;
if (tb[NFTA_NAT_TYPE]) {
nat->type = ntohl(mnl_attr_get_u32(tb[NFTA_NAT_TYPE]));
e->flags |= (1 << NFT_EXPR_NAT_TYPE);
}
if (tb[NFTA_NAT_FAMILY]) {
nat->family = ntohl(mnl_attr_get_u32(tb[NFTA_NAT_FAMILY]));
e->flags |= (1 << NFT_EXPR_NAT_FAMILY);
}
if (tb[NFTA_NAT_REG_ADDR_MIN]) {
nat->sreg_addr_min =
ntohl(mnl_attr_get_u32(tb[NFTA_NAT_REG_ADDR_MIN]));
e->flags |= (1 << NFT_EXPR_NAT_REG_ADDR_MIN);
}
if (tb[NFTA_NAT_REG_ADDR_MAX]) {
nat->sreg_addr_max =
ntohl(mnl_attr_get_u32(tb[NFTA_NAT_REG_ADDR_MAX]));
e->flags |= (1 << NFT_EXPR_NAT_REG_ADDR_MAX);
}
if (tb[NFTA_NAT_REG_PROTO_MIN]) {
nat->sreg_proto_min =
ntohl(mnl_attr_get_u32(tb[NFTA_NAT_REG_PROTO_MIN]));
e->flags |= (1 << NFT_EXPR_NAT_REG_PROTO_MIN);
}
if (tb[NFTA_NAT_REG_PROTO_MAX]) {
nat->sreg_proto_max =
ntohl(mnl_attr_get_u32(tb[NFTA_NAT_REG_PROTO_MAX]));
e->flags |= (1 << NFT_EXPR_NAT_REG_PROTO_MAX);
}
if (tb[NFTA_NAT_FLAGS]) {
nat->flags = ntohl(mnl_attr_get_u32(tb[NFTA_NAT_FLAGS]));
e->flags |= (1 << NFT_EXPR_NAT_FLAGS);
}
return 0;
}
static int link_mon_get_cb(const struct nlmsghdr *nlh, void *data)
{
struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
struct nlattr *info[TIPC_NLA_MAX + 1] = {};
struct nlattr *attrs[TIPC_NLA_MON_MAX + 1] = {};
mnl_attr_parse(nlh, sizeof(*genl), parse_attrs, info);
if (!info[TIPC_NLA_MON])
return MNL_CB_ERROR;
mnl_attr_parse_nested(info[TIPC_NLA_MON], parse_attrs, attrs);
if (!attrs[TIPC_NLA_MON_ACTIVATION_THRESHOLD])
return MNL_CB_ERROR;
new_json_obj(json);
print_uint(PRINT_ANY, "threshold", "%u\n",
mnl_attr_get_u32(attrs[TIPC_NLA_MON_ACTIVATION_THRESHOLD]));
delete_json_obj();
return MNL_CB_OK;
}
static int log_cb(const struct nlmsghdr *nlh, void *data)
{
struct nlattr *tb[NFULA_MAX+1] = {};
struct nfulnl_msg_packet_hdr *ph = NULL;
const char *prefix = NULL;
uint32_t mark = 0;
mnl_attr_parse(nlh, sizeof(struct nfgenmsg), parse_attr_cb, tb);
if (tb[NFULA_PACKET_HDR])
ph = mnl_attr_get_payload(tb[NFULA_PACKET_HDR]);
if (tb[NFULA_PREFIX])
prefix = mnl_attr_get_str(tb[NFULA_PREFIX]);
if (tb[NFULA_MARK])
mark = ntohl(mnl_attr_get_u32(tb[NFULA_MARK]));
printf("log received (prefix=\"%s\" hw=0x%04x hook=%u mark=%u)\n",
prefix ? prefix : "", ntohs(ph->hw_protocol), ph->hook,
mark);
return MNL_CB_OK;
}
static void parse_genl_mc_grps(struct nlattr *nested,
struct group_info *group_info)
{
struct nlattr *pos;
const char *name;
mnl_attr_for_each_nested(pos, nested) {
struct nlattr *tb[CTRL_ATTR_MCAST_GRP_MAX + 1] = {};
mnl_attr_parse_nested(pos, parse_mc_grps_cb, tb);
if (!tb[CTRL_ATTR_MCAST_GRP_NAME] ||
!tb[CTRL_ATTR_MCAST_GRP_ID])
continue;
name = mnl_attr_get_str(tb[CTRL_ATTR_MCAST_GRP_NAME]);
if (strcmp(name, group_info->name) != 0)
continue;
group_info->id = mnl_attr_get_u32(tb[CTRL_ATTR_MCAST_GRP_ID]);
group_info->found = true;
}
}
static int
nftnl_expr_payload_parse(struct nftnl_expr *e, struct nlattr *attr)
{
struct nftnl_expr_payload *payload = nftnl_expr_data(e);
struct nlattr *tb[NFTA_PAYLOAD_MAX+1] = {};
if (mnl_attr_parse_nested(attr, nftnl_expr_payload_cb, tb) < 0)
return -1;
if (tb[NFTA_PAYLOAD_SREG]) {
payload->sreg = ntohl(mnl_attr_get_u32(tb[NFTA_PAYLOAD_SREG]));
e->flags |= (1 << NFT_EXPR_PAYLOAD_SREG);
}
if (tb[NFTA_PAYLOAD_DREG]) {
payload->dreg = ntohl(mnl_attr_get_u32(tb[NFTA_PAYLOAD_DREG]));
e->flags |= (1 << NFTNL_EXPR_PAYLOAD_DREG);
}
if (tb[NFTA_PAYLOAD_BASE]) {
payload->base = ntohl(mnl_attr_get_u32(tb[NFTA_PAYLOAD_BASE]));
e->flags |= (1 << NFTNL_EXPR_PAYLOAD_BASE);
}
if (tb[NFTA_PAYLOAD_OFFSET]) {
payload->offset = ntohl(mnl_attr_get_u32(tb[NFTA_PAYLOAD_OFFSET]));
e->flags |= (1 << NFTNL_EXPR_PAYLOAD_OFFSET);
}
if (tb[NFTA_PAYLOAD_LEN]) {
payload->len = ntohl(mnl_attr_get_u32(tb[NFTA_PAYLOAD_LEN]));
e->flags |= (1 << NFTNL_EXPR_PAYLOAD_LEN);
}
if (tb[NFTA_PAYLOAD_CSUM_TYPE]) {
payload->csum_type = ntohl(mnl_attr_get_u32(tb[NFTA_PAYLOAD_CSUM_TYPE]));
e->flags |= (1 << NFTNL_EXPR_PAYLOAD_CSUM_TYPE);
}
if (tb[NFTA_PAYLOAD_CSUM_OFFSET]) {
payload->csum_offset = ntohl(mnl_attr_get_u32(tb[NFTA_PAYLOAD_CSUM_OFFSET]));
e->flags |= (1 << NFTNL_EXPR_PAYLOAD_CSUM_OFFSET);
}
return 0;
}