130 typedef void snl_parse_field_f(struct snl_state *ss, void *hdr, void *target);
137 typedef bool snl_parse_attr_f(struct snl_state *ss, struct nlattr *attr,
151 typedef bool snl_parse_post_f(struct snl_state *ss, void *target);
202 snl_allocz(struct snl_state *ss, int len)  in snl_allocz()  argument
204 	void *data = lb_allocz(ss->lb, len);  in snl_allocz()
207 		uint32_t size = ss->lb->size * 2;  in snl_allocz()
215 			lb->next = ss->lb;  in snl_allocz()
216 			ss->lb = lb;  in snl_allocz()
217 			data = lb_allocz(ss->lb, len);  in snl_allocz()
225 snl_clear_lb(struct snl_state *ss)  in snl_clear_lb()  argument
227 	struct linear_buffer *lb = ss->lb;  in snl_clear_lb()
231 	ss->lb->next = NULL;  in snl_clear_lb()
241 snl_free(struct snl_state *ss)  in snl_free()  argument
243 	if (ss->init_done) {  in snl_free()
244 		close(ss->fd);  in snl_free()
245 		if (ss->buf != NULL)  in snl_free()
246 			free(ss->buf);  in snl_free()
247 		if (ss->lb != NULL) {  in snl_free()
248 			snl_clear_lb(ss);  in snl_free()
249 			lb_free(ss->lb);  in snl_free()
255 snl_init(struct snl_state *ss, int netlink_family)  in snl_init()  argument
257 	memset(ss, 0, sizeof(*ss));  in snl_init()
259 	ss->fd = socket(AF_NETLINK, SOCK_RAW, netlink_family);  in snl_init()
260 	if (ss->fd == -1)  in snl_init()
262 	ss->init_done = true;  in snl_init()
266 	if (setsockopt(ss->fd, SOL_NETLINK, NETLINK_EXT_ACK, &val, optlen) == -1) {  in snl_init()
267 		snl_free(ss);  in snl_init()
272 	if (getsockopt(ss->fd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, &optlen) == -1) {  in snl_init()
273 		snl_free(ss);  in snl_init()
277 	ss->bufsize = rcvbuf;  in snl_init()
278 	ss->buf = (char *)malloc(ss->bufsize);  in snl_init()
279 	if (ss->buf == NULL) {  in snl_init()
280 		snl_free(ss);  in snl_init()
284 	ss->lb = lb_init(SCRATCH_BUFFER_SIZE);  in snl_init()
285 	if (ss->lb == NULL) {  in snl_init()
286 		snl_free(ss);  in snl_init()
294 snl_send(struct snl_state *ss, void *data, int sz)  in snl_send()  argument
296 	return (send(ss->fd, data, sz, 0) == sz);  in snl_send()
300 snl_send_message(struct snl_state *ss, struct nlmsghdr *hdr)  in snl_send_message()  argument
304 	return (send(ss->fd, hdr, sz, 0) == sz);  in snl_send_message()
308 snl_get_seq(struct snl_state *ss)  in snl_get_seq()  argument
310 	return (++ss->seq);  in snl_get_seq()
320 static inline bool parse_cmsg(struct snl_state *ss, const struct msghdr *msg,
324 snl_read_message_dbg(struct snl_state *ss, struct snl_msg_info *cinfo)  in snl_read_message_dbg()  argument
328 	if (ss->off == ss->datalen) {  in snl_read_message_dbg()
333 			.iov_base = ss->buf,  in snl_read_message_dbg()
334 			.iov_len = ss->bufsize,  in snl_read_message_dbg()
344 		ss->off = 0;  in snl_read_message_dbg()
345 		ss->datalen = 0;  in snl_read_message_dbg()
347 			ssize_t datalen = recvmsg(ss->fd, &msg, 0);  in snl_read_message_dbg()
349 				ss->datalen = datalen;  in snl_read_message_dbg()
350 				parse_cmsg(ss, &msg, cinfo);  in snl_read_message_dbg()
356 	struct nlmsghdr *hdr = (struct nlmsghdr *)(void *)&ss->buf[ss->off];  in snl_read_message_dbg()
357 	ss->off += NLMSG_ALIGN(hdr->nlmsg_len);  in snl_read_message_dbg()
363 snl_read_message(struct snl_state *ss)  in snl_read_message()  argument
365 	if (ss->off == ss->datalen) {  in snl_read_message()
368 			.iov_base = ss->buf,  in snl_read_message()
369 			.iov_len = ss->bufsize,  in snl_read_message()
377 		ss->off = 0;  in snl_read_message()
378 		ss->datalen = 0;  in snl_read_message()
380 			ssize_t datalen = recvmsg(ss->fd, &msg, 0);  in snl_read_message()
382 				ss->datalen = datalen;  in snl_read_message()
388 	struct nlmsghdr *hdr = (struct nlmsghdr *)(void *)&ss->buf[ss->off];  in snl_read_message()
389 	ss->off += NLMSG_ALIGN(hdr->nlmsg_len);  in snl_read_message()
394 snl_read_reply(struct snl_state *ss, uint32_t nlmsg_seq)  in snl_read_reply()  argument
398 	while ((hdr = snl_read_message(ss)) != NULL) {  in snl_read_reply()
448 snl_parse_attrs_raw(struct snl_state *ss, struct nlattr *nla_head, int len,  in snl_parse_attrs_raw()  argument
460 			if (!s->cb(ss, nla, s->arg, ptr))  in snl_parse_attrs_raw()
468 snl_parse_attrs(struct snl_state *ss, struct nlmsghdr *hdr, int hdrlen,  in snl_parse_attrs()  argument
475 	return (snl_parse_attrs_raw(ss, nla_head, len, ps, pslen, target));  in snl_parse_attrs()
479 snl_parse_fields(struct snl_state *ss, struct nlmsghdr *hdr, int hdrlen __unused,  in snl_parse_fields()  argument
487 		fp->cb(ss, src, dst);  in snl_parse_fields()
492 snl_parse_header(struct snl_state *ss, void *hdr, int len,  in snl_parse_header()  argument
498 	snl_parse_fields(ss, (struct nlmsghdr *)hdr, parser->in_hdr_size,  in snl_parse_header()
502 	bool result = snl_parse_attrs_raw(ss, nla_head, len - parser->in_hdr_size,  in snl_parse_header()
506 		result = parser->cb_post(ss, target);  in snl_parse_header()
512 snl_parse_nlmsg(struct snl_state *ss, struct nlmsghdr *hdr,  in snl_parse_nlmsg()  argument
515 	return (snl_parse_header(ss, hdr + 1, hdr->nlmsg_len - sizeof(*hdr), parser, target));  in snl_parse_nlmsg()
519 snl_attr_get_flag(struct snl_state *ss __unused, struct nlattr *nla, const void *arg __unused,  in snl_attr_get_flag()
530 snl_attr_get_bytes(struct snl_state *ss __unused, struct nlattr *nla, const void *arg,  in snl_attr_get_bytes()
542 snl_attr_get_bool(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_bool()
553 snl_attr_get_uint8(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_uint8()
564 snl_attr_get_uint16(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_uint16()
575 snl_attr_get_uint32(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_uint32()
586 snl_attr_get_uint64(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_uint64()
597 snl_attr_get_int8(struct snl_state *ss, struct nlattr *nla, const void *arg,  in snl_attr_get_int8()  argument
600 	return (snl_attr_get_uint8(ss, nla, arg, target));  in snl_attr_get_int8()
604 snl_attr_get_int16(struct snl_state *ss, struct nlattr *nla, const void *arg,  in snl_attr_get_int16()  argument
607 	return (snl_attr_get_uint16(ss, nla, arg, target));  in snl_attr_get_int16()
611 snl_attr_get_int32(struct snl_state *ss, struct nlattr *nla, const void *arg,  in snl_attr_get_int32()  argument
614 	return (snl_attr_get_uint32(ss, nla, arg, target));  in snl_attr_get_int32()
618 snl_attr_get_int64(struct snl_state *ss, struct nlattr *nla, const void *arg,  in snl_attr_get_int64()  argument
621 	return (snl_attr_get_uint64(ss, nla, arg, target));  in snl_attr_get_int64()
625 snl_attr_get_string(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_string()
638 snl_attr_get_stringn(struct snl_state *ss, struct nlattr *nla,  in snl_attr_get_stringn()  argument
643 	char *buf = (char *)snl_allocz(ss, maxlen + 1);  in snl_attr_get_stringn()
654 snl_attr_copy_string(struct snl_state *ss, struct nlattr *nla,  in snl_attr_copy_string()  argument
659 	if (snl_attr_get_string(ss, nla, NULL, &tmp)) {  in snl_attr_copy_string()
667 snl_attr_dup_string(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_dup_string()
673 		char *buf = (char *)snl_allocz(ss, maxlen);  in snl_attr_dup_string()
684 snl_attr_get_nested(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target)  in snl_attr_get_nested()  argument
689 	return (snl_parse_header(ss, NLA_DATA(nla), NLA_DATA_LEN(nla), p, target));  in snl_attr_get_nested()
698 snl_attr_get_parray_sz(struct snl_state *ss, struct nlattr *container_nla,  in snl_attr_get_parray_sz()  argument
709 	array->items = (void **)snl_allocz(ss, size * sizeof(void *));  in snl_attr_get_parray_sz()
726 		void *item = snl_allocz(ss, p->out_size);  in snl_attr_get_parray_sz()
734 		if (!(snl_parse_header(ss, data, data_len, p, item)))  in snl_attr_get_parray_sz()
739 			void **new_array = (void **)snl_allocz(ss, new_size *sizeof(void *));  in snl_attr_get_parray_sz()
759 snl_attr_get_parray(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target)  in snl_attr_get_parray()  argument
761 	return (snl_attr_get_parray_sz(ss, nla, 8, arg, target));  in snl_attr_get_parray()
765 snl_attr_get_nla(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_nla()
773 snl_attr_dup_nla(struct snl_state *ss, struct nlattr *nla,  in snl_attr_dup_nla()  argument
776 	void *ptr = snl_allocz(ss, nla->nla_len);  in snl_attr_dup_nla()
787 snl_attr_copy_struct(struct snl_state *ss, struct nlattr *nla,  in snl_attr_copy_struct()  argument
790 	void *ptr = snl_allocz(ss, NLA_DATA_LEN(nla));  in snl_attr_copy_struct()
801 snl_attr_dup_struct(struct snl_state *ss, struct nlattr *nla,  in snl_attr_dup_struct()  argument
804 	void *ptr = snl_allocz(ss, NLA_DATA_LEN(nla));  in snl_attr_dup_struct()
850 _cb_p_bitset(struct snl_state *ss __unused, void *_target)  in _cb_p_bitset()
884 snl_attr_get_bitset_c(struct snl_state *ss, struct nlattr *nla,  in snl_attr_get_bitset_c()  argument
891 	if (!snl_parse_header(ss, NLA_DATA(nla), NLA_DATA_LEN(nla), p, _target))  in snl_attr_get_bitset_c()
899 snl_field_get_uint8(struct snl_state *ss __unused, void *src, void *target)  in snl_field_get_uint8()
905 snl_field_get_uint16(struct snl_state *ss __unused, void *src, void *target)  in snl_field_get_uint16()
911 snl_field_get_uint32(struct snl_state *ss __unused, void *src, void *target)  in snl_field_get_uint32()
917 snl_field_get_ptr(struct snl_state *ss __unused, void *src, void *target)  in snl_field_get_ptr()
956 snl_parse_errmsg(struct snl_state *ss, struct nlmsghdr *hdr, struct snl_errmsg_data *e)  in snl_parse_errmsg()  argument
959 		return (snl_parse_nlmsg(ss, hdr, &snl_errmsg_parser, e));  in snl_parse_errmsg()
967 	snl_parse_fields(ss, (struct nlmsghdr *)errmsg, hdrlen, ps->fp, ps->fp_size, e);  in snl_parse_errmsg()
968 	return (snl_parse_attrs_raw(ss, attr_head, attr_len, ps->np, ps->np_size, e));  in snl_parse_errmsg()
972 snl_read_reply_code(struct snl_state *ss, uint32_t nlmsg_seq, struct snl_errmsg_data *e)  in snl_read_reply_code()  argument
974 	struct nlmsghdr *hdr = snl_read_reply(ss, nlmsg_seq);  in snl_read_reply_code()
979 		if (!snl_parse_errmsg(ss, hdr, e))  in snl_read_reply_code()
997 parse_cmsg(struct snl_state *ss, const struct msghdr *msg, struct snl_msg_info *attrs)  in parse_cmsg()  argument
1008 		return (snl_parse_attrs_raw(ss, (struct nlattr *)data, len, ps->np, ps->np_size, attrs));  in parse_cmsg()
1018 snl_read_reply_multi(struct snl_state *ss, uint32_t nlmsg_seq, struct snl_errmsg_data *e)  in snl_read_reply_multi()  argument
1020 	struct nlmsghdr *hdr = snl_read_reply(ss, nlmsg_seq);  in snl_read_reply_multi()
1025 		if (!snl_parse_errmsg(ss, hdr, e))  in snl_read_reply_multi()
1028 		snl_parse_nlmsg(ss, hdr, &snl_donemsg_parser, e);  in snl_read_reply_multi()
1042 	struct snl_state	*ss;  member
1047 snl_init_writer(struct snl_state *ss, struct snl_writer *nw)  in snl_init_writer()  argument
1050 	nw->base = (char *)snl_allocz(ss, nw->size);  in snl_init_writer()
1059 	nw->ss = ss;  in snl_init_writer()
1073 	if (snl_allocz(nw->ss, new_size) == NULL) {  in snl_realloc_msg_buffer()
1079 	void *new_base = nw->ss->lb->base;  in snl_realloc_msg_buffer()
1296 		hdr->nlmsg_seq = snl_get_seq(nw->ss);  in snl_finalize_msg()
1312 	return (snl_send(nw->ss, nw->base, offset));  in snl_send_msgs()