129 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()
254 snl_init(struct snl_state *ss, int netlink_family)  in snl_init()  argument
256 	memset(ss, 0, sizeof(*ss));  in snl_init()
258 	ss->fd = socket(AF_NETLINK, SOCK_RAW, netlink_family);  in snl_init()
259 	if (ss->fd == -1)  in snl_init()
261 	ss->init_done = true;  in snl_init()
265 	if (setsockopt(ss->fd, SOL_NETLINK, NETLINK_EXT_ACK, &val, optlen) == -1) {  in snl_init()
266 		snl_free(ss);  in snl_init()
271 	if (getsockopt(ss->fd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, &optlen) == -1) {  in snl_init()
272 		snl_free(ss);  in snl_init()
276 	ss->bufsize = rcvbuf;  in snl_init()
277 	ss->buf = (char *)malloc(ss->bufsize);  in snl_init()
278 	if (ss->buf == NULL) {  in snl_init()
279 		snl_free(ss);  in snl_init()
283 	ss->lb = lb_init(SCRATCH_BUFFER_SIZE);  in snl_init()
284 	if (ss->lb == NULL) {  in snl_init()
285 		snl_free(ss);  in snl_init()
293 snl_clone(struct snl_state *ss, const struct snl_state *orig)  in snl_clone()  argument
295 	*ss = (struct snl_state){  in snl_clone()
299 	return ((ss->lb = lb_init(SCRATCH_BUFFER_SIZE)) != NULL);  in snl_clone()
303 snl_send(struct snl_state *ss, void *data, int sz)  in snl_send()  argument
305 	return (send(ss->fd, data, sz, 0) == sz);  in snl_send()
309 snl_send_message(struct snl_state *ss, struct nlmsghdr *hdr)  in snl_send_message()  argument
313 	return (send(ss->fd, hdr, sz, 0) == sz);  in snl_send_message()
317 snl_get_seq(struct snl_state *ss)  in snl_get_seq()  argument
319 	return (++ss->seq);  in snl_get_seq()
329 static inline bool parse_cmsg(struct snl_state *ss, const struct msghdr *msg,
333 snl_read_message_dbg(struct snl_state *ss, struct snl_msg_info *cinfo)  in snl_read_message_dbg()  argument
337 	if (ss->off == ss->datalen) {  in snl_read_message_dbg()
342 			.iov_base = ss->buf,  in snl_read_message_dbg()
343 			.iov_len = ss->bufsize,  in snl_read_message_dbg()
353 		ss->off = 0;  in snl_read_message_dbg()
354 		ss->datalen = 0;  in snl_read_message_dbg()
356 			ssize_t datalen = recvmsg(ss->fd, &msg, 0);  in snl_read_message_dbg()
358 				ss->datalen = datalen;  in snl_read_message_dbg()
359 				parse_cmsg(ss, &msg, cinfo);  in snl_read_message_dbg()
365 	struct nlmsghdr *hdr = (struct nlmsghdr *)(void *)&ss->buf[ss->off];  in snl_read_message_dbg()
366 	ss->off += NLMSG_ALIGN(hdr->nlmsg_len);  in snl_read_message_dbg()
372 snl_read_message(struct snl_state *ss)  in snl_read_message()  argument
374 	if (ss->off == ss->datalen) {  in snl_read_message()
377 			.iov_base = ss->buf,  in snl_read_message()
378 			.iov_len = ss->bufsize,  in snl_read_message()
386 		ss->off = 0;  in snl_read_message()
387 		ss->datalen = 0;  in snl_read_message()
389 			ssize_t datalen = recvmsg(ss->fd, &msg, 0);  in snl_read_message()
391 				ss->datalen = datalen;  in snl_read_message()
397 	struct nlmsghdr *hdr = (struct nlmsghdr *)(void *)&ss->buf[ss->off];  in snl_read_message()
398 	ss->off += NLMSG_ALIGN(hdr->nlmsg_len);  in snl_read_message()
403 snl_read_reply(struct snl_state *ss, uint32_t nlmsg_seq)  in snl_read_reply()  argument
407 	while ((hdr = snl_read_message(ss)) != NULL) {  in snl_read_reply()
457 snl_parse_attrs_raw(struct snl_state *ss, struct nlattr *nla_head, int len,  in snl_parse_attrs_raw()  argument
469 			if (!s->cb(ss, nla, s->arg, ptr))  in snl_parse_attrs_raw()
477 snl_parse_attrs(struct snl_state *ss, struct nlmsghdr *hdr, int hdrlen,  in snl_parse_attrs()  argument
484 	return (snl_parse_attrs_raw(ss, nla_head, len, ps, pslen, target));  in snl_parse_attrs()
488 snl_parse_fields(struct snl_state *ss, struct nlmsghdr *hdr, int hdrlen __unused,  in snl_parse_fields()  argument
496 		fp->cb(ss, src, dst);  in snl_parse_fields()
501 snl_parse_header(struct snl_state *ss, void *hdr, int len,  in snl_parse_header()  argument
507 	snl_parse_fields(ss, (struct nlmsghdr *)hdr, parser->in_hdr_size,  in snl_parse_header()
511 	bool result = snl_parse_attrs_raw(ss, nla_head, len - parser->in_hdr_size,  in snl_parse_header()
515 		result = parser->cb_post(ss, target);  in snl_parse_header()
521 snl_parse_nlmsg(struct snl_state *ss, struct nlmsghdr *hdr,  in snl_parse_nlmsg()  argument
524 	return (snl_parse_header(ss, hdr + 1, hdr->nlmsg_len - sizeof(*hdr), parser, target));  in snl_parse_nlmsg()
528 snl_attr_get_flag(struct snl_state *ss __unused, struct nlattr *nla, const void *arg __unused,  in snl_attr_get_flag()
539 snl_attr_get_bytes(struct snl_state *ss __unused, struct nlattr *nla, const void *arg,  in snl_attr_get_bytes()
551 snl_attr_get_bool(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_bool()
562 snl_attr_get_uint8(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_uint8()
573 snl_attr_get_uint16(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_uint16()
584 snl_attr_get_uint32(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_uint32()
595 snl_attr_get_uint64(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_uint64()
606 snl_attr_get_int8(struct snl_state *ss, struct nlattr *nla, const void *arg,  in snl_attr_get_int8()  argument
609 	return (snl_attr_get_uint8(ss, nla, arg, target));  in snl_attr_get_int8()
613 snl_attr_get_int16(struct snl_state *ss, struct nlattr *nla, const void *arg,  in snl_attr_get_int16()  argument
616 	return (snl_attr_get_uint16(ss, nla, arg, target));  in snl_attr_get_int16()
620 snl_attr_get_int32(struct snl_state *ss, struct nlattr *nla, const void *arg,  in snl_attr_get_int32()  argument
623 	return (snl_attr_get_uint32(ss, nla, arg, target));  in snl_attr_get_int32()
627 snl_attr_get_int64(struct snl_state *ss, struct nlattr *nla, const void *arg,  in snl_attr_get_int64()  argument
630 	return (snl_attr_get_uint64(ss, nla, arg, target));  in snl_attr_get_int64()
634 snl_attr_get_string(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_string()
647 snl_attr_get_stringn(struct snl_state *ss, struct nlattr *nla,  in snl_attr_get_stringn()  argument
652 	char *buf = (char *)snl_allocz(ss, maxlen + 1);  in snl_attr_get_stringn()
663 snl_attr_copy_string(struct snl_state *ss, struct nlattr *nla,  in snl_attr_copy_string()  argument
668 	if (snl_attr_get_string(ss, nla, NULL, &tmp)) {  in snl_attr_copy_string()
676 snl_attr_dup_string(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_dup_string()
682 		char *buf = (char *)snl_allocz(ss, maxlen);  in snl_attr_dup_string()
693 snl_attr_get_nested(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target)  in snl_attr_get_nested()  argument
698 	return (snl_parse_header(ss, NLA_DATA(nla), NLA_DATA_LEN(nla), p, target));  in snl_attr_get_nested()
707 snl_attr_get_parray_sz(struct snl_state *ss, struct nlattr *container_nla,  in snl_attr_get_parray_sz()  argument
718 	array->items = (void **)snl_allocz(ss, size * sizeof(void *));  in snl_attr_get_parray_sz()
735 		void *item = snl_allocz(ss, p->out_size);  in snl_attr_get_parray_sz()
743 		if (!(snl_parse_header(ss, data, data_len, p, item)))  in snl_attr_get_parray_sz()
748 			void **new_array = (void **)snl_allocz(ss, new_size *sizeof(void *));  in snl_attr_get_parray_sz()
768 snl_attr_get_parray(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target)  in snl_attr_get_parray()  argument
770 	return (snl_attr_get_parray_sz(ss, nla, 8, arg, target));  in snl_attr_get_parray()
774 snl_attr_get_nla(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_nla()
782 snl_attr_dup_nla(struct snl_state *ss, struct nlattr *nla,  in snl_attr_dup_nla()  argument
785 	void *ptr = snl_allocz(ss, nla->nla_len);  in snl_attr_dup_nla()
796 snl_attr_copy_struct(struct snl_state *ss, struct nlattr *nla,  in snl_attr_copy_struct()  argument
799 	void *ptr = snl_allocz(ss, NLA_DATA_LEN(nla));  in snl_attr_copy_struct()
810 snl_attr_dup_struct(struct snl_state *ss, struct nlattr *nla,  in snl_attr_dup_struct()  argument
813 	void *ptr = snl_allocz(ss, NLA_DATA_LEN(nla));  in snl_attr_dup_struct()
859 _cb_p_bitset(struct snl_state *ss __unused, void *_target)  in _cb_p_bitset()
893 snl_attr_get_bitset_c(struct snl_state *ss, struct nlattr *nla,  in snl_attr_get_bitset_c()  argument
900 	if (!snl_parse_header(ss, NLA_DATA(nla), NLA_DATA_LEN(nla), p, _target))  in snl_attr_get_bitset_c()
908 snl_field_get_uint8(struct snl_state *ss __unused, void *src, void *target)  in snl_field_get_uint8()
914 snl_field_get_uint16(struct snl_state *ss __unused, void *src, void *target)  in snl_field_get_uint16()
920 snl_field_get_uint32(struct snl_state *ss __unused, void *src, void *target)  in snl_field_get_uint32()
926 snl_field_get_ptr(struct snl_state *ss __unused, void *src, void *target)  in snl_field_get_ptr()
965 snl_parse_errmsg(struct snl_state *ss, struct nlmsghdr *hdr, struct snl_errmsg_data *e)  in snl_parse_errmsg()  argument
968 		return (snl_parse_nlmsg(ss, hdr, &snl_errmsg_parser, e));  in snl_parse_errmsg()
976 	snl_parse_fields(ss, (struct nlmsghdr *)errmsg, hdrlen, ps->fp, ps->fp_size, e);  in snl_parse_errmsg()
977 	return (snl_parse_attrs_raw(ss, attr_head, attr_len, ps->np, ps->np_size, e));  in snl_parse_errmsg()
981 snl_read_reply_code(struct snl_state *ss, uint32_t nlmsg_seq, struct snl_errmsg_data *e)  in snl_read_reply_code()  argument
983 	struct nlmsghdr *hdr = snl_read_reply(ss, nlmsg_seq);  in snl_read_reply_code()
988 		if (!snl_parse_errmsg(ss, hdr, e))  in snl_read_reply_code()
1006 parse_cmsg(struct snl_state *ss, const struct msghdr *msg, struct snl_msg_info *attrs)  in parse_cmsg()  argument
1017 		return (snl_parse_attrs_raw(ss, (struct nlattr *)data, len, ps->np, ps->np_size, attrs));  in parse_cmsg()
1027 snl_read_reply_multi(struct snl_state *ss, uint32_t nlmsg_seq, struct snl_errmsg_data *e)  in snl_read_reply_multi()  argument
1029 	struct nlmsghdr *hdr = snl_read_reply(ss, nlmsg_seq);  in snl_read_reply_multi()
1034 		if (!snl_parse_errmsg(ss, hdr, e))  in snl_read_reply_multi()
1037 		snl_parse_nlmsg(ss, hdr, &snl_donemsg_parser, e);  in snl_read_reply_multi()
1051 	struct snl_state	*ss;  member
1056 snl_init_writer(struct snl_state *ss, struct snl_writer *nw)  in snl_init_writer()  argument
1059 	nw->base = (char *)snl_allocz(ss, nw->size);  in snl_init_writer()
1068 	nw->ss = ss;  in snl_init_writer()
1082 	if (snl_allocz(nw->ss, new_size) == NULL) {  in snl_realloc_msg_buffer()
1088 	void *new_base = nw->ss->lb->base;  in snl_realloc_msg_buffer()
1311 		hdr->nlmsg_seq = snl_get_seq(nw->ss);  in snl_finalize_msg()
1327 	return (snl_send(nw->ss, nw->base, offset));  in snl_send_msgs()