129 typedef void snl_parse_field_f(struct snl_state *ss, void *hdr, void *target);
136 typedef bool snl_parse_attr_f(struct snl_state *ss, struct nlattr *attr,
150 typedef bool snl_parse_post_f(struct snl_state *ss, void *target);
201 snl_allocz(struct snl_state *ss, int len)  in snl_allocz()  argument
203 	void *data = lb_allocz(ss->lb, len);  in snl_allocz()
206 		uint32_t size = ss->lb->size * 2;  in snl_allocz()
214 			lb->next = ss->lb;  in snl_allocz()
215 			ss->lb = lb;  in snl_allocz()
216 			data = lb_allocz(ss->lb, len);  in snl_allocz()
224 snl_clear_lb(struct snl_state *ss)  in snl_clear_lb()  argument
226 	struct linear_buffer *lb = ss->lb;  in snl_clear_lb()
230 	ss->lb->next = NULL;  in snl_clear_lb()
240 snl_free(struct snl_state *ss)  in snl_free()  argument
242 	if (ss->init_done) {  in snl_free()
243 		close(ss->fd);  in snl_free()
244 		if (ss->buf != NULL)  in snl_free()
245 			free(ss->buf);  in snl_free()
246 		if (ss->lb != NULL) {  in snl_free()
247 			snl_clear_lb(ss);  in snl_free()
248 			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_send(struct snl_state *ss, void *data, int sz)  in snl_send()  argument
295 	return (send(ss->fd, data, sz, 0) == sz);  in snl_send()
299 snl_send_message(struct snl_state *ss, struct nlmsghdr *hdr)  in snl_send_message()  argument
303 	return (send(ss->fd, hdr, sz, 0) == sz);  in snl_send_message()
307 snl_get_seq(struct snl_state *ss)  in snl_get_seq()  argument
309 	return (++ss->seq);  in snl_get_seq()
319 static inline bool parse_cmsg(struct snl_state *ss, const struct msghdr *msg,
323 snl_read_message_dbg(struct snl_state *ss, struct snl_msg_info *cinfo)  in snl_read_message_dbg()  argument
327 	if (ss->off == ss->datalen) {  in snl_read_message_dbg()
332 			.iov_base = ss->buf,  in snl_read_message_dbg()
333 			.iov_len = ss->bufsize,  in snl_read_message_dbg()
343 		ss->off = 0;  in snl_read_message_dbg()
344 		ss->datalen = 0;  in snl_read_message_dbg()
346 			ssize_t datalen = recvmsg(ss->fd, &msg, 0);  in snl_read_message_dbg()
348 				ss->datalen = datalen;  in snl_read_message_dbg()
349 				parse_cmsg(ss, &msg, cinfo);  in snl_read_message_dbg()
355 	struct nlmsghdr *hdr = (struct nlmsghdr *)(void *)&ss->buf[ss->off];  in snl_read_message_dbg()
356 	ss->off += NLMSG_ALIGN(hdr->nlmsg_len);  in snl_read_message_dbg()
362 snl_read_message(struct snl_state *ss)  in snl_read_message()  argument
364 	if (ss->off == ss->datalen) {  in snl_read_message()
367 			.iov_base = ss->buf,  in snl_read_message()
368 			.iov_len = ss->bufsize,  in snl_read_message()
376 		ss->off = 0;  in snl_read_message()
377 		ss->datalen = 0;  in snl_read_message()
379 			ssize_t datalen = recvmsg(ss->fd, &msg, 0);  in snl_read_message()
381 				ss->datalen = datalen;  in snl_read_message()
387 	struct nlmsghdr *hdr = (struct nlmsghdr *)(void *)&ss->buf[ss->off];  in snl_read_message()
388 	ss->off += NLMSG_ALIGN(hdr->nlmsg_len);  in snl_read_message()
393 snl_read_reply(struct snl_state *ss, uint32_t nlmsg_seq)  in snl_read_reply()  argument
397 	while ((hdr = snl_read_message(ss)) != NULL) {  in snl_read_reply()
447 snl_parse_attrs_raw(struct snl_state *ss, struct nlattr *nla_head, int len,  in snl_parse_attrs_raw()  argument
459 			if (!s->cb(ss, nla, s->arg, ptr))  in snl_parse_attrs_raw()
467 snl_parse_attrs(struct snl_state *ss, struct nlmsghdr *hdr, int hdrlen,  in snl_parse_attrs()  argument
474 	return (snl_parse_attrs_raw(ss, nla_head, len, ps, pslen, target));  in snl_parse_attrs()
478 snl_parse_fields(struct snl_state *ss, struct nlmsghdr *hdr, int hdrlen __unused,  in snl_parse_fields()  argument
486 		fp->cb(ss, src, dst);  in snl_parse_fields()
491 snl_parse_header(struct snl_state *ss, void *hdr, int len,  in snl_parse_header()  argument
497 	snl_parse_fields(ss, (struct nlmsghdr *)hdr, parser->in_hdr_size,  in snl_parse_header()
501 	bool result = snl_parse_attrs_raw(ss, nla_head, len - parser->in_hdr_size,  in snl_parse_header()
505 		result = parser->cb_post(ss, target);  in snl_parse_header()
511 snl_parse_nlmsg(struct snl_state *ss, struct nlmsghdr *hdr,  in snl_parse_nlmsg()  argument
514 	return (snl_parse_header(ss, hdr + 1, hdr->nlmsg_len - sizeof(*hdr), parser, target));  in snl_parse_nlmsg()
518 snl_attr_get_flag(struct snl_state *ss __unused, struct nlattr *nla, const void *arg __unused,  in snl_attr_get_flag()
529 snl_attr_get_bytes(struct snl_state *ss __unused, struct nlattr *nla, const void *arg,  in snl_attr_get_bytes()
541 snl_attr_get_bool(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_bool()
552 snl_attr_get_uint8(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_uint8()
563 snl_attr_get_uint16(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_uint16()
574 snl_attr_get_uint32(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_uint32()
585 snl_attr_get_uint64(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_uint64()
596 snl_attr_get_int8(struct snl_state *ss, struct nlattr *nla, const void *arg,  in snl_attr_get_int8()  argument
599 	return (snl_attr_get_uint8(ss, nla, arg, target));  in snl_attr_get_int8()
603 snl_attr_get_int16(struct snl_state *ss, struct nlattr *nla, const void *arg,  in snl_attr_get_int16()  argument
606 	return (snl_attr_get_uint16(ss, nla, arg, target));  in snl_attr_get_int16()
610 snl_attr_get_int32(struct snl_state *ss, struct nlattr *nla, const void *arg,  in snl_attr_get_int32()  argument
613 	return (snl_attr_get_uint32(ss, nla, arg, target));  in snl_attr_get_int32()
617 snl_attr_get_int64(struct snl_state *ss, struct nlattr *nla, const void *arg,  in snl_attr_get_int64()  argument
620 	return (snl_attr_get_uint64(ss, nla, arg, target));  in snl_attr_get_int64()
624 snl_attr_get_string(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_string()
637 snl_attr_get_stringn(struct snl_state *ss, struct nlattr *nla,  in snl_attr_get_stringn()  argument
642 	char *buf = (char *)snl_allocz(ss, maxlen + 1);  in snl_attr_get_stringn()
653 snl_attr_copy_string(struct snl_state *ss, struct nlattr *nla,  in snl_attr_copy_string()  argument
658 	if (snl_attr_get_string(ss, nla, NULL, &tmp)) {  in snl_attr_copy_string()
666 snl_attr_dup_string(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_dup_string()
672 		char *buf = (char *)snl_allocz(ss, maxlen);  in snl_attr_dup_string()
683 snl_attr_get_nested(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target)  in snl_attr_get_nested()  argument
688 	return (snl_parse_header(ss, NLA_DATA(nla), NLA_DATA_LEN(nla), p, target));  in snl_attr_get_nested()
697 snl_attr_get_parray_sz(struct snl_state *ss, struct nlattr *container_nla,  in snl_attr_get_parray_sz()  argument
708 	array->items = (void **)snl_allocz(ss, size * sizeof(void *));  in snl_attr_get_parray_sz()
725 		void *item = snl_allocz(ss, p->out_size);  in snl_attr_get_parray_sz()
733 		if (!(snl_parse_header(ss, data, data_len, p, item)))  in snl_attr_get_parray_sz()
738 			void **new_array = (void **)snl_allocz(ss, new_size *sizeof(void *));  in snl_attr_get_parray_sz()
758 snl_attr_get_parray(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target)  in snl_attr_get_parray()  argument
760 	return (snl_attr_get_parray_sz(ss, nla, 8, arg, target));  in snl_attr_get_parray()
764 snl_attr_get_nla(struct snl_state *ss __unused, struct nlattr *nla,  in snl_attr_get_nla()
772 snl_attr_dup_nla(struct snl_state *ss, struct nlattr *nla,  in snl_attr_dup_nla()  argument
775 	void *ptr = snl_allocz(ss, nla->nla_len);  in snl_attr_dup_nla()
786 snl_attr_copy_struct(struct snl_state *ss, struct nlattr *nla,  in snl_attr_copy_struct()  argument
789 	void *ptr = snl_allocz(ss, NLA_DATA_LEN(nla));  in snl_attr_copy_struct()
800 snl_attr_dup_struct(struct snl_state *ss, struct nlattr *nla,  in snl_attr_dup_struct()  argument
803 	void *ptr = snl_allocz(ss, NLA_DATA_LEN(nla));  in snl_attr_dup_struct()
849 _cb_p_bitset(struct snl_state *ss __unused, void *_target)  in _cb_p_bitset()
883 snl_attr_get_bitset_c(struct snl_state *ss, struct nlattr *nla,  in snl_attr_get_bitset_c()  argument
890 	if (!snl_parse_header(ss, NLA_DATA(nla), NLA_DATA_LEN(nla), p, _target))  in snl_attr_get_bitset_c()
898 snl_field_get_uint8(struct snl_state *ss __unused, void *src, void *target)  in snl_field_get_uint8()
904 snl_field_get_uint16(struct snl_state *ss __unused, void *src, void *target)  in snl_field_get_uint16()
910 snl_field_get_uint32(struct snl_state *ss __unused, void *src, void *target)  in snl_field_get_uint32()
916 snl_field_get_ptr(struct snl_state *ss __unused, void *src, void *target)  in snl_field_get_ptr()
955 snl_parse_errmsg(struct snl_state *ss, struct nlmsghdr *hdr, struct snl_errmsg_data *e)  in snl_parse_errmsg()  argument
958 		return (snl_parse_nlmsg(ss, hdr, &snl_errmsg_parser, e));  in snl_parse_errmsg()
966 	snl_parse_fields(ss, (struct nlmsghdr *)errmsg, hdrlen, ps->fp, ps->fp_size, e);  in snl_parse_errmsg()
967 	return (snl_parse_attrs_raw(ss, attr_head, attr_len, ps->np, ps->np_size, e));  in snl_parse_errmsg()
971 snl_read_reply_code(struct snl_state *ss, uint32_t nlmsg_seq, struct snl_errmsg_data *e)  in snl_read_reply_code()  argument
973 	struct nlmsghdr *hdr = snl_read_reply(ss, nlmsg_seq);  in snl_read_reply_code()
978 		if (!snl_parse_errmsg(ss, hdr, e))  in snl_read_reply_code()
996 parse_cmsg(struct snl_state *ss, const struct msghdr *msg, struct snl_msg_info *attrs)  in parse_cmsg()  argument
1007 		return (snl_parse_attrs_raw(ss, (struct nlattr *)data, len, ps->np, ps->np_size, attrs));  in parse_cmsg()
1017 snl_read_reply_multi(struct snl_state *ss, uint32_t nlmsg_seq, struct snl_errmsg_data *e)  in snl_read_reply_multi()  argument
1019 	struct nlmsghdr *hdr = snl_read_reply(ss, nlmsg_seq);  in snl_read_reply_multi()
1024 		if (!snl_parse_errmsg(ss, hdr, e))  in snl_read_reply_multi()
1027 		snl_parse_nlmsg(ss, hdr, &snl_donemsg_parser, e);  in snl_read_reply_multi()
1041 	struct snl_state	*ss;  member
1046 snl_init_writer(struct snl_state *ss, struct snl_writer *nw)  in snl_init_writer()  argument
1049 	nw->base = (char *)snl_allocz(ss, nw->size);  in snl_init_writer()
1058 	nw->ss = ss;  in snl_init_writer()
1072 	if (snl_allocz(nw->ss, new_size) == NULL) {  in snl_realloc_msg_buffer()
1078 	void *new_base = nw->ss->lb->base;  in snl_realloc_msg_buffer()
1295 		hdr->nlmsg_seq = snl_get_seq(nw->ss);  in snl_finalize_msg()
1311 	return (snl_send(nw->ss, nw->base, offset));  in snl_send_msgs()