diff --git a/sys/netlink/netlink_snl.h b/sys/netlink/netlink_snl.h index 5844994b5e47..6d97c1afd4ee 100644 --- a/sys/netlink/netlink_snl.h +++ b/sys/netlink/netlink_snl.h @@ -1,1107 +1,1189 @@ /*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2022 Alexander V. Chernikov * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _NETLINK_NETLINK_SNL_H_ #define _NETLINK_NETLINK_SNL_H_ /* * Simple Netlink Library */ #include #include #include #include #include #include #include #include #include #include #include #define _roundup2(x, y) (((x)+((y)-1))&(~((y)-1))) #define NETLINK_ALIGN_SIZE sizeof(uint32_t) #define NETLINK_ALIGN(_len) _roundup2(_len, NETLINK_ALIGN_SIZE) #define NLA_ALIGN_SIZE sizeof(uint32_t) #define NLA_HDRLEN ((int)sizeof(struct nlattr)) #define NLA_DATA_LEN(_nla) ((int)((_nla)->nla_len - NLA_HDRLEN)) #define NLA_DATA(_nla) NL_ITEM_DATA(_nla, NLA_HDRLEN) #define NLA_DATA_CONST(_nla) NL_ITEM_DATA_CONST(_nla, NLA_HDRLEN) #define NLA_TYPE(_nla) ((_nla)->nla_type & 0x3FFF) #define NLA_NEXT(_attr) (struct nlattr *)(void *)((char *)_attr + NLA_ALIGN(_attr->nla_len)) #define _NLA_END(_start, _len) ((char *)(_start) + (_len)) #define NLA_FOREACH(_attr, _start, _len) \ for (_attr = (_start); \ ((char *)_attr < _NLA_END(_start, _len)) && \ ((char *)NLA_NEXT(_attr) <= _NLA_END(_start, _len)); \ _attr = NLA_NEXT(_attr)) #define NL_ARRAY_LEN(_a) (sizeof(_a) / sizeof((_a)[0])) struct linear_buffer { char *base; /* Base allocated memory pointer */ uint32_t offset; /* Currently used offset */ uint32_t size; /* Total buffer size */ struct linear_buffer *next; /* Buffer chaining */ }; static inline struct linear_buffer * lb_init(uint32_t size) { struct linear_buffer *lb = calloc(1, size); if (lb != NULL) { lb->base = (char *)(lb + 1); lb->size = size - sizeof(*lb); } return (lb); } static inline void lb_free(struct linear_buffer *lb) { free(lb); } static inline char * lb_allocz(struct linear_buffer *lb, int len) { len = roundup2(len, sizeof(uint64_t)); if (lb->offset + len > lb->size) return (NULL); void *data = (void *)(lb->base + lb->offset); lb->offset += len; return (data); } static inline void lb_clear(struct linear_buffer *lb) { memset(lb->base, 0, lb->offset); lb->offset = 0; } struct snl_state { int fd; char *buf; size_t off; size_t bufsize; size_t datalen; uint32_t seq; bool init_done; struct linear_buffer *lb; }; #define SCRATCH_BUFFER_SIZE 1024 #define SNL_WRITER_BUFFER_SIZE 256 typedef void snl_parse_field_f(struct snl_state *ss, void *hdr, void *target); struct snl_field_parser { uint16_t off_in; uint16_t off_out; snl_parse_field_f *cb; }; typedef bool snl_parse_attr_f(struct snl_state *ss, struct nlattr *attr, const void *arg, void *target); struct snl_attr_parser { uint16_t type; /* Attribute type */ uint16_t off; /* field offset in the target structure */ snl_parse_attr_f *cb; /* parser function to call */ /* Optional parser argument */ union { const void *arg; const uint32_t arg_u32; }; }; typedef bool snl_parse_post_f(struct snl_state *ss, void *target); struct snl_hdr_parser { - int hdr_off; /* aligned header size */ - int fp_size; - int np_size; + uint16_t in_hdr_size; /* Input header size */ + uint16_t out_size; /* Output structure size */ + uint16_t fp_size; /* Number of items in field parser */ + uint16_t np_size; /* Number of items in attribute parser */ const struct snl_field_parser *fp; /* array of header field parsers */ const struct snl_attr_parser *np; /* array of attribute parsers */ snl_parse_post_f *cb_post; /* post-parse callback */ }; -#define SNL_DECLARE_PARSER_EXT(_name, _t, _fp, _np, _cb) \ -static const struct snl_hdr_parser _name = { \ - .hdr_off = sizeof(_t), \ - .fp = &((_fp)[0]), \ - .np = &((_np)[0]), \ - .fp_size = NL_ARRAY_LEN(_fp), \ - .np_size = NL_ARRAY_LEN(_np), \ - .cb_post = _cb, \ +#define SNL_DECLARE_PARSER_EXT(_name, _sz_h_in, _sz_out, _fp, _np, _cb) \ +static const struct snl_hdr_parser _name = { \ + .in_hdr_size = _sz_h_in, \ + .out_size = _sz_out, \ + .fp = &((_fp)[0]), \ + .np = &((_np)[0]), \ + .fp_size = NL_ARRAY_LEN(_fp), \ + .np_size = NL_ARRAY_LEN(_np), \ + .cb_post = _cb, \ } -#define SNL_DECLARE_PARSER(_name, _t, _fp, _np) \ - SNL_DECLARE_PARSER_EXT(_name, _t, _fp, _np, NULL) +#define SNL_DECLARE_PARSER(_name, _t, _fp, _np) \ + SNL_DECLARE_PARSER_EXT(_name, sizeof(_t), 0, _fp, _np, NULL) -#define SNL_DECLARE_ATTR_PARSER(_name, _np) \ -static const struct snl_hdr_parser _name = { \ - .np = &((_np)[0]), \ - .np_size = NL_ARRAY_LEN(_np), \ +#define SNL_DECLARE_ATTR_PARSER_EXT(_name, _sz_out, _np, _cb) \ +static const struct snl_hdr_parser _name = { \ + .out_size = _sz_out, \ + .np = &((_np)[0]), \ + .np_size = NL_ARRAY_LEN(_np), \ + .cb_post = _cb, \ } +#define SNL_DECLARE_ATTR_PARSER(_name, _np) \ + SNL_DECLARE_ATTR_PARSER_EXT(_name, 0, _np, NULL) + static inline void * snl_allocz(struct snl_state *ss, int len) { void *data = lb_allocz(ss->lb, len); if (data == NULL) { uint32_t size = ss->lb->size * 2; while (size < len + sizeof(struct linear_buffer)) size *= 2; struct linear_buffer *lb = lb_init(size); if (lb != NULL) { lb->next = ss->lb; ss->lb = lb; data = lb_allocz(ss->lb, len); } } return (data); } static inline void snl_clear_lb(struct snl_state *ss) { struct linear_buffer *lb = ss->lb; lb_clear(lb); lb = lb->next; ss->lb->next = NULL; /* Remove all linear bufs except the largest one */ while (lb != NULL) { struct linear_buffer *lb_next = lb->next; lb_free(lb); lb = lb_next; } } static void snl_free(struct snl_state *ss) { if (ss->init_done) { close(ss->fd); if (ss->buf != NULL) free(ss->buf); if (ss->lb != NULL) { snl_clear_lb(ss); lb_free(ss->lb); } } } static inline bool snl_init(struct snl_state *ss, int netlink_family) { memset(ss, 0, sizeof(*ss)); ss->fd = socket(AF_NETLINK, SOCK_RAW, netlink_family); if (ss->fd == -1) return (false); ss->init_done = true; int val = 1; socklen_t optlen = sizeof(val); if (setsockopt(ss->fd, SOL_NETLINK, NETLINK_EXT_ACK, &val, optlen) == -1) { snl_free(ss); return (false); } int rcvbuf; if (getsockopt(ss->fd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, &optlen) == -1) { snl_free(ss); return (false); } ss->bufsize = rcvbuf; ss->buf = malloc(ss->bufsize); if (ss->buf == NULL) { snl_free(ss); return (false); } ss->lb = lb_init(SCRATCH_BUFFER_SIZE); if (ss->lb == NULL) { snl_free(ss); return (false); } return (true); } static inline bool snl_send(struct snl_state *ss, void *data, int sz) { return (send(ss->fd, data, sz, 0) == sz); } static inline bool snl_send_message(struct snl_state *ss, struct nlmsghdr *hdr) { ssize_t sz = NLMSG_ALIGN(hdr->nlmsg_len); return (send(ss->fd, hdr, sz, 0) == sz); } static inline uint32_t snl_get_seq(struct snl_state *ss) { return (++ss->seq); } struct snl_msg_info { int cmsg_type; int cmsg_level; uint32_t process_id; uint8_t port_id; uint8_t seq_id; }; static inline bool parse_cmsg(struct snl_state *ss, const struct msghdr *msg, struct snl_msg_info *attrs); static inline struct nlmsghdr * snl_read_message_dbg(struct snl_state *ss, struct snl_msg_info *cinfo) { memset(cinfo, 0, sizeof(*cinfo)); if (ss->off == ss->datalen) { struct sockaddr_nl nladdr; char cbuf[64]; struct iovec iov = { .iov_base = ss->buf, .iov_len = ss->bufsize, }; struct msghdr msg = { .msg_name = &nladdr, .msg_namelen = sizeof(nladdr), .msg_iov = &iov, .msg_iovlen = 1, .msg_control = cbuf, .msg_controllen = sizeof(cbuf), }; ss->off = 0; ss->datalen = 0; for (;;) { ssize_t datalen = recvmsg(ss->fd, &msg, 0); if (datalen > 0) { ss->datalen = datalen; parse_cmsg(ss, &msg, cinfo); break; } else if (errno != EINTR) return (NULL); } } struct nlmsghdr *hdr = (struct nlmsghdr *)(void *)&ss->buf[ss->off]; ss->off += NLMSG_ALIGN(hdr->nlmsg_len); return (hdr); } static inline struct nlmsghdr * snl_read_message(struct snl_state *ss) { if (ss->off == ss->datalen) { struct sockaddr_nl nladdr; struct iovec iov = { .iov_base = ss->buf, .iov_len = ss->bufsize, }; struct msghdr msg = { .msg_name = &nladdr, .msg_namelen = sizeof(nladdr), .msg_iov = &iov, .msg_iovlen = 1, }; ss->off = 0; ss->datalen = 0; for (;;) { ssize_t datalen = recvmsg(ss->fd, &msg, 0); if (datalen > 0) { ss->datalen = datalen; break; } else if (errno != EINTR) return (NULL); } } struct nlmsghdr *hdr = (struct nlmsghdr *)(void *)&ss->buf[ss->off]; ss->off += NLMSG_ALIGN(hdr->nlmsg_len); return (hdr); } static inline struct nlmsghdr * snl_read_reply(struct snl_state *ss, uint32_t nlmsg_seq) { struct nlmsghdr *hdr; while ((hdr = snl_read_message(ss)) != NULL) { if (hdr->nlmsg_seq == nlmsg_seq) return (hdr); } return (NULL); } /* * Checks that attributes are sorted by attribute type. */ static inline void snl_verify_parsers(const struct snl_hdr_parser **parser, int count) { for (int i = 0; i < count; i++) { const struct snl_hdr_parser *p = parser[i]; int attr_type = 0; for (int j = 0; j < p->np_size; j++) { assert(p->np[j].type > attr_type); attr_type = p->np[j].type; } } } #define SNL_VERIFY_PARSERS(_p) snl_verify_parsers((_p), NL_ARRAY_LEN(_p)) static const struct snl_attr_parser * find_parser(const struct snl_attr_parser *ps, int pslen, int key) { int left_i = 0, right_i = pslen - 1; if (key < ps[0].type || key > ps[pslen - 1].type) return (NULL); while (left_i + 1 < right_i) { int mid_i = (left_i + right_i) / 2; if (key < ps[mid_i].type) right_i = mid_i; else if (key > ps[mid_i].type) left_i = mid_i + 1; else return (&ps[mid_i]); } if (ps[left_i].type == key) return (&ps[left_i]); else if (ps[right_i].type == key) return (&ps[right_i]); return (NULL); } static inline bool snl_parse_attrs_raw(struct snl_state *ss, struct nlattr *nla_head, int len, const struct snl_attr_parser *ps, int pslen, void *target) { struct nlattr *nla; NLA_FOREACH(nla, nla_head, len) { if (nla->nla_len < sizeof(struct nlattr)) return (false); int nla_type = nla->nla_type & NLA_TYPE_MASK; const struct snl_attr_parser *s = find_parser(ps, pslen, nla_type); if (s != NULL) { void *ptr = (void *)((char *)target + s->off); if (!s->cb(ss, nla, s->arg, ptr)) return (false); } } return (true); } static inline bool snl_parse_attrs(struct snl_state *ss, struct nlmsghdr *hdr, int hdrlen, const struct snl_attr_parser *ps, int pslen, void *target) { int off = NLMSG_HDRLEN + NETLINK_ALIGN(hdrlen); int len = hdr->nlmsg_len - off; struct nlattr *nla_head = (struct nlattr *)(void *)((char *)hdr + off); return (snl_parse_attrs_raw(ss, nla_head, len, ps, pslen, target)); } static inline void snl_parse_fields(struct snl_state *ss, struct nlmsghdr *hdr, int hdrlen __unused, const struct snl_field_parser *ps, int pslen, void *target) { for (int i = 0; i < pslen; i++) { const struct snl_field_parser *fp = &ps[i]; void *src = (char *)hdr + fp->off_in; void *dst = (char *)target + fp->off_out; fp->cb(ss, src, dst); } } static inline bool snl_parse_header(struct snl_state *ss, void *hdr, int len, const struct snl_hdr_parser *parser, void *target) { + struct nlattr *nla_head; + /* Extract fields first (if any) */ - snl_parse_fields(ss, hdr, parser->hdr_off, parser->fp, parser->fp_size, target); + snl_parse_fields(ss, hdr, parser->in_hdr_size, parser->fp, parser->fp_size, target); - struct nlattr *nla_head = (struct nlattr *)(void *)((char *)hdr + parser->hdr_off); - bool result = snl_parse_attrs_raw(ss, nla_head, len - parser->hdr_off, + nla_head = (struct nlattr *)(void *)((char *)hdr + parser->in_hdr_size); + bool result = snl_parse_attrs_raw(ss, nla_head, len - parser->in_hdr_size, parser->np, parser->np_size, target); if (result && parser->cb_post != NULL) result = parser->cb_post(ss, target); return (result); } static inline bool snl_parse_nlmsg(struct snl_state *ss, struct nlmsghdr *hdr, const struct snl_hdr_parser *parser, void *target) { return (snl_parse_header(ss, hdr + 1, hdr->nlmsg_len - sizeof(*hdr), parser, target)); } static inline bool snl_attr_get_flag(struct snl_state *ss __unused, struct nlattr *nla, const void *arg __unused, void *target) { if (NLA_DATA_LEN(nla) == 0) { *((uint8_t *)target) = 1; return (true); } return (false); } static inline bool snl_attr_get_uint8(struct snl_state *ss __unused, struct nlattr *nla, const void *arg __unused, void *target) { if (NLA_DATA_LEN(nla) == sizeof(uint8_t)) { *((uint8_t *)target) = *((const uint8_t *)NLA_DATA_CONST(nla)); return (true); } return (false); } static inline bool snl_attr_get_uint16(struct snl_state *ss __unused, struct nlattr *nla, const void *arg __unused, void *target) { if (NLA_DATA_LEN(nla) == sizeof(uint16_t)) { *((uint16_t *)target) = *((const uint16_t *)NLA_DATA_CONST(nla)); return (true); } return (false); } static inline bool snl_attr_get_uint32(struct snl_state *ss __unused, struct nlattr *nla, const void *arg __unused, void *target) { if (NLA_DATA_LEN(nla) == sizeof(uint32_t)) { *((uint32_t *)target) = *((const uint32_t *)NLA_DATA_CONST(nla)); return (true); } return (false); } static inline bool snl_attr_get_uint64(struct snl_state *ss __unused, struct nlattr *nla, const void *arg __unused, void *target) { if (NLA_DATA_LEN(nla) == sizeof(uint64_t)) { memcpy(target, NLA_DATA_CONST(nla), sizeof(uint64_t)); return (true); } return (false); } static inline bool snl_attr_get_int8(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target) { return (snl_attr_get_uint8(ss, nla, arg, target)); } static inline bool snl_attr_get_int16(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target) { return (snl_attr_get_uint16(ss, nla, arg, target)); } static inline bool snl_attr_get_int32(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target) { return (snl_attr_get_uint32(ss, nla, arg, target)); } static inline bool snl_attr_get_int64(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target) { return (snl_attr_get_uint64(ss, nla, arg, target)); } static inline bool snl_attr_get_string(struct snl_state *ss __unused, struct nlattr *nla, const void *arg __unused, void *target) { size_t maxlen = NLA_DATA_LEN(nla); if (strnlen((char *)NLA_DATA(nla), maxlen) < maxlen) { *((char **)target) = (char *)NLA_DATA(nla); return (true); } return (false); } static inline bool snl_attr_get_stringn(struct snl_state *ss, struct nlattr *nla, const void *arg __unused, void *target) { int maxlen = NLA_DATA_LEN(nla); char *buf = snl_allocz(ss, maxlen + 1); if (buf == NULL) return (false); buf[maxlen] = '\0'; memcpy(buf, NLA_DATA(nla), maxlen); *((char **)target) = buf; return (true); } static inline bool snl_attr_copy_string(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target) { char *tmp; if (snl_attr_get_string(ss, nla, NULL, &tmp)) { strlcpy(target, tmp, (size_t)arg); return (true); } return (false); } static inline bool snl_attr_dup_string(struct snl_state *ss __unused, struct nlattr *nla, const void *arg __unused, void *target) { size_t maxlen = NLA_DATA_LEN(nla); if (strnlen((char *)NLA_DATA(nla), maxlen) < maxlen) { char *buf = snl_allocz(ss, maxlen); if (buf == NULL) return (false); memcpy(buf, NLA_DATA(nla), maxlen); *((char **)target) = buf; return (true); } return (false); } static inline bool snl_attr_get_nested(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target) { const struct snl_hdr_parser *p = (const struct snl_hdr_parser *)arg; /* Assumes target points to the beginning of the structure */ return (snl_parse_header(ss, NLA_DATA(nla), NLA_DATA_LEN(nla), p, target)); } +struct snl_parray { + uint32_t count; + void **items; +}; + +static inline bool +snl_attr_get_parray_sz(struct snl_state *ss, struct nlattr *container_nla, + uint32_t start_size, const void *arg, void *target) +{ + const struct snl_hdr_parser *p = (const struct snl_hdr_parser *)arg; + struct snl_parray *array = target; + struct nlattr *nla; + uint32_t count = 0, size = start_size; + + if (p->out_size == 0) + return (false); + + array->items = snl_allocz(ss, size * sizeof(void *)); + if (array->items == NULL) + return (false); + + /* + * If the provided parser is an attribute parser, assume that each + * nla in the container nla is the container nla itself and parse + * the contents of this nla. + * Otherwise, run the parser on raw data, assuming the header of this + * data has u16 field with total size in the beginning. + */ + uint32_t data_off = 0; + + if (p->in_hdr_size == 0) + data_off = sizeof(struct nlattr); + + NLA_FOREACH(nla, NLA_DATA(container_nla), NLA_DATA_LEN(container_nla)) { + void *item = snl_allocz(ss, p->out_size); + + if (item == NULL) + return (false); + + void *data = (char *)(void *)nla + data_off; + int data_len = nla->nla_len - data_off; + + if (!(snl_parse_header(ss, data, data_len, p, item))) + return (false); + + if (count == size) { + uint32_t new_size = size * 2; + void **new_array = snl_allocz(ss, new_size *sizeof(void *)); + + memcpy(new_array, array->items, size * sizeof(void *)); + array->items = new_array; + size = new_size; + } + array->items[count++] = item; + } + array->count = count; + + return (true); +} + +/* + * Parses and stores the unknown-size array. + * Assumes each array item is a container and the NLAs in the container are parsable + * by the parser provided in @arg. + * Assumes @target is struct snl_parray + */ +static inline bool +snl_attr_get_parray(struct snl_state *ss, struct nlattr *nla, const void *arg, void *target) +{ + return (snl_attr_get_parray_sz(ss, nla, 8, arg, target)); +} + static inline bool snl_attr_get_nla(struct snl_state *ss __unused, struct nlattr *nla, const void *arg __unused, void *target) { *((struct nlattr **)target) = nla; return (true); } static inline bool snl_attr_dup_nla(struct snl_state *ss __unused, struct nlattr *nla, const void *arg __unused, void *target) { void *ptr = snl_allocz(ss, nla->nla_len); if (ptr != NULL) { memcpy(ptr, nla, nla->nla_len); *((void **)target) = ptr; return (true); } return (false); } static inline bool snl_attr_copy_struct(struct snl_state *ss, struct nlattr *nla, const void *arg __unused, void *target) { void *ptr = snl_allocz(ss, NLA_DATA_LEN(nla)); if (ptr != NULL) { memcpy(ptr, NLA_DATA(nla), NLA_DATA_LEN(nla)); *((void **)target) = ptr; return (true); } return (false); } static inline bool snl_attr_dup_struct(struct snl_state *ss, struct nlattr *nla, const void *arg __unused, void *target) { void *ptr = snl_allocz(ss, NLA_DATA_LEN(nla)); if (ptr != NULL) { memcpy(ptr, NLA_DATA(nla), NLA_DATA_LEN(nla)); *((void **)target) = ptr; return (true); } return (false); } static inline void snl_field_get_uint8(struct snl_state *ss __unused, void *src, void *target) { *((uint8_t *)target) = *((uint8_t *)src); } static inline void snl_field_get_uint16(struct snl_state *ss __unused, void *src, void *target) { *((uint16_t *)target) = *((uint16_t *)src); } static inline void snl_field_get_uint32(struct snl_state *ss __unused, void *src, void *target) { *((uint32_t *)target) = *((uint32_t *)src); } static inline void snl_field_get_ptr(struct snl_state *ss __unused, void *src, void *target) { *((void **)target) = src; } struct snl_errmsg_data { struct nlmsghdr *orig_hdr; int error; uint32_t error_offs; char *error_str; struct nlattr *cookie; }; #define _IN(_field) offsetof(struct nlmsgerr, _field) #define _OUT(_field) offsetof(struct snl_errmsg_data, _field) static const struct snl_attr_parser nla_p_errmsg[] = { { .type = NLMSGERR_ATTR_MSG, .off = _OUT(error_str), .cb = snl_attr_get_string }, { .type = NLMSGERR_ATTR_OFFS, .off = _OUT(error_offs), .cb = snl_attr_get_uint32 }, { .type = NLMSGERR_ATTR_COOKIE, .off = _OUT(cookie), .cb = snl_attr_get_nla }, }; static const struct snl_field_parser nlf_p_errmsg[] = { { .off_in = _IN(error), .off_out = _OUT(error), .cb = snl_field_get_uint32 }, { .off_in = _IN(msg), .off_out = _OUT(orig_hdr), .cb = snl_field_get_ptr }, }; #undef _IN #undef _OUT SNL_DECLARE_PARSER(snl_errmsg_parser, struct nlmsgerr, nlf_p_errmsg, nla_p_errmsg); #define _IN(_field) offsetof(struct nlmsgerr, _field) #define _OUT(_field) offsetof(struct snl_errmsg_data, _field) static const struct snl_attr_parser nla_p_donemsg[] = {}; static const struct snl_field_parser nlf_p_donemsg[] = { { .off_in = _IN(error), .off_out = _OUT(error), .cb = snl_field_get_uint32 }, }; #undef _IN #undef _OUT SNL_DECLARE_PARSER(snl_donemsg_parser, struct nlmsgerr, nlf_p_donemsg, nla_p_donemsg); static inline bool snl_parse_errmsg(struct snl_state *ss, struct nlmsghdr *hdr, struct snl_errmsg_data *e) { if ((hdr->nlmsg_flags & NLM_F_CAPPED) != 0) return (snl_parse_nlmsg(ss, hdr, &snl_errmsg_parser, e)); const struct snl_hdr_parser *ps = &snl_errmsg_parser; struct nlmsgerr *errmsg = (struct nlmsgerr *)(hdr + 1); int hdrlen = sizeof(int) + NLMSG_ALIGN(errmsg->msg.nlmsg_len); struct nlattr *attr_head = (struct nlattr *)(void *)((char *)errmsg + hdrlen); int attr_len = hdr->nlmsg_len - sizeof(struct nlmsghdr) - hdrlen; snl_parse_fields(ss, (struct nlmsghdr *)errmsg, hdrlen, ps->fp, ps->fp_size, e); return (snl_parse_attrs_raw(ss, attr_head, attr_len, ps->np, ps->np_size, e)); } static inline bool snl_read_reply_code(struct snl_state *ss, uint32_t nlmsg_seq, struct snl_errmsg_data *e) { struct nlmsghdr *hdr = snl_read_reply(ss, nlmsg_seq); if (hdr == NULL) { e->error = EINVAL; } else if (hdr->nlmsg_type == NLMSG_ERROR) { if (!snl_parse_errmsg(ss, hdr, e)) e->error = EINVAL; return (e->error == 0); } return (false); } #define _OUT(_field) offsetof(struct snl_msg_info, _field) static const struct snl_attr_parser _nla_p_cinfo[] = { { .type = NLMSGINFO_ATTR_PROCESS_ID, .off = _OUT(process_id), .cb = snl_attr_get_uint32 }, { .type = NLMSGINFO_ATTR_PORT_ID, .off = _OUT(port_id), .cb = snl_attr_get_uint32 }, { .type = NLMSGINFO_ATTR_SEQ_ID, .off = _OUT(seq_id), .cb = snl_attr_get_uint32 }, }; #undef _OUT SNL_DECLARE_ATTR_PARSER(snl_msg_info_parser, _nla_p_cinfo); static inline bool parse_cmsg(struct snl_state *ss, const struct msghdr *msg, struct snl_msg_info *attrs) { for (struct cmsghdr *cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL; cmsg = CMSG_NXTHDR(msg, cmsg)) { if (cmsg->cmsg_level != SOL_NETLINK || cmsg->cmsg_type != NETLINK_MSG_INFO) continue; void *data = CMSG_DATA(cmsg); int len = cmsg->cmsg_len - ((char *)data - (char *)cmsg); const struct snl_hdr_parser *ps = &snl_msg_info_parser; return (snl_parse_attrs_raw(ss, data, len, ps->np, ps->np_size, attrs)); } return (false); } /* * Assumes e is zeroed */ static inline struct nlmsghdr * snl_read_reply_multi(struct snl_state *ss, uint32_t nlmsg_seq, struct snl_errmsg_data *e) { struct nlmsghdr *hdr = snl_read_reply(ss, nlmsg_seq); if (hdr == NULL) { e->error = EINVAL; } else if (hdr->nlmsg_type == NLMSG_ERROR) { if (!snl_parse_errmsg(ss, hdr, e)) e->error = EINVAL; } else if (hdr->nlmsg_type == NLMSG_DONE) { snl_parse_nlmsg(ss, hdr, &snl_donemsg_parser, e); } else return (hdr); return (NULL); } /* writer logic */ struct snl_writer { char *base; uint32_t offset; uint32_t size; struct nlmsghdr *hdr; struct snl_state *ss; bool error; }; static inline void snl_init_writer(struct snl_state *ss, struct snl_writer *nw) { nw->size = SNL_WRITER_BUFFER_SIZE; nw->base = snl_allocz(ss, nw->size); if (nw->base == NULL) { nw->error = true; nw->size = 0; } nw->offset = 0; nw->hdr = NULL; nw->error = false; nw->ss = ss; } static inline bool snl_realloc_msg_buffer(struct snl_writer *nw, size_t sz) { uint32_t new_size = nw->size * 2; while (new_size < nw->size + sz) new_size *= 2; if (nw->error) return (false); void *new_base = snl_allocz(nw->ss, new_size); if (new_base == NULL) { nw->error = true; return (false); } memcpy(new_base, nw->base, nw->offset); if (nw->hdr != NULL) { int hdr_off = (char *)(nw->hdr) - nw->base; + nw->hdr = (struct nlmsghdr *)(void *)((char *)new_base + hdr_off); } nw->base = new_base; return (true); } static inline void * snl_reserve_msg_data_raw(struct snl_writer *nw, size_t sz) { sz = NETLINK_ALIGN(sz); if (__predict_false(nw->offset + sz > nw->size)) { if (!snl_realloc_msg_buffer(nw, sz)) return (NULL); } void *data_ptr = &nw->base[nw->offset]; nw->offset += sz; return (data_ptr); } #define snl_reserve_msg_object(_ns, _t) ((_t *)snl_reserve_msg_data_raw(_ns, sizeof(_t))) #define snl_reserve_msg_data(_ns, _sz, _t) ((_t *)snl_reserve_msg_data_raw(_ns, _sz)) static inline void * _snl_reserve_msg_attr(struct snl_writer *nw, uint16_t nla_type, uint16_t sz) { sz += sizeof(struct nlattr); struct nlattr *nla = snl_reserve_msg_data(nw, sz, struct nlattr); if (__predict_false(nla == NULL)) return (NULL); nla->nla_type = nla_type; nla->nla_len = sz; return ((void *)(nla + 1)); } #define snl_reserve_msg_attr(_ns, _at, _t) ((_t *)_snl_reserve_msg_attr(_ns, _at, sizeof(_t))) static inline bool snl_add_msg_attr(struct snl_writer *nw, int attr_type, int attr_len, const void *data) { int required_len = NLA_ALIGN(attr_len + sizeof(struct nlattr)); if (__predict_false(nw->offset + required_len > nw->size)) { if (!snl_realloc_msg_buffer(nw, required_len)) return (false); } struct nlattr *nla = (struct nlattr *)(void *)(&nw->base[nw->offset]); nla->nla_len = attr_len + sizeof(struct nlattr); nla->nla_type = attr_type; if (attr_len > 0) { if ((attr_len % 4) != 0) { /* clear padding bytes */ bzero((char *)nla + required_len - 4, 4); } memcpy((nla + 1), data, attr_len); } nw->offset += required_len; return (true); } static inline bool snl_add_msg_attr_raw(struct snl_writer *nw, const struct nlattr *nla_src) { int attr_len = nla_src->nla_len - sizeof(struct nlattr); assert(attr_len >= 0); return (snl_add_msg_attr(nw, nla_src->nla_type, attr_len, (const void *)(nla_src + 1))); } static inline bool snl_add_msg_attr_u8(struct snl_writer *nw, int attrtype, uint8_t value) { return (snl_add_msg_attr(nw, attrtype, sizeof(uint8_t), &value)); } static inline bool snl_add_msg_attr_u16(struct snl_writer *nw, int attrtype, uint16_t value) { return (snl_add_msg_attr(nw, attrtype, sizeof(uint16_t), &value)); } static inline bool snl_add_msg_attr_u32(struct snl_writer *nw, int attrtype, uint32_t value) { return (snl_add_msg_attr(nw, attrtype, sizeof(uint32_t), &value)); } static inline bool snl_add_msg_attr_u64(struct snl_writer *nw, int attrtype, uint64_t value) { return (snl_add_msg_attr(nw, attrtype, sizeof(uint64_t), &value)); } static inline bool snl_add_msg_attr_s8(struct snl_writer *nw, int attrtype, int8_t value) { return (snl_add_msg_attr(nw, attrtype, sizeof(int8_t), &value)); } static inline bool snl_add_msg_attr_s16(struct snl_writer *nw, int attrtype, int16_t value) { return (snl_add_msg_attr(nw, attrtype, sizeof(int16_t), &value)); } static inline bool snl_add_msg_attr_s32(struct snl_writer *nw, int attrtype, int32_t value) { return (snl_add_msg_attr(nw, attrtype, sizeof(int32_t), &value)); } static inline bool snl_add_msg_attr_s64(struct snl_writer *nw, int attrtype, int64_t value) { return (snl_add_msg_attr(nw, attrtype, sizeof(int64_t), &value)); } static inline bool snl_add_msg_attr_flag(struct snl_writer *nw, int attrtype) { return (snl_add_msg_attr(nw, attrtype, 0, NULL)); } static inline bool snl_add_msg_attr_string(struct snl_writer *nw, int attrtype, const char *str) { return (snl_add_msg_attr(nw, attrtype, strlen(str) + 1, str)); } static inline int snl_get_msg_offset(const struct snl_writer *nw) { return (nw->offset - ((char *)nw->hdr - nw->base)); } static inline void * _snl_restore_msg_offset(const struct snl_writer *nw, int off) { return ((void *)((char *)nw->hdr + off)); } #define snl_restore_msg_offset(_ns, _off, _t) ((_t *)_snl_restore_msg_offset(_ns, _off)) static inline int snl_add_msg_attr_nested(struct snl_writer *nw, int attrtype) { int off = snl_get_msg_offset(nw); struct nlattr *nla = snl_reserve_msg_data(nw, sizeof(struct nlattr), struct nlattr); if (__predict_false(nla == NULL)) return (0); nla->nla_type = attrtype; return (off); } static inline void snl_end_attr_nested(const struct snl_writer *nw, int off) { if (!nw->error) { struct nlattr *nla = snl_restore_msg_offset(nw, off, struct nlattr); nla->nla_len = NETLINK_ALIGN(snl_get_msg_offset(nw) - off); } } static inline struct nlmsghdr * snl_create_msg_request(struct snl_writer *nw, int nlmsg_type) { assert(nw->hdr == NULL); struct nlmsghdr *hdr = snl_reserve_msg_object(nw, struct nlmsghdr); hdr->nlmsg_type = nlmsg_type; hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK; nw->hdr = hdr; return (hdr); } static void snl_abort_msg(struct snl_writer *nw) { if (nw->hdr != NULL) { int offset = (char *)(&nw->base[nw->offset]) - (char *)(nw->hdr); nw->offset -= offset; nw->hdr = NULL; } } static inline struct nlmsghdr * snl_finalize_msg(struct snl_writer *nw) { if (nw->error) snl_abort_msg(nw); if (nw->hdr != NULL) { struct nlmsghdr *hdr = nw->hdr; int offset = (char *)(&nw->base[nw->offset]) - (char *)(nw->hdr); hdr->nlmsg_len = offset; hdr->nlmsg_seq = snl_get_seq(nw->ss); nw->hdr = NULL; return (hdr); } return (NULL); } static inline bool snl_send_msgs(struct snl_writer *nw) { int offset = nw->offset; assert(nw->hdr == NULL); nw->offset = 0; return (snl_send(nw->ss, nw->base, offset)); } static const struct snl_hdr_parser *snl_all_core_parsers[] = { &snl_errmsg_parser, &snl_donemsg_parser, }; #endif diff --git a/sys/netlink/netlink_snl_route_parsers.h b/sys/netlink/netlink_snl_route_parsers.h index c76e1cd6440a..0ab338cbe6e8 100644 --- a/sys/netlink/netlink_snl_route_parsers.h +++ b/sys/netlink/netlink_snl_route_parsers.h @@ -1,409 +1,418 @@ /*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c) 2023 Alexander V. Chernikov * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _NETLINK_NETLINK_SNL_ROUTE_PARSERS_H_ #define _NETLINK_NETLINK_SNL_ROUTE_PARSERS_H_ #include #include #include /* TODO: this file should be generated automatically */ static inline void finalize_sockaddr(struct sockaddr *sa, uint32_t ifindex) { if (sa != NULL && sa->sa_family == AF_INET6) { struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)(void *)sa; if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) sin6->sin6_scope_id = ifindex; } } /* RTM_ROUTE message parser */ struct rta_mpath_nh { struct sockaddr *gw; uint32_t ifindex; uint8_t rtnh_flags; uint8_t rtnh_weight; uint32_t rtax_mtu; uint32_t rta_rtflags; }; #define _IN(_field) offsetof(struct rtnexthop, _field) #define _OUT(_field) offsetof(struct rta_mpath_nh, _field) static const struct snl_attr_parser _nla_p_mp_nh_metrics[] = { { .type = NL_RTAX_MTU, .off = _OUT(rtax_mtu), .cb = snl_attr_get_uint32 }, }; SNL_DECLARE_ATTR_PARSER(_metrics_mp_nh_parser, _nla_p_mp_nh_metrics); static const struct snl_attr_parser _nla_p_mp_nh[] = { { .type = NL_RTA_GATEWAY, .off = _OUT(gw), .cb = snl_attr_get_ip }, { .type = NL_RTA_METRICS, .arg = &_metrics_mp_nh_parser, .cb = snl_attr_get_nested }, { .type = NL_RTA_RTFLAGS, .off = _OUT(rta_rtflags), .cb = snl_attr_get_uint32 }, { .type = NL_RTA_VIA, .off = _OUT(gw), .cb = snl_attr_get_ipvia }, }; static const struct snl_field_parser _fp_p_mp_nh[] = { { .off_in = _IN(rtnh_flags), .off_out = _OUT(rtnh_flags), .cb = snl_field_get_uint8 }, { .off_in = _IN(rtnh_hops), .off_out = _OUT(rtnh_weight), .cb = snl_field_get_uint8 }, { .off_in = _IN(rtnh_ifindex), .off_out = _OUT(ifindex), .cb = snl_field_get_uint32 }, }; static inline bool _cb_p_mp_nh(struct snl_state *ss __unused, void *_target) { struct rta_mpath_nh *target = _target; finalize_sockaddr(target->gw, target->ifindex); return (true); } #undef _IN #undef _OUT -SNL_DECLARE_PARSER_EXT(_mpath_nh_parser, struct rtnexthop, _fp_p_mp_nh, _nla_p_mp_nh, _cb_p_mp_nh); +SNL_DECLARE_PARSER_EXT(_mpath_nh_parser, sizeof(struct rtnexthop), + sizeof(struct rta_mpath_nh), _fp_p_mp_nh, _nla_p_mp_nh, + _cb_p_mp_nh); struct rta_mpath { int num_nhops; struct rta_mpath_nh nhops[0]; }; static bool nlattr_get_multipath(struct snl_state *ss, struct nlattr *nla, const void *arg __unused, void *target) { int data_len = nla->nla_len - sizeof(struct nlattr); struct rtnexthop *rtnh; int max_nhops = data_len / sizeof(struct rtnexthop); size_t sz = (max_nhops + 2) * sizeof(struct rta_mpath_nh); struct rta_mpath *mp = snl_allocz(ss, sz); if (mp == NULL) return (false); mp->num_nhops = 0; for (rtnh = (struct rtnexthop *)(void *)(nla + 1); data_len > 0; ) { struct rta_mpath_nh *mpnh = &mp->nhops[mp->num_nhops++]; if (!snl_parse_header(ss, rtnh, rtnh->rtnh_len, &_mpath_nh_parser, mpnh)) return (false); int len = NL_ITEM_ALIGN(rtnh->rtnh_len); data_len -= len; rtnh = (struct rtnexthop *)(void *)((char *)rtnh + len); } if (data_len != 0 || mp->num_nhops == 0) { return (false); } *((struct rta_mpath **)target) = mp; return (true); } struct snl_parsed_route { struct sockaddr *rta_dst; struct sockaddr *rta_gw; struct nlattr *rta_metrics; struct rta_mpath *rta_multipath; uint32_t rta_expires; uint32_t rta_oif; uint32_t rta_expire; uint32_t rta_table; uint32_t rta_knh_id; uint32_t rta_nh_id; uint32_t rta_rtflags; uint32_t rtax_mtu; uint32_t rtax_weight; uint8_t rtm_family; uint8_t rtm_type; uint8_t rtm_protocol; uint8_t rtm_dst_len; }; #define _IN(_field) offsetof(struct rtmsg, _field) #define _OUT(_field) offsetof(struct snl_parsed_route, _field) static const struct snl_attr_parser _nla_p_rtmetrics[] = { { .type = NL_RTAX_MTU, .off = _OUT(rtax_mtu), .cb = snl_attr_get_uint32 }, }; SNL_DECLARE_ATTR_PARSER(_metrics_parser, _nla_p_rtmetrics); static const struct snl_attr_parser _nla_p_route[] = { { .type = NL_RTA_DST, .off = _OUT(rta_dst), .cb = snl_attr_get_ip }, { .type = NL_RTA_OIF, .off = _OUT(rta_oif), .cb = snl_attr_get_uint32 }, { .type = NL_RTA_GATEWAY, .off = _OUT(rta_gw), .cb = snl_attr_get_ip }, { .type = NL_RTA_METRICS, .arg = &_metrics_parser, .cb = snl_attr_get_nested }, { .type = NL_RTA_MULTIPATH, .off = _OUT(rta_multipath), .cb = nlattr_get_multipath }, { .type = NL_RTA_KNH_ID, .off = _OUT(rta_knh_id), .cb = snl_attr_get_uint32 }, { .type = NL_RTA_WEIGHT, .off = _OUT(rtax_weight), .cb = snl_attr_get_uint32 }, { .type = NL_RTA_RTFLAGS, .off = _OUT(rta_rtflags), .cb = snl_attr_get_uint32 }, { .type = NL_RTA_TABLE, .off = _OUT(rta_table), .cb = snl_attr_get_uint32 }, { .type = NL_RTA_VIA, .off = _OUT(rta_gw), .cb = snl_attr_get_ipvia }, { .type = NL_RTA_EXPIRES, .off = _OUT(rta_expire), .cb = snl_attr_get_uint32 }, { .type = NL_RTA_NH_ID, .off = _OUT(rta_nh_id), .cb = snl_attr_get_uint32 }, }; static const struct snl_field_parser _fp_p_route[] = { {.off_in = _IN(rtm_family), .off_out = _OUT(rtm_family), .cb = snl_field_get_uint8 }, {.off_in = _IN(rtm_type), .off_out = _OUT(rtm_type), .cb = snl_field_get_uint8 }, {.off_in = _IN(rtm_protocol), .off_out = _OUT(rtm_protocol), .cb = snl_field_get_uint8 }, {.off_in = _IN(rtm_dst_len), .off_out = _OUT(rtm_dst_len), .cb = snl_field_get_uint8 }, }; static inline bool _cb_p_route(struct snl_state *ss __unused, void *_target) { struct snl_parsed_route *target = _target; finalize_sockaddr(target->rta_dst, target->rta_oif); finalize_sockaddr(target->rta_gw, target->rta_oif); return (true); } #undef _IN #undef _OUT -SNL_DECLARE_PARSER_EXT(snl_rtm_route_parser, struct rtmsg, _fp_p_route, _nla_p_route, _cb_p_route); +SNL_DECLARE_PARSER_EXT(snl_rtm_route_parser, sizeof(struct rtmsg), + sizeof(struct snl_parsed_route), _fp_p_route, _nla_p_route, + _cb_p_route); /* RTM_LINK message parser */ struct snl_parsed_link { uint32_t ifi_index; uint32_t ifi_flags; uint32_t ifi_change; uint16_t ifi_type; uint8_t ifla_operstate; uint8_t ifla_carrier; uint32_t ifla_mtu; char *ifla_ifname; struct nlattr *ifla_address; struct nlattr *ifla_broadcast; char *ifla_ifalias; uint32_t ifla_promiscuity; struct rtnl_link_stats64 *ifla_stats64; struct nlattr *iflaf_orig_hwaddr; }; #define _IN(_field) offsetof(struct ifinfomsg, _field) #define _OUT(_field) offsetof(struct snl_parsed_link, _field) static const struct snl_attr_parser _nla_p_link_fbsd[] = { { .type = IFLAF_ORIG_HWADDR, .off = _OUT(iflaf_orig_hwaddr), .cb = snl_attr_dup_nla }, }; SNL_DECLARE_ATTR_PARSER(_link_fbsd_parser, _nla_p_link_fbsd); static const struct snl_attr_parser _nla_p_link[] = { { .type = IFLA_ADDRESS, .off = _OUT(ifla_address), .cb = snl_attr_dup_nla }, { .type = IFLA_BROADCAST, .off = _OUT(ifla_broadcast), .cb = snl_attr_dup_nla }, { .type = IFLA_IFNAME, .off = _OUT(ifla_ifname), .cb = snl_attr_dup_string }, { .type = IFLA_MTU, .off = _OUT(ifla_mtu), .cb = snl_attr_get_uint32 }, { .type = IFLA_OPERSTATE, .off = _OUT(ifla_operstate), .cb = snl_attr_get_uint8 }, { .type = IFLA_IFALIAS, .off = _OUT(ifla_ifalias), .cb = snl_attr_dup_string }, { .type = IFLA_STATS64, .off = _OUT(ifla_stats64), .cb = snl_attr_dup_struct }, { .type = IFLA_PROMISCUITY, .off = _OUT(ifla_promiscuity), .cb = snl_attr_get_uint32 }, { .type = IFLA_CARRIER, .off = _OUT(ifla_carrier), .cb = snl_attr_get_uint8 }, { .type = IFLA_FREEBSD, .arg = &_link_fbsd_parser, .cb = snl_attr_get_nested }, }; static const struct snl_field_parser _fp_p_link[] = { {.off_in = _IN(ifi_index), .off_out = _OUT(ifi_index), .cb = snl_field_get_uint32 }, {.off_in = _IN(ifi_flags), .off_out = _OUT(ifi_flags), .cb = snl_field_get_uint32 }, {.off_in = _IN(ifi_change), .off_out = _OUT(ifi_change), .cb = snl_field_get_uint32 }, {.off_in = _IN(ifi_type), .off_out = _OUT(ifi_type), .cb = snl_field_get_uint16 }, }; #undef _IN #undef _OUT SNL_DECLARE_PARSER(snl_rtm_link_parser, struct ifinfomsg, _fp_p_link, _nla_p_link); struct snl_parsed_link_simple { uint32_t ifi_index; uint32_t ifla_mtu; uint16_t ifi_type; uint32_t ifi_flags; char *ifla_ifname; }; #define _IN(_field) offsetof(struct ifinfomsg, _field) #define _OUT(_field) offsetof(struct snl_parsed_link_simple, _field) static struct snl_attr_parser _nla_p_link_s[] = { { .type = IFLA_IFNAME, .off = _OUT(ifla_ifname), .cb = snl_attr_dup_string }, { .type = IFLA_MTU, .off = _OUT(ifla_mtu), .cb = snl_attr_get_uint32 }, }; static struct snl_field_parser _fp_p_link_s[] = { {.off_in = _IN(ifi_index), .off_out = _OUT(ifi_index), .cb = snl_field_get_uint32 }, {.off_in = _IN(ifi_type), .off_out = _OUT(ifi_type), .cb = snl_field_get_uint16 }, {.off_in = _IN(ifi_flags), .off_out = _OUT(ifi_flags), .cb = snl_field_get_uint32 }, }; #undef _IN #undef _OUT SNL_DECLARE_PARSER(snl_rtm_link_parser_simple, struct ifinfomsg, _fp_p_link_s, _nla_p_link_s); struct snl_parsed_neigh { uint8_t ndm_family; uint8_t ndm_flags; uint16_t ndm_state; uint32_t nda_ifindex; uint32_t nda_probes; uint32_t ndaf_next_ts; struct sockaddr *nda_dst; struct nlattr *nda_lladdr; }; #define _IN(_field) offsetof(struct ndmsg, _field) #define _OUT(_field) offsetof(struct snl_parsed_neigh, _field) static const struct snl_attr_parser _nla_p_neigh_fbsd[] = { { .type = NDAF_NEXT_STATE_TS, .off = _OUT(ndaf_next_ts), .cb = snl_attr_get_uint32 }, }; SNL_DECLARE_ATTR_PARSER(_neigh_fbsd_parser, _nla_p_neigh_fbsd); static struct snl_attr_parser _nla_p_neigh_s[] = { { .type = NDA_DST, .off = _OUT(nda_dst), .cb = snl_attr_get_ip }, { .type = NDA_LLADDR , .off = _OUT(nda_lladdr), .cb = snl_attr_dup_nla }, { .type = NDA_PROBES, .off = _OUT(nda_probes), .cb = snl_attr_get_uint32 }, { .type = NDA_IFINDEX, .off = _OUT(nda_ifindex), .cb = snl_attr_get_uint32 }, { .type = NDA_FREEBSD, .arg = &_neigh_fbsd_parser, .cb = snl_attr_get_nested }, }; static struct snl_field_parser _fp_p_neigh_s[] = { {.off_in = _IN(ndm_family), .off_out = _OUT(ndm_family), .cb = snl_field_get_uint8 }, {.off_in = _IN(ndm_flags), .off_out = _OUT(ndm_flags), .cb = snl_field_get_uint8 }, {.off_in = _IN(ndm_state), .off_out = _OUT(ndm_state), .cb = snl_field_get_uint16 }, {.off_in = _IN(ndm_ifindex), .off_out = _OUT(nda_ifindex), .cb = snl_field_get_uint32 }, }; static inline bool _cb_p_neigh(struct snl_state *ss __unused, void *_target) { struct snl_parsed_neigh *target = _target; finalize_sockaddr(target->nda_dst, target->nda_ifindex); return (true); } #undef _IN #undef _OUT -SNL_DECLARE_PARSER_EXT(snl_rtm_neigh_parser, struct ndmsg, _fp_p_neigh_s, _nla_p_neigh_s, _cb_p_neigh); +SNL_DECLARE_PARSER_EXT(snl_rtm_neigh_parser, sizeof(struct ndmsg), + sizeof(struct snl_parsed_neigh), _fp_p_neigh_s, _nla_p_neigh_s, + _cb_p_neigh); struct snl_parsed_addr { uint8_t ifa_family; uint8_t ifa_prefixlen; uint32_t ifa_index; struct sockaddr *ifa_local; struct sockaddr *ifa_address; struct sockaddr *ifa_broadcast; char *ifa_label; struct ifa_cacheinfo *ifa_cacheinfo; uint32_t ifaf_vhid; uint32_t ifaf_flags; }; #define _IN(_field) offsetof(struct ifaddrmsg, _field) #define _OUT(_field) offsetof(struct snl_parsed_addr, _field) static const struct snl_attr_parser _nla_p_addr_fbsd[] = { { .type = IFAF_VHID, .off = _OUT(ifaf_vhid), .cb = snl_attr_get_uint32 }, { .type = IFAF_FLAGS, .off = _OUT(ifaf_flags), .cb = snl_attr_get_uint32 }, }; SNL_DECLARE_ATTR_PARSER(_addr_fbsd_parser, _nla_p_addr_fbsd); static const struct snl_attr_parser _nla_p_addr_s[] = { { .type = IFA_ADDRESS, .off = _OUT(ifa_address), .cb = snl_attr_get_ip }, { .type = IFA_LOCAL, .off = _OUT(ifa_local), .cb = snl_attr_get_ip }, { .type = IFA_LABEL, .off = _OUT(ifa_label), .cb = snl_attr_dup_string }, { .type = IFA_BROADCAST, .off = _OUT(ifa_broadcast), .cb = snl_attr_get_ip }, { .type = IFA_CACHEINFO, .off = _OUT(ifa_cacheinfo), .cb = snl_attr_dup_struct }, { .type = IFA_FREEBSD, .arg = &_addr_fbsd_parser, .cb = snl_attr_get_nested }, }; static const struct snl_field_parser _fp_p_addr_s[] = { {.off_in = _IN(ifa_family), .off_out = _OUT(ifa_family), .cb = snl_field_get_uint8 }, {.off_in = _IN(ifa_prefixlen), .off_out = _OUT(ifa_prefixlen), .cb = snl_field_get_uint8 }, {.off_in = _IN(ifa_index), .off_out = _OUT(ifa_index), .cb = snl_field_get_uint32 }, }; static inline bool _cb_p_addr(struct snl_state *ss __unused, void *_target) { struct snl_parsed_addr *target = _target; finalize_sockaddr(target->ifa_address, target->ifa_index); finalize_sockaddr(target->ifa_local, target->ifa_index); return (true); } #undef _IN #undef _OUT -SNL_DECLARE_PARSER_EXT(snl_rtm_addr_parser, struct ifaddrmsg, _fp_p_addr_s, _nla_p_addr_s, _cb_p_addr); +SNL_DECLARE_PARSER_EXT(snl_rtm_addr_parser, sizeof(struct ifaddrmsg), + sizeof(struct snl_parsed_addr), _fp_p_addr_s, _nla_p_addr_s, + _cb_p_addr); struct snl_parsed_nhop { uint32_t nha_id; uint8_t nha_blackhole; uint8_t nha_groups; uint8_t nhaf_knhops; uint8_t nhaf_family; uint32_t nha_oif; struct sockaddr *nha_gw; uint8_t nh_family; uint8_t nh_protocol; uint32_t nhaf_table; uint32_t nhaf_kid; uint32_t nhaf_aif; }; #define _IN(_field) offsetof(struct nhmsg, _field) #define _OUT(_field) offsetof(struct snl_parsed_nhop, _field) static struct snl_attr_parser _nla_p_nh_fbsd[] = { { .type = NHAF_KNHOPS, .off = _OUT(nhaf_knhops), .cb = snl_attr_get_flag }, { .type = NHAF_TABLE, .off = _OUT(nhaf_table), .cb = snl_attr_get_uint32 }, { .type = NHAF_KID, .off = _OUT(nhaf_kid), .cb = snl_attr_get_uint32 }, { .type = NHAF_AIF, .off = _OUT(nhaf_aif), .cb = snl_attr_get_uint32 }, }; SNL_DECLARE_ATTR_PARSER(_nh_fbsd_parser, _nla_p_nh_fbsd); static const struct snl_field_parser _fp_p_nh[] = { { .off_in = _IN(nh_family), .off_out = _OUT(nh_family), .cb = snl_field_get_uint8 }, { .off_in = _IN(nh_protocol), .off_out = _OUT(nh_protocol), .cb = snl_field_get_uint8 }, }; static const struct snl_attr_parser _nla_p_nh[] = { { .type = NHA_ID, .off = _OUT(nha_id), .cb = snl_attr_get_uint32 }, { .type = NHA_BLACKHOLE, .off = _OUT(nha_blackhole), .cb = snl_attr_get_flag }, { .type = NHA_OIF, .off = _OUT(nha_oif), .cb = snl_attr_get_uint32 }, { .type = NHA_GATEWAY, .off = _OUT(nha_gw), .cb = snl_attr_get_ip }, { .type = NHA_FREEBSD, .arg = &_nh_fbsd_parser, .cb = snl_attr_get_nested }, }; static inline bool _cb_p_nh(struct snl_state *ss __unused, void *_target) { struct snl_parsed_nhop *target = _target; finalize_sockaddr(target->nha_gw, target->nha_oif); return (true); } #undef _IN #undef _OUT -SNL_DECLARE_PARSER_EXT(snl_nhmsg_parser, struct nhmsg, _fp_p_nh, _nla_p_nh, _cb_p_nh); +SNL_DECLARE_PARSER_EXT(snl_nhmsg_parser, sizeof(struct nhmsg), + sizeof(struct snl_parsed_nhop), _fp_p_nh, _nla_p_nh, _cb_p_nh); static const struct snl_hdr_parser *snl_all_route_parsers[] = { &_metrics_mp_nh_parser, &_mpath_nh_parser, &_metrics_parser, &snl_rtm_route_parser, &_link_fbsd_parser, &snl_rtm_link_parser, &snl_rtm_link_parser_simple, &_neigh_fbsd_parser, &snl_rtm_neigh_parser, &_addr_fbsd_parser, &snl_rtm_addr_parser, &_nh_fbsd_parser, &snl_nhmsg_parser, }; #endif