diff options
Diffstat (limited to 'sys/netlink/netlink_message_parser.h')
| -rw-r--r-- | sys/netlink/netlink_message_parser.h | 77 |
1 files changed, 43 insertions, 34 deletions
diff --git a/sys/netlink/netlink_message_parser.h b/sys/netlink/netlink_message_parser.h index 42a59f45b22a..13d52d80ecdc 100644 --- a/sys/netlink/netlink_message_parser.h +++ b/sys/netlink/netlink_message_parser.h @@ -64,15 +64,15 @@ lb_clear(struct linear_buffer *lb) #define NL_MAX_ERROR_BUF 128 #define SCRATCH_BUFFER_SIZE (1024 + NL_MAX_ERROR_BUF) struct nl_pstate { - struct linear_buffer lb; /* Per-message scratch buffer */ - struct nlpcb *nlp; /* Originator socket */ - struct nl_writer *nw; /* Message writer to use */ - struct nlmsghdr *hdr; /* Current parsed message header */ - uint32_t err_off; /* error offset from hdr start */ - int error; /* last operation error */ - char *err_msg; /* Description of last error */ - struct nlattr *cookie; /* NLA to return to the userspace */ - bool strict; /* Strict parsing required */ + struct linear_buffer lb; /* Per-message scratch buffer */ + struct nlpcb *nlp; /* Originator socket */ + struct nl_writer *nw; /* Message writer to use */ + struct nlmsghdr *hdr; /* Current parsed message header */ + uint32_t err_off; /* error offset from hdr start */ + int error; /* last operation error */ + char *err_msg; /* Description of last error */ + struct nlattr *cookie; /* NLA to return to the userspace */ + bool strict; /* Strict parsing required */ }; static inline void * @@ -80,10 +80,10 @@ npt_alloc(struct nl_pstate *npt, int len) { return (lb_alloc(&npt->lb, len)); } -#define npt_alloc_sockaddr(_npt, _len) ((struct sockaddr *)(npt_alloc(_npt, _len))) +#define npt_alloc_sockaddr(_npt, _len) \ + ((struct sockaddr *)(npt_alloc((_npt), (_len)))) -typedef int parse_field_f(void *hdr, struct nl_pstate *npt, - void *target); +typedef int parse_field_f(void *hdr, struct nl_pstate *npt, void *target); struct nlfield_parser { uint16_t off_in; uint16_t off_out; @@ -98,29 +98,28 @@ int nlf_get_u16(void *src, struct nl_pstate *npt, void *target); int nlf_get_u32(void *src, struct nl_pstate *npt, void *target); int nlf_get_u8_u32(void *src, struct nl_pstate *npt, void *target); - struct nlattr_parser; typedef int parse_attr_f(struct nlattr *attr, struct nl_pstate *npt, const void *arg, void *target); struct nlattr_parser { - uint16_t type; /* Attribute type */ - uint16_t off; /* field offset in the target structure */ - parse_attr_f *cb; /* parser function to call */ - const void *arg; + uint16_t type; /* Attribute type */ + uint16_t off; /* field offset in the target structure */ + parse_attr_f *cb; /* parser function to call */ + const void *arg; }; typedef bool strict_parser_f(void *hdr, struct nl_pstate *npt); typedef bool post_parser_f(void *parsed_attrs, struct nl_pstate *npt); struct nlhdr_parser { - int nl_hdr_off; /* aligned netlink header size */ - int out_hdr_off; /* target header size */ - int fp_size; - int np_size; + int nl_hdr_off; /* aligned netlink header size */ + int out_hdr_off; /* target header size */ + int fp_size; + int np_size; const struct nlfield_parser *fp; /* array of header field parsers */ const struct nlattr_parser *np; /* array of attribute parsers */ - strict_parser_f *sp; /* Pre-parse strict validation function */ - post_parser_f *post_parse; + strict_parser_f *sp; /* Pre-parse strict validation function */ + post_parser_f *post_parse; }; #define NL_DECLARE_PARSER_EXT(_name, _t, _sp, _fp, _np, _pp) \ @@ -163,11 +162,13 @@ static const struct nlhdr_parser _name = { \ #define NL_ATTR_BMASK_SIZE 128 BITSET_DEFINE(nlattr_bmask, NL_ATTR_BMASK_SIZE); -void nl_get_attrs_bmask_raw(struct nlattr *nla_head, int len, struct nlattr_bmask *bm); +void nl_get_attrs_bmask_raw(struct nlattr *nla_head, int len, + struct nlattr_bmask *bm); bool nl_has_attr(const struct nlattr_bmask *bm, unsigned int nla_type); -int nl_parse_attrs_raw(struct nlattr *nla_head, int len, const struct nlattr_parser *ps, - int pslen, struct nl_pstate *npt, void *target); +int nl_parse_attrs_raw(struct nlattr *nla_head, int len, + const struct nlattr_parser *ps, int pslen, struct nl_pstate *npt, + void *target); int nlattr_get_flag(struct nlattr *nla, struct nl_pstate *npt, const void *arg, void *target); @@ -228,17 +229,24 @@ static inline int nl_parse_header(void *hdr, int len, const struct nlhdr_parser *parser, struct nl_pstate *npt, void *target) { + struct nlattr *nla; int error; if (__predict_false(len < parser->nl_hdr_off)) { + void *tmp_hdr; + if (npt->strict) { - nlmsg_report_err_msg(npt, "header too short: expected %d, got %d", + nlmsg_report_err_msg(npt, + "header too short: expected %d, got %d", parser->nl_hdr_off, len); return (EINVAL); } - /* Compat with older applications: pretend there's a full header */ - void *tmp_hdr = npt_alloc(npt, parser->nl_hdr_off); + /* + * Compatibility with older applications: + * pretend there's a full header. + */ + tmp_hdr = npt_alloc(npt, parser->nl_hdr_off); if (tmp_hdr == NULL) return (EINVAL); memcpy(tmp_hdr, hdr, len); @@ -260,8 +268,8 @@ nl_parse_header(void *hdr, int len, const struct nlhdr_parser *parser, return (error); } - struct nlattr *nla_head = (struct nlattr *)((char *)hdr + parser->nl_hdr_off); - error = nl_parse_attrs_raw(nla_head, len - parser->nl_hdr_off, parser->np, + nla = (struct nlattr *)((char *)hdr + parser->nl_hdr_off); + error = nl_parse_attrs_raw(nla, len - parser->nl_hdr_off, parser->np, parser->np_size, npt, target); if (parser->post_parse != NULL && error == 0) { @@ -314,12 +322,13 @@ static inline int nl_parse_nlmsg(struct nlmsghdr *hdr, const struct nlhdr_parser *parser, struct nl_pstate *npt, void *target) { - return (nl_parse_header(hdr + 1, hdr->nlmsg_len - sizeof(*hdr), parser, npt, target)); + return (nl_parse_header(hdr + 1, hdr->nlmsg_len - sizeof(*hdr), parser, + npt, target)); } static inline void -nl_get_attrs_bmask_nlmsg(struct nlmsghdr *hdr, const struct nlhdr_parser *parser, - struct nlattr_bmask *bm) +nl_get_attrs_bmask_nlmsg(struct nlmsghdr *hdr, + const struct nlhdr_parser *parser, struct nlattr_bmask *bm) { struct nlattr *nla_head; |