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Diffstat (limited to 'package/libnl-tiny/src/include/netlink/msg.h')
-rw-r--r-- | package/libnl-tiny/src/include/netlink/msg.h | 308 |
1 files changed, 0 insertions, 308 deletions
diff --git a/package/libnl-tiny/src/include/netlink/msg.h b/package/libnl-tiny/src/include/netlink/msg.h deleted file mode 100644 index b3e2b0b2b9..0000000000 --- a/package/libnl-tiny/src/include/netlink/msg.h +++ /dev/null @@ -1,308 +0,0 @@ -/* - * netlink/msg.c Netlink Messages Interface - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation version 2.1 - * of the License. - * - * Copyright (c) 2003-2006 Thomas Graf <tgraf@suug.ch> - */ - -#ifndef NETLINK_MSG_H_ -#define NETLINK_MSG_H_ - -#include <netlink/netlink.h> -#include <netlink/object.h> - -#ifdef __cplusplus -extern "C" { -#endif - -struct nla_policy; - -#define NL_DONTPAD 0 - -/** - * @ingroup msg - * @brief - * Will cause the netlink pid to be set to the pid assigned to - * the netlink handle (socket) just before sending the message off. - * @note Requires the use of nl_send_auto_complete()! - */ -#define NL_AUTO_PID 0 - -/** - * @ingroup msg - * @brief - * May be used to refer to a sequence number which should be - * automatically set just before sending the message off. - * @note Requires the use of nl_send_auto_complete()! - */ -#define NL_AUTO_SEQ 0 - -#define NL_MSG_CRED_PRESENT 1 - -struct nl_msg -{ - int nm_protocol; - int nm_flags; - struct sockaddr_nl nm_src; - struct sockaddr_nl nm_dst; - struct ucred nm_creds; - struct nlmsghdr * nm_nlh; - size_t nm_size; - int nm_refcnt; -}; - - -struct nl_msg; -struct nl_tree; -struct ucred; - -/* message parsing */ -extern int nlmsg_ok(const struct nlmsghdr *, int); -extern struct nlmsghdr * nlmsg_next(struct nlmsghdr *, int *); -extern int nlmsg_parse(struct nlmsghdr *, int, struct nlattr **, - int, struct nla_policy *); -extern int nlmsg_validate(struct nlmsghdr *, int, int, - struct nla_policy *); - -extern struct nl_msg * nlmsg_alloc(void); -extern struct nl_msg * nlmsg_alloc_size(size_t); -extern struct nl_msg * nlmsg_alloc_simple(int, int); -extern void nlmsg_set_default_size(size_t); -extern struct nl_msg * nlmsg_inherit(struct nlmsghdr *); -extern struct nl_msg * nlmsg_convert(struct nlmsghdr *); -extern void * nlmsg_reserve(struct nl_msg *, size_t, int); -extern int nlmsg_append(struct nl_msg *, void *, size_t, int); - -extern struct nlmsghdr * nlmsg_put(struct nl_msg *, uint32_t, uint32_t, - int, int, int); -extern void nlmsg_free(struct nl_msg *); - -extern int nl_msg_parse(struct nl_msg *, - void (*cb)(struct nl_object *, void *), - void *); - -extern void nl_msg_dump(struct nl_msg *, FILE *); - -/** - * length of netlink message not including padding - * @arg payload length of message payload - */ -static inline int nlmsg_msg_size(int payload) -{ - return NLMSG_HDRLEN + payload; -} - -/** - * length of netlink message including padding - * @arg payload length of message payload - */ -static inline int nlmsg_total_size(int payload) -{ - return NLMSG_ALIGN(nlmsg_msg_size(payload)); -} - -/** - * length of padding at the message's tail - * @arg payload length of message payload - */ -static inline int nlmsg_padlen(int payload) -{ - return nlmsg_total_size(payload) - nlmsg_msg_size(payload); -} - -/** - * head of message payload - * @arg nlh netlink messsage header - */ -static inline void *nlmsg_data(const struct nlmsghdr *nlh) -{ - return (unsigned char *) nlh + NLMSG_HDRLEN; -} - -static inline void *nlmsg_tail(const struct nlmsghdr *nlh) -{ - return (unsigned char *) nlh + NLMSG_ALIGN(nlh->nlmsg_len); -} - -/** - * length of message payload - * @arg nlh netlink message header - */ -static inline int nlmsg_len(const struct nlmsghdr *nlh) -{ - return nlh->nlmsg_len - NLMSG_HDRLEN; -} - -/** - * head of attributes data - * @arg nlh netlink message header - * @arg hdrlen length of family specific header - */ -static inline struct nlattr *nlmsg_attrdata(const struct nlmsghdr *nlh, int hdrlen) -{ - unsigned char *data = (unsigned char*)nlmsg_data(nlh); - return (struct nlattr *) (data + NLMSG_ALIGN(hdrlen)); -} - -/** - * length of attributes data - * @arg nlh netlink message header - * @arg hdrlen length of family specific header - */ -static inline int nlmsg_attrlen(const struct nlmsghdr *nlh, int hdrlen) -{ - return nlmsg_len(nlh) - NLMSG_ALIGN(hdrlen); -} - -static inline int nlmsg_valid_hdr(const struct nlmsghdr *nlh, int hdrlen) -{ - if (nlh->nlmsg_len < (uint)nlmsg_msg_size(hdrlen)) - return 0; - - return 1; -} - - -static inline void nlmsg_set_proto(struct nl_msg *msg, int protocol) -{ - msg->nm_protocol = protocol; -} - -static inline int nlmsg_get_proto(struct nl_msg *msg) -{ - return msg->nm_protocol; -} - -static inline size_t nlmsg_get_max_size(struct nl_msg *msg) -{ - return msg->nm_size; -} - -static inline void nlmsg_set_src(struct nl_msg *msg, struct sockaddr_nl *addr) -{ - memcpy(&msg->nm_src, addr, sizeof(*addr)); -} - -static inline struct sockaddr_nl *nlmsg_get_src(struct nl_msg *msg) -{ - return &msg->nm_src; -} - -static inline void nlmsg_set_dst(struct nl_msg *msg, struct sockaddr_nl *addr) -{ - memcpy(&msg->nm_dst, addr, sizeof(*addr)); -} - -static inline struct sockaddr_nl *nlmsg_get_dst(struct nl_msg *msg) -{ - return &msg->nm_dst; -} - -static inline void nlmsg_set_creds(struct nl_msg *msg, struct ucred *creds) -{ - memcpy(&msg->nm_creds, creds, sizeof(*creds)); - msg->nm_flags |= NL_MSG_CRED_PRESENT; -} - -static inline struct ucred *nlmsg_get_creds(struct nl_msg *msg) -{ - if (msg->nm_flags & NL_MSG_CRED_PRESENT) - return &msg->nm_creds; - return NULL; -} - -/** - * Return actual netlink message - * @arg n netlink message - * - * Returns the actual netlink message casted to the type of the netlink - * message header. - * - * @return A pointer to the netlink message. - */ -static inline struct nlmsghdr *nlmsg_hdr(struct nl_msg *n) -{ - return n->nm_nlh; -} - -/** - * Acquire a reference on a netlink message - * @arg msg message to acquire reference from - */ -static inline void nlmsg_get(struct nl_msg *msg) -{ - msg->nm_refcnt++; -} - -/** - * Expand maximum payload size of a netlink message - * @arg n Netlink message. - * @arg newlen New maximum payload size. - * - * Reallocates the payload section of a netlink message and increases - * the maximum payload size of the message. - * - * @note Any pointers pointing to old payload block will be stale and - * need to be refetched. Therfore, do not expand while constructing - * nested attributes or while reserved data blocks are held. - * - * @return 0 on success or a negative error code. - */ -static inline int nlmsg_expand(struct nl_msg *n, size_t newlen) -{ - void *tmp; - - if (newlen <= n->nm_size) - return -NLE_INVAL; - - tmp = realloc(n->nm_nlh, newlen); - if (tmp == NULL) - return -NLE_NOMEM; - - n->nm_nlh = (struct nlmsghdr*)tmp; - n->nm_size = newlen; - - return 0; -} - - -/** - * @name Iterators - * @{ - */ - -/** - * @ingroup msg - * Iterate over a stream of attributes in a message - * @arg pos loop counter, set to current attribute - * @arg nlh netlink message header - * @arg hdrlen length of family header - * @arg rem initialized to len, holds bytes currently remaining in stream - */ -#define nlmsg_for_each_attr(pos, nlh, hdrlen, rem) \ - nla_for_each_attr(pos, nlmsg_attrdata(nlh, hdrlen), \ - nlmsg_attrlen(nlh, hdrlen), rem) - -/** - * Iterate over a stream of messages - * @arg pos loop counter, set to current message - * @arg head head of message stream - * @arg len length of message stream - * @arg rem initialized to len, holds bytes currently remaining in stream - */ -#define nlmsg_for_each_msg(pos, head, len, rem) \ - for (pos = head, rem = len; \ - nlmsg_ok(pos, rem); \ - pos = nlmsg_next(pos, &(rem))) - -/** @} */ - -#ifdef __cplusplus -} -#endif - -#endif |