diff options
author | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-10-08 11:24:12 +0000 |
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committer | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-10-08 11:24:12 +0000 |
commit | 228d1c4df21088ffb0f2e087eae8c4323ad05760 (patch) | |
tree | 5155ea7bc428f0af268c4c63435d0696d18b124d /package/libnl-tiny/src/genl.c | |
parent | e260ab73e0a396b3ba39824beb1fb71716828a7f (diff) |
move library packages to package/libs/
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33657 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package/libnl-tiny/src/genl.c')
-rw-r--r-- | package/libnl-tiny/src/genl.c | 268 |
1 files changed, 0 insertions, 268 deletions
diff --git a/package/libnl-tiny/src/genl.c b/package/libnl-tiny/src/genl.c deleted file mode 100644 index 055be919e..000000000 --- a/package/libnl-tiny/src/genl.c +++ /dev/null @@ -1,268 +0,0 @@ -/* - * lib/genl/genl.c Generic Netlink - * - * 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) 2003-2008 Thomas Graf <tgraf@suug.ch> - */ - -/** - * @defgroup genl Generic Netlink - * - * @par Message Format - * @code - * <------- NLMSG_ALIGN(hlen) ------> <---- NLMSG_ALIGN(len) ---> - * +----------------------------+- - -+- - - - - - - - - - -+- - -+ - * | Header | Pad | Payload | Pad | - * | struct nlmsghdr | | | | - * +----------------------------+- - -+- - - - - - - - - - -+- - -+ - * @endcode - * @code - * <-------- GENL_HDRLEN -------> <--- hdrlen --> - * <------- genlmsg_len(ghdr) ------> - * +------------------------+- - -+---------------+- - -+------------+ - * | Generic Netlink Header | Pad | Family Header | Pad | Attributes | - * | struct genlmsghdr | | | | | - * +------------------------+- - -+---------------+- - -+------------+ - * genlmsg_data(ghdr)--------------^ ^ - * genlmsg_attrdata(ghdr, hdrlen)------------------------- - * @endcode - * - * @par Example - * @code - * #include <netlink/netlink.h> - * #include <netlink/genl/genl.h> - * #include <netlink/genl/ctrl.h> - * - * struct nl_sock *sock; - * struct nl_msg *msg; - * int family; - * - * // Allocate a new netlink socket - * sock = nl_socket_alloc(); - * - * // Connect to generic netlink socket on kernel side - * genl_connect(sock); - * - * // Ask kernel to resolve family name to family id - * family = genl_ctrl_resolve(sock, "generic_netlink_family_name"); - * - * // Construct a generic netlink by allocating a new message, fill in - * // the header and append a simple integer attribute. - * msg = nlmsg_alloc(); - * genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, family, 0, NLM_F_ECHO, - * CMD_FOO_GET, FOO_VERSION); - * nla_put_u32(msg, ATTR_FOO, 123); - * - * // Send message over netlink socket - * nl_send_auto_complete(sock, msg); - * - * // Free message - * nlmsg_free(msg); - * - * // Prepare socket to receive the answer by specifying the callback - * // function to be called for valid messages. - * nl_socket_modify_cb(sock, NL_CB_VALID, NL_CB_CUSTOM, parse_cb, NULL); - * - * // Wait for the answer and receive it - * nl_recvmsgs_default(sock); - * - * static int parse_cb(struct nl_msg *msg, void *arg) - * { - * struct nlmsghdr *nlh = nlmsg_hdr(msg); - * struct nlattr *attrs[ATTR_MAX+1]; - * - * // Validate message and parse attributes - * genlmsg_parse(nlh, 0, attrs, ATTR_MAX, policy); - * - * if (attrs[ATTR_FOO]) { - * uint32_t value = nla_get_u32(attrs[ATTR_FOO]); - * ... - * } - * - * return 0; - * } - * @endcode - * @{ - */ - -#include <netlink-generic.h> -#include <netlink/netlink.h> -#include <netlink/genl/genl.h> -#include <netlink/utils.h> - -/** - * @name Socket Creating - * @{ - */ - -int genl_connect(struct nl_sock *sk) -{ - return nl_connect(sk, NETLINK_GENERIC); -} - -/** @} */ - -/** - * @name Sending - * @{ - */ - -/** - * Send trivial generic netlink message - * @arg sk Netlink socket. - * @arg family Generic netlink family - * @arg cmd Command - * @arg version Version - * @arg flags Additional netlink message flags. - * - * Fills out a routing netlink request message and sends it out - * using nl_send_simple(). - * - * @return 0 on success or a negative error code. - */ -int genl_send_simple(struct nl_sock *sk, int family, int cmd, - int version, int flags) -{ - struct genlmsghdr hdr = { - .cmd = cmd, - .version = version, - }; - - return nl_send_simple(sk, family, flags, &hdr, sizeof(hdr)); -} - -/** @} */ - - -/** - * @name Message Parsing - * @{ - */ - -int genlmsg_valid_hdr(struct nlmsghdr *nlh, int hdrlen) -{ - struct genlmsghdr *ghdr; - - if (!nlmsg_valid_hdr(nlh, GENL_HDRLEN)) - return 0; - - ghdr = nlmsg_data(nlh); - if (genlmsg_len(ghdr) < NLMSG_ALIGN(hdrlen)) - return 0; - - return 1; -} - -int genlmsg_validate(struct nlmsghdr *nlh, int hdrlen, int maxtype, - struct nla_policy *policy) -{ - struct genlmsghdr *ghdr; - - if (!genlmsg_valid_hdr(nlh, hdrlen)) - return -NLE_MSG_TOOSHORT; - - ghdr = nlmsg_data(nlh); - return nla_validate(genlmsg_attrdata(ghdr, hdrlen), - genlmsg_attrlen(ghdr, hdrlen), maxtype, policy); -} - -int genlmsg_parse(struct nlmsghdr *nlh, int hdrlen, struct nlattr *tb[], - int maxtype, struct nla_policy *policy) -{ - struct genlmsghdr *ghdr; - - if (!genlmsg_valid_hdr(nlh, hdrlen)) - return -NLE_MSG_TOOSHORT; - - ghdr = nlmsg_data(nlh); - return nla_parse(tb, maxtype, genlmsg_attrdata(ghdr, hdrlen), - genlmsg_attrlen(ghdr, hdrlen), policy); -} - -/** - * Get head of message payload - * @arg gnlh genetlink messsage header - */ -void *genlmsg_data(const struct genlmsghdr *gnlh) -{ - return ((unsigned char *) gnlh + GENL_HDRLEN); -} - -/** - * Get lenght of message payload - * @arg gnlh genetlink message header - */ -int genlmsg_len(const struct genlmsghdr *gnlh) -{ - struct nlmsghdr *nlh = (struct nlmsghdr *)((unsigned char *)gnlh - - NLMSG_HDRLEN); - return (nlh->nlmsg_len - GENL_HDRLEN - NLMSG_HDRLEN); -} - -/** - * Get head of attribute data - * @arg gnlh generic netlink message header - * @arg hdrlen length of family specific header - */ -struct nlattr *genlmsg_attrdata(const struct genlmsghdr *gnlh, int hdrlen) -{ - return genlmsg_data(gnlh) + NLMSG_ALIGN(hdrlen); -} - -/** - * Get length of attribute data - * @arg gnlh generic netlink message header - * @arg hdrlen length of family specific header - */ -int genlmsg_attrlen(const struct genlmsghdr *gnlh, int hdrlen) -{ - return genlmsg_len(gnlh) - NLMSG_ALIGN(hdrlen); -} - -/** @} */ - -/** - * @name Message Building - * @{ - */ - -/** - * Add generic netlink header to netlink message - * @arg msg netlink message - * @arg pid netlink process id or NL_AUTO_PID - * @arg seq sequence number of message or NL_AUTO_SEQ - * @arg family generic netlink family - * @arg hdrlen length of user specific header - * @arg flags message flags - * @arg cmd generic netlink command - * @arg version protocol version - * - * Returns pointer to user specific header. - */ -void *genlmsg_put(struct nl_msg *msg, uint32_t pid, uint32_t seq, int family, - int hdrlen, int flags, uint8_t cmd, uint8_t version) -{ - struct nlmsghdr *nlh; - struct genlmsghdr hdr = { - .cmd = cmd, - .version = version, - }; - - nlh = nlmsg_put(msg, pid, seq, family, GENL_HDRLEN + hdrlen, flags); - if (nlh == NULL) - return NULL; - - memcpy(nlmsg_data(nlh), &hdr, sizeof(hdr)); - NL_DBG(2, "msg %p: Added generic netlink header cmd=%d version=%d\n", - msg, cmd, version); - - return nlmsg_data(nlh) + GENL_HDRLEN; -} - -/** @} */ - -/** @} */ |