diff options
Diffstat (limited to 'contrib/wpa/src/drivers/netlink.c')
| -rw-r--r-- | contrib/wpa/src/drivers/netlink.c | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/contrib/wpa/src/drivers/netlink.c b/contrib/wpa/src/drivers/netlink.c deleted file mode 100644 index ad15b1d..0000000 --- a/contrib/wpa/src/drivers/netlink.c +++ /dev/null @@ -1,204 +0,0 @@ -/* - * Netlink helper functions for driver wrappers - * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Alternatively, this software may be distributed under the terms of BSD - * license. - * - * See README and COPYING for more details. - */ - -#include "includes.h" - -#include "common.h" -#include "eloop.h" -#include "priv_netlink.h" -#include "netlink.h" - - -struct netlink_data { - struct netlink_config *cfg; - int sock; -}; - - -static void netlink_receive_link(struct netlink_data *netlink, - void (*cb)(void *ctx, struct ifinfomsg *ifi, - u8 *buf, size_t len), - struct nlmsghdr *h) -{ - if (cb == NULL || NLMSG_PAYLOAD(h, 0) < sizeof(struct ifinfomsg)) - return; - cb(netlink->cfg->ctx, NLMSG_DATA(h), - NLMSG_DATA(h) + NLMSG_ALIGN(sizeof(struct ifinfomsg)), - NLMSG_PAYLOAD(h, sizeof(struct ifinfomsg))); -} - - -static void netlink_receive(int sock, void *eloop_ctx, void *sock_ctx) -{ - struct netlink_data *netlink = eloop_ctx; - char buf[8192]; - int left; - struct sockaddr_nl from; - socklen_t fromlen; - struct nlmsghdr *h; - int max_events = 10; - -try_again: - fromlen = sizeof(from); - left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT, - (struct sockaddr *) &from, &fromlen); - if (left < 0) { - if (errno != EINTR && errno != EAGAIN) - wpa_printf(MSG_INFO, "netlink: recvfrom failed: %s", - strerror(errno)); - return; - } - - h = (struct nlmsghdr *) buf; - while (NLMSG_OK(h, left)) { - switch (h->nlmsg_type) { - case RTM_NEWLINK: - netlink_receive_link(netlink, netlink->cfg->newlink_cb, - h); - break; - case RTM_DELLINK: - netlink_receive_link(netlink, netlink->cfg->dellink_cb, - h); - break; - } - - h = NLMSG_NEXT(h, left); - } - - if (left > 0) { - wpa_printf(MSG_DEBUG, "netlink: %d extra bytes in the end of " - "netlink message", left); - } - - if (--max_events > 0) { - /* - * Try to receive all events in one eloop call in order to - * limit race condition on cases where AssocInfo event, Assoc - * event, and EAPOL frames are received more or less at the - * same time. We want to process the event messages first - * before starting EAPOL processing. - */ - goto try_again; - } -} - - -struct netlink_data * netlink_init(struct netlink_config *cfg) -{ - struct netlink_data *netlink; - struct sockaddr_nl local; - - netlink = os_zalloc(sizeof(*netlink)); - if (netlink == NULL) - return NULL; - - netlink->cfg = cfg; - - netlink->sock = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE); - if (netlink->sock < 0) { - wpa_printf(MSG_ERROR, "netlink: Failed to open netlink " - "socket: %s", strerror(errno)); - netlink_deinit(netlink); - return NULL; - } - - os_memset(&local, 0, sizeof(local)); - local.nl_family = AF_NETLINK; - local.nl_groups = RTMGRP_LINK; - if (bind(netlink->sock, (struct sockaddr *) &local, sizeof(local)) < 0) - { - wpa_printf(MSG_ERROR, "netlink: Failed to bind netlink " - "socket: %s", strerror(errno)); - netlink_deinit(netlink); - return NULL; - } - - eloop_register_read_sock(netlink->sock, netlink_receive, netlink, - NULL); - - return netlink; -} - - -void netlink_deinit(struct netlink_data *netlink) -{ - if (netlink == NULL) - return; - if (netlink->sock >= 0) { - eloop_unregister_read_sock(netlink->sock); - close(netlink->sock); - } - os_free(netlink->cfg); - os_free(netlink); -} - -int netlink_send_oper_ifla(struct netlink_data *netlink, int ifindex, - int linkmode, int operstate) -{ - struct { - struct nlmsghdr hdr; - struct ifinfomsg ifinfo; - char opts[16]; - } req; - struct rtattr *rta; - static int nl_seq; - ssize_t ret; - - os_memset(&req, 0, sizeof(req)); - - req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); - req.hdr.nlmsg_type = RTM_SETLINK; - req.hdr.nlmsg_flags = NLM_F_REQUEST; - req.hdr.nlmsg_seq = ++nl_seq; - req.hdr.nlmsg_pid = 0; - - req.ifinfo.ifi_family = AF_UNSPEC; - req.ifinfo.ifi_type = 0; - req.ifinfo.ifi_index = ifindex; - req.ifinfo.ifi_flags = 0; - req.ifinfo.ifi_change = 0; - - if (linkmode != -1) { - rta = aliasing_hide_typecast( - ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)), - struct rtattr); - rta->rta_type = IFLA_LINKMODE; - rta->rta_len = RTA_LENGTH(sizeof(char)); - *((char *) RTA_DATA(rta)) = linkmode; - req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) + - RTA_LENGTH(sizeof(char)); - } - if (operstate != -1) { - rta = aliasing_hide_typecast( - ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)), - struct rtattr); - rta->rta_type = IFLA_OPERSTATE; - rta->rta_len = RTA_LENGTH(sizeof(char)); - *((char *) RTA_DATA(rta)) = operstate; - req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) + - RTA_LENGTH(sizeof(char)); - } - - wpa_printf(MSG_DEBUG, "netlink: Operstate: linkmode=%d, operstate=%d", - linkmode, operstate); - - ret = send(netlink->sock, &req, req.hdr.nlmsg_len, 0); - if (ret < 0) { - wpa_printf(MSG_DEBUG, "netlink: Sending operstate IFLA " - "failed: %s (assume operstate is not supported)", - strerror(errno)); - } - - return ret < 0 ? -1 : 0; -} |
