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/*
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* libnetlink.c RTnetlink service routines.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <net/if_arp.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <string.h>
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#include <errno.h>
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#include <time.h>
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#include <sys/uio.h>
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#include <linux/fib_rules.h>
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#include <linux/if_addrlabel.h>
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#include <linux/if_bridge.h>
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#include <linux/nexthop.h>
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#include "libnetlink.h"
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#define __aligned(x) __attribute__((aligned(x)))
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#ifndef SOL_NETLINK
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#define SOL_NETLINK 270
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#endif
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#ifndef MIN
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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#endif
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int rcvbuf = 1024 * 1024;
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#ifdef HAVE_LIBMNL
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#include <libmnl/libmnl.h>
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static const enum mnl_attr_data_type extack_policy[NLMSGERR_ATTR_MAX + 1] = {
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[NLMSGERR_ATTR_MSG] = MNL_TYPE_NUL_STRING,
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[NLMSGERR_ATTR_OFFS] = MNL_TYPE_U32,
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};
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static int err_attr_cb(const struct nlattr *attr, void *data)
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{
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const struct nlattr **tb = data;
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uint16_t type;
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if (mnl_attr_type_valid(attr, NLMSGERR_ATTR_MAX) < 0) {
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fprintf(stderr, "Invalid extack attribute\n");
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return MNL_CB_ERROR;
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}
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type = mnl_attr_get_type(attr);
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if (mnl_attr_validate(attr, extack_policy[type]) < 0) {
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fprintf(stderr, "extack attribute %d failed validation\n",
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type);
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return MNL_CB_ERROR;
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}
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tb[type] = attr;
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return MNL_CB_OK;
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}
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static void print_ext_ack_msg(bool is_err, const char *msg)
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{
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fprintf(stderr, "%s: %s", is_err ? "Error" : "Warning", msg);
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if (msg[strlen(msg) - 1] != '.')
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fprintf(stderr, ".");
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fprintf(stderr, "\n");
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}
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/* dump netlink extended ack error message */
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int nl_dump_ext_ack(const struct nlmsghdr *nlh, nl_ext_ack_fn_t errfn)
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{
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struct nlattr *tb[NLMSGERR_ATTR_MAX + 1] = {};
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const struct nlmsgerr *err = mnl_nlmsg_get_payload(nlh);
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const struct nlmsghdr *err_nlh = NULL;
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unsigned int hlen = sizeof(*err);
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const char *msg = NULL;
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uint32_t off = 0;
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/* no TLVs, nothing to do here */
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if (!(nlh->nlmsg_flags & NLM_F_ACK_TLVS))
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return 0;
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/* if NLM_F_CAPPED is set then the inner err msg was capped */
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if (!(nlh->nlmsg_flags & NLM_F_CAPPED))
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hlen += mnl_nlmsg_get_payload_len(&err->msg);
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if (mnl_attr_parse(nlh, hlen, err_attr_cb, tb) != MNL_CB_OK)
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return 0;
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if (tb[NLMSGERR_ATTR_MSG])
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msg = mnl_attr_get_str(tb[NLMSGERR_ATTR_MSG]);
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if (tb[NLMSGERR_ATTR_OFFS]) {
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off = mnl_attr_get_u32(tb[NLMSGERR_ATTR_OFFS]);
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if (off > nlh->nlmsg_len) {
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fprintf(stderr,
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"Invalid offset for NLMSGERR_ATTR_OFFS\n");
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off = 0;
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} else if (!(nlh->nlmsg_flags & NLM_F_CAPPED))
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err_nlh = &err->msg;
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}
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if (errfn)
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return errfn(msg, off, err_nlh);
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if (msg && *msg != '\0') {
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bool is_err = !!err->error;
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print_ext_ack_msg(is_err, msg);
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return is_err ? 1 : 0;
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}
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return 0;
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}
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int nl_dump_ext_ack_done(const struct nlmsghdr *nlh, int error)
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{
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struct nlattr *tb[NLMSGERR_ATTR_MAX + 1] = {};
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unsigned int hlen = sizeof(int);
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const char *msg = NULL;
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if (mnl_attr_parse(nlh, hlen, err_attr_cb, tb) != MNL_CB_OK)
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return 0;
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if (tb[NLMSGERR_ATTR_MSG])
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msg = mnl_attr_get_str(tb[NLMSGERR_ATTR_MSG]);
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if (msg && *msg != '\0') {
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bool is_err = !!error;
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print_ext_ack_msg(is_err, msg);
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return is_err ? 1 : 0;
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}
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return 0;
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}
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#else
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#warning "libmnl required for error support"
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/* No extended error ack without libmnl */
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int nl_dump_ext_ack(const struct nlmsghdr *nlh, nl_ext_ack_fn_t errfn)
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{
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return 0;
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}
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int nl_dump_ext_ack_done(const struct nlmsghdr *nlh, int error)
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{
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return 0;
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}
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#endif
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/* Older kernels may not support strict dump and filtering */
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void rtnl_set_strict_dump(struct rtnl_handle *rth)
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{
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int one = 1;
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d3f73b |
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if (setsockopt(rth->fd, SOL_NETLINK, NETLINK_GET_STRICT_CHK,
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&one, sizeof(one)) < 0)
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return;
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d3f73b |
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rth->flags |= RTNL_HANDLE_F_STRICT_CHK;
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}
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int rtnl_add_nl_group(struct rtnl_handle *rth, unsigned int group)
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{
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return setsockopt(rth->fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP,
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&group, sizeof(group));
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}
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void rtnl_close(struct rtnl_handle *rth)
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{
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if (rth->fd >= 0) {
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close(rth->fd);
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rth->fd = -1;
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}
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}
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int rtnl_open_byproto(struct rtnl_handle *rth, unsigned int subscriptions,
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int protocol)
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{
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socklen_t addr_len;
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d3f73b |
int sndbuf = 32768;
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int one = 1;
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memset(rth, 0, sizeof(*rth));
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rth->proto = protocol;
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rth->fd = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, protocol);
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if (rth->fd < 0) {
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d3f73b |
perror("Cannot open netlink socket");
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return -1;
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}
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if (setsockopt(rth->fd, SOL_SOCKET, SO_SNDBUF,
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d3f73b |
&sndbuf, sizeof(sndbuf)) < 0) {
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d3f73b |
perror("SO_SNDBUF");
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return -1;
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d3f73b |
}
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if (setsockopt(rth->fd, SOL_SOCKET, SO_RCVBUF,
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d3f73b |
&rcvbuf, sizeof(rcvbuf)) < 0) {
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d3f73b |
perror("SO_RCVBUF");
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return -1;
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d3f73b |
}
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/* Older kernels may no support extended ACK reporting */
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setsockopt(rth->fd, SOL_NETLINK, NETLINK_EXT_ACK,
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&one, sizeof(one));
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d3f73b |
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memset(&rth->local, 0, sizeof(rth->local));
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rth->local.nl_family = AF_NETLINK;
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rth->local.nl_groups = subscriptions;
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d3f73b |
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d3f73b |
if (bind(rth->fd, (struct sockaddr *)&rth->local,
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d3f73b |
sizeof(rth->local)) < 0) {
|
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d3f73b |
perror("Cannot bind netlink socket");
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|
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d3f73b |
return -1;
|
|
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d3f73b |
}
|
|
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addr_len = sizeof(rth->local);
|
|
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d3f73b |
if (getsockname(rth->fd, (struct sockaddr *)&rth->local,
|
|
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d3f73b |
&addr_len) < 0) {
|
|
Packit |
d3f73b |
perror("Cannot getsockname");
|
|
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d3f73b |
return -1;
|
|
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d3f73b |
}
|
|
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d3f73b |
if (addr_len != sizeof(rth->local)) {
|
|
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d3f73b |
fprintf(stderr, "Wrong address length %d\n", addr_len);
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|
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d3f73b |
return -1;
|
|
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d3f73b |
}
|
|
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d3f73b |
if (rth->local.nl_family != AF_NETLINK) {
|
|
Packit |
d3f73b |
fprintf(stderr, "Wrong address family %d\n",
|
|
Packit |
d3f73b |
rth->local.nl_family);
|
|
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d3f73b |
return -1;
|
|
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d3f73b |
}
|
|
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d3f73b |
rth->seq = time(NULL);
|
|
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d3f73b |
return 0;
|
|
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d3f73b |
}
|
|
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d3f73b |
|
|
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d3f73b |
int rtnl_open(struct rtnl_handle *rth, unsigned int subscriptions)
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|
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d3f73b |
{
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|
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d3f73b |
return rtnl_open_byproto(rth, subscriptions, NETLINK_ROUTE);
|
|
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d3f73b |
}
|
|
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d3f73b |
|
|
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d3f73b |
int rtnl_nexthopdump_req(struct rtnl_handle *rth, int family,
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|
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d3f73b |
req_filter_fn_t filter_fn)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct nhmsg nhm;
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|
Packit |
d3f73b |
char buf[128];
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|
Packit |
d3f73b |
} req = {
|
|
Packit |
d3f73b |
.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)),
|
|
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d3f73b |
.nlh.nlmsg_type = RTM_GETNEXTHOP,
|
|
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d3f73b |
.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
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d3f73b |
.nlh.nlmsg_seq = rth->dump = ++rth->seq,
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|
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d3f73b |
.nhm.nh_family = family,
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|
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d3f73b |
};
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|
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d3f73b |
|
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Packit |
d3f73b |
if (filter_fn) {
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|
Packit |
d3f73b |
int err;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
err = filter_fn(&req.nlh, sizeof(req));
|
|
Packit |
d3f73b |
if (err)
|
|
Packit |
d3f73b |
return err;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, sizeof(req), 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_addrdump_req(struct rtnl_handle *rth, int family,
|
|
Packit |
d3f73b |
req_filter_fn_t filter_fn)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct ifaddrmsg ifm;
|
|
Packit |
d3f73b |
char buf[128];
|
|
Packit |
d3f73b |
} req = {
|
|
Packit |
d3f73b |
.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
|
|
Packit |
d3f73b |
.nlh.nlmsg_type = RTM_GETADDR,
|
|
Packit |
d3f73b |
.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
Packit |
d3f73b |
.nlh.nlmsg_seq = rth->dump = ++rth->seq,
|
|
Packit |
d3f73b |
.ifm.ifa_family = family,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (filter_fn) {
|
|
Packit |
d3f73b |
int err;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
err = filter_fn(&req.nlh, sizeof(req));
|
|
Packit |
d3f73b |
if (err)
|
|
Packit |
d3f73b |
return err;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, sizeof(req), 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_addrlbldump_req(struct rtnl_handle *rth, int family)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct ifaddrlblmsg ifal;
|
|
Packit |
d3f73b |
} req = {
|
|
Packit |
d3f73b |
.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrlblmsg)),
|
|
Packit |
d3f73b |
.nlh.nlmsg_type = RTM_GETADDRLABEL,
|
|
Packit |
d3f73b |
.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
Packit |
d3f73b |
.nlh.nlmsg_seq = rth->dump = ++rth->seq,
|
|
Packit |
d3f73b |
.ifal.ifal_family = family,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, sizeof(req), 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_routedump_req(struct rtnl_handle *rth, int family,
|
|
Packit |
d3f73b |
req_filter_fn_t filter_fn)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct rtmsg rtm;
|
|
Packit |
d3f73b |
char buf[128];
|
|
Packit |
d3f73b |
} req = {
|
|
Packit |
d3f73b |
.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
|
|
Packit |
d3f73b |
.nlh.nlmsg_type = RTM_GETROUTE,
|
|
Packit |
d3f73b |
.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
Packit |
d3f73b |
.nlh.nlmsg_seq = rth->dump = ++rth->seq,
|
|
Packit |
d3f73b |
.rtm.rtm_family = family,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (filter_fn) {
|
|
Packit |
d3f73b |
int err;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
err = filter_fn(&req.nlh, sizeof(req));
|
|
Packit |
d3f73b |
if (err)
|
|
Packit |
d3f73b |
return err;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, sizeof(req), 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_ruledump_req(struct rtnl_handle *rth, int family)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct fib_rule_hdr frh;
|
|
Packit |
d3f73b |
} req = {
|
|
Packit |
d3f73b |
.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)),
|
|
Packit |
d3f73b |
.nlh.nlmsg_type = RTM_GETRULE,
|
|
Packit |
d3f73b |
.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
Packit |
d3f73b |
.nlh.nlmsg_seq = rth->dump = ++rth->seq,
|
|
Packit |
d3f73b |
.frh.family = family
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, sizeof(req), 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_neighdump_req(struct rtnl_handle *rth, int family,
|
|
Packit |
d3f73b |
req_filter_fn_t filter_fn)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct ndmsg ndm;
|
|
Packit |
d3f73b |
char buf[256];
|
|
Packit |
d3f73b |
} req = {
|
|
Packit |
d3f73b |
.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)),
|
|
Packit |
d3f73b |
.nlh.nlmsg_type = RTM_GETNEIGH,
|
|
Packit |
d3f73b |
.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
Packit |
d3f73b |
.nlh.nlmsg_seq = rth->dump = ++rth->seq,
|
|
Packit |
d3f73b |
.ndm.ndm_family = family,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (filter_fn) {
|
|
Packit |
d3f73b |
int err;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
err = filter_fn(&req.nlh, sizeof(req));
|
|
Packit |
d3f73b |
if (err)
|
|
Packit |
d3f73b |
return err;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, sizeof(req), 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_neightbldump_req(struct rtnl_handle *rth, int family)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct ndtmsg ndtmsg;
|
|
Packit |
d3f73b |
} req = {
|
|
Packit |
d3f73b |
.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndtmsg)),
|
|
Packit |
d3f73b |
.nlh.nlmsg_type = RTM_GETNEIGHTBL,
|
|
Packit |
d3f73b |
.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
Packit |
d3f73b |
.nlh.nlmsg_seq = rth->dump = ++rth->seq,
|
|
Packit |
d3f73b |
.ndtmsg.ndtm_family = family,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, sizeof(req), 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_mdbdump_req(struct rtnl_handle *rth, int family)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct br_port_msg bpm;
|
|
Packit |
d3f73b |
} req = {
|
|
Packit |
d3f73b |
.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct br_port_msg)),
|
|
Packit |
d3f73b |
.nlh.nlmsg_type = RTM_GETMDB,
|
|
Packit |
d3f73b |
.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
Packit |
d3f73b |
.nlh.nlmsg_seq = rth->dump = ++rth->seq,
|
|
Packit |
d3f73b |
.bpm.family = family,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, sizeof(req), 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_netconfdump_req(struct rtnl_handle *rth, int family)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct netconfmsg ncm;
|
|
Packit |
d3f73b |
char buf[0] __aligned(NLMSG_ALIGNTO);
|
|
Packit |
d3f73b |
} req = {
|
|
Packit |
d3f73b |
.nlh.nlmsg_len = NLMSG_LENGTH(NLMSG_ALIGN(sizeof(struct netconfmsg))),
|
|
Packit |
d3f73b |
.nlh.nlmsg_type = RTM_GETNETCONF,
|
|
Packit |
d3f73b |
.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
Packit |
d3f73b |
.nlh.nlmsg_seq = rth->dump = ++rth->seq,
|
|
Packit |
d3f73b |
.ncm.ncm_family = family,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, sizeof(req), 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_nsiddump_req(struct rtnl_handle *rth, int family)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct rtgenmsg rtm;
|
|
Packit |
d3f73b |
char buf[0] __aligned(NLMSG_ALIGNTO);
|
|
Packit |
d3f73b |
} req = {
|
|
Packit |
d3f73b |
.nlh.nlmsg_len = NLMSG_LENGTH(NLMSG_ALIGN(sizeof(struct rtgenmsg))),
|
|
Packit |
d3f73b |
.nlh.nlmsg_type = RTM_GETNSID,
|
|
Packit |
d3f73b |
.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
Packit |
d3f73b |
.nlh.nlmsg_seq = rth->dump = ++rth->seq,
|
|
Packit |
d3f73b |
.rtm.rtgen_family = family,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, sizeof(req), 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
static int __rtnl_linkdump_req(struct rtnl_handle *rth, int family)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct ifinfomsg ifm;
|
|
Packit |
d3f73b |
} req = {
|
|
Packit |
d3f73b |
.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
|
|
Packit |
d3f73b |
.nlh.nlmsg_type = RTM_GETLINK,
|
|
Packit |
d3f73b |
.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
Packit |
d3f73b |
.nlh.nlmsg_seq = rth->dump = ++rth->seq,
|
|
Packit |
d3f73b |
.ifm.ifi_family = family,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, sizeof(req), 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_linkdump_req(struct rtnl_handle *rth, int family)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
if (family == AF_UNSPEC)
|
|
Packit |
d3f73b |
return rtnl_linkdump_req_filter(rth, family, RTEXT_FILTER_VF);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return __rtnl_linkdump_req(rth, family);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_linkdump_req_filter(struct rtnl_handle *rth, int family,
|
|
Packit |
d3f73b |
__u32 filt_mask)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
if (family == AF_UNSPEC || family == AF_BRIDGE) {
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct ifinfomsg ifm;
|
|
Packit |
d3f73b |
/* attribute has to be NLMSG aligned */
|
|
Packit |
d3f73b |
struct rtattr ext_req __aligned(NLMSG_ALIGNTO);
|
|
Packit |
d3f73b |
__u32 ext_filter_mask;
|
|
Packit |
d3f73b |
} req = {
|
|
Packit |
d3f73b |
.nlh.nlmsg_len = sizeof(req),
|
|
Packit |
d3f73b |
.nlh.nlmsg_type = RTM_GETLINK,
|
|
Packit |
d3f73b |
.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
Packit |
d3f73b |
.nlh.nlmsg_seq = rth->dump = ++rth->seq,
|
|
Packit |
d3f73b |
.ifm.ifi_family = family,
|
|
Packit |
d3f73b |
.ext_req.rta_type = IFLA_EXT_MASK,
|
|
Packit |
d3f73b |
.ext_req.rta_len = RTA_LENGTH(sizeof(__u32)),
|
|
Packit |
d3f73b |
.ext_filter_mask = filt_mask,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, sizeof(req), 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return __rtnl_linkdump_req(rth, family);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_linkdump_req_filter_fn(struct rtnl_handle *rth, int family,
|
|
Packit |
d3f73b |
req_filter_fn_t filter_fn)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
if (family == AF_UNSPEC || family == AF_PACKET) {
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct ifinfomsg ifm;
|
|
Packit |
d3f73b |
char buf[1024];
|
|
Packit |
d3f73b |
} req = {
|
|
Packit |
d3f73b |
.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
|
|
Packit |
d3f73b |
.nlh.nlmsg_type = RTM_GETLINK,
|
|
Packit |
d3f73b |
.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
Packit |
d3f73b |
.nlh.nlmsg_seq = rth->dump = ++rth->seq,
|
|
Packit |
d3f73b |
.ifm.ifi_family = family,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
int err;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (!filter_fn)
|
|
Packit |
d3f73b |
return -EINVAL;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
err = filter_fn(&req.nlh, sizeof(req));
|
|
Packit |
d3f73b |
if (err)
|
|
Packit |
d3f73b |
return err;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, req.nlh.nlmsg_len, 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return __rtnl_linkdump_req(rth, family);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_fdb_linkdump_req_filter_fn(struct rtnl_handle *rth,
|
|
Packit |
d3f73b |
req_filter_fn_t filter_fn)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct ifinfomsg ifm;
|
|
Packit |
d3f73b |
char buf[128];
|
|
Packit |
d3f73b |
} req = {
|
|
Packit |
d3f73b |
.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
|
|
Packit |
d3f73b |
.nlh.nlmsg_type = RTM_GETNEIGH,
|
|
Packit |
d3f73b |
.nlh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
Packit |
d3f73b |
.nlh.nlmsg_seq = rth->dump = ++rth->seq,
|
|
Packit |
d3f73b |
.ifm.ifi_family = PF_BRIDGE,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
int err;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
err = filter_fn(&req.nlh, sizeof(req));
|
|
Packit |
d3f73b |
if (err)
|
|
Packit |
d3f73b |
return err;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, sizeof(req), 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_statsdump_req_filter(struct rtnl_handle *rth, int fam, __u32 filt_mask)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct {
|
|
Packit |
d3f73b |
struct nlmsghdr nlh;
|
|
Packit |
d3f73b |
struct if_stats_msg ifsm;
|
|
Packit |
d3f73b |
} req;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
memset(&req, 0, sizeof(req));
|
|
Packit |
d3f73b |
req.nlh.nlmsg_len = NLMSG_LENGTH(sizeof(struct if_stats_msg));
|
|
Packit |
d3f73b |
req.nlh.nlmsg_type = RTM_GETSTATS;
|
|
Packit |
d3f73b |
req.nlh.nlmsg_flags = NLM_F_DUMP|NLM_F_REQUEST;
|
|
Packit |
d3f73b |
req.nlh.nlmsg_pid = 0;
|
|
Packit |
d3f73b |
req.nlh.nlmsg_seq = rth->dump = ++rth->seq;
|
|
Packit |
d3f73b |
req.ifsm.family = fam;
|
|
Packit |
d3f73b |
req.ifsm.filter_mask = filt_mask;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return send(rth->fd, &req, sizeof(req), 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_send(struct rtnl_handle *rth, const void *buf, int len)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
return send(rth->fd, buf, len, 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_send_check(struct rtnl_handle *rth, const void *buf, int len)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct nlmsghdr *h;
|
|
Packit |
d3f73b |
int status;
|
|
Packit |
d3f73b |
char resp[1024];
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
status = send(rth->fd, buf, len, 0);
|
|
Packit |
d3f73b |
if (status < 0)
|
|
Packit |
d3f73b |
return status;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
/* Check for immediate errors */
|
|
Packit |
d3f73b |
status = recv(rth->fd, resp, sizeof(resp), MSG_DONTWAIT|MSG_PEEK);
|
|
Packit |
d3f73b |
if (status < 0) {
|
|
Packit |
d3f73b |
if (errno == EAGAIN)
|
|
Packit |
d3f73b |
return 0;
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
for (h = (struct nlmsghdr *)resp; NLMSG_OK(h, status);
|
|
Packit |
d3f73b |
h = NLMSG_NEXT(h, status)) {
|
|
Packit |
d3f73b |
if (h->nlmsg_type == NLMSG_ERROR) {
|
|
Packit |
d3f73b |
struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(h);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr)))
|
|
Packit |
d3f73b |
fprintf(stderr, "ERROR truncated\n");
|
|
Packit |
d3f73b |
else
|
|
Packit |
d3f73b |
errno = -err->error;
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return 0;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct nlmsghdr nlh = {
|
|
Packit |
d3f73b |
.nlmsg_len = NLMSG_LENGTH(len),
|
|
Packit |
d3f73b |
.nlmsg_type = type,
|
|
Packit |
d3f73b |
.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
|
|
Packit |
d3f73b |
.nlmsg_seq = rth->dump = ++rth->seq,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
|
|
Packit |
d3f73b |
struct iovec iov[2] = {
|
|
Packit |
d3f73b |
{ .iov_base = &nlh, .iov_len = sizeof(nlh) },
|
|
Packit |
d3f73b |
{ .iov_base = req, .iov_len = len }
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
struct msghdr msg = {
|
|
Packit |
d3f73b |
.msg_name = &nladdr,
|
|
Packit |
d3f73b |
.msg_namelen = sizeof(nladdr),
|
|
Packit |
d3f73b |
.msg_iov = iov,
|
|
Packit |
d3f73b |
.msg_iovlen = 2,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return sendmsg(rth->fd, &msg, 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_dump_request_n(struct rtnl_handle *rth, struct nlmsghdr *n)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
|
|
Packit |
d3f73b |
struct iovec iov = {
|
|
Packit |
d3f73b |
.iov_base = n,
|
|
Packit |
d3f73b |
.iov_len = n->nlmsg_len
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
struct msghdr msg = {
|
|
Packit |
d3f73b |
.msg_name = &nladdr,
|
|
Packit |
d3f73b |
.msg_namelen = sizeof(nladdr),
|
|
Packit |
d3f73b |
.msg_iov = &iov,
|
|
Packit |
d3f73b |
.msg_iovlen = 1,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
n->nlmsg_flags = NLM_F_DUMP|NLM_F_REQUEST;
|
|
Packit |
d3f73b |
n->nlmsg_pid = 0;
|
|
Packit |
d3f73b |
n->nlmsg_seq = rth->dump = ++rth->seq;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return sendmsg(rth->fd, &msg, 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
static int rtnl_dump_done(struct nlmsghdr *h)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
int len = *(int *)NLMSG_DATA(h);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (h->nlmsg_len < NLMSG_LENGTH(sizeof(int))) {
|
|
Packit |
d3f73b |
fprintf(stderr, "DONE truncated\n");
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (len < 0) {
|
|
Packit |
d3f73b |
/* check for any messages returned from kernel */
|
|
Packit |
d3f73b |
if (nl_dump_ext_ack_done(h, len))
|
|
Packit |
d3f73b |
return len;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
errno = -len;
|
|
Packit |
d3f73b |
switch (errno) {
|
|
Packit |
d3f73b |
case ENOENT:
|
|
Packit |
d3f73b |
case EOPNOTSUPP:
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
case EMSGSIZE:
|
|
Packit |
d3f73b |
fprintf(stderr,
|
|
Packit |
d3f73b |
"Error: Buffer too small for object.\n");
|
|
Packit |
d3f73b |
break;
|
|
Packit |
d3f73b |
default:
|
|
Packit |
d3f73b |
perror("RTNETLINK answers");
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
return len;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
/* check for any messages returned from kernel */
|
|
Packit |
d3f73b |
nl_dump_ext_ack(h, NULL);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return 0;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
static void rtnl_dump_error(const struct rtnl_handle *rth,
|
|
Packit |
d3f73b |
struct nlmsghdr *h)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) {
|
|
Packit |
d3f73b |
fprintf(stderr, "ERROR truncated\n");
|
|
Packit |
d3f73b |
} else {
|
|
Packit |
d3f73b |
const struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(h);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
errno = -err->error;
|
|
Packit |
d3f73b |
if (rth->proto == NETLINK_SOCK_DIAG &&
|
|
Packit |
d3f73b |
(errno == ENOENT ||
|
|
Packit |
d3f73b |
errno == EOPNOTSUPP))
|
|
Packit |
d3f73b |
return;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (!(rth->flags & RTNL_HANDLE_F_SUPPRESS_NLERR))
|
|
Packit |
d3f73b |
perror("RTNETLINK answers");
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
static int __rtnl_recvmsg(int fd, struct msghdr *msg, int flags)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
int len;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
do {
|
|
Packit |
d3f73b |
len = recvmsg(fd, msg, flags);
|
|
Packit |
d3f73b |
} while (len < 0 && (errno == EINTR || errno == EAGAIN));
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (len < 0) {
|
|
Packit |
d3f73b |
fprintf(stderr, "netlink receive error %s (%d)\n",
|
|
Packit |
d3f73b |
strerror(errno), errno);
|
|
Packit |
d3f73b |
return -errno;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (len == 0) {
|
|
Packit |
d3f73b |
fprintf(stderr, "EOF on netlink\n");
|
|
Packit |
d3f73b |
return -ENODATA;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return len;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
static int rtnl_recvmsg(int fd, struct msghdr *msg, char **answer)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct iovec *iov = msg->msg_iov;
|
|
Packit |
d3f73b |
char *buf;
|
|
Packit |
d3f73b |
int len;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
iov->iov_base = NULL;
|
|
Packit |
d3f73b |
iov->iov_len = 0;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
len = __rtnl_recvmsg(fd, msg, MSG_PEEK | MSG_TRUNC);
|
|
Packit |
d3f73b |
if (len < 0)
|
|
Packit |
d3f73b |
return len;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (len < 32768)
|
|
Packit |
d3f73b |
len = 32768;
|
|
Packit |
d3f73b |
buf = malloc(len);
|
|
Packit |
d3f73b |
if (!buf) {
|
|
Packit |
d3f73b |
fprintf(stderr, "malloc error: not enough buffer\n");
|
|
Packit |
d3f73b |
return -ENOMEM;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
iov->iov_base = buf;
|
|
Packit |
d3f73b |
iov->iov_len = len;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
len = __rtnl_recvmsg(fd, msg, 0);
|
|
Packit |
d3f73b |
if (len < 0) {
|
|
Packit |
d3f73b |
free(buf);
|
|
Packit |
d3f73b |
return len;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (answer)
|
|
Packit |
d3f73b |
*answer = buf;
|
|
Packit |
d3f73b |
else
|
|
Packit |
d3f73b |
free(buf);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return len;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
static int rtnl_dump_filter_l(struct rtnl_handle *rth,
|
|
Packit |
d3f73b |
const struct rtnl_dump_filter_arg *arg)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct sockaddr_nl nladdr;
|
|
Packit |
d3f73b |
struct iovec iov;
|
|
Packit |
d3f73b |
struct msghdr msg = {
|
|
Packit |
d3f73b |
.msg_name = &nladdr,
|
|
Packit |
d3f73b |
.msg_namelen = sizeof(nladdr),
|
|
Packit |
d3f73b |
.msg_iov = &iov,
|
|
Packit |
d3f73b |
.msg_iovlen = 1,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
char *buf;
|
|
Packit |
d3f73b |
int dump_intr = 0;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
while (1) {
|
|
Packit |
d3f73b |
int status;
|
|
Packit |
d3f73b |
const struct rtnl_dump_filter_arg *a;
|
|
Packit |
d3f73b |
int found_done = 0;
|
|
Packit |
d3f73b |
int msglen = 0;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
status = rtnl_recvmsg(rth->fd, &msg, &buf;;
|
|
Packit |
d3f73b |
if (status < 0)
|
|
Packit |
d3f73b |
return status;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (rth->dump_fp)
|
|
Packit |
d3f73b |
fwrite(buf, 1, NLMSG_ALIGN(status), rth->dump_fp);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
for (a = arg; a->filter; a++) {
|
|
Packit |
d3f73b |
struct nlmsghdr *h = (struct nlmsghdr *)buf;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
msglen = status;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
while (NLMSG_OK(h, msglen)) {
|
|
Packit |
d3f73b |
int err = 0;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
h->nlmsg_flags &= ~a->nc_flags;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (nladdr.nl_pid != 0 ||
|
|
Packit |
d3f73b |
h->nlmsg_pid != rth->local.nl_pid ||
|
|
Packit |
d3f73b |
h->nlmsg_seq != rth->dump)
|
|
Packit |
d3f73b |
goto skip_it;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (h->nlmsg_flags & NLM_F_DUMP_INTR)
|
|
Packit |
d3f73b |
dump_intr = 1;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (h->nlmsg_type == NLMSG_DONE) {
|
|
Packit |
d3f73b |
err = rtnl_dump_done(h);
|
|
Packit |
d3f73b |
if (err < 0) {
|
|
Packit |
d3f73b |
free(buf);
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
found_done = 1;
|
|
Packit |
d3f73b |
break; /* process next filter */
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (h->nlmsg_type == NLMSG_ERROR) {
|
|
Packit |
d3f73b |
rtnl_dump_error(rth, h);
|
|
Packit |
d3f73b |
free(buf);
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (!rth->dump_fp) {
|
|
Packit |
d3f73b |
err = a->filter(h, a->arg1);
|
|
Packit |
d3f73b |
if (err < 0) {
|
|
Packit |
d3f73b |
free(buf);
|
|
Packit |
d3f73b |
return err;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
skip_it:
|
|
Packit |
d3f73b |
h = NLMSG_NEXT(h, msglen);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
free(buf);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (found_done) {
|
|
Packit |
d3f73b |
if (dump_intr)
|
|
Packit |
d3f73b |
fprintf(stderr,
|
|
Packit |
d3f73b |
"Dump was interrupted and may be inconsistent.\n");
|
|
Packit |
d3f73b |
return 0;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (msg.msg_flags & MSG_TRUNC) {
|
|
Packit |
d3f73b |
fprintf(stderr, "Message truncated\n");
|
|
Packit |
d3f73b |
continue;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
if (msglen) {
|
|
Packit |
d3f73b |
fprintf(stderr, "!!!Remnant of size %d\n", msglen);
|
|
Packit |
d3f73b |
exit(1);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_dump_filter_nc(struct rtnl_handle *rth,
|
|
Packit |
d3f73b |
rtnl_filter_t filter,
|
|
Packit |
d3f73b |
void *arg1, __u16 nc_flags)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
const struct rtnl_dump_filter_arg a[2] = {
|
|
Packit |
d3f73b |
{ .filter = filter, .arg1 = arg1, .nc_flags = nc_flags, },
|
|
Packit |
d3f73b |
{ .filter = NULL, .arg1 = NULL, .nc_flags = 0, },
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return rtnl_dump_filter_l(rth, a);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
static void rtnl_talk_error(struct nlmsghdr *h, struct nlmsgerr *err,
|
|
Packit |
d3f73b |
nl_ext_ack_fn_t errfn)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
if (nl_dump_ext_ack(h, errfn))
|
|
Packit |
d3f73b |
return;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
fprintf(stderr, "RTNETLINK answers: %s\n",
|
|
Packit |
d3f73b |
strerror(-err->error));
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
static int __rtnl_talk_iov(struct rtnl_handle *rtnl, struct iovec *iov,
|
|
Packit |
d3f73b |
size_t iovlen, struct nlmsghdr **answer,
|
|
Packit |
d3f73b |
bool show_rtnl_err, nl_ext_ack_fn_t errfn)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
|
|
Packit |
d3f73b |
struct iovec riov;
|
|
Packit |
d3f73b |
struct msghdr msg = {
|
|
Packit |
d3f73b |
.msg_name = &nladdr,
|
|
Packit |
d3f73b |
.msg_namelen = sizeof(nladdr),
|
|
Packit |
d3f73b |
.msg_iov = iov,
|
|
Packit |
d3f73b |
.msg_iovlen = iovlen,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
unsigned int seq = 0;
|
|
Packit |
d3f73b |
struct nlmsghdr *h;
|
|
Packit |
d3f73b |
int i, status;
|
|
Packit |
d3f73b |
char *buf;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
for (i = 0; i < iovlen; i++) {
|
|
Packit |
d3f73b |
h = iov[i].iov_base;
|
|
Packit |
d3f73b |
h->nlmsg_seq = seq = ++rtnl->seq;
|
|
Packit |
d3f73b |
if (answer == NULL)
|
|
Packit |
d3f73b |
h->nlmsg_flags |= NLM_F_ACK;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
status = sendmsg(rtnl->fd, &msg, 0);
|
|
Packit |
d3f73b |
if (status < 0) {
|
|
Packit |
d3f73b |
perror("Cannot talk to rtnetlink");
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
/* change msg to use the response iov */
|
|
Packit |
d3f73b |
msg.msg_iov = &rio;;
|
|
Packit |
d3f73b |
msg.msg_iovlen = 1;
|
|
Packit |
d3f73b |
i = 0;
|
|
Packit |
d3f73b |
while (1) {
|
|
Packit |
d3f73b |
next:
|
|
Packit |
d3f73b |
status = rtnl_recvmsg(rtnl->fd, &msg, &buf;;
|
|
Packit |
d3f73b |
++i;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (status < 0)
|
|
Packit |
d3f73b |
return status;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (msg.msg_namelen != sizeof(nladdr)) {
|
|
Packit |
d3f73b |
fprintf(stderr,
|
|
Packit |
d3f73b |
"sender address length == %d\n",
|
|
Packit |
d3f73b |
msg.msg_namelen);
|
|
Packit |
d3f73b |
exit(1);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
for (h = (struct nlmsghdr *)buf; status >= sizeof(*h); ) {
|
|
Packit |
d3f73b |
int len = h->nlmsg_len;
|
|
Packit |
d3f73b |
int l = len - sizeof(*h);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (l < 0 || len > status) {
|
|
Packit |
d3f73b |
if (msg.msg_flags & MSG_TRUNC) {
|
|
Packit |
d3f73b |
fprintf(stderr, "Truncated message\n");
|
|
Packit |
d3f73b |
free(buf);
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
fprintf(stderr,
|
|
Packit |
d3f73b |
"!!!malformed message: len=%d\n",
|
|
Packit |
d3f73b |
len);
|
|
Packit |
d3f73b |
exit(1);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (nladdr.nl_pid != 0 ||
|
|
Packit |
d3f73b |
h->nlmsg_pid != rtnl->local.nl_pid ||
|
|
Packit |
d3f73b |
h->nlmsg_seq > seq || h->nlmsg_seq < seq - iovlen) {
|
|
Packit |
d3f73b |
/* Don't forget to skip that message. */
|
|
Packit |
d3f73b |
status -= NLMSG_ALIGN(len);
|
|
Packit |
d3f73b |
h = (struct nlmsghdr *)((char *)h + NLMSG_ALIGN(len));
|
|
Packit |
d3f73b |
continue;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (h->nlmsg_type == NLMSG_ERROR) {
|
|
Packit |
d3f73b |
struct nlmsgerr *err = (struct nlmsgerr *)NLMSG_DATA(h);
|
|
Packit |
d3f73b |
int error = err->error;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (l < sizeof(struct nlmsgerr)) {
|
|
Packit |
d3f73b |
fprintf(stderr, "ERROR truncated\n");
|
|
Packit |
d3f73b |
free(buf);
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (!error) {
|
|
Packit |
d3f73b |
/* check messages from kernel */
|
|
Packit |
d3f73b |
nl_dump_ext_ack(h, errfn);
|
|
Packit |
d3f73b |
} else {
|
|
Packit |
d3f73b |
errno = -error;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (rtnl->proto != NETLINK_SOCK_DIAG &&
|
|
Packit |
d3f73b |
show_rtnl_err)
|
|
Packit |
d3f73b |
rtnl_talk_error(h, err, errfn);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (answer)
|
|
Packit |
d3f73b |
*answer = (struct nlmsghdr *)buf;
|
|
Packit |
d3f73b |
else
|
|
Packit |
d3f73b |
free(buf);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (i < iovlen)
|
|
Packit |
d3f73b |
goto next;
|
|
Packit |
d3f73b |
return error ? -i : 0;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (answer) {
|
|
Packit |
d3f73b |
*answer = (struct nlmsghdr *)buf;
|
|
Packit |
d3f73b |
return 0;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
fprintf(stderr, "Unexpected reply!!!\n");
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
status -= NLMSG_ALIGN(len);
|
|
Packit |
d3f73b |
h = (struct nlmsghdr *)((char *)h + NLMSG_ALIGN(len));
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
free(buf);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (msg.msg_flags & MSG_TRUNC) {
|
|
Packit |
d3f73b |
fprintf(stderr, "Message truncated\n");
|
|
Packit |
d3f73b |
continue;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (status) {
|
|
Packit |
d3f73b |
fprintf(stderr, "!!!Remnant of size %d\n", status);
|
|
Packit |
d3f73b |
exit(1);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
static int __rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n,
|
|
Packit |
d3f73b |
struct nlmsghdr **answer,
|
|
Packit |
d3f73b |
bool show_rtnl_err, nl_ext_ack_fn_t errfn)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct iovec iov = {
|
|
Packit |
d3f73b |
.iov_base = n,
|
|
Packit |
d3f73b |
.iov_len = n->nlmsg_len
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return __rtnl_talk_iov(rtnl, &iov, 1, answer, show_rtnl_err, errfn);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n,
|
|
Packit |
d3f73b |
struct nlmsghdr **answer)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
return __rtnl_talk(rtnl, n, answer, true, NULL);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_talk_iov(struct rtnl_handle *rtnl, struct iovec *iovec, size_t iovlen,
|
|
Packit |
d3f73b |
struct nlmsghdr **answer)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
return __rtnl_talk_iov(rtnl, iovec, iovlen, answer, true, NULL);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_talk_suppress_rtnl_errmsg(struct rtnl_handle *rtnl, struct nlmsghdr *n,
|
|
Packit |
d3f73b |
struct nlmsghdr **answer)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
return __rtnl_talk(rtnl, n, answer, false, NULL);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_listen_all_nsid(struct rtnl_handle *rth)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
unsigned int on = 1;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (setsockopt(rth->fd, SOL_NETLINK, NETLINK_LISTEN_ALL_NSID, &on,
|
|
Packit |
d3f73b |
sizeof(on)) < 0) {
|
|
Packit |
d3f73b |
perror("NETLINK_LISTEN_ALL_NSID");
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
rth->flags |= RTNL_HANDLE_F_LISTEN_ALL_NSID;
|
|
Packit |
d3f73b |
return 0;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_listen(struct rtnl_handle *rtnl,
|
|
Packit |
d3f73b |
rtnl_listen_filter_t handler,
|
|
Packit |
d3f73b |
void *jarg)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
int status;
|
|
Packit |
d3f73b |
struct nlmsghdr *h;
|
|
Packit |
d3f73b |
struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
|
|
Packit |
d3f73b |
struct iovec iov;
|
|
Packit |
d3f73b |
struct msghdr msg = {
|
|
Packit |
d3f73b |
.msg_name = &nladdr,
|
|
Packit |
d3f73b |
.msg_namelen = sizeof(nladdr),
|
|
Packit |
d3f73b |
.msg_iov = &iov,
|
|
Packit |
d3f73b |
.msg_iovlen = 1,
|
|
Packit |
d3f73b |
};
|
|
Packit |
d3f73b |
char buf[16384];
|
|
Packit |
d3f73b |
char cmsgbuf[BUFSIZ];
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (rtnl->flags & RTNL_HANDLE_F_LISTEN_ALL_NSID) {
|
|
Packit |
d3f73b |
msg.msg_control = &cmsgbuf;
|
|
Packit |
d3f73b |
msg.msg_controllen = sizeof(cmsgbuf);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
iov.iov_base = buf;
|
|
Packit |
d3f73b |
while (1) {
|
|
Packit |
d3f73b |
struct rtnl_ctrl_data ctrl;
|
|
Packit |
d3f73b |
struct cmsghdr *cmsg;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
iov.iov_len = sizeof(buf);
|
|
Packit |
d3f73b |
status = recvmsg(rtnl->fd, &msg, 0);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (status < 0) {
|
|
Packit |
d3f73b |
if (errno == EINTR || errno == EAGAIN)
|
|
Packit |
d3f73b |
continue;
|
|
Packit |
d3f73b |
fprintf(stderr, "netlink receive error %s (%d)\n",
|
|
Packit |
d3f73b |
strerror(errno), errno);
|
|
Packit |
d3f73b |
if (errno == ENOBUFS)
|
|
Packit |
d3f73b |
continue;
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
if (status == 0) {
|
|
Packit |
d3f73b |
fprintf(stderr, "EOF on netlink\n");
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
if (msg.msg_namelen != sizeof(nladdr)) {
|
|
Packit |
d3f73b |
fprintf(stderr,
|
|
Packit |
d3f73b |
"Sender address length == %d\n",
|
|
Packit |
d3f73b |
msg.msg_namelen);
|
|
Packit |
d3f73b |
exit(1);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (rtnl->flags & RTNL_HANDLE_F_LISTEN_ALL_NSID) {
|
|
Packit |
d3f73b |
memset(&ctrl, 0, sizeof(ctrl));
|
|
Packit |
d3f73b |
ctrl.nsid = -1;
|
|
Packit |
d3f73b |
for (cmsg = CMSG_FIRSTHDR(&msg;; cmsg;
|
|
Packit |
d3f73b |
cmsg = CMSG_NXTHDR(&msg, cmsg))
|
|
Packit |
d3f73b |
if (cmsg->cmsg_level == SOL_NETLINK &&
|
|
Packit |
d3f73b |
cmsg->cmsg_type == NETLINK_LISTEN_ALL_NSID &&
|
|
Packit |
d3f73b |
cmsg->cmsg_len == CMSG_LEN(sizeof(int))) {
|
|
Packit |
d3f73b |
int *data = (int *)CMSG_DATA(cmsg);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
ctrl.nsid = *data;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
for (h = (struct nlmsghdr *)buf; status >= sizeof(*h); ) {
|
|
Packit |
d3f73b |
int err;
|
|
Packit |
d3f73b |
int len = h->nlmsg_len;
|
|
Packit |
d3f73b |
int l = len - sizeof(*h);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (l < 0 || len > status) {
|
|
Packit |
d3f73b |
if (msg.msg_flags & MSG_TRUNC) {
|
|
Packit |
d3f73b |
fprintf(stderr, "Truncated message\n");
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
fprintf(stderr,
|
|
Packit |
d3f73b |
"!!!malformed message: len=%d\n",
|
|
Packit |
d3f73b |
len);
|
|
Packit |
d3f73b |
exit(1);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
err = handler(&ctrl, h, jarg);
|
|
Packit |
d3f73b |
if (err < 0)
|
|
Packit |
d3f73b |
return err;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
status -= NLMSG_ALIGN(len);
|
|
Packit |
d3f73b |
h = (struct nlmsghdr *)((char *)h + NLMSG_ALIGN(len));
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
if (msg.msg_flags & MSG_TRUNC) {
|
|
Packit |
d3f73b |
fprintf(stderr, "Message truncated\n");
|
|
Packit |
d3f73b |
continue;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
if (status) {
|
|
Packit |
d3f73b |
fprintf(stderr, "!!!Remnant of size %d\n", status);
|
|
Packit |
d3f73b |
exit(1);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rtnl_from_file(FILE *rtnl, rtnl_listen_filter_t handler,
|
|
Packit |
d3f73b |
void *jarg)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
int status;
|
|
Packit |
d3f73b |
char buf[16384];
|
|
Packit |
d3f73b |
struct nlmsghdr *h = (struct nlmsghdr *)buf;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
while (1) {
|
|
Packit |
d3f73b |
int err, len;
|
|
Packit |
d3f73b |
int l;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
status = fread(&buf, 1, sizeof(*h), rtnl);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (status < 0) {
|
|
Packit |
d3f73b |
if (errno == EINTR)
|
|
Packit |
d3f73b |
continue;
|
|
Packit |
d3f73b |
perror("rtnl_from_file: fread");
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
if (status == 0)
|
|
Packit |
d3f73b |
return 0;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
len = h->nlmsg_len;
|
|
Packit |
d3f73b |
l = len - sizeof(*h);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (l < 0 || len > sizeof(buf)) {
|
|
Packit |
d3f73b |
fprintf(stderr, "!!!malformed message: len=%d @%lu\n",
|
|
Packit |
d3f73b |
len, ftell(rtnl));
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
status = fread(NLMSG_DATA(h), 1, NLMSG_ALIGN(l), rtnl);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (status < 0) {
|
|
Packit |
d3f73b |
perror("rtnl_from_file: fread");
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
if (status < l) {
|
|
Packit |
d3f73b |
fprintf(stderr, "rtnl-from_file: truncated message\n");
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
err = handler(NULL, h, jarg);
|
|
Packit |
d3f73b |
if (err < 0)
|
|
Packit |
d3f73b |
return err;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int addattr(struct nlmsghdr *n, int maxlen, int type)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
return addattr_l(n, maxlen, type, NULL, 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
return addattr_l(n, maxlen, type, &data, sizeof(__u8));
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
return addattr_l(n, maxlen, type, &data, sizeof(__u16));
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
return addattr_l(n, maxlen, type, &data, sizeof(__u32));
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
return addattr_l(n, maxlen, type, &data, sizeof(__u64));
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int addattrstrz(struct nlmsghdr *n, int maxlen, int type, const char *str)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
return addattr_l(n, maxlen, type, str, strlen(str)+1);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data,
|
|
Packit |
d3f73b |
int alen)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
int len = RTA_LENGTH(alen);
|
|
Packit |
d3f73b |
struct rtattr *rta;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(len) > maxlen) {
|
|
Packit |
d3f73b |
fprintf(stderr,
|
|
Packit |
d3f73b |
"addattr_l ERROR: message exceeded bound of %d\n",
|
|
Packit |
d3f73b |
maxlen);
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
rta = NLMSG_TAIL(n);
|
|
Packit |
d3f73b |
rta->rta_type = type;
|
|
Packit |
d3f73b |
rta->rta_len = len;
|
|
Packit |
d3f73b |
if (alen)
|
|
Packit |
d3f73b |
memcpy(RTA_DATA(rta), data, alen);
|
|
Packit |
d3f73b |
n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(len);
|
|
Packit |
d3f73b |
return 0;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
if (NLMSG_ALIGN(n->nlmsg_len) + NLMSG_ALIGN(len) > maxlen) {
|
|
Packit |
d3f73b |
fprintf(stderr,
|
|
Packit |
d3f73b |
"addraw_l ERROR: message exceeded bound of %d\n",
|
|
Packit |
d3f73b |
maxlen);
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
memcpy(NLMSG_TAIL(n), data, len);
|
|
Packit |
d3f73b |
memset((void *) NLMSG_TAIL(n) + len, 0, NLMSG_ALIGN(len) - len);
|
|
Packit |
d3f73b |
n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + NLMSG_ALIGN(len);
|
|
Packit |
d3f73b |
return 0;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct rtattr *nest = NLMSG_TAIL(n);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
addattr_l(n, maxlen, type, NULL, 0);
|
|
Packit |
d3f73b |
return nest;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
nest->rta_len = (void *)NLMSG_TAIL(n) - (void *)nest;
|
|
Packit |
d3f73b |
return n->nlmsg_len;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen, int type,
|
|
Packit |
d3f73b |
const void *data, int len)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct rtattr *start = NLMSG_TAIL(n);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
addattr_l(n, maxlen, type, data, len);
|
|
Packit |
d3f73b |
addattr_nest(n, maxlen, type);
|
|
Packit |
d3f73b |
return start;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *start)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct rtattr *nest = (void *)start + NLMSG_ALIGN(start->rta_len);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
start->rta_len = (void *)NLMSG_TAIL(n) - (void *)start;
|
|
Packit |
d3f73b |
addattr_nest_end(n, nest);
|
|
Packit |
d3f73b |
return n->nlmsg_len;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
int len = RTA_LENGTH(4);
|
|
Packit |
d3f73b |
struct rtattr *subrta;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (RTA_ALIGN(rta->rta_len) + len > maxlen) {
|
|
Packit |
d3f73b |
fprintf(stderr,
|
|
Packit |
d3f73b |
"rta_addattr32: Error! max allowed bound %d exceeded\n",
|
|
Packit |
d3f73b |
maxlen);
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
subrta = (struct rtattr *)(((char *)rta) + RTA_ALIGN(rta->rta_len));
|
|
Packit |
d3f73b |
subrta->rta_type = type;
|
|
Packit |
d3f73b |
subrta->rta_len = len;
|
|
Packit |
d3f73b |
memcpy(RTA_DATA(subrta), &data, 4);
|
|
Packit |
d3f73b |
rta->rta_len = NLMSG_ALIGN(rta->rta_len) + len;
|
|
Packit |
d3f73b |
return 0;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rta_addattr_l(struct rtattr *rta, int maxlen, int type,
|
|
Packit |
d3f73b |
const void *data, int alen)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct rtattr *subrta;
|
|
Packit |
d3f73b |
int len = RTA_LENGTH(alen);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (RTA_ALIGN(rta->rta_len) + RTA_ALIGN(len) > maxlen) {
|
|
Packit |
d3f73b |
fprintf(stderr,
|
|
Packit |
d3f73b |
"rta_addattr_l: Error! max allowed bound %d exceeded\n",
|
|
Packit |
d3f73b |
maxlen);
|
|
Packit |
d3f73b |
return -1;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
subrta = (struct rtattr *)(((char *)rta) + RTA_ALIGN(rta->rta_len));
|
|
Packit |
d3f73b |
subrta->rta_type = type;
|
|
Packit |
d3f73b |
subrta->rta_len = len;
|
|
Packit |
d3f73b |
if (alen)
|
|
Packit |
d3f73b |
memcpy(RTA_DATA(subrta), data, alen);
|
|
Packit |
d3f73b |
rta->rta_len = NLMSG_ALIGN(rta->rta_len) + RTA_ALIGN(len);
|
|
Packit |
d3f73b |
return 0;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rta_addattr8(struct rtattr *rta, int maxlen, int type, __u8 data)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
return rta_addattr_l(rta, maxlen, type, &data, sizeof(__u8));
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rta_addattr16(struct rtattr *rta, int maxlen, int type, __u16 data)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
return rta_addattr_l(rta, maxlen, type, &data, sizeof(__u16));
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rta_addattr64(struct rtattr *rta, int maxlen, int type, __u64 data)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
return rta_addattr_l(rta, maxlen, type, &data, sizeof(__u64));
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
struct rtattr *rta_nest(struct rtattr *rta, int maxlen, int type)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
struct rtattr *nest = RTA_TAIL(rta);
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
rta_addattr_l(rta, maxlen, type, NULL, 0);
|
|
Packit |
d3f73b |
nest->rta_type |= NLA_F_NESTED;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return nest;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int rta_nest_end(struct rtattr *rta, struct rtattr *nest)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
nest->rta_len = (void *)RTA_TAIL(rta) - (void *)nest;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
return rta->rta_len;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
return parse_rtattr_flags(tb, max, rta, len, 0);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int parse_rtattr_flags(struct rtattr *tb[], int max, struct rtattr *rta,
|
|
Packit |
d3f73b |
int len, unsigned short flags)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
unsigned short type;
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
memset(tb, 0, sizeof(struct rtattr *) * (max + 1));
|
|
Packit |
d3f73b |
while (RTA_OK(rta, len)) {
|
|
Packit |
d3f73b |
type = rta->rta_type & ~flags;
|
|
Packit |
d3f73b |
if ((type <= max) && (!tb[type]))
|
|
Packit |
d3f73b |
tb[type] = rta;
|
|
Packit |
d3f73b |
rta = RTA_NEXT(rta, len);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
if (len)
|
|
Packit |
d3f73b |
fprintf(stderr, "!!!Deficit %d, rta_len=%d\n",
|
|
Packit |
d3f73b |
len, rta->rta_len);
|
|
Packit |
d3f73b |
return 0;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
struct rtattr *parse_rtattr_one(int type, struct rtattr *rta, int len)
|
|
Packit |
d3f73b |
{
|
|
Packit |
d3f73b |
while (RTA_OK(rta, len)) {
|
|
Packit |
d3f73b |
if (rta->rta_type == type)
|
|
Packit |
d3f73b |
return rta;
|
|
Packit |
d3f73b |
rta = RTA_NEXT(rta, len);
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
if (len)
|
|
Packit |
d3f73b |
fprintf(stderr, "!!!Deficit %d, rta_len=%d\n",
|
|
Packit |
d3f73b |
len, rta->rta_len);
|
|
Packit |
d3f73b |
return NULL;
|
|
Packit |
d3f73b |
}
|
|
Packit |
d3f73b |
|
|
Packit |
d3f73b |
int __parse_rtattr_nested_compat(struct rtattr *tb[], int max,
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Packit |
d3f73b |
struct rtattr *rta,
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Packit |
d3f73b |
int len)
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Packit |
d3f73b |
{
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Packit |
d3f73b |
if (RTA_PAYLOAD(rta) < len)
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Packit |
d3f73b |
return -1;
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Packit |
d3f73b |
if (RTA_PAYLOAD(rta) >= RTA_ALIGN(len) + sizeof(struct rtattr)) {
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Packit |
d3f73b |
rta = RTA_DATA(rta) + RTA_ALIGN(len);
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Packit |
d3f73b |
return parse_rtattr_nested(tb, max, rta);
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Packit |
d3f73b |
}
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Packit |
d3f73b |
memset(tb, 0, sizeof(struct rtattr *) * (max + 1));
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Packit |
d3f73b |
return 0;
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Packit |
d3f73b |
}
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