4e964aa05c
This cleans up handling of MTU values across the codebase. Previously MTU values where stored sometimes in uint32_t, sometimes in uint16_t, sometimes unsigned and sometimes in size_t. This now unifies this to uint32_t across the codebase, as that's what netlink spits out, and what the majority was already using. Also, all MTU parameters are now parsed with config_parse_mtu() and config_parse_ipv6_mtu() is dropped as it is now unneeded. (Note there is one exception for the MTU typing: in the DCHPv4 code we continue to process the MTU as uint16_t value, as it is encoded like that in the protocol, and it's probably better stay close to the protocol there.)
114 lines
2.8 KiB
C
114 lines
2.8 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
|
|
/***
|
|
This file is part of systemd.
|
|
|
|
Copyright (C) 2013 Tom Gundersen <teg@jklm.no>
|
|
***/
|
|
|
|
#include "sd-netlink.h"
|
|
|
|
#include "netlink-internal.h"
|
|
#include "netlink-util.h"
|
|
|
|
int rtnl_set_link_name(sd_netlink **rtnl, int ifindex, const char *name) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL;
|
|
int r;
|
|
|
|
assert(rtnl);
|
|
assert(ifindex > 0);
|
|
assert(name);
|
|
|
|
if (!*rtnl) {
|
|
r = sd_netlink_open(rtnl);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = sd_rtnl_message_new_link(*rtnl, &message, RTM_SETLINK, ifindex);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_message_append_string(message, IFLA_IFNAME, name);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_netlink_call(*rtnl, message, 0, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtnl_set_link_properties(sd_netlink **rtnl, int ifindex, const char *alias,
|
|
const struct ether_addr *mac, uint32_t mtu) {
|
|
_cleanup_(sd_netlink_message_unrefp) sd_netlink_message *message = NULL;
|
|
int r;
|
|
|
|
assert(rtnl);
|
|
assert(ifindex > 0);
|
|
|
|
if (!alias && !mac && mtu == 0)
|
|
return 0;
|
|
|
|
if (!*rtnl) {
|
|
r = sd_netlink_open(rtnl);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = sd_rtnl_message_new_link(*rtnl, &message, RTM_SETLINK, ifindex);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (alias) {
|
|
r = sd_netlink_message_append_string(message, IFLA_IFALIAS, alias);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (mac) {
|
|
r = sd_netlink_message_append_ether_addr(message, IFLA_ADDRESS, mac);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
if (mtu != 0) {
|
|
r = sd_netlink_message_append_u32(message, IFLA_MTU, mtu);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
|
|
r = sd_netlink_call(*rtnl, message, 0, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtnl_message_new_synthetic_error(sd_netlink *rtnl, int error, uint32_t serial, sd_netlink_message **ret) {
|
|
struct nlmsgerr *err;
|
|
int r;
|
|
|
|
assert(error <= 0);
|
|
|
|
r = message_new(rtnl, ret, NLMSG_ERROR);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
(*ret)->hdr->nlmsg_seq = serial;
|
|
|
|
err = NLMSG_DATA((*ret)->hdr);
|
|
|
|
err->error = error;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtnl_log_parse_error(int r) {
|
|
return log_error_errno(r, "Failed to parse netlink message: %m");
|
|
}
|
|
|
|
int rtnl_log_create_error(int r) {
|
|
return log_error_errno(r, "Failed to create netlink message: %m");
|
|
}
|