Implements link state detection.
Also changes some symbol names (IFF_ADMIN_DOWN -> IFF_SHUTDOWN, IFF_LINK_UP -> IFF_ADMIN_UP).
This commit is contained in:
Ondrej Zajicek
parent
5cdf264f93
commit
f25cb0ef9f
26
nest/iface.c
26
nest/iface.c
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@ -67,13 +67,13 @@ if_dump(struct iface *i)
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struct ifa *a;
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debug("IF%d: %s", i->index, i->name);
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if (i->flags & IF_ADMIN_DOWN)
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debug(" ADMIN-DOWN");
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if (i->flags & IF_SHUTDOWN)
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debug(" SHUTDOWN");
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if (i->flags & IF_UP)
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debug(" UP");
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else
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debug(" DOWN");
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if (i->flags & IF_LINK_UP)
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if (i->flags & IF_ADMIN_UP)
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debug(" LINK-UP");
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if (i->flags & IF_MULTIACCESS)
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debug(" MA");
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@ -117,12 +117,14 @@ if_what_changed(struct iface *i, struct iface *j)
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{
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unsigned c;
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if (((i->flags ^ j->flags) & ~(IF_UP | IF_ADMIN_DOWN | IF_UPDATED | IF_LINK_UP | IF_TMP_DOWN | IF_JUST_CREATED))
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if (((i->flags ^ j->flags) & ~(IF_UP | IF_SHUTDOWN | IF_UPDATED | IF_ADMIN_UP | IF_TMP_DOWN | IF_JUST_CREATED))
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|| i->index != j->index)
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return IF_CHANGE_TOO_MUCH;
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c = 0;
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if ((i->flags ^ j->flags) & IF_UP)
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c |= (i->flags & IF_UP) ? IF_CHANGE_DOWN : IF_CHANGE_UP;
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if ((i->flags ^ j->flags) & IF_LINK_UP)
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c |= IF_CHANGE_LINK;
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if (i->mtu != j->mtu)
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c |= IF_CHANGE_MTU;
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return c;
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@ -169,6 +171,7 @@ if_send_notify(struct proto *p, unsigned c, struct iface *i)
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(c & IF_CHANGE_UP) ? "goes up" :
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(c & IF_CHANGE_DOWN) ? "goes down" :
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(c & IF_CHANGE_MTU) ? "changes MTU" :
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(c & IF_CHANGE_LINK) ? "changes link" :
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(c & IF_CHANGE_CREATE) ? "created" :
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"sends unknown event");
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p->if_notify(p, c, i);
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@ -217,8 +220,8 @@ if_notify_change(unsigned c, struct iface *i)
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static unsigned
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if_recalc_flags(struct iface *i, unsigned flags)
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{
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if ((flags & (IF_ADMIN_DOWN | IF_TMP_DOWN)) ||
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!(flags & IF_LINK_UP) ||
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if ((flags & (IF_SHUTDOWN | IF_TMP_DOWN)) ||
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!(flags & IF_ADMIN_UP) ||
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!i->addr)
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flags &= ~IF_UP;
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else
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@ -325,7 +328,7 @@ if_end_update(void)
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WALK_LIST(i, iface_list)
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{
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if (!(i->flags & IF_UPDATED))
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if_change_flags(i, (i->flags & ~IF_LINK_UP) | IF_ADMIN_DOWN);
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if_change_flags(i, (i->flags & ~IF_ADMIN_UP) | IF_SHUTDOWN);
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else
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{
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WALK_LIST_DELSAFE(a, b, i->addrs)
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@ -535,8 +538,8 @@ auto_router_id(void)
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j = NULL;
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WALK_LIST(i, iface_list)
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if ((i->flags & IF_LINK_UP) &&
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!(i->flags & (IF_IGNORE | IF_ADMIN_DOWN)) &&
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if ((i->flags & IF_ADMIN_UP) &&
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!(i->flags & (IF_IGNORE | IF_SHUTDOWN)) &&
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i->addr &&
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!(i->addr->flags & IA_UNNUMBERED) &&
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(!j || ipa_to_u32(i->addr->ip) < ipa_to_u32(j->addr->ip)))
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@ -694,6 +697,9 @@ if_show(void)
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WALK_LIST(i, iface_list)
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{
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if (i->flags & IF_SHUTDOWN)
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continue;
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cli_msg(-1001, "%s %s (index=%d)", i->name, (i->flags & IF_UP) ? "up" : "DOWN", i->index);
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if (!(i->flags & IF_MULTIACCESS))
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type = "PtP";
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@ -703,7 +709,7 @@ if_show(void)
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type,
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(i->flags & IF_BROADCAST) ? " Broadcast" : "",
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(i->flags & IF_MULTICAST) ? " Multicast" : "",
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(i->flags & IF_ADMIN_DOWN) ? "Down" : "Up",
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(i->flags & IF_ADMIN_UP) ? "Up" : "Down",
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(i->flags & IF_LINK_UP) ? "Up" : "Down",
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(i->flags & IF_LOOPBACK) ? " Loopback" : "",
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(i->flags & IF_IGNORE) ? " Ignored" : "",
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@ -39,14 +39,15 @@ struct iface {
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list neighbors; /* All neighbors on this interface */
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};
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#define IF_UP 1 /* IF_LINK_UP and IP address known */
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#define IF_UP 1 /* IF_ADMIN_UP and IP address known */
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#define IF_MULTIACCESS 2
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#define IF_BROADCAST 4
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#define IF_MULTICAST 8
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#define IF_ADMIN_DOWN 0x10
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#define IF_SHUTDOWN 0x10 /* Interface disappeared */
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#define IF_LOOPBACK 0x20
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#define IF_IGNORE 0x40 /* Not to be used by routing protocols (loopbacks etc.) */
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#define IF_LINK_UP 0x80
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#define IF_ADMIN_UP 0x80 /* Administrative up (e.q. IFF_UP in Linux) */
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#define IF_LINK_UP 0x100 /* Link available (e.q. IFF_LOWER_UP in Linux) */
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#define IA_PRIMARY 0x10000 /* This address is primary */
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#define IA_SECONDARY 0x20000 /* This address has been reported as secondary by the kernel */
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@ -63,6 +64,7 @@ struct iface {
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#define IF_CHANGE_DOWN 2
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#define IF_CHANGE_MTU 4
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#define IF_CHANGE_CREATE 8 /* Seen this interface for the first time */
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#define IF_CHANGE_LINK 0x10
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#define IF_CHANGE_TOO_MUCH 0x40000000 /* Used internally */
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void if_init(void);
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@ -456,7 +456,9 @@ krt_read_ifinfo(struct ks_msg *msg)
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f.flags = 0;
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if (fl & IFF_UP)
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f.flags |= IF_LINK_UP;
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f.flags |= IF_ADMIN_UP;
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if (ifm->ifm_data.ifi_link_state != LINK_STATE_DOWN)
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f.flags |= IF_LINK_UP; /* up or unknown */
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if (fl & IFF_LOOPBACK) /* Loopback */
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f.flags |= IF_MULTIACCESS | IF_LOOPBACK | IF_IGNORE;
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else if (fl & IFF_POINTOPOINT) /* PtP */
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@ -8,7 +8,6 @@
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#include <stdio.h>
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#include <fcntl.h>
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#include <net/if.h>
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#include <sys/socket.h>
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#include <sys/uio.h>
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#include <errno.h>
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@ -27,6 +26,7 @@
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#include "conf/conf.h"
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#include <asm/types.h>
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#include <linux/if.h>
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#include <linux/netlink.h>
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#include <linux/rtnetlink.h>
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@ -34,6 +34,10 @@
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#define MSG_TRUNC 0x20
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#endif
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#ifndef IFF_LOWER_UP
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#define IFF_LOWER_UP 0x10000
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#endif
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/*
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* Synchronous Netlink interface
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*/
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@ -281,6 +285,8 @@ nl_parse_link(struct nlmsghdr *h, int scan)
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u32 mtu;
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unsigned int fl;
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debug("nl_parse_link %d\n", new);
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if (!(i = nl_checkin(h, sizeof(*i))) || !nl_parse_attrs(IFLA_RTA(i), a, sizeof(a)))
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return;
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if (!a[IFLA_IFNAME] || RTA_PAYLOAD(a[IFLA_IFNAME]) < 2 ||
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@ -293,6 +299,8 @@ nl_parse_link(struct nlmsghdr *h, int scan)
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name = RTA_DATA(a[IFLA_IFNAME]);
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memcpy(&mtu, RTA_DATA(a[IFLA_MTU]), sizeof(u32));
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debug("nl_parse_link name %s index %d flags %x\n", name, i->ifi_index, i->ifi_flags);
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ifi = if_find_by_index(i->ifi_index);
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if (!new)
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{
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@ -300,7 +308,7 @@ nl_parse_link(struct nlmsghdr *h, int scan)
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if (ifi && !scan)
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{
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memcpy(&f, ifi, sizeof(struct iface));
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f.flags |= IF_ADMIN_DOWN;
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f.flags |= IF_SHUTDOWN;
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if_update(&f);
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}
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}
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@ -319,6 +327,8 @@ nl_parse_link(struct nlmsghdr *h, int scan)
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f.flags = 0;
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fl = i->ifi_flags;
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if (fl & IFF_UP)
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f.flags |= IF_ADMIN_UP;
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if (fl & IFF_LOWER_UP)
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f.flags |= IF_LINK_UP;
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if (fl & IFF_LOOPBACK) /* Loopback */
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f.flags |= IF_MULTIACCESS | IF_LOOPBACK | IF_IGNORE;
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@ -78,12 +78,12 @@ scan_ifs(struct ifreq *r, int cnt)
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faulty:
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log(L_ERR "%s(%s): %m", err, i.name);
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bad:
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i.flags = (i.flags & ~IF_LINK_UP) | IF_ADMIN_DOWN;
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i.flags = (i.flags & ~IF_ADMIN_UP) | IF_SHUTDOWN;
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continue;
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}
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fl = r->ifr_flags;
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if (fl & IFF_UP)
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i.flags |= IF_LINK_UP;
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i.flags |= IF_ADMIN_UP;
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if (ioctl(if_scan_sock, SIOCGIFNETMASK, r) < 0)
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{ err = "SIOCGIFNETMASK"; goto faulty; }
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