Improve network device scanning in the netdev module. First, make it use the
`device.subr' framework (improving performane and reducing sub-shells). Next improve the `device.subr' framework itself. Make use of the `flags' device struct member for network interfaces to indicate if an interface is Active, Wired Ethernet, or 802.11 Wireless. Functions have been added to make checks against the `flags' bit-field quick and efficient. Last, add function for rescanning the network to update the device registers. Remove an unnecessary local (ifn) while we're here (use already provided local `if').
This commit is contained in:
Devin Teske
parent
baf4f1f082
commit
2cc6c69d05
@ -28,6 +28,12 @@
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#
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############################################################ INCLUDES
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# Prevent device.subr (included indirectly) from auto scanning; this will be
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# performed indirectly later via f_dialog_menu_netdev() -- but only after we've
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# successfully completed f_mustberoot_init().
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#
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DEVICE_SELF_SCAN_ALL=NO
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BSDCFG_SHARE="/usr/share/bsdconfig"
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. $BSDCFG_SHARE/common.subr || exit 1
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f_dprintf "%s: loading includes..." "$0"
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@ -74,8 +74,10 @@ f_dialog_menu_netdev()
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#
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# Get list of usable network interfaces
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#
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local if iflist= # Calculated below
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for if in $( ifconfig -l ); do
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local devs if iflist= # Calculated below
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f_device_rescan_network
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f_device_find "" $DEVICE_TYPE_NETWORK devs
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for if in $devs; do
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# Skip unsavory interfaces
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case "$if" in
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lo[0-9]*|ppp[0-9]*|sl[0-9]*|faith[0-9]*) continue ;;
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@ -91,9 +93,8 @@ f_dialog_menu_netdev()
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if [ "$DIALOG_MENU_NETDEV_KICK_INTERFACES" ]; then
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DIALOG_MENU_NETDEV_KICK_INTERFACES=
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local ifn
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for ifn in $iflist; do
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f_quietly ifconfig $ifn up
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for if in $iflist; do
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f_quietly ifconfig $if up
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done
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if [ "$DIALOG_MENU_NETDEV_SLEEP_AFTER_KICK" ]; then
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@ -107,13 +108,14 @@ f_dialog_menu_netdev()
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# to the right of the device name.
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#
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menu_list=$(
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for ifn in $iflist; do
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active=$( ifconfig $ifn 2> /dev/null | awk '
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($1 == "status:") {
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if ($2 == "active") { print 1; exit }
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}' )
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printf "'%s%s' '%s'\n" \
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$ifn "${active:+*}" "$( f_device_desc $ifn )"
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for if in $iflist; do
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f_device_desc $if $DEVICE_TYPE_NETWORK desc
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f_shell_escape "$desc" desc
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if f_device_is_active $if; then
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printf "'%s\*' '%s'\n" $if "$desc"
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else
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printf "'%s' '%s'\n" $if "$desc"
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fi
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done
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)
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if [ ! "$menu_list" ]; then
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@ -121,21 +123,14 @@ f_dialog_menu_netdev()
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return $DIALOG_CANCEL
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fi
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#
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# Maybe the default item was marked as active
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#
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if [ "$defaultitem" ]; then
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ifconfig "$defaultitem" 2> /dev/null |
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awk '($1 == "status:" && $2 == "active"){exit 1}' ||
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defaultitem="$defaultitem*"
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fi
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local hline="$hline_arrows_tab_enter"
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f_device_is_active "$defaultitem" && defaultitem="$defaultitem*"
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#
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# Ask user to select an interface
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#
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local prompt="$msg_select_network_interface"
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local hline="$hline_arrows_tab_enter"
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local height width rows
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eval f_dialog_menu_size height width rows \
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\"\$DIALOG_TITLE\" \
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@ -76,6 +76,11 @@ setvar DEVICE_TYPE_ANY 11
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setvar DEVICE_TYPE_HTTP_PROXY 12
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setvar DEVICE_TYPE_HTTP 13
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# Network devices have the following flags available
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setvar IF_ETHERNET 1
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setvar IF_WIRELESS 2
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setvar IF_ACTIVE 4
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#
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# Default behavior is to call f_device_get_all() automatically when loaded.
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#
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@ -175,6 +180,33 @@ f_device_reset()
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DEVICES=
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}
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# f_device_reset_network
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#
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# Reset the registered network device chain.
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#
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f_device_reset_network()
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{
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local dev type private pruned_list=
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for dev in $DEVICES; do
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device_$dev get type type
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if [ "$type" != "$DEVICE_TYPE_NETWORK" ]; then
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pruned_list="$pruned_list $dev"
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continue
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fi
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#
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# Leave the device up (don't call shutdown routine)
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#
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# Network devices may have DEVICE_INFO private member
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device_$dev get private private
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[ "$private" ] && f_struct_free "$private"
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f_struct_free device_$dev
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done
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DEVICES="${pruned_list# }"
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}
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# f_device_get_all
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#
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# Get all device information for devices we have attached.
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@ -187,20 +219,7 @@ f_device_get_all()
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f_dialog_info "$msg_probing_devices_please_wait_this_can_take_a_while"
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# First go for the network interfaces
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for devname in $( ifconfig -l ); do
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# Eliminate network devices that don't make sense
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case "$devname" in
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lo*) continue ;;
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esac
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# Try and find its description
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f_device_desc "$devname" $DEVICE_TYPE_NETWORK desc
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f_dprintf "Found a network device named %s" "$devname"
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f_device_register $devname \
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"$desc" "$devname" $DEVICE_TYPE_NETWORK 1 \
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f_media_init_network "" f_media_shutdown_network "" -1
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done
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f_device_get_all_network
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# Next, try to find all the types of devices one might use
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# as a media source for content
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@ -378,6 +397,48 @@ f_device_get_all()
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done # disks
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}
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# f_device_get_all_network
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#
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# Get all network device information for attached network devices.
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#
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f_device_get_all_network()
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{
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local devname desc flags
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for devname in $( ifconfig -l ); do
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# Eliminate network devices that don't make sense
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case "$devname" in
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lo*) continue ;;
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esac
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# Try and find its description
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f_device_desc "$devname" $DEVICE_TYPE_NETWORK desc
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f_dprintf "Found a network device named %s" "$devname"
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f_device_register $devname \
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"$desc" "$devname" $DEVICE_TYPE_NETWORK 1 \
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f_media_init_network "" f_media_shutdown_network "" -1
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# Set flags based on media and status
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flags=0
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eval "$( ifconfig $devname 2> /dev/null | awk -v var=flags '
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function _or(var, mask) {
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printf "%s=$(( $%s | $%s ))\n", var, var, mask
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}
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BEGIN { S = "[[:space:]]+" }
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{
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if (!match($0, "^" S "(media|status):" S)) next
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value = substr($0, RLENGTH + 1)
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if ($1 == "media:") {
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if (value ~ /Ethernet/) _or(var, "IF_ETHERNET")
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if (value ~ /802\.11/) _or(var, "IF_WIRELESS")
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} else if ($1 == "status:") {
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if (value ~ /^active/) _or(var, "IF_ACTIVE")
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}
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}' )"
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device_$devname set flags $flags
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done
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}
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# f_device_name_get $type $name type|desc|max [$var_to_set]
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#
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# Fetch the device type (type), description (desc), or maximum number of
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@ -571,6 +632,72 @@ f_device_desc()
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return $FAILURE
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}
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# f_device_is_ethernet $device
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#
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# Returns true if $device is a wired Ethernet network interface. Otherwise
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# returns false. Example wired interfaces include: fxp0 em0 bge0 rl0 etc.
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#
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f_device_is_ethernet()
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{
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local dev="$1" type flags
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# Make sure we have an actual device by that name
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f_struct "device_$dev" || return $FAILURE
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# Make sure that the device is a network device
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device_$dev get type type
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[ "$type" = "$DEVICE_TYPE_NETWORK" ] || return $FAILURE
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# Make sure that the media flags indicate that it is Ethernet
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device_$dev get flags flags
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[ $(( ${flags:-0} & $IF_ETHERNET )) -eq $IF_ETHERNET ]
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}
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# f_device_is_wireless $device
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#
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# Returns true if $device is a Wireless network interface. Otherwise returns
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# false. Examples of wireless interfaces include: iwn0
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#
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f_device_is_wireless()
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{
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local dev="$1" type flags
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# Make sure we have an actual device by that name
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f_struct "device_$dev" || return $FAILURE
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# Make sure that the device is a network device
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device_$dev get type type
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[ "$type" = "$DEVICE_TYPE_NETWORK" ] || return $FAILURE
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# Make sure that the media flags indicate that it is Ethernet
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device_$dev get flags flags
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[ $(( ${flags:-0} & $IF_WIRELESS )) -eq $IF_WIRELESS ]
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}
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# f_device_is_active $device
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#
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# Returns true if $device is active. Otherwise returns false. Currently this
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# only works for network interfaces.
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#
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f_device_is_active()
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{
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local dev="$1" type flags=0
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# Make sure we have an actual device by that name
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f_struct "device_$dev" || return $FAILURE
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device_$dev get type type
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case "$type" in
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$DEVICE_TYPE_NETWORK)
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# Make sure that the media flags indicate that it is active
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device_$dev get flags flags
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[ $(( ${flags:-0} & $IF_ACTIVE )) -eq $IF_ACTIVE ]
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;;
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*)
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return $FAILURE
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esac
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}
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# f_device_rescan
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#
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# Rescan all devices, after closing previous set - convenience function.
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@ -581,6 +708,16 @@ f_device_rescan()
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f_device_get_all
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}
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# f_device_rescan_network
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#
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# Rescan all network devices, after closing previous set - for convenience.
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#
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f_device_rescan_network()
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{
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f_device_reset_network
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f_device_get_all_network
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}
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# f_device_find $name [$type [$var_to_set]]
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#
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# Find one or more registered devices by name, type, or both. Returns a space-
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