diff options
Diffstat (limited to 'usr.sbin/bsdconfig/networking/share/ipaddr.subr')
| -rw-r--r-- | usr.sbin/bsdconfig/networking/share/ipaddr.subr | 225 |
1 files changed, 215 insertions, 10 deletions
diff --git a/usr.sbin/bsdconfig/networking/share/ipaddr.subr b/usr.sbin/bsdconfig/networking/share/ipaddr.subr index 7e858dc..65c2b98 100644 --- a/usr.sbin/bsdconfig/networking/share/ipaddr.subr +++ b/usr.sbin/bsdconfig/networking/share/ipaddr.subr @@ -60,7 +60,7 @@ f_ifconfig_inet() ' } -# f_dialog_validate_ipaddr $ipaddr +# f_validate_ipaddr $ipaddr # # Returns zero if the given argument (an IP address) is of the proper format. # @@ -73,10 +73,7 @@ f_ifconfig_inet() # maximum of 255 (or 2^8, being an octet comprised of 8 bits). # 4 The IP address has either too few or too many octets. # -# If the IP address is determined to be invalid, the appropriate error will be -# displayed using the above dialog_msgbox function. -# -f_dialog_validate_ipaddr() +f_validate_ipaddr() { local ip="$1" @@ -106,12 +103,19 @@ f_dialog_validate_ipaddr() [ $noctets -eq 4 ] || exit 4 ) +} +# f_dialog_iperror $error $ipaddr +# +# Display a msgbox with the appropriate error message for an error returned by +# the f_validate_ipaddr function above. +# +f_dialog_iperror() +{ + local error="$1" ip="$2" - # - # Produce an appropriate error message if necessary. - # - local retval=$? - case $retval in + [ ${error:-0} -ne 0 ] || return $SUCCESS + + case "$error" in 1) f_dialog_msgbox "$( printf \ "$msg_ipv4_addr_octet_contains_invalid_chars" "$ip" )";; 2) f_dialog_msgbox "$( printf \ @@ -121,6 +125,207 @@ f_dialog_validate_ipaddr() 4) f_dialog_msgbox "$( printf \ "$msg_ipv4_addr_octet_missing_or_extra" "$ip" )";; esac +} + +# f_dialog_validate_ipaddr $ipaddr +# +# Returns zero if the given argument (an IP address) is of the proper format. +# +# If the IP address is determined to be invalid, the appropriate error will be +# displayed using the f_dialog_iperror function above. +# +f_dialog_validate_ipaddr() +{ + local ip="$1" + + f_validate_ipaddr "$ip" + local retval=$? + + # Produce an appropriate error message if necessary. + [ $retval -eq $SUCCESS ] || f_dialog_iperror $retval "$ip" + + return $retval +} + +# f_validate_ipaddr6 $ipv6_addr +# +# Returns zero if the given argument (an IPv6 address) is of the proper format. +# +# The return status for invalid IP address is one of: +# 1 One or more individual segments within the IP address +# (separated by colons) contains one or more invalid characters. +# Segments must contain only combinations of the characters 0-9, +# A-F, or a-f. +# 2 Too many/incorrect null segments. A single null segment is +# allowed within the IP address (separated by colons) but not +# allowed at the beginning or end (unless a double-null segment; +# i.e., "::*" or "*::"). +# 3 One or more individual segments within the IP address +# (separated by colons) exceeds the length of 4 hex-digits. +# 4 The IP address entered has either too few (less than 3), too +# many (more than 8), or not enough segments, separated by +# colons. +# 5* The IPv4 address at the end of the IPv6 address is invalid. +# * When there is an error with the dotted-quad IPv4 address at the +# end of the IPv6 address, the return value of 5 is OR'd with a +# bit-shifted (<< 4) return of f_validate_ipaddr. +# +f_validate_ipaddr6() +{ + local ip="$1" + + ( # Operate within a sub-shell to protect the parent environment + + IFS=":" # Split on `colon' + set -- $ip: + + # Return error if too many or too few segments + # Using 9 as max in case of leading or trailing null spanner + [ $# -gt 9 -o $# -lt 3 ] && exit 4 + + h="[0-9A-Fa-f]" + nulls=0 + nsegments=$# + contains_ipv4_segment= + + while [ $# -gt 0 ]; do + + segment="${1%:}" + shift + + # + # Return error if this segment makes one null too-many. + # A single null segment is allowed anywhere in the + # middle as well as double null segments are allowed at + # the beginning or end (but not both). + # + if [ ! "$segment" ]; then + nulls=$(( $nulls + 1 )) + if [ $nulls -eq 3 ]; then + # Only valid syntax for 3 nulls is `::' + [ "$ip" = "::" ] || exit 2 + elif [ $nulls -eq 2 ]; then + # Only valid if begins/ends with `::' + case "$ip" in + ::*|*::) : fall thru ;; + *) exit 2 + esac + fi + continue + fi + + # + # Return error if not a valid hexadecimal short + # + case "$segment" in + $h|$h$h|$h$h$h|$h$h$h$h) + : valid segment of 1-4 hexadecimal digits + ;; + *[!0-9A-Fa-f]*) + # Segment contains at least one invalid char + + # Return error immediately if not last segment + [ $# -eq 0 ] || exit 1 + + # Otherwise, check for legacy IPv4 notation + case "$segment" in + *[!0-9.]*) + # Segment contains at least one invalid + # character even for an IPv4 address + exit 1 + esac + + # Return error if not enough segments + if [ $nulls -eq 0 ]; then + [ $nsegments -eq 7 ] || exit 4 + fi + + contains_ipv4_segment=1 + + # Validate the IPv4 address + f_validate_ipaddr "$segment" || + exit $(( 5 | $? << 4 )) + ;; + *) + # Segment characters are all valid but too many + exit 3 + esac + + done + + if [ $nulls -eq 1 ]; then + # Single null segment cannot be at beginning/end + case "$ip" in + :*|*:) exit 2 + esac + fi + + # + # A legacy IPv4 address can span the last two 16-bit segments, + # reducing the amount of maximum allowable segments by-one. + # + maxsegments=8 + if [ "$contains_ipv4_segment" ]; then + maxsegments=7 + fi + + case $nulls in + # Return error if missing segments with no null spanner + 0) [ $nsegments -eq $maxsegments ] || exit 4 ;; + # Return error if null spanner with too many segments + 1) [ $nsegments -le $maxsegments ] || exit 4 ;; + # Return error if leading/trailing `::' with too many segments + 2) [ $nsegments -le $(( $maxsegments + 1 )) ] || exit 4 ;; + esac + + exit $SUCCESS + ) +} + +# f_dialog_ip6error $error $ipv6_addr +# +# Display a msgbox with the appropriate error message for an error returned by +# the f_validate_ipaddr6 function above. +# +f_dialog_ip6error() +{ + local error="$1" ip="$2" + + [ ${error:-0} -ne 0 ] || return $SUCCESS + + case "$error" in + 1) f_dialog_msgbox "$( printf \ + "$msg_ipv6_addr_segment_contains_invalid_chars" "$ip" )";; + 2) f_dialog_msgbox "$( printf \ + "$msg_ipv6_addr_too_many_null_segments" "$ip" )";; + 3) f_dialog_msgbox "$( printf \ + "$msg_ipv6_addr_segment_contains_too_many_chars" "$ip" )";; + 4) f_dialog_msgbox "$( printf \ + "$msg_ipv6_addr_too_few_or_extra_segments" "$ip" )";; + *) + if [ $(( $error & 0xF )) -eq 5 ]; then + # IPv4 at the end of IPv6 address is invalid + f_dialog_iperror $(( $error >> 4 )) "$ip" + fi + esac +} + +# f_dialog_validate_ipaddr6 $ipv6_addr +# +# Returns zero if the given argument (an IPv6 address) is of the proper format. +# +# If the IP address is determined to be invalid, the appropriate error will be +# displayed using the f_dialog_ip6error function above. +# +f_dialog_validate_ipaddr6() +{ + local ip="$1" + + f_validate_ipaddr6 "$ip" + local retval=$? + + # Produce an appropriate error message if necessary. + [ $retval -eq $SUCCESS ] || f_dialog_ip6error $retval "$ip" return $retval } |
