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Diffstat (limited to 'package/base-files/files/lib/config/validate_spec.awk')
| -rw-r--r-- | package/base-files/files/lib/config/validate_spec.awk | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/package/base-files/files/lib/config/validate_spec.awk b/package/base-files/files/lib/config/validate_spec.awk new file mode 100644 index 0000000000..0816c08290 --- /dev/null +++ b/package/base-files/files/lib/config/validate_spec.awk @@ -0,0 +1,171 @@ +# AWK file for validating uci specification files +# +# Copyright (C) 2006 by Fokus Fraunhofer <carsten.tittel@fokus.fraunhofer.de> +# Copyright (C) 2007 by Felix Fietkau <nbd@openwrt.org> +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +# +# +# general: unfortunately, the development was done using gawk providing +# a different match() functions than e.g. mawk on debian systems +# - therefore, the script was changed to run on most awk's +# - even things like [:space:] are not used +# +# - script parses the config section definition contained in one +# specification file +# global variables: +# * section - contains the current config section name +# * var - contains the name of the current config option +# * type - contains the type of the current config option +# * required - contains the requirements of the current config option +# * optional - contains the optional scope of the current config option +# * vars[] - array, contains the name of all config options valid within +# a certain config section, format: csv +# +# XXX todo: more than one config option with the same in different section +# will clash for the following tables +# * types[] - contains the type of a config option +# * reqs[] - contains the requirements of a config option +# * opts[] - contains the optional scope of a config option +# + +# - check requirement validates, if the config option is required in +# the config section type and if so, if it is defined +# - the functions exits with error in case of non-conforming +# behaviour +# XXX todo: use return instead of exit +# +function check_requirements(vsec,var) { + # check, if config option is required in all cases + if (reqs[vsec "_" var] == 1) { + # option is always required, is it defined? + if (!length(ENVIRON["CONFIG_" vsec "_" var])) { + print STDERR "Error: missing config option " var " in " vsec + exit 1 + } + + # check, if config option is required only when other options + # have certain values + } else if (length(reqs[vsec "_" var])) { + # - check all requirements, e.g. proto=static,proto=pptp + # - note, that the required flag is tiggered if at least one + # of the conditions is met + split(reqs[vsec "_" var],arr,","); + for (idx in arr) { + # parse the condition space tolerant + if (!match(arr[idx],"^[ \t\n]*[^ \t\n=]+"\ + "[ \t\n]*=.+")) { + print STDERR "Error: invalid requirement "\ + "in spec file for " var " : " arr[idx] + exit 1 + } + # get the name of the variable + match(arr[idx],"[^ \t\n=]+"); + name=substr(arr[idx],RSTART,RLENGTH) + mrest=substr(arr[idx],RSTART+RLENGTH) + # get the spaces + match(mrest,"[ \t\n]*=[ \t\n]*") + val=substr(mrest,RSTART+RLENGTH) + # check the condition + if (ENVIRON["CONFIG_" vsec "_" name] == val) { + # condition is met, check requirement + if (!length(ENVIRON["CONFIG_" vsec "_" var])) { + print STDERR "Error: missing config " \ + "option " var " in " vsec + exit 1 + } + } + } + } +} + +# is_valid just returns true(1)/false(0) if the +# given value is conform with the type definition +# NOTE: this function needs the type validating function from +# validate_config.awk +# +function is_valid(type,value) { + + # the enum type contains a definition of all allowed values as csv + # e.g. enum,alpha,beta,gamma + if (type ~ "enum" ) { + split(type,tarr,",") + for (num in tarr) { + if (num > 0) { + gsub("^[ \t\n]*","",tarr[num]); + gsub("[ \t\n]*$","",tarr[num]); + if (tarr[num] == value) { + return 1 + } + } + } + return 0; + } + + # all other types are checked as defined in the former validate.awk + if (type ~ "int") return is_int(value) + if (type ~ "ip" ) return is_ip(value) + if (type ~ "netmask" ) return is_netmask(value) + if (type ~ "string" ) return is_string(value) + if (type ~ "wep" ) return is_wep(value) + if (type ~ "hostname" ) return is_hostname(value) + if (type ~ "mac" ) return is_mac(value) + if (type ~ "port" ) return is_port(value) + if (type ~ "ports" ) return is_ports(value) + if (type ~ "wpapsk" ) return is_wpapsk(value) +} + +# validate_config compares the specification as parsed from the spec file +# with the environment variables +# CONFIG_SECTION contains the relevant config section name, e.g. wan +# CONFIG_<section>_TYPE contains the type of the config, e.g. interface +# CONFIG_<section>_<var> contains the value of the config option <var> +# +function validate_config() { + # get the config section name + vname=ENVIRON["CONFIG_SECTION"] + if (!length(vname)) { + print STDERR "Error: no current configuration" + exit 1 + } + # get the config section type + vsec=ENVIRON["CONFIG_" vname "_TYPE"] + if (!length(vsec)) { + print STDERR "Error: section " vsec " not found" + exit 1 + } + + # loop through all config options specified for this section type + split(vars[vsec],options,",") + for (oidx in options) { + # first, look for all required attributes + var=options[oidx] + check_requirements(vname,var) + + # next look at each option and validate it + val=ENVIRON["CONFIG_" vname "_" var] + if (length(val)) { + if (!is_valid(types[vsec "_" var],val)) { + print "Error: type validation error for '" var "' in section '" vname "'" + exit 1 + } + } + } +} + + +END { + validate_config() +} |