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89 lines
2.1 KiB
89 lines
2.1 KiB
#!/bin/sh
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#
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# Copyright (C) 2018 rosysong@rosinson.com
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#
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. /lib/nft-qos/core.sh
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# return average rate for dhcp leases
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qosdef_dynamic_rate() { # <bandwidth>
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local c=0 c6=0
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[ ! -e /tmp/dhcp.leases -a \
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! -e /var/dhcp6.leases ] && return
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[ -e /tmp/dhcp.leases ] && \
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c=$(wc -l < /tmp/dhcp.leases 2>/dev/null)
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[ -e /var/dhcp6.leases ] && \
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c6=$(wc -l < /var/dhcp6.leases 2>/dev/null)
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[ $c -eq 0 -a $c6 -eq 0 ] && \
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{ echo 12500; return; }
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echo $(($1 / ($c + $c6)))
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}
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qosdef_append_chain_dym() { # <hook> <name> <bandwidth>
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local cidr cidr6
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local operator rate
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local hook=$1 name=$2 bandwidth=$3
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config_get cidr default 'dynamic_cidr'
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config_get cidr6 default 'dynamic_cidr6'
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[ -z "$cidr" -a -z "$cidr6" ] && return
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case "$2" in
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download) operator=daddr;;
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upload) operator=saddr;;
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esac
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rate=$(qosdef_dynamic_rate $bandwidth)
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qosdef_appendx "\tchain $name {\n"
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qosdef_append_chain_def filter $hook 0 accept
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qosdef_append_rule_limit_whitelist $name
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[ -n "$cidr" ] && \
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qosdef_append_rule_ip_limit $cidr $operator kbytes $rate
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[ -n "$cidr6" ] && \
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qosdef_append_rule_ip_limit $cidr6 $operator kbytes $rate
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qosdef_appendx "\t}\n"
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}
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qosdef_flush_dynamic() {
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qosdef_flush_table "$NFT_QOS_INET_FAMILY" nft-qos-dynamic
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}
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# init dynamic qos
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qosdef_init_dynamic() {
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local dynamic_bw_up dynamic_bw_down limit_enable limit_type
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local hook_ul="prerouting" hook_dl="postrouting"
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uci_validate_section nft-qos default default \
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'limit_enable:bool:0' \
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'limit_type:maxlength(8)' \
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'dynamic_bw_up:uinteger:100' \
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'dynamic_bw_down:uinteger:100'
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[ $? -ne 0 ] && {
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logger -t nft-qos-dynamic "validation failed"
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return 1
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}
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[ $limit_enable -eq 0 -o \
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"$limit_type" = "static" ] && return 1
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# Transfer mbits/s to mbytes/s
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# e.g. 100,000 kbits == 12,500 kbytes
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dynamic_bw_up=$(($dynamic_bw_up * 1000 / 8))
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dynamic_bw_down=$(($dynamic_bw_down * 1000 / 8))
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[ -z "$NFT_QOS_HAS_BRIDGE" ] && {
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hook_ul="postrouting"
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hook_dl="prerouting"
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}
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qosdef_appendx "table $NFT_QOS_INET_FAMILY nft-qos-dynamic {\n"
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qosdef_append_chain_dym $hook_ul upload $dynamic_bw_up
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qosdef_append_chain_dym $hook_dl download $dynamic_bw_down
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qosdef_appendx "}\n"
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}
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