make network scripts more robust, prevent multiple instances of pppd and udhcpc for...
[openwrt/staging/mkresin.git] / package / ppp / files / ppp.sh
1 scan_ppp() {
2 config_get ifname "$1" ifname
3 pppdev="${pppdev:-0}"
4 config_set "$1" ifname "ppp$pppdev"
5 config_set "$1" unit "$pppdev"
6 }
7
8 start_pppd() {
9 local cfg="$1"; shift
10
11 # make sure only one pppd process is started
12 local pid="$(cat /var/run/ppp-${cfg}.pid 2>/dev/null)"
13 [ -d "/proc/$pid" ] && grep pppd "/proc/$pid/cmdline" 2>/dev/null >/dev/null && return 0
14
15 config_get device "$cfg" device
16 config_get unit "$cfg" unit
17 config_get username "$cfg" username
18 config_get password "$cfg" password
19 config_get keepalive "$cfg" keepalive
20 interval="${keepalive%%*[, ]}"
21 [ "$interval" != "$keepalive" ] || interval=5
22
23 config_get demand "$cfg" demand
24 [ -n "$demand" ] && echo "nameserver 1.1.1.1" > /tmp/resolv.conf
25 /usr/sbin/pppd "$@" \
26 ${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive##[, ]*}} \
27 ${demand:+precompiled-active-filter /etc/ppp/filter demand idle }${demand:-persist} \
28 usepeerdns \
29 defaultroute \
30 replacedefaultroute \
31 ${username:+user "$username" password "$password"} \
32 linkname "$cfg" \
33 ipparam "$cfg"
34 }