OpenGGSN is a Gateway GPRS Support Node (GGSN). It is used by mobile operators as the interface between the Internet and the rest of the mobile network infrastructure. The project also developed an SGSN emulator suitable GPRS core network testing.
Home Page: http://sourceforge.net/projects/ggsn/
License: GNU General Public License v2.0
Trying to start-up ggsn on a FreeBSD v11 box with
listen: 1.1.1.1
net 192.168.1.0/24
dynip: 192.168.1.0/24
results in errno 22 from tun.c
root@soak01:~ # ggsn -c /usr/local/etc/ggsn.conf -f -d
listen: (null)
conf: /usr/local/etc/ggsn.conf
fg: 1
debug: 1
qos: 0x0b921f
apn: internet
net: 192.168.0.0/24
pidfile: /var/run/ggsn.pid
statedir: /var/lib/ggsn/
timelimit: 0
cmdline_parser_configfile
listen: 1.1.1.1
conf: /usr/local/etc/ggsn.conf
fg: 1
debug: 1
qos: 0x0b921f
apn: internet
net: 192.168.1.0/24
dynip: 192.168.1.0/24
pidfile: /var/run/ggsn.pid
statedir: /var/lib/ggsn/
timelimit: 0
<000c> gtp.c:700 GTP: gtp_newgsn() started
<0001> tun.c:443 errno=22/Invalid argument ioctl(SIOCSIFADDR) failed
<0002> ggsn.c:518 Failed to set tun IP address
ggsn is able to create the tun0 interface
root@soak01:/usr/local/etc # ifconfig
vmx0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=60039b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,TSO6,RXCSUM_IPV6,TXCSUM_IPV6>
ether 00:50:56:b1:95:31
inet 10.5.8.201 netmask 0xffffff00 broadcast 10.5.8.255
inet6 fe80::250:56ff:feb1:9531%vmx0 prefixlen 64 scopeid 0x1
inet6 2001:1890:12f2:20::a05:8c9 prefixlen 64
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet autoselect
status: active
vmx1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=60039b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,TSO6,RXCSUM_IPV6,TXCSUM_IPV6>
ether 00:50:56:b1:55:8c
inet 1.1.1.1 netmask 0xffffff00 broadcast 1.1.1.255
inet6 fe80::250:56ff:feb1:558c%vmx1 prefixlen 64 scopeid 0x2
inet6 fdf6:4cfb:1::1 prefixlen 64
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
media: Ethernet autoselect
status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
inet 127.0.0.1 netmask 0xff000000
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
groups: lo
tun0: flags=8010<POINTOPOINT,MULTICAST> metric 0 mtu 1500
options=80000<LINKSTATE>
nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
groups: tun
This looks to be the code section where it is failing:
if (addr) { /* Set the interface address */
this->addr.s_addr = addr->s_addr;
memcpy(&((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr, addr,
sizeof(*addr));
if (ioctl(fd, SIOCSIFADDR, (void *) &ifr) < 0) {
if (errno != EEXIST) {
sys_err(LOG_ERR, __FILE__, __LINE__, errno,
"ioctl(SIOCSIFADDR) failed");
}
else {
sys_err(LOG_WARNING, __FILE__, __LINE__, errno,
"ioctl(SIOCSIFADDR): Address already exists");
}
close(fd);
return -1;
}
}
The server is running
FreeBSD soak01.eng.paloaltonetworks.local 11.0-RELEASE-p2 FreeBSD 11.0-RELEASE-p2 #0: Mon Oct 24 06:55:27 UTC 2016 [email protected]:/usr/obj/usr/src/sys/GENERIC amd64
and
openggsn-0.92
was install using the pkg command
It's possible to release the gtpdump application like a standalone app. I mean, i really don't want the whole ggsn project, I just need to be able to dump gtp package in my current deployment.
Hi,
I know that GTPv1 to GTPv0 interworking is not supported in 29.060. However, I was wondering what should happen when an MS creates a PDP Context through a GTPv1-capable SGSN and then moves to a GTPv0-capable one? If the SGSN Context Request procedure between the SGNSs succeeds(can this happen?), then how is the GGSN supposed to act on an Update PDP Context? This case also affects Secondary PDP contexts.
Generally, I am not sure how GSNs are supposed to act, because the GTPv1 PDP Contexts support more features than GTPv0 and the fallback scenarios are not documented, they seem to be rather best-practice.
The openggsn code handles both versions (from the GGSN side) without checking the current PDP Context version. Any information on how you think this should be handled?
I was looking inside gtp/gtpie.c and I found at line 280
that the length of a rab context ie is 7, but inside
the 29.060 specs it looks like that it should be 9,
so there should be "p += 1 + 9;" am I missing something?
case GTPIE_RAB_CONTEXT: /* TV GTPIE types with value length 7 /
if (j<GTPIE_SIZE) {
ie[j] = (union gtpie_member) p;
if (GTPIE_DEBUG) printf("GTPIE TV 7 found. Type %d\n", ie[j]->tv0.t);
p+= 1 + 7;
j++;
}
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