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[SCTP] Support setting local address (#3344)

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Added support for binding to local IP addresses in ogs_sctp_client and
ogs_sctp_server, and correct SGsAP configuration

Implemented the ability to bind to one or multiple local IP addresses using
`sctp_bindx()` in both the `ogs_sctp_client()` and `ogs_sctp_server()` APIs.

Users can now specify local addresses in the configuration files under the new
`local_addresses` field, reducing unnecessary complexity and signaling caused
by binding to `ANY_ADDR`.

This update addresses issue https://osmocom.org/issues/6509 by ensuring
correct operation in multi-interface and complex networking setups.

Additionally, corrected the `sgsap` configuration by changing it
from `server` to `client`, and added support for specifying `local_addresses`
for local binding as follows:

```
sgsap:
  client:
    - address: msc.open5gs.org # SCTP server address configured on the MSC/VL
      local_address: 127.0.0.2 # SCTP local IP addresses to be bound in the M
```
This commit is contained in:
Sukchan Lee 2024-12-23 21:08:13 +09:00
parent b44d159c7b
commit b0bfd35c63
10 changed files with 427 additions and 153 deletions
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2
configs/csfb.yaml.in
View file

@ -59,7 +59,7 @@ mme:
smf:
- address: 127.0.0.4
sgsap:
server:
client:
- address: 127.0.0.2
map:
tai:

15
configs/open5gs/mme.yaml.in
View file

@ -164,8 +164,9 @@ mme:
################################################################################
# o MSC/VLR
# sgsap:
# server:
# - address: 127.0.0.2
# client:
# - address: msc.open5gs.org # SCTP server address configured on the MSC/VLR
# local_address: 127.0.0.2 # SCTP local IP addresses to be bound in the MME
# map:
# tai:
# plmn_id:
@ -188,7 +189,15 @@ mme:
# mcc: 002
# mnc: 02
# lac: 43692
# - address: msc.open5gs.org
# - address: # SCTP server address configured on the MSC/VLR
# - 127.0.0.88
# - 10.0.0.88
# - 172.16.0.88
# - 2001:db8:babe::88
# local_address: # SCTP local IP addresses to be bound in the MME
# - 127.0.0.2
# - 192.168.1.4
# - 2001:db8:cafe::2
# map:
# tai:
# plmn_id: