From 711ff0ba94d29f059dde90f3c24db307e0d92d4c Mon Sep 17 00:00:00 2001 From: Udaya Shankara KS Date: Thu, 11 Feb 2016 21:42:29 +0530 Subject: zebra: Enable fpm module to connect to remote fpm server FPM aims to provide cross platform mechanism to support the scenario where the router has forwarding path distinct fromt the kernel.Commonly Hardware based fast path.Hence it is non-configurable paramter.This limits us to use funcationality to update FIB information to remote hosts, like SDN controller. This implementation provides the CLI to configure remote hosts and port information of remote fpm controller.Otherwise default fpm server will be localhost and default fpm port will be well know port 2620. * zebra_fpm.c: added fpm_server paramter to zfpm_global_t handler. Implemented CLI for configuring the fpm server and no fpm command to revert back to default configuration. * zserv.c: Install zebra node to write fpm configuration info on console/config file. Further documentation supplied: ------------------------------- ZEBRA : CLI CONFIGURATION FOR FPM MODULE ======================================================== 1. INTRODUCTION ================================ 1.1 scope This memo discusses the configuration option for zebra to update FIB information to local and remote modules. This will also helps to address the issue associated with CORD project. https://jira.onosproject.org/browse/CORD-411 2. REFERENCE ================================ Quagga version 99.24+ ( main branch committed on 29-sep-2015) 3. PROBLEM DESCRIPTION ================================ Once FPM is enabled, Quagga periodically tries to initiate fpm connection to localhost:2620. These values are non configurable in existing implementation. There is no CLI available to configure "host:port". hence limits us to use it for hardware based fast path modules only. 4. PROPOSED CHANGES ================================ Following changes are done to the quagga code a) Added new CLI to configure "host address : port". The CLI format $ fpm connection ip port and no fpm command to revert back to default $ no fpm connection ip port b) Allowed values are ipv4 address and tcp port range <1-65535> c) FPM initialization code has been enhanced to pick the "host address : port" values from zebra.conf. if not found then default values as localhost:2620 will be used. and updated the information on to config file on write config command 5. FILES MODIFIED ================================ 1) fpm/fpm.h : a) Added MACRO to represent network order loopback ip 2) zebra/zebra_fpm.h : a) introduced fpm_server variable in zfpm_glob_t handler to hold the remote fpm server address b) Hooked 'fpm_remote_ip_cmd' and 'no_fpm_remote_ip_cmd' at CONFIG node to configure remote fpm detail and to revert back to default respectively 3) zebra/zserv.c : a) Hooked 'config_write_fpm' callback function, at ZEBRA_NODE to display the fpm connection details on console on entering command $ show running_config and to write to configuration file on entering command $ write config 6. TESTING DETAILS ================================ 6.1. default behavior In default configuration FPM will attempt to connect to localhost:2620 6.2. update fpm info a) Using CLI command user can configure fpm host:port details and can be able to write to config file(zebra.conf) using write config command. this parameters has no dependency/impact on other parameters of config file b) show running-config/write config will display the fpm information if configured. and will not display any information related to fpm for default configuration c) these configured information will be stored to config file. only on write config command. 6.3 loading from config file a) zebra attempts to connect to fpm server if fpm parameter found in config file.else connects to default parameters. b) if fpm connection drops, fpm will periodically attempts to connect to remote server. c) if fpm connections already established. then newly configured fpm parameters will not disconnect the existing connection. new connection to the different fpm server will happen only after existing connection closes by either of the end. fix fpm prototype --- fpm/fpm.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'fpm') diff --git a/fpm/fpm.h b/fpm/fpm.h index 96f05f486..9a1dbf2b0 100644 --- a/fpm/fpm.h +++ b/fpm/fpm.h @@ -87,6 +87,14 @@ * table(s) when it reconnects. */ +/* + * Local host as a default server for fpm connection + */ +#define FPM_DEFAULT_IP (htonl (INADDR_LOOPBACK)) + +/* + * default port for fpm connections + */ #define FPM_DEFAULT_PORT 2620 /* @@ -270,4 +278,10 @@ fpm_msg_ok (const fpm_msg_hdr_t *hdr, size_t len) return 1; } +// tcp maximum range +#define TCP_MAX_PORT 65535 + +// tcp minimum range +#define TCP_MIN_PORT 1 + #endif /* _FPM_H */ -- cgit v1.2.3