+++ /dev/null
-/***********************************************************************
-*
-* plugin.c
-*
-* pppd plugin for kernel-mode PPPoE on Linux
-*
-* Copyright (C) 2001 by Roaring Penguin Software Inc., Michal Ostrowski
-* and Jamal Hadi Salim.
-*
-* Much code and many ideas derived from pppoe plugin by Michal
-* Ostrowski and Jamal Hadi Salim, which carries this copyright:
-*
-* Copyright 2000 Michal Ostrowski <mostrows@styx.uwaterloo.ca>,
-* Jamal Hadi Salim <hadi@cyberus.ca>
-* Borrows heavily from the PPPoATM plugin by Mitchell Blank Jr.,
-* which is based in part on work from Jens Axboe and Paul Mackerras.
-*
-* This program is free software; you can redistribute it and/or
-* modify it under the terms of the GNU General Public License
-* as published by the Free Software Foundation; either version
-* 2 of the License, or (at your option) any later version.
-***********************************************************************/
-
-static char const RCSID[] =
-"$Id: plugin.c,v 1.13 2005/07/09 09:12:48 paulus Exp $";
-
-#define _GNU_SOURCE 1
-#include "pppoe.h"
-
-#include "pppd/pppd.h"
-#include "pppd/fsm.h"
-#include "pppd/lcp.h"
-#include "pppd/ipcp.h"
-#include "pppd/ccp.h"
-#include "pppd/pathnames.h"
-
-#include <linux/types.h>
-#include <syslog.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <string.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <net/ethernet.h>
-#include <net/if_arp.h>
-#include "ppp_defs.h"
-#include "if_ppp.h"
-#include "if_pppox.h"
-
-#define _PATH_ETHOPT _ROOT_PATH "/etc/ppp/options."
-
-char pppd_version[] = VERSION;
-
-/* From sys-linux.c in pppd -- MUST FIX THIS! */
-extern int new_style_driver;
-
-char *pppd_pppoe_service = NULL;
-static char *acName = NULL;
-static char *existingSession = NULL;
-static int printACNames = 0;
-
-static int PPPoEDevnameHook(char *cmd, char **argv, int doit);
-static option_t Options[] = {
- { "device name", o_wild, (void *) &PPPoEDevnameHook,
- "PPPoE device name",
- OPT_DEVNAM | OPT_PRIVFIX | OPT_NOARG | OPT_A2STRVAL | OPT_STATIC,
- devnam},
- { "rp_pppoe_service", o_string, &pppd_pppoe_service,
- "Desired PPPoE service name" },
- { "rp_pppoe_ac", o_string, &acName,
- "Desired PPPoE access concentrator name" },
- { "rp_pppoe_sess", o_string, &existingSession,
- "Attach to existing session (sessid:macaddr)" },
- { "rp_pppoe_verbose", o_int, &printACNames,
- "Be verbose about discovered access concentrators"},
- { NULL }
-};
-
-static PPPoEConnection *conn = NULL;
-
-/**********************************************************************
- * %FUNCTION: PPPOEInitDevice
- * %ARGUMENTS:
- * None
- * %RETURNS:
- *
- * %DESCRIPTION:
- * Initializes PPPoE device.
- ***********************************************************************/
-static int
-PPPOEInitDevice(void)
-{
- conn = malloc(sizeof(PPPoEConnection));
- if (!conn) {
- fatal("Could not allocate memory for PPPoE session");
- }
- memset(conn, 0, sizeof(PPPoEConnection));
- if (acName) {
- SET_STRING(conn->acName, acName);
- }
- if (pppd_pppoe_service) {
- SET_STRING(conn->serviceName, pppd_pppoe_service);
- }
- SET_STRING(conn->ifName, devnam);
- conn->discoverySocket = -1;
- conn->sessionSocket = -1;
- conn->useHostUniq = 1;
- conn->printACNames = printACNames;
- return 1;
-}
-
-/**********************************************************************
- * %FUNCTION: PPPOEConnectDevice
- * %ARGUMENTS:
- * None
- * %RETURNS:
- * Non-negative if all goes well; -1 otherwise
- * %DESCRIPTION:
- * Connects PPPoE device.
- ***********************************************************************/
-static int
-PPPOEConnectDevice(void)
-{
- struct sockaddr_pppox sp;
-
- strlcpy(ppp_devnam, devnam, sizeof(ppp_devnam));
- if (existingSession) {
- unsigned int mac[ETH_ALEN];
- int i, ses;
- if (sscanf(existingSession, "%d:%x:%x:%x:%x:%x:%x",
- &ses, &mac[0], &mac[1], &mac[2],
- &mac[3], &mac[4], &mac[5]) != 7) {
- fatal("Illegal value for rp_pppoe_sess option");
- }
- conn->session = htons(ses);
- for (i=0; i<ETH_ALEN; i++) {
- conn->peerEth[i] = (unsigned char) mac[i];
- }
- } else {
- discovery(conn);
- if (conn->discoveryState != STATE_SESSION) {
- error("Unable to complete PPPoE Discovery");
- return -1;
- }
- }
-
- /* Set PPPoE session-number for further consumption */
- ppp_session_number = ntohs(conn->session);
-
- /* Make the session socket */
- conn->sessionSocket = socket(AF_PPPOX, SOCK_STREAM, PX_PROTO_OE);
- if (conn->sessionSocket < 0) {
- fatal("Failed to create PPPoE socket: %m");
- }
- sp.sa_family = AF_PPPOX;
- sp.sa_protocol = PX_PROTO_OE;
- sp.sa_addr.pppoe.sid = conn->session;
- memcpy(sp.sa_addr.pppoe.dev, conn->ifName, IFNAMSIZ);
- memcpy(sp.sa_addr.pppoe.remote, conn->peerEth, ETH_ALEN);
-
- /* Set remote_number for ServPoET */
- sprintf(remote_number, "%02X:%02X:%02X:%02X:%02X:%02X",
- (unsigned) conn->peerEth[0],
- (unsigned) conn->peerEth[1],
- (unsigned) conn->peerEth[2],
- (unsigned) conn->peerEth[3],
- (unsigned) conn->peerEth[4],
- (unsigned) conn->peerEth[5]);
-
- if (connect(conn->sessionSocket, (struct sockaddr *) &sp,
- sizeof(struct sockaddr_pppox)) < 0) {
- fatal("Failed to connect PPPoE socket: %d %m", errno);
- return -1;
- }
-
- return conn->sessionSocket;
-}
-
-static void
-PPPOERecvConfig(int mru,
- u_int32_t asyncmap,
- int pcomp,
- int accomp)
-{
- if (mru > MAX_PPPOE_MTU)
- warn("Couldn't increase MRU to %d", mru);
-}
-
-/**********************************************************************
- * %FUNCTION: PPPOEDisconnectDevice
- * %ARGUMENTS:
- * None
- * %RETURNS:
- * Nothing
- * %DESCRIPTION:
- * Disconnects PPPoE device
- ***********************************************************************/
-static void
-PPPOEDisconnectDevice(void)
-{
- struct sockaddr_pppox sp;
-
- sp.sa_family = AF_PPPOX;
- sp.sa_protocol = PX_PROTO_OE;
- sp.sa_addr.pppoe.sid = 0;
- memcpy(sp.sa_addr.pppoe.dev, conn->ifName, IFNAMSIZ);
- memcpy(sp.sa_addr.pppoe.remote, conn->peerEth, ETH_ALEN);
- if (connect(conn->sessionSocket, (struct sockaddr *) &sp,
- sizeof(struct sockaddr_pppox)) < 0) {
- fatal("Failed to disconnect PPPoE socket: %d %m", errno);
- return;
- }
- close(conn->sessionSocket);
- /* don't send PADT?? */
- close(conn->discoverySocket);
-}
-
-static void
-PPPOEDeviceOptions(void)
-{
- char buf[256];
- snprintf(buf, 256, _PATH_ETHOPT "%s",devnam);
- if(!options_from_file(buf, 0, 0, 1))
- exit(EXIT_OPTION_ERROR);
-
-}
-
-struct channel pppoe_channel;
-
-/**********************************************************************
- * %FUNCTION: PPPoEDevnameHook
- * %ARGUMENTS:
- * cmd -- the command (actually, the device name
- * argv -- argument vector
- * doit -- if non-zero, set device name. Otherwise, just check if possible
- * %RETURNS:
- * 1 if we will handle this device; 0 otherwise.
- * %DESCRIPTION:
- * Checks if name is a valid interface name; if so, returns 1. Also
- * sets up devnam (string representation of device).
- ***********************************************************************/
-static int
-PPPoEDevnameHook(char *cmd, char **argv, int doit)
-{
- int r = 1;
- int fd;
- struct ifreq ifr;
-
- /* Only do it if name is "ethXXX", "nasXXX", "tapXXX" or "nic-XXXX.
- In latter case strip off the "nic-" */
- /* Thanks to Russ Couturier for this fix */
- if (strlen(cmd) > 4 && !strncmp(cmd, "nic-", 4)) {
- /* Strip off "nic-" */
- cmd += 4;
- } else if (strlen(cmd) < 4
- || (strncmp(cmd, "eth", 3) && strncmp(cmd, "nas", 3)
- && strncmp(cmd, "tap", 3) && strncmp(cmd, "br", 2))) {
- return 0;
- }
-
- /* Open a socket */
- if ((fd = socket(PF_PACKET, SOCK_RAW, 0)) < 0) {
- r = 0;
- }
-
- /* Try getting interface index */
- if (r) {
- strncpy(ifr.ifr_name, cmd, sizeof(ifr.ifr_name));
- if (ioctl(fd, SIOCGIFINDEX, &ifr) < 0) {
- r = 0;
- } else {
- if (ioctl(fd, SIOCGIFHWADDR, &ifr) < 0) {
- r = 0;
- } else {
- if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
- error("Interface %s not Ethernet", cmd);
- r=0;
- }
- }
- }
- }
-
- /* Close socket */
- close(fd);
- if (r) {
- strncpy(devnam, cmd, sizeof(devnam));
- if (the_channel != &pppoe_channel) {
-
- the_channel = &pppoe_channel;
- modem = 0;
-
- lcp_allowoptions[0].neg_accompression = 0;
- lcp_wantoptions[0].neg_accompression = 0;
-
- lcp_allowoptions[0].neg_asyncmap = 0;
- lcp_wantoptions[0].neg_asyncmap = 0;
-
- lcp_allowoptions[0].neg_pcompression = 0;
- lcp_wantoptions[0].neg_pcompression = 0;
-
- lcp_allowoptions[0].mru = MAX_PPPOE_MTU;
- lcp_wantoptions[0].mru = MAX_PPPOE_MTU;
-
- ccp_allowoptions[0].deflate = 0 ;
- ccp_wantoptions[0].deflate = 0 ;
-
- ipcp_allowoptions[0].neg_vj=0;
- ipcp_wantoptions[0].neg_vj=0;
-
- ccp_allowoptions[0].bsd_compress = 0;
- ccp_wantoptions[0].bsd_compress = 0;
-
- PPPOEInitDevice();
- }
- return 1;
- }
-
- return r;
-}
-
-/**********************************************************************
- * %FUNCTION: plugin_init
- * %ARGUMENTS:
- * None
- * %RETURNS:
- * Nothing
- * %DESCRIPTION:
- * Initializes hooks for pppd plugin
- ***********************************************************************/
-void
-plugin_init(void)
-{
- if (!ppp_available() && !new_style_driver) {
- fatal("Linux kernel does not support PPPoE -- are you running 2.4.x?");
- }
-
- add_options(Options);
-
- info("RP-PPPoE plugin version %s compiled against pppd %s",
- RP_VERSION, VERSION);
-}
-
-/**********************************************************************
-*%FUNCTION: fatalSys
-*%ARGUMENTS:
-* str -- error message
-*%RETURNS:
-* Nothing
-*%DESCRIPTION:
-* Prints a message plus the errno value to stderr and syslog and exits.
-***********************************************************************/
-void
-fatalSys(char const *str)
-{
- char buf[1024];
- int i = errno;
- sprintf(buf, "%.256s: %.256s", str, strerror(i));
- printErr(buf);
- sprintf(buf, "RP-PPPoE: %.256s: %.256s", str, strerror(i));
- sendPADT(conn, buf);
- exit(1);
-}
-
-/**********************************************************************
-*%FUNCTION: rp_fatal
-*%ARGUMENTS:
-* str -- error message
-*%RETURNS:
-* Nothing
-*%DESCRIPTION:
-* Prints a message to stderr and syslog and exits.
-***********************************************************************/
-void
-rp_fatal(char const *str)
-{
- char buf[1024];
- printErr(str);
- sprintf(buf, "RP-PPPoE: %.256s", str);
- sendPADT(conn, buf);
- exit(1);
-}
-/**********************************************************************
-*%FUNCTION: sysErr
-*%ARGUMENTS:
-* str -- error message
-*%RETURNS:
-* Nothing
-*%DESCRIPTION:
-* Prints a message plus the errno value to syslog.
-***********************************************************************/
-void
-sysErr(char const *str)
-{
- rp_fatal(str);
-}
-
-
-struct channel pppoe_channel = {
- options: Options,
- process_extra_options: &PPPOEDeviceOptions,
- check_options: NULL,
- connect: &PPPOEConnectDevice,
- disconnect: &PPPOEDisconnectDevice,
- establish_ppp: &generic_establish_ppp,
- disestablish_ppp: &generic_disestablish_ppp,
- send_config: NULL,
- recv_config: &PPPOERecvConfig,
- close: NULL,
- cleanup: NULL
-};
projects / ppp.git / blobdiff