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262600f5df
ppp/pppd/sys-aix4.c
Paul Mackerras f69a54671e add log level arg for log_packet
1997-04-30 05:59:38 +00:00

1317 lines
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/*
* sys-aix4.c - System-dependent procedures for setting up
* PPP interfaces on AIX systems which use the STREAMS ppp interface.
*
* Copyright (c) 1989 Carnegie Mellon University.
* Copyright (c) 1995 The Australian National University.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by Carnegie Mellon University and The Australian National University.
* The names of the Universities may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char rcsid[] = "$Id: sys-aix4.c,v 1.12 1997/04/30 05:57:19 paulus Exp $";
#endif
/*
* TODO:
*/
#include <stdio.h>
/*
#include <stdlib.h>
*/
#include <errno.h>
#include <syslog.h>
#include <termios.h>
#include <sys/termiox.h>
#include <fcntl.h>
#include <string.h>
#include <time.h>
#include <utmp.h>
#include <poll.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/stream.h>
#include <sys/stropts.h>
#include <net/if.h>
#include <net/ppp_defs.h>
#include <net/ppp_str.h>
#include <net/route.h>
#include <net/if_arp.h>
#include <netinet/in.h>
#include "pppd.h"
#ifndef ifr_mtu
#define ifr_mtu ifr_metric
#endif
#define MAXMODULES 10 /* max number of module names to save */
static struct modlist {
char modname[FMNAMESZ+1];
} str_modules[MAXMODULES];
static int str_module_count = 0;
static int pushed_ppp;
static int closed_stdio;
static int restore_term; /* 1 => we've munged the terminal */
static struct termios inittermios; /* Initial TTY termios */
static int initfdflags = -1; /* Initial file descriptor flags for fd */
static int sockfd; /* socket for doing interface ioctls */
static int if_is_up; /* Interface has been marked up */
static u_int32_t ifaddrs[2]; /* local and remote addresses */
static u_int32_t default_route_gateway; /* Gateway for default route added */
static u_int32_t proxy_arp_addr; /* Addr for proxy arp entry added */
/* Prototypes for procedures local to this file. */
static int translate_speed __P((int));
static int baud_rate_of __P((int));
static int get_ether_addr __P((u_int32_t, struct sockaddr *));
/*
* sys_init - System-dependent initialization.
*/
void
sys_init()
{
/* Get an internet socket for doing socket ioctl's on. */
if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
syslog(LOG_ERR, "Couldn't create IP socket: %m");
die(1);
}
}
/*
* sys_cleanup - restore any system state we modified before exiting:
* mark the interface down, delete default route and/or proxy arp entry.
* This should call die() because it's called from die().
*/
void
sys_cleanup()
{
struct ifreq ifr;
if (if_is_up) {
strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) >= 0
&& ((ifr.ifr_flags & IFF_UP) != 0)) {
ifr.ifr_flags &= ~IFF_UP;
ioctl(sockfd, SIOCSIFFLAGS, &ifr);
}
}
if (ifaddrs[0])
cifaddr(0, ifaddrs[0], ifaddrs[1]);
if (default_route_gateway)
cifdefaultroute(0, 0, default_route_gateway);
if (proxy_arp_addr)
cifproxyarp(0, proxy_arp_addr);
}
/*
* daemon - Detach us from the terminal session.
*/
int
daemon(nochdir, noclose)
int nochdir, noclose;
{
int pid;
if ((pid = fork()) < 0)
return -1;
if (pid != 0)
exit(0); /* parent dies */
setsid();
if (!nochdir)
chdir("/");
if (!noclose) {
fclose(stdin); /* don't need stdin, stdout, stderr */
fclose(stdout);
fclose(stderr);
}
return 0;
}
/*
* ppp_available - check if this kernel supports PPP.
*/
int
ppp_available()
{
int fd, ret;
fd = open("/dev/tty", O_RDONLY, 0);
if (fd < 0)
return 1; /* can't find out - assume we have ppp */
ret = ioctl(fd, I_FIND, "pppasync") >= 0;
close(fd);
return ret;
}
/*
* establish_ppp - Turn the serial port into a ppp interface.
*/
void
establish_ppp(fd)
int fd;
{
/* go through and save the name of all the modules, then pop em */
for (;;) {
if (ioctl(fd, I_LOOK, str_modules[str_module_count].modname) < 0 ||
ioctl(fd, I_POP, 0) < 0)
break;
MAINDEBUG((LOG_DEBUG, "popped stream module : %s",
str_modules[str_module_count].modname));
str_module_count++;
}
/* now push the async/fcs module */
if (ioctl(fd, I_PUSH, "pppasync") < 0) {
syslog(LOG_ERR, "ioctl(I_PUSH, ppp_async): %m");
die(1);
}
/* push the compress module */
if (ioctl(fd, I_PUSH, "pppcomp") < 0) {
syslog(LOG_WARNING, "ioctl(I_PUSH, ppp_comp): %m");
}
/* finally, push the ppp_if module that actually handles the */
/* network interface */
if (ioctl(fd, I_PUSH, "pppif") < 0) {
syslog(LOG_ERR, "ioctl(I_PUSH, ppp_if): %m");
die(1);
}
pushed_ppp = 1;
/* read mode, message non-discard mode
if (ioctl(fd, I_SRDOPT, RMSGN) < 0) {
syslog(LOG_ERR, "ioctl(I_SRDOPT, RMSGN): %m");
die(1);
}
*/
/*
* Find out which interface we were given.
* (ppp_if handles this ioctl)
*/
if (ioctl(fd, SIOCGETU, &ifunit) < 0) {
syslog(LOG_ERR, "ioctl(SIOCGETU): %m");
die(1);
}
/* Set debug flags in driver */
if (ioctl(fd, SIOCSIFDEBUG, kdebugflag) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFDEBUG): %m");
}
/* close stdin, stdout, stderr if they might refer to the device */
if (default_device && !closed_stdio) {
int i;
for (i = 0; i <= 2; ++i)
if (i != fd && i != sockfd)
close(i);
closed_stdio = 1;
}
/*
* Set device for non-blocking reads.
*/
if ((initfdflags = fcntl(fd, F_GETFL)) == -1
|| fcntl(fd, F_SETFL, initfdflags | O_NONBLOCK) == -1) {
syslog(LOG_WARNING, "Couldn't set device to non-blocking mode: %m");
}
}
/*
* disestablish_ppp - Restore the serial port to normal operation.
* It attempts to reconstruct the stream with the previously popped
* modules. This shouldn't call die() because it's called from die().
*/
void
disestablish_ppp(fd)
int fd;
{
int flags;
char *s;
/* Reset non-blocking mode on the file descriptor. */
if (initfdflags != -1 && fcntl(fd, F_SETFL, initfdflags) < 0)
syslog(LOG_WARNING, "Couldn't restore device fd flags: %m");
initfdflags = -1;
if (hungup) {
/* we can't push or pop modules after the stream has hung up */
str_module_count = 0;
restore_term = 0; /* nor can we fix up terminal settings */
return;
}
if (pushed_ppp) {
/*
* Check whether the link seems not to be 8-bit clean.
*/
if (ioctl(fd, SIOCGIFDEBUG, (caddr_t) &flags) == 0) {
s = NULL;
switch (~flags & PAI_FLAGS_HIBITS) {
case PAI_FLAGS_B7_0:
s = "bit 7 set to 1";
break;
case PAI_FLAGS_B7_1:
s = "bit 7 set to 0";
break;
case PAI_FLAGS_PAR_EVEN:
s = "odd parity";
break;
case PAI_FLAGS_PAR_ODD:
s = "even parity";
break;
}
if (s != NULL) {
syslog(LOG_WARNING, "Serial link is not 8-bit clean:");
syslog(LOG_WARNING, "All received characters had %s", s);
}
}
}
while (ioctl(fd, I_POP, 0) == 0) /* pop any we pushed */
;
pushed_ppp = 0;
for (; str_module_count > 0; str_module_count--) {
if (ioctl(fd, I_PUSH, str_modules[str_module_count-1].modname)) {
if (errno != ENXIO)
syslog(LOG_WARNING, "str_restore: couldn't push module %s: %m",
str_modules[str_module_count-1].modname);
} else {
MAINDEBUG((LOG_INFO, "str_restore: pushed module %s",
str_modules[str_module_count-1].modname));
}
}
}
/*
* List of valid speeds.
*/
struct speed {
int speed_int, speed_val;
} speeds[] = {
#ifdef B50
{ 50, B50 },
#endif
#ifdef B75
{ 75, B75 },
#endif
#ifdef B110
{ 110, B110 },
#endif
#ifdef B134
{ 134, B134 },
#endif
#ifdef B150
{ 150, B150 },
#endif
#ifdef B200
{ 200, B200 },
#endif
#ifdef B300
{ 300, B300 },
#endif
#ifdef B600
{ 600, B600 },
#endif
#ifdef B1200
{ 1200, B1200 },
#endif
#ifdef B1800
{ 1800, B1800 },
#endif
#ifdef B2000
{ 2000, B2000 },
#endif
#ifdef B2400
{ 2400, B2400 },
#endif
#ifdef B3600
{ 3600, B3600 },
#endif
#ifdef B4800
{ 4800, B4800 },
#endif
#ifdef B7200
{ 7200, B7200 },
#endif
#ifdef B9600
{ 9600, B9600 },
#endif
#ifdef B19200
{ 19200, B19200 },
#endif
#ifdef B38400
{ 38400, B38400 },
#endif
#ifdef EXTA
{ 19200, EXTA },
#endif
#ifdef EXTB
{ 38400, EXTB },
#endif
#ifdef B57600
{ 57600, B57600 },
#endif
#ifdef B115200
{ 115200, B115200 },
#endif
{ 0, 0 }
};
/*
* Translate from bits/second to a speed_t.
*/
static int
translate_speed(bps)
int bps;
{
struct speed *speedp;
if (bps == 0)
return 0;
for (speedp = speeds; speedp->speed_int; speedp++)
if (bps == speedp->speed_int)
return speedp->speed_val;
syslog(LOG_WARNING, "speed %d not supported", bps);
return 0;
}
/*
* Translate from a speed_t to bits/second.
*/
static int
baud_rate_of(speed)
int speed;
{
struct speed *speedp;
if (speed == 0)
return 0;
for (speedp = speeds; speedp->speed_int; speedp++)
if (speed == speedp->speed_val)
return speedp->speed_int;
return 0;
}
/*
* set_up_tty: Set up the serial port on `fd' for 8 bits, no parity,
* at the requested speed, etc. If `local' is true, set CLOCAL
* regardless of whether the modem option was specified.
*/
void
set_up_tty(fd, local)
int fd, local;
{
int speed;
struct termios tios;
struct termiox tiox;
if (tcgetattr(fd, &tios) < 0) {
syslog(LOG_ERR, "tcgetattr: %m");
die(1);
}
if (!restore_term)
inittermios = tios;
tios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CLOCAL);
if (crtscts > 0) {
bzero(&tiox, sizeof(tiox));
ioctl(fd, TCGETX, &tiox);
tiox.x_hflag = RTSXOFF;
ioctl(fd, TCSETX, &tiox);
tios.c_cflag &= ~(IXON | IXOFF);
} else if (crtscts < 0) {
bzero(&tiox, sizeof(tiox));
ioctl(fd, TCGETX, &tiox);
tiox.x_hflag &= ~RTSXOFF;
ioctl(fd, TCSETX, &tiox);
}
tios.c_cflag |= CS8 | CREAD | HUPCL;
if (local || !modem)
tios.c_cflag |= CLOCAL;
tios.c_iflag = IGNBRK | IGNPAR;
tios.c_oflag = 0;
tios.c_lflag = 0;
tios.c_cc[VMIN] = 1;
tios.c_cc[VTIME] = 0;
if (crtscts == -2) {
tios.c_iflag |= IXON | IXOFF;
tios.c_cc[VSTOP] = 0x13; /* DC3 = XOFF = ^S */
tios.c_cc[VSTART] = 0x11; /* DC1 = XON = ^Q */
}
speed = translate_speed(inspeed);
if (speed) {
cfsetospeed(&tios, speed);
cfsetispeed(&tios, speed);
} else {
speed = cfgetospeed(&tios);
/*
* We can't proceed if the serial port speed is B0,
* since that implies that the serial port is disabled.
*/
if (speed == B0) {
syslog(LOG_ERR, "Baud rate for %s is 0; need explicit baud rate",
devnam);
die(1);
}
}
if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
syslog(LOG_ERR, "tcsetattr: %m");
die(1);
}
baud_rate = inspeed = baud_rate_of(speed);
restore_term = 1;
}
/*
* restore_tty - restore the terminal to the saved settings.
*/
void
restore_tty(fd)
int fd;
{
if (restore_term) {
if (!default_device) {
/*
* Turn off echoing, because otherwise we can get into
* a loop with the tty and the modem echoing to each other.
* We presume we are the sole user of this tty device, so
* when we close it, it will revert to its defaults anyway.
*/
inittermios.c_lflag &= ~(ECHO | ECHONL);
}
if (tcsetattr(fd, TCSAFLUSH, &inittermios) < 0)
if (errno != ENXIO)
syslog(LOG_WARNING, "tcsetattr: %m");
restore_term = 0;
}
}
/*
* setdtr - control the DTR line on the serial port.
* This is called from die(), so it shouldn't call die().
*/
void
setdtr(fd, on)
int fd, on;
{
int modembits = TIOCM_DTR;
ioctl(fd, (on? TIOCMBIS: TIOCMBIC), &modembits);
}
/*
* output - Output PPP packet.
*/
void
output(unit, p, len)
int unit;
u_char *p;
int len;
{
struct strbuf str;
int retries;
struct pollfd pfd;
if (debug)
log_packet(p, len, "sent ", LOG_DEBUG);
str.len = len;
str.buf = (caddr_t) p;
retries = 4;
while (putmsg(ttyfd, NULL, &str, 0) < 0) {
if (--retries < 0 || (errno != EWOULDBLOCK && errno != EAGAIN)) {
if (errno != ENXIO)
syslog(LOG_ERR, "Couldn't send packet: %m");
break;
}
pfd.fd = ttyfd;
pfd.events = POLLOUT;
poll(&pfd, 1, 250); /* wait for up to 0.25 seconds */
}
}
/*
* wait_input - wait for input, for a length of time specified in *timo.
*/
void
wait_input(timo)
struct timeval *timo;
{
int t;
struct pollfd pfd;
t = timo == NULL? -1: timo->tv_sec * 1000 + timo->tv_usec / 1000;
pfd.fd = ttyfd;
pfd.events = POLLIN | POLLPRI | POLLHUP;
if (poll(&pfd, 1, t) < 0 && errno != EINTR) {
syslog(LOG_ERR, "poll: %m");
die(1);
}
}
/*
* read_packet - get a PPP packet from the serial device.
*/
int
read_packet(buf)
u_char *buf;
{
struct strbuf str, ctl;
int len, i;
unsigned char ctlbuf[16];
str.maxlen = PPP_MTU + PPP_HDRLEN;
str.buf = (caddr_t) buf;
ctl.maxlen = sizeof(ctlbuf);
ctl.buf = (caddr_t) ctlbuf;
i = 0;
len = getmsg(ttyfd, &ctl, &str, &i);
if (len < 0) {
if (errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR) {
return -1;
}
syslog(LOG_ERR, "getmsg %m");
die(1);
}
if (len)
MAINDEBUG((LOG_DEBUG, "getmsg returned 0x%x",len));
if (ctl.len > 0)
syslog(LOG_NOTICE, "got ctrl msg len %d %x %x\n", ctl.len,
ctlbuf[0], ctlbuf[1]);
if (str.len < 0) {
MAINDEBUG((LOG_DEBUG, "getmsg short return length %d", str.len));
return -1;
}
return str.len;
}
/*
* ppp_send_config - configure the transmit characteristics of
* the ppp interface.
*/
void
ppp_send_config(unit, mtu, asyncmap, pcomp, accomp)
int unit, mtu;
u_int32_t asyncmap;
int pcomp, accomp;
{
int c;
struct ifreq ifr;
strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
ifr.ifr_mtu = mtu;
if (ioctl(sockfd, SIOCSIFMTU, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFMTU): %m");
quit();
}
if(ioctl(ttyfd, SIOCSIFASYNCMAP, asyncmap) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFASYNCMAP): %m");
quit();
}
c = (pcomp? 1: 0);
if(ioctl(ttyfd, SIOCSIFCOMPPROT, c) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFCOMPPROT): %m");
quit();
}
c = (accomp? 1: 0);
if(ioctl(ttyfd, SIOCSIFCOMPAC, c) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFCOMPAC): %m");
quit();
}
}
/*
* ppp_set_xaccm - set the extended transmit ACCM for the interface.
*/
void
ppp_set_xaccm(unit, accm)
int unit;
ext_accm accm;
{
if (ioctl(ttyfd, SIOCSIFXASYNCMAP, accm) < 0 && errno != ENOTTY)
syslog(LOG_WARNING, "ioctl(set extended ACCM): %m");
}
/*
* ppp_recv_config - configure the receive-side characteristics of
* the ppp interface.
*/
void
ppp_recv_config(unit, mru, asyncmap, pcomp, accomp)
int unit, mru;
u_int32_t asyncmap;
int pcomp, accomp;
{
char c;
if (ioctl(ttyfd, SIOCSIFMRU, mru) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFMRU): %m");
}
if (ioctl(ttyfd, SIOCSIFRASYNCMAP, (caddr_t) asyncmap) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFRASYNCMAP): %m");
}
c = 2 + (pcomp? 1: 0);
if(ioctl(ttyfd, SIOCSIFCOMPPROT, c) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFCOMPPROT): %m");
}
c = 2 + (accomp? 1: 0);
if (ioctl(ttyfd, SIOCSIFCOMPAC, c) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFCOMPAC): %m");
}
}
/*
* ccp_test - ask kernel whether a given compression method
* is acceptable for use.
*/
int
ccp_test(unit, opt_ptr, opt_len, for_transmit)
int unit, opt_len, for_transmit;
u_char *opt_ptr;
{
struct ppp_option_data data;
if ((unsigned) opt_len > MAX_PPP_OPTION)
opt_len = MAX_PPP_OPTION;
data.length = opt_len;
data.transmit = for_transmit;
BCOPY(opt_ptr, data.opt_data, opt_len);
if (ioctl(ttyfd, SIOCSCOMPRESS, &data) >= 0)
return 1;
return (errno == ENOSR)? 0: -1;
}
/*
* ccp_flags_set - inform kernel about the current state of CCP.
*/
void
ccp_flags_set(unit, isopen, isup)
int unit, isopen, isup;
{
int x;
x = (isopen? 1: 0) + (isup? 2: 0);
if (ioctl(ttyfd, SIOCSIFCOMP, x) < 0 && errno != ENOTTY)
syslog(LOG_ERR, "ioctl (SIOCSIFCOMP): %m");
}
/*
* ccp_fatal_error - returns 1 if decompression was disabled as a
* result of an error detected after decompression of a packet,
* 0 otherwise. This is necessary because of patent nonsense.
*/
int
ccp_fatal_error(unit)
int unit;
{
int x;
if (ioctl(ttyfd, SIOCGIFCOMP, &x) < 0) {
syslog(LOG_ERR, "ioctl(SIOCGIFCOMP): %m");
return 0;
}
return x & CCP_FATALERROR;
}
/*
* sifvjcomp - config tcp header compression
*/
int
sifvjcomp(u, vjcomp, cidcomp, maxcid)
int u, vjcomp, cidcomp, maxcid;
{
int x;
x = (vjcomp? 1: 0) + (cidcomp? 0: 2) + (maxcid << 4);
if (ioctl(ttyfd, SIOCSIFVJCOMP, x) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFVJCOMP): %m");
return 0;
}
return 1;
}
/*
* sifup - Config the interface up and enable IP packets to pass.
*/
int
sifup(u)
int u;
{
struct ifreq ifr;
strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
return 0;
}
ifr.ifr_flags |= IFF_UP;
if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
return 0;
}
if_is_up = 1;
return 1;
}
/*
* sifnpmode - Set the mode for handling packets for a given NP.
*/
int
sifnpmode(u, proto, mode)
int u;
int proto;
enum NPmode mode;
{
struct npioctl npi;
npi.protocol = proto;
npi.mode = mode;
if (ioctl(ppp_fd, PPPIOCSNPMODE, &npi) < 0) {
syslog(LOG_ERR, "ioctl(set NP %d mode to %d): %m", proto, mode);
return 0;
}
return 1;
}
/*
* sifdown - Config the interface down.
*/
int
sifdown(u)
int u;
{
struct ifreq ifr;
int rv;
struct npioctl npi;
rv = 1;
npi.protocol = PPP_IP;
npi.mode = NPMODE_ERROR;
ioctl(ttyfd, SIOCSETNPMODE, &npi);
/* ignore errors, because ttyfd might have been closed by now. */
strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
if (ioctl(sockfd, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl (SIOCGIFFLAGS): %m");
rv = 0;
} else {
ifr.ifr_flags &= ~IFF_UP;
if (ioctl(sockfd, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFFLAGS): %m");
rv = 0;
} else
if_is_up = 0;
}
return rv;
}
/*
* SET_SA_FAMILY - initialize a struct sockaddr, setting the sa_family field.
*/
#define SET_SA_FAMILY(addr, family) \
BZERO((char *) &(addr), sizeof(addr)); \
addr.sa_family = (family);
/*
* sifaddr - Config the interface IP addresses and netmask.
*/
int
sifaddr(u, o, h, m)
int u;
u_int32_t o, h, m;
{
int ret;
struct ifreq ifr;
ret = 1;
strncpy(ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
SET_SA_FAMILY(ifr.ifr_addr, AF_INET);
if (m != 0) {
syslog(LOG_INFO, "Setting interface mask to %s\n", ip_ntoa(m));
((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = m;
if (ioctl(sockfd, SIOCSIFNETMASK, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFNETMASK): %m");
ret = 0;
}
}
((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFADDR): %m");
ret = 0;
}
SET_SA_FAMILY(ifr.ifr_dstaddr, AF_INET);
((struct sockaddr_in *) &ifr.ifr_dstaddr)->sin_addr.s_addr = h;
if (ioctl(sockfd, SIOCSIFDSTADDR, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFDSTADDR): %m");
ret = 0;
}
/* XXX is this necessary? */
((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr = o;
if (ioctl(sockfd, SIOCSIFADDR, (caddr_t) &ifr) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSIFADDR): %m");
ret = 0;
}
ifaddrs[0] = o;
ifaddrs[1] = h;
return ret;
}
/*
* cifaddr - Clear the interface IP addresses, and delete routes
* through the interface if possible.
*/
int
cifaddr(u, o, h)
int u;
u_int32_t o, h;
{
struct ortentry rt;
ifaddrs[0] = 0;
BZERO(&rt, sizeof(rt));
SET_SA_FAMILY(rt.rt_dst, AF_INET);
((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr = h;
SET_SA_FAMILY(rt.rt_gateway, AF_INET);
((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = o;
rt.rt_flags = RTF_HOST;
if (ioctl(sockfd, SIOCDELRT, (caddr_t) &rt) < 0) {
syslog(LOG_ERR, "ioctl(SIOCDELRT): %m");
return 0;
}
return 1;
}
/*
* sifdefaultroute - assign a default route through the address given.
*/
int
sifdefaultroute(u, l, g)
int u;
u_int32_t l, g;
{
struct ortentry rt;
BZERO(&rt, sizeof(rt));
SET_SA_FAMILY(rt.rt_dst, AF_INET);
SET_SA_FAMILY(rt.rt_gateway, AF_INET);
((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
rt.rt_flags = RTF_GATEWAY;
if (ioctl(sockfd, SIOCADDRT, &rt) < 0) {
syslog(LOG_ERR, "default route ioctl(SIOCADDRT): %m");
return 0;
}
default_route_gateway = g;
return 1;
}
/*
* cifdefaultroute - delete a default route through the address given.
*/
int
cifdefaultroute(u, l, g)
int u;
u_int32_t l, g;
{
struct ortentry rt;
BZERO(&rt, sizeof(rt));
SET_SA_FAMILY(rt.rt_dst, AF_INET);
SET_SA_FAMILY(rt.rt_gateway, AF_INET);
((struct sockaddr_in *) &rt.rt_gateway)->sin_addr.s_addr = g;
rt.rt_flags = RTF_GATEWAY;
if (ioctl(sockfd, SIOCDELRT, &rt) < 0) {
syslog(LOG_ERR, "default route ioctl(SIOCDELRT): %m");
return 0;
}
default_route_gateway = 0;
return 1;
}
/*
* sifproxyarp - Make a proxy ARP entry for the peer.
*/
int
sifproxyarp(unit, hisaddr)
int unit;
u_int32_t hisaddr;
{
struct arpreq arpreq;
BZERO(&arpreq, sizeof(arpreq));
/*
* Get the hardware address of an interface on the same subnet
* as our local address.
*/
if (!get_ether_addr(hisaddr, &arpreq.arp_ha)) {
syslog(LOG_WARNING, "Cannot determine ethernet address for proxy ARP");
return 0;
}
SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
arpreq.arp_flags = ATF_PERM | ATF_PUBL;
if (ioctl(sockfd, SIOCSARP, (caddr_t)&arpreq) < 0) {
syslog(LOG_ERR, "ioctl(SIOCSARP): %m");
return 0;
}
proxy_arp_addr = hisaddr;
return 1;
}
/*
* cifproxyarp - Delete the proxy ARP entry for the peer.
*/
int
cifproxyarp(unit, hisaddr)
int unit;
u_int32_t hisaddr;
{
struct arpreq arpreq;
BZERO(&arpreq, sizeof(arpreq));
SET_SA_FAMILY(arpreq.arp_pa, AF_INET);
((struct sockaddr_in *) &arpreq.arp_pa)->sin_addr.s_addr = hisaddr;
if (ioctl(sockfd, SIOCDARP, (caddr_t)&arpreq) < 0) {
syslog(LOG_ERR, "ioctl(SIOCDARP): %m");
return 0;
}
proxy_arp_addr = 0;
return 1;
}
/*
* get_ether_addr - get the hardware address of an interface on the
* the same subnet as ipaddr. Code borrowed from myetheraddr.c
* in the cslip-2.6 distribution, which is subject to the following
* copyright notice (which also applies to logwtmp below):
*
* Copyright (c) 1990, 1992 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include <nlist.h>
#include <arpa/inet.h>
#include <netinet/in_var.h>
#include <net/if_dl.h>
/* Cast a struct sockaddr to a structaddr_in */
#define SATOSIN(sa) ((struct sockaddr_in *)(sa))
/* Determine if "bits" is set in "flag" */
#define ALLSET(flag, bits) (((flag) & (bits)) == (bits))
static struct nlist nl[] = {
#define N_IFNET 0
{ "ifnet" },
{ 0 }
};
int kvm_read(int fd, off_t offset, void *buf, int nbytes)
{
if (lseek(fd, offset, SEEK_SET) != offset) {
syslog(LOG_ERR,"lseek in kmem: %m");
return(0);
}
return(read(fd, buf, nbytes));
}
int
get_ether_addr(ipaddr, hwaddr)
u_long ipaddr;
struct sockaddr *hwaddr;
{
int kd;
register struct ifnet *ifp;
register struct arpcom *ac;
struct arpcom arpcom;
struct in_addr *inp;
register struct ifaddr *ifa;
register struct in_ifaddr *in;
union {
struct ifaddr ifa;
struct in_ifaddr in;
} ifaddr;
struct ifaddr *ifap;
struct sockaddr ifaddrsaddr;
struct sockaddr_in ifmasksaddr;
struct sockaddr_in *ifinetptr;
struct sockaddr_dl *iflinkptr;
u_long addr, mask, ifip;
int found = 0;
/* Open kernel memory for reading */
if ((kd = open("/dev/kmem", O_RDONLY)) < 0) {
syslog(LOG_ERR, "/dev/kmem: %m");
return 0;
}
/* Fetch namelist */
if (nlist("/unix", nl) != 0) {
syslog(LOG_ERR, "nlist(): %m");
return 0;
}
ac = &arpcom;
ifp = &arpcom.ac_if;
ifa = &ifaddr.ifa;
in = &ifaddr.in;
if (kvm_read(kd, nl[N_IFNET].n_value, (char *)&addr, sizeof(addr))
!= sizeof(addr)) {
syslog(LOG_ERR, "error reading ifnet addr");
return 0;
}
for ( ; addr && !found; addr = (u_long)ifp->if_next) {
if (kvm_read(kd, addr, (char *)ac, sizeof(*ac)) != sizeof(*ac)) {
syslog(LOG_ERR, "error reading ifnet");
return 0;
}
/* Only look at configured, broadcast interfaces */
if (!ALLSET(ifp->if_flags, IFF_UP | IFF_BROADCAST))
continue;
/* This probably can't happen... */
if (ifp->if_addrlist == 0)
continue;
/* Get interface ip address */
for (ifap = ifp->if_addrlist; ifap; ifap=ifaddr.ifa.ifa_next) {
if (kvm_read(kd, (u_long)ifap, (char *)&ifaddr,
sizeof(ifaddr)) != sizeof(ifaddr)) {
syslog(LOG_ERR, "error reading ifaddr");
return 0;
}
if (kvm_read(kd, (u_long)ifaddr.ifa.ifa_addr, &ifaddrsaddr,
sizeof(struct sockaddr_in)) != sizeof(struct sockaddr_in)) {
syslog(LOG_ERR, "error reading ifaddrsaddr");
return(0);
}
if (kvm_read(kd, (u_long)ifaddr.ifa.ifa_netmask, &ifmasksaddr,
sizeof(struct sockaddr_in)) != sizeof(struct sockaddr_in)) {
syslog(LOG_ERR, "error reading ifmasksaddr");
return(0);
}
/* Check if this interface on the right subnet */
switch (ifaddrsaddr.sa_family) {
case AF_LINK :
hwaddr->sa_family = AF_UNSPEC;
iflinkptr = (struct sockaddr_dl *) &ifaddrsaddr;
bcopy(LLADDR(iflinkptr),hwaddr->sa_data,iflinkptr->sdl_alen);
break;
case AF_INET:
ifinetptr= (struct sockaddr_in *) &ifaddrsaddr;
ifip = ifinetptr->sin_addr.s_addr;
if (kvm_read(kd, (u_long)ifaddr.ifa.ifa_netmask, &ifmasksaddr,
sizeof(struct sockaddr_in)) != sizeof(struct sockaddr_in)) {
syslog(LOG_ERR, "error reading ifmasksaddr");
return(0);
}
mask = ifmasksaddr.sin_addr.s_addr;
if ((ipaddr & mask) == (ifip & mask))
++found;
break;
default:
break;
}
}
}
return(found);
}
/*
* Return user specified netmask, modified by any mask we might determine
* for address `addr' (in network byte order).
* Here we scan through the system's list of interfaces, looking for
* any non-point-to-point interfaces which might appear to be on the same
* network as `addr'. If we find any, we OR in their netmask to the
* user-specified netmask.
*/
#define MAX_IFS 32
u_int32_t
GetMask(addr)
u_int32_t addr;
{
u_int32_t mask, nmask, ina;
struct ifreq *ifr, *ifend, ifreq;
struct ifconf ifc;
struct ifreq ifs[MAX_IFS];
addr = ntohl(addr);
if (IN_CLASSA(addr)) /* determine network mask for address class */
nmask = IN_CLASSA_NET;
else if (IN_CLASSB(addr))
nmask = IN_CLASSB_NET;
else
nmask = IN_CLASSC_NET;
/* class D nets are disallowed by bad_ip_adrs */
mask = netmask | htonl(nmask);
/*
* Scan through the system's network interfaces.
*/
ifc.ifc_len = sizeof(ifs);
ifc.ifc_req = ifs;
if (ioctl(sockfd, SIOCGIFCONF, &ifc) < 0) {
syslog(LOG_WARNING, "ioctl(SIOCGIFCONF): %m");
return mask;
}
ifend = (struct ifreq *) (ifc.ifc_buf + ifc.ifc_len);
for (ifr = ifc.ifc_req; ifr < ifend; ++ifr) {
/*
* Check the interface's internet address.
*/
if (ifr->ifr_addr.sa_family != AF_INET)
continue;
ina = ((struct sockaddr_in *) &ifr->ifr_addr)->sin_addr.s_addr;
if ((ntohl(ina) & nmask) != (addr & nmask))
continue;
/*
* Check that the interface is up, and not point-to-point or loopback.
*/
strncpy(ifreq.ifr_name, ifr->ifr_name, sizeof(ifreq.ifr_name));
if (ioctl(sockfd, SIOCGIFFLAGS, &ifreq) < 0)
continue;
if ((ifreq.ifr_flags & (IFF_UP|IFF_POINTOPOINT|IFF_LOOPBACK))
!= IFF_UP)
continue;
/*
* Get its netmask and OR it into our mask.
*/
if (ioctl(sockfd, SIOCGIFNETMASK, &ifreq) < 0)
continue;
mask |= ((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr.s_addr;
}
return mask;
}
#define WTMPFILE "/var/adm/wtmp"
void
logwtmp(line, name, host)
const char *line, *name, *host;
{
int fd;
struct stat buf;
struct utmp ut;
if ((fd = open(WTMPFILE, O_WRONLY|O_APPEND, 0)) < 0)
return;
if (!fstat(fd, &buf)) {
(void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
(void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
(void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
(void)time(&ut.ut_time);
if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp))
(void)ftruncate(fd, buf.st_size);
}
close(fd);
}
/*
* Code for locking/unlocking the serial device.
*/
static char *devlocked = (char *) 0;
int lock(char *device)
{
char *devname;
int rc;
if (devname = strrchr(device,'/'))
++devname;
else
devname = device;
if ((rc = ttylock(devname)) == 0) {
devlocked = (char *) malloc(strlen(devname) + 1);
sprintf(devlocked,"%s",devname);
} else
devlocked = (char *) 0;
return(rc);
}
int unlock()
{
int rc = 0;
if (devlocked) {
rc = ttyunlock(devlocked);
free(devlocked);
devlocked = (char *) 0;
}
return(rc);
}
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