minix/servers/inet/inet_config.c

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/*
inet/inet_config.c
Created: Nov 11, 1992 by Philip Homburg
Modified: Apr 07, 2001 by Kees J. Bot
Read the configuration file and fill in the xx_conf[] arrays.
Copyright 1995 Philip Homburg
*/
#define _MINIX_SOURCE 1
#define _POSIX_SOURCE 1
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#include <stdlib.h>
#include <unistd.h>
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#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <minix/type.h>
#include <minix/sysutil.h>
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#include <minix/syslib.h>
#include "inet_config.h"
#include "inet.h"
THIS_FILE
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struct eth_conf eth_conf[IP_PORT_MAX];
struct psip_conf psip_conf[IP_PORT_MAX];
struct ip_conf ip_conf[IP_PORT_MAX];
struct tcp_conf tcp_conf[IP_PORT_MAX];
struct udp_conf udp_conf[IP_PORT_MAX];
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dev_t ip_dev;
int eth_conf_nr;
int psip_conf_nr;
int ip_conf_nr;
int tcp_conf_nr;
int udp_conf_nr;
int ip_forward_directed_bcast= 0; /* Default is off */
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static u8_t iftype[IP_PORT_MAX]; /* Interface in use as? */
static int ifdefault= -1; /* Default network interface. */
static void fatal(char *label)
{
printf("init: %s: %s\n", label, strerror(errno));
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exit(1);
}
static void check_rm(char *device)
/* Check if a device is not among the living. */
{
if (unlink(device) < 0) {
if (errno == ENOENT) return;
fatal(device);
}
printf("rm %s\n", device);
}
static void check_mknod(char *device, mode_t mode, int minor)
/* Check if a device exists with the proper device number. */
{
struct stat st;
dev_t dev;
dev= makedev(major(ip_dev), minor);
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if (stat(device, &st) < 0) {
if (errno != ENOENT) fatal(device);
} else {
if (S_ISCHR(st.st_mode) && st.st_rdev == dev) return;
if (unlink(device) < 0) fatal(device);
}
if (mknod(device, S_IFCHR | mode, dev) < 0) fatal(device);
printf("mknod %s c %d %d\n", device, major(ip_dev), minor);
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}
static void check_ln(char *old, char *new)
/* Check if 'old' and 'new' are still properly linked. */
{
struct stat st_old, st_new;
if (stat(old, &st_old) < 0) fatal(old);
if (stat(new, &st_new) < 0) {
if (errno != ENOENT) fatal(new);
} else {
if (st_new.st_dev == st_old.st_dev
&& st_new.st_ino == st_old.st_ino) {
return;
}
if (unlink(new) < 0) fatal(new);
}
if (link(old, new) < 0) fatal(new);
printf("ln %s %s\n", old, new);
}
static void check_dev(int type, int ifno)
/* Check if the device group with interface number 'ifno' exists and has the
* proper device numbers. If 'type' is -1 then the device group must be
* removed.
*/
{
static struct devlist {
char *defname;
mode_t mode;
u8_t minor_off;
} devlist[] = {
{ "/dev/eth", 0600, ETH_DEV_OFF },
{ "/dev/psip", 0600, PSIP_DEV_OFF },
{ "/dev/ip", 0600, IP_DEV_OFF },
{ "/dev/tcp", 0666, TCP_DEV_OFF },
{ "/dev/udp", 0666, UDP_DEV_OFF },
};
struct devlist *dvp;
int i;
char device[sizeof("/dev/psip99")];
char *dp;
for (i= 0; i < sizeof(devlist) / sizeof(devlist[0]); i++) {
dvp= &devlist[i];
strcpy(device, dvp->defname);
dp= device + strlen(device);
if (ifno >= 10) *dp++ = '0' + (ifno / 10);
*dp++ = '0' + (ifno % 10);
*dp = 0;
if (type == 0
|| (i == 0 && type != NETTYPE_ETH)
|| (i == 1 && type != NETTYPE_PSIP)
) {
check_rm(device);
if (ifno == ifdefault) check_rm(dvp->defname);
} else {
check_mknod(device, dvp->mode,
if2minor(ifno, dvp->minor_off));
if (ifno == ifdefault) check_ln(device, dvp->defname);
}
}
check_mknod(IPSTAT_DEV, IPSTAT_MODE, IPSTAT_MINOR);
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}
static int cfg_fd;
static char word[16];
This patch switches the MINIX3 ethernet driver stack from a port-based model to an instance-based model. Each ethernet driver instance is now responsible for exactly one network interface card. The port field in /etc/inet.conf now acts as an instance field instead. This patch also updates the data link protocol. This update: - eliminates the concept of ports entirely; - eliminates DL_GETNAME entirely; - standardizes on using m_source for IPC and DL_ENDPT for safecopies; - removes error codes from TASK/STAT replies, as they were unused; - removes a number of other old or unused fields; - names and renames a few other fields. All ethernet drivers have been changed to: - conform to the new protocol, and exactly that; - take on an instance number based on a given "instance" argument; - skip that number of PCI devices in probe iterations; - use config tables and environment variables based on that number; - no longer be limited to a predefined maximum of cards in any way; - get rid of any leftover non-safecopy support and other ancient junk; - have a correct banner protocol figure, or none at all. Other changes: * Inet.conf is now taken to be line-based, and supports #-comments. No existing installations are expected to be affected by this. * A new, select-based asynchio library replaces the old one. Kindly contributed by Kees J. Bot. * Inet now supports use of select() on IP devices. Combined, the last two changes together speed up dhcpd considerably in the presence of multiple interfaces. * A small bug has been fixed in nonamed.
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static unsigned char line[256], *lineptr;
static unsigned linenr;
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static void error(void)
{
This patch switches the MINIX3 ethernet driver stack from a port-based model to an instance-based model. Each ethernet driver instance is now responsible for exactly one network interface card. The port field in /etc/inet.conf now acts as an instance field instead. This patch also updates the data link protocol. This update: - eliminates the concept of ports entirely; - eliminates DL_GETNAME entirely; - standardizes on using m_source for IPC and DL_ENDPT for safecopies; - removes error codes from TASK/STAT replies, as they were unused; - removes a number of other old or unused fields; - names and renames a few other fields. All ethernet drivers have been changed to: - conform to the new protocol, and exactly that; - take on an instance number based on a given "instance" argument; - skip that number of PCI devices in probe iterations; - use config tables and environment variables based on that number; - no longer be limited to a predefined maximum of cards in any way; - get rid of any leftover non-safecopy support and other ancient junk; - have a correct banner protocol figure, or none at all. Other changes: * Inet.conf is now taken to be line-based, and supports #-comments. No existing installations are expected to be affected by this. * A new, select-based asynchio library replaces the old one. Kindly contributed by Kees J. Bot. * Inet now supports use of select() on IP devices. Combined, the last two changes together speed up dhcpd considerably in the presence of multiple interfaces. * A small bug has been fixed in nonamed.
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printf("inet: error on line %u\n", linenr);
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exit(1);
}
This patch switches the MINIX3 ethernet driver stack from a port-based model to an instance-based model. Each ethernet driver instance is now responsible for exactly one network interface card. The port field in /etc/inet.conf now acts as an instance field instead. This patch also updates the data link protocol. This update: - eliminates the concept of ports entirely; - eliminates DL_GETNAME entirely; - standardizes on using m_source for IPC and DL_ENDPT for safecopies; - removes error codes from TASK/STAT replies, as they were unused; - removes a number of other old or unused fields; - names and renames a few other fields. All ethernet drivers have been changed to: - conform to the new protocol, and exactly that; - take on an instance number based on a given "instance" argument; - skip that number of PCI devices in probe iterations; - use config tables and environment variables based on that number; - no longer be limited to a predefined maximum of cards in any way; - get rid of any leftover non-safecopy support and other ancient junk; - have a correct banner protocol figure, or none at all. Other changes: * Inet.conf is now taken to be line-based, and supports #-comments. No existing installations are expected to be affected by this. * A new, select-based asynchio library replaces the old one. Kindly contributed by Kees J. Bot. * Inet now supports use of select() on IP devices. Combined, the last two changes together speed up dhcpd considerably in the presence of multiple interfaces. * A small bug has been fixed in nonamed.
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static int nextline(void)
{
/* Read a line from the configuration file, to be used by subsequent
* token() calls. Skip empty lines, and lines where the first character
* after leading "whitespace" is '#'. The last line of the file need
* not be terminated by a newline. Return 1 if a line was read in
* successfully, and 0 on EOF or error.
*/
unsigned char *lp, c;
int r, skip;
lineptr = lp = line;
linenr++;
skip = -1;
while ((r = read(cfg_fd, &c, 1)) == 1) {
if (c == '\n') {
if (skip == 0)
break;
linenr++;
skip = -1;
continue;
}
if (skip == -1 && c > ' ')
skip = (c == '#');
if (skip == 0 && lp < (unsigned char *) line + sizeof(line)-1)
*lp++ = c;
}
*lp = 0;
return (r == 1 || lp != line);
}
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static void token(int need)
{
This patch switches the MINIX3 ethernet driver stack from a port-based model to an instance-based model. Each ethernet driver instance is now responsible for exactly one network interface card. The port field in /etc/inet.conf now acts as an instance field instead. This patch also updates the data link protocol. This update: - eliminates the concept of ports entirely; - eliminates DL_GETNAME entirely; - standardizes on using m_source for IPC and DL_ENDPT for safecopies; - removes error codes from TASK/STAT replies, as they were unused; - removes a number of other old or unused fields; - names and renames a few other fields. All ethernet drivers have been changed to: - conform to the new protocol, and exactly that; - take on an instance number based on a given "instance" argument; - skip that number of PCI devices in probe iterations; - use config tables and environment variables based on that number; - no longer be limited to a predefined maximum of cards in any way; - get rid of any leftover non-safecopy support and other ancient junk; - have a correct banner protocol figure, or none at all. Other changes: * Inet.conf is now taken to be line-based, and supports #-comments. No existing installations are expected to be affected by this. * A new, select-based asynchio library replaces the old one. Kindly contributed by Kees J. Bot. * Inet now supports use of select() on IP devices. Combined, the last two changes together speed up dhcpd considerably in the presence of multiple interfaces. * A small bug has been fixed in nonamed.
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/* Read a word from the configuration line. Return a null string on
* EOL. Return a punctuation as a one character word. If 'need' is
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* true then an actual word is expected at this point, so err out if
* not.
*/
unsigned char *wp;
static unsigned char c= '\n';
wp= (unsigned char *) word;
*wp = 0;
while (c <= ' ') {
This patch switches the MINIX3 ethernet driver stack from a port-based model to an instance-based model. Each ethernet driver instance is now responsible for exactly one network interface card. The port field in /etc/inet.conf now acts as an instance field instead. This patch also updates the data link protocol. This update: - eliminates the concept of ports entirely; - eliminates DL_GETNAME entirely; - standardizes on using m_source for IPC and DL_ENDPT for safecopies; - removes error codes from TASK/STAT replies, as they were unused; - removes a number of other old or unused fields; - names and renames a few other fields. All ethernet drivers have been changed to: - conform to the new protocol, and exactly that; - take on an instance number based on a given "instance" argument; - skip that number of PCI devices in probe iterations; - use config tables and environment variables based on that number; - no longer be limited to a predefined maximum of cards in any way; - get rid of any leftover non-safecopy support and other ancient junk; - have a correct banner protocol figure, or none at all. Other changes: * Inet.conf is now taken to be line-based, and supports #-comments. No existing installations are expected to be affected by this. * A new, select-based asynchio library replaces the old one. Kindly contributed by Kees J. Bot. * Inet now supports use of select() on IP devices. Combined, the last two changes together speed up dhcpd considerably in the presence of multiple interfaces. * A small bug has been fixed in nonamed.
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if (*lineptr == 0) {
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if (need) error();
return;
}
This patch switches the MINIX3 ethernet driver stack from a port-based model to an instance-based model. Each ethernet driver instance is now responsible for exactly one network interface card. The port field in /etc/inet.conf now acts as an instance field instead. This patch also updates the data link protocol. This update: - eliminates the concept of ports entirely; - eliminates DL_GETNAME entirely; - standardizes on using m_source for IPC and DL_ENDPT for safecopies; - removes error codes from TASK/STAT replies, as they were unused; - removes a number of other old or unused fields; - names and renames a few other fields. All ethernet drivers have been changed to: - conform to the new protocol, and exactly that; - take on an instance number based on a given "instance" argument; - skip that number of PCI devices in probe iterations; - use config tables and environment variables based on that number; - no longer be limited to a predefined maximum of cards in any way; - get rid of any leftover non-safecopy support and other ancient junk; - have a correct banner protocol figure, or none at all. Other changes: * Inet.conf is now taken to be line-based, and supports #-comments. No existing installations are expected to be affected by this. * A new, select-based asynchio library replaces the old one. Kindly contributed by Kees J. Bot. * Inet now supports use of select() on IP devices. Combined, the last two changes together speed up dhcpd considerably in the presence of multiple interfaces. * A small bug has been fixed in nonamed.
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c = *lineptr++;
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}
do {
if (wp < (unsigned char *) word + sizeof(word)-1) *wp++ = c;
This patch switches the MINIX3 ethernet driver stack from a port-based model to an instance-based model. Each ethernet driver instance is now responsible for exactly one network interface card. The port field in /etc/inet.conf now acts as an instance field instead. This patch also updates the data link protocol. This update: - eliminates the concept of ports entirely; - eliminates DL_GETNAME entirely; - standardizes on using m_source for IPC and DL_ENDPT for safecopies; - removes error codes from TASK/STAT replies, as they were unused; - removes a number of other old or unused fields; - names and renames a few other fields. All ethernet drivers have been changed to: - conform to the new protocol, and exactly that; - take on an instance number based on a given "instance" argument; - skip that number of PCI devices in probe iterations; - use config tables and environment variables based on that number; - no longer be limited to a predefined maximum of cards in any way; - get rid of any leftover non-safecopy support and other ancient junk; - have a correct banner protocol figure, or none at all. Other changes: * Inet.conf is now taken to be line-based, and supports #-comments. No existing installations are expected to be affected by this. * A new, select-based asynchio library replaces the old one. Kindly contributed by Kees J. Bot. * Inet now supports use of select() on IP devices. Combined, the last two changes together speed up dhcpd considerably in the presence of multiple interfaces. * A small bug has been fixed in nonamed.
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c = (*lineptr != 0) ? *lineptr++ : ' ';
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if (word[0] == ';' || word[0] == '{' || word[0] == '}') {
if (need) error();
break;
}
} while (c > ' ' && c != ';' && c != '{' && c != '}');
*wp = 0;
}
static unsigned number(char *str, unsigned max)
{
/* Interpret a string as an unsigned decimal number, no bigger than
* 'max'. Return this number.
*/
char *s;
unsigned n, d;
s= str;
n= 0;
while ((d= (*s - '0')) < 10 && n <= max) {
n= n * 10 + d;
s++;
}
if (*s != 0 || n > max) {
printf("inet: '%s' is not a number <= %u\n", str, max);
error();
}
return n;
}
void read_conf(void)
{
int i, j, ifno = -1, type = -1, port = -1, enable;
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struct eth_conf *ecp;
struct psip_conf *pcp;
struct ip_conf *icp;
struct stat st;
This patch switches the MINIX3 ethernet driver stack from a port-based model to an instance-based model. Each ethernet driver instance is now responsible for exactly one network interface card. The port field in /etc/inet.conf now acts as an instance field instead. This patch also updates the data link protocol. This update: - eliminates the concept of ports entirely; - eliminates DL_GETNAME entirely; - standardizes on using m_source for IPC and DL_ENDPT for safecopies; - removes error codes from TASK/STAT replies, as they were unused; - removes a number of other old or unused fields; - names and renames a few other fields. All ethernet drivers have been changed to: - conform to the new protocol, and exactly that; - take on an instance number based on a given "instance" argument; - skip that number of PCI devices in probe iterations; - use config tables and environment variables based on that number; - no longer be limited to a predefined maximum of cards in any way; - get rid of any leftover non-safecopy support and other ancient junk; - have a correct banner protocol figure, or none at all. Other changes: * Inet.conf is now taken to be line-based, and supports #-comments. No existing installations are expected to be affected by this. * A new, select-based asynchio library replaces the old one. Kindly contributed by Kees J. Bot. * Inet now supports use of select() on IP devices. Combined, the last two changes together speed up dhcpd considerably in the presence of multiple interfaces. * A small bug has been fixed in nonamed.
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char buf[sizeof(word)];
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{ static int first= 1;
if (!first) ip_panic(( "read_conf: called a second time" ));
first= 0;
#if 0
*(u8_t *)0 = 0xcc; /* INT 3 */
#endif
}
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/* Open the configuration file. */
if ((cfg_fd= open(PATH_INET_CONF, O_RDONLY)) == -1)
fatal(PATH_INET_CONF);
ecp= eth_conf;
pcp= psip_conf;
icp= ip_conf;
This patch switches the MINIX3 ethernet driver stack from a port-based model to an instance-based model. Each ethernet driver instance is now responsible for exactly one network interface card. The port field in /etc/inet.conf now acts as an instance field instead. This patch also updates the data link protocol. This update: - eliminates the concept of ports entirely; - eliminates DL_GETNAME entirely; - standardizes on using m_source for IPC and DL_ENDPT for safecopies; - removes error codes from TASK/STAT replies, as they were unused; - removes a number of other old or unused fields; - names and renames a few other fields. All ethernet drivers have been changed to: - conform to the new protocol, and exactly that; - take on an instance number based on a given "instance" argument; - skip that number of PCI devices in probe iterations; - use config tables and environment variables based on that number; - no longer be limited to a predefined maximum of cards in any way; - get rid of any leftover non-safecopy support and other ancient junk; - have a correct banner protocol figure, or none at all. Other changes: * Inet.conf is now taken to be line-based, and supports #-comments. No existing installations are expected to be affected by this. * A new, select-based asynchio library replaces the old one. Kindly contributed by Kees J. Bot. * Inet now supports use of select() on IP devices. Combined, the last two changes together speed up dhcpd considerably in the presence of multiple interfaces. * A small bug has been fixed in nonamed.
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while (nextline()) {
token(1);
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if (strncmp(word, "eth", 3) == 0) {
ecp->ec_ifno= ifno= number(word+3, IP_PORT_MAX-1);
type= NETTYPE_ETH;
port= eth_conf_nr;
token(1);
if (strcmp(word, "vlan") == 0) {
token(1);
ecp->ec_vlan= number(word, (1<<12)-1);
token(1);
if (strncmp(word, "eth", 3) != 0) {
printf(
"inet: VLAN eth%d can't be built on %s\n",
ifno, word);
exit(1);
}
ecp->ec_port= number(word+3, IP_PORT_MAX-1);
} else {
This patch switches the MINIX3 ethernet driver stack from a port-based model to an instance-based model. Each ethernet driver instance is now responsible for exactly one network interface card. The port field in /etc/inet.conf now acts as an instance field instead. This patch also updates the data link protocol. This update: - eliminates the concept of ports entirely; - eliminates DL_GETNAME entirely; - standardizes on using m_source for IPC and DL_ENDPT for safecopies; - removes error codes from TASK/STAT replies, as they were unused; - removes a number of other old or unused fields; - names and renames a few other fields. All ethernet drivers have been changed to: - conform to the new protocol, and exactly that; - take on an instance number based on a given "instance" argument; - skip that number of PCI devices in probe iterations; - use config tables and environment variables based on that number; - no longer be limited to a predefined maximum of cards in any way; - get rid of any leftover non-safecopy support and other ancient junk; - have a correct banner protocol figure, or none at all. Other changes: * Inet.conf is now taken to be line-based, and supports #-comments. No existing installations are expected to be affected by this. * A new, select-based asynchio library replaces the old one. Kindly contributed by Kees J. Bot. * Inet now supports use of select() on IP devices. Combined, the last two changes together speed up dhcpd considerably in the presence of multiple interfaces. * A small bug has been fixed in nonamed.
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/* The process label consists of the driver
* name, an underscore, and the instance
* number.
*/
strncpy(buf, word, sizeof(buf)-1);
buf[sizeof(buf)-1]= 0;
token(1);
This patch switches the MINIX3 ethernet driver stack from a port-based model to an instance-based model. Each ethernet driver instance is now responsible for exactly one network interface card. The port field in /etc/inet.conf now acts as an instance field instead. This patch also updates the data link protocol. This update: - eliminates the concept of ports entirely; - eliminates DL_GETNAME entirely; - standardizes on using m_source for IPC and DL_ENDPT for safecopies; - removes error codes from TASK/STAT replies, as they were unused; - removes a number of other old or unused fields; - names and renames a few other fields. All ethernet drivers have been changed to: - conform to the new protocol, and exactly that; - take on an instance number based on a given "instance" argument; - skip that number of PCI devices in probe iterations; - use config tables and environment variables based on that number; - no longer be limited to a predefined maximum of cards in any way; - get rid of any leftover non-safecopy support and other ancient junk; - have a correct banner protocol figure, or none at all. Other changes: * Inet.conf is now taken to be line-based, and supports #-comments. No existing installations are expected to be affected by this. * A new, select-based asynchio library replaces the old one. Kindly contributed by Kees J. Bot. * Inet now supports use of select() on IP devices. Combined, the last two changes together speed up dhcpd considerably in the presence of multiple interfaces. * A small bug has been fixed in nonamed.
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ecp->ec_label=
alloc(strlen(buf)+1+strlen(word)+1);
sprintf(ecp->ec_label, "%s_%s", buf, word);
ecp->ec_port= 0;
}
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ecp++;
eth_conf_nr++;
} else if (strncmp(word, "psip", 4) == 0) {
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pcp->pc_ifno= ifno= number(word+4, IP_PORT_MAX-1);
type= NETTYPE_PSIP;
port= psip_conf_nr;
pcp++;
psip_conf_nr++;
} else {
printf("inet: Unknown device '%s'\n", word);
error();
}
if (type == -1 || ifno == -1 || port == -1) {
printf("inet: faulty configuration\n");
exit(1);
}
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iftype[ifno]= type;
icp->ic_ifno= ifno;
icp->ic_devtype= type;
icp->ic_port= port;
tcp_conf[tcp_conf_nr].tc_port= ip_conf_nr;
udp_conf[udp_conf_nr].uc_port= ip_conf_nr;
enable= 7; /* 1 = IP, 2 = TCP, 4 = UDP */
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token(0);
if (word[0] == '{') {
token(0);
while (word[0] != '}') {
if (strcmp(word, "default") == 0) {
if (ifdefault != -1) {
printf(
"inet: ip%d and ip%d can't both be default\n",
ifdefault, ifno);
error();
}
ifdefault= ifno;
token(0);
} else
if (strcmp(word, "no") == 0) {
token(1);
if (strcmp(word, "ip") == 0) {
enable= 0;
} else
if (strcmp(word, "tcp") == 0) {
enable &= ~2;
} else
if (strcmp(word, "udp") == 0) {
enable &= ~4;
} else {
printf(
"inet: Can't do 'no %s'\n",
word);
exit(1);
}
token(0);
} else {
printf("inet: Unknown option '%s'\n",
word);
exit(1);
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}
if (word[0] == ';') token(0);
else
if (word[0] != '}') error();
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}
token(0);
}
if (word[0] != ';' && word[0] != 0) error();
if (enable & 1) icp++, ip_conf_nr++;
if (enable & 2) tcp_conf_nr++;
if (enable & 4) udp_conf_nr++;
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}
if (ifdefault == -1) {
printf("inet: No networks or no default network defined\n");
exit(1);
}
/* Translate VLAN network references to port numbers. */
for (i= 0; i < eth_conf_nr; i++) {
ecp= &eth_conf[i];
if (eth_is_vlan(ecp)) {
for (j= 0; j < eth_conf_nr; j++) {
if (eth_conf[j].ec_ifno == ecp->ec_port
&& !eth_is_vlan(&eth_conf[j])
) {
ecp->ec_port= j;
break;
}
}
if (j == eth_conf_nr) {
printf(
"inet: VLAN eth%d can't be built on eth%d\n",
ecp->ec_ifno, ecp->ec_port);
exit(1);
}
}
}
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/* Set umask 0 so we can creat mode 666 devices. */
(void) umask(0);
/* See what the device number of /dev/ip is. That's what we
* used last time for the network devices, so we keep doing so.
*/
if (stat("/dev/ip", &st) < 0) fatal("/dev/ip");
ip_dev= st.st_rdev;
for (i= 0; i < IP_PORT_MAX; i++) {
/* Create network devices. */
check_dev(iftype[i], i);
}
}
void *alloc(size_t size)
{
/* Allocate memory on the heap with sbrk(). */
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return malloc(size);
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}
/*
* $PchId: inet_config.c,v 1.10 2003/08/21 09:26:02 philip Exp $
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*/