servers/lwip/inet_config.c
C | 271 lines | 195 code | 45 blank | 31 comment | 74 complexity | 579aa9d17e02a91b3755b08c6189f0e6 MD5 | raw file
Possible License(s): MIT, WTFPL, AGPL-1.0, BSD-3-Clause, GPL-3.0, LGPL-2.0, JSON, 0BSD
- /*
- 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
- #include <stdlib.h>
- #include <unistd.h>
- #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>
- #include <minix/syslib.h>
- #include "inet_config.h"
- #include "proto.h"
- #include "socket.h"
- 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];
- 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 */
- static int ifdefault= -1; /* Default network interface. */
- static void fatal(char *label)
- {
- printf("init: %s: %s\n", label, strerror(errno));
- exit(1);
- }
- static void check_mknod(char *device, mode_t mode, int minor)
- /* Check if a device exists with the proper device number. */
- {
- dev_t dev;
- dev= (ip_dev & 0xFF00) | minor;
- unlink(device);
- if (mknod(device, S_IFCHR | mode, dev) < 0) fatal(device);
- printf("mknod %s c %d %d\n", device, (ip_dev >> 8), minor);
- }
- static int cfg_fd;
- static char word[16];
- static unsigned char line[256], *lineptr;
- static unsigned linenr;
- static __dead void error(void)
- {
- printf("inet: error on line %u\n", linenr);
- exit(1);
- }
- 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);
- }
- static void token(int need)
- {
- /* Read a word from the configuration line. Return a null string on
- * EOL. Return a punctuation as a one character word. If 'need' is
- * 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 <= ' ') {
- if (*lineptr == 0) {
- if (need) error();
- return;
- }
- c = *lineptr++;
- }
- do {
- if (wp < (unsigned char *) word + sizeof(word)-1) *wp++ = c;
- c = (*lineptr != 0) ? *lineptr++ : ' ';
- if (word[0] == ';' || word[0] == '{' || word[0] == '}') {
- if (need) error();
- break;
- }
- } while (c > ' ' && c != ';' && c != '{' && c != '}');
- *wp = 0;
- }
- void inet_read_conf(void)
- {
- int ifno, enable;
- struct stat st;
- { static int first= 1;
- if (!first)
- panic(( "LWIP : read_conf: called a second time" ));
- first= 0;
- #if 0
- *(u8_t *)0 = 0xcc; /* INT 3 */
- #endif
- }
- /* Open the configuration file. */
- if ((cfg_fd= open(PATH_INET_CONF, O_RDONLY)) == -1)
- fatal(PATH_INET_CONF);
- while (nextline()) {
- token(1);
- char drv_name[128];
- unsigned instance;
- if (strncmp(word, "eth", 3) == 0) {
- ifno = strtol(word+3, NULL, 10);
- token(1);
- #if 1
- strncpy(drv_name, word, 128);
- #else
- sprintf(drv_name, "%s_debug", word);
- #endif
- token(1);
- instance = strtol(word, NULL, 10);
- } else {
- printf("inet: Unknown device '%s'\n", word);
- error();
- }
- enable= 7; /* 1 = IP, 2 = TCP, 4 = UDP */
- 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);
- }
- if (word[0] == ';') token(0);
- else
- if (word[0] != '}') error();
- }
- token(0);
- }
- if (word[0] != ';' && word[0] != 0) error();
- nic_assign_driver("eth", ifno, drv_name, instance, ifdefault == ifno);
- }
- if (ifdefault == -1) {
- printf("inet: No networks or no default network defined\n");
- exit(1);
- }
- /* 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;
- /* create protocol devices */
- check_mknod("/dev/ip", 0600, SOCK_TYPE_IP);
- check_mknod("/dev/tcp", 0666, SOCK_TYPE_TCP);
- check_mknod("/dev/udp", 0666, SOCK_TYPE_UDP);
- /*
- * create hw devices, to configure ip we need also ip devices for each
- */
- check_mknod("/dev/ip0", 0600, SOCK_TYPES + 0);
- check_mknod("/dev/eth0", 0600, SOCK_TYPES + 0);
- check_mknod("/dev/ip1", 0600, SOCK_TYPES + 1);
- check_mknod("/dev/eth1", 0600, SOCK_TYPES + 1);
- check_mknod("/dev/ip2", 0600, SOCK_TYPES + 2);
- check_mknod("/dev/eth2", 0600, SOCK_TYPES + 2);
- check_mknod("/dev/ip3", 0600, SOCK_TYPES + 3);
- check_mknod("/dev/eth3", 0600, SOCK_TYPES + 3);
- check_mknod("/dev/ip4", 0600, SOCK_TYPES + 4);
- check_mknod("/dev/eth4", 0600, SOCK_TYPES + 4);
- }