From 0fceb64d25ff3d9586549bb43d971c5eef904330 Mon Sep 17 00:00:00 2001
From: Ralf Baechle <ralf@linux-mips.org>
Date: Mon, 7 Jun 1999 10:23:42 +0200
Subject: Import ax25-apps 0.0.1 from tarball

---
 ax25rtd/config.c | 736 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 736 insertions(+)
 create mode 100644 ax25rtd/config.c

(limited to 'ax25rtd/config.c')

diff --git a/ax25rtd/config.c b/ax25rtd/config.c
new file mode 100644
index 0000000..1306d2a
--- /dev/null
+++ b/ax25rtd/config.c
@@ -0,0 +1,736 @@
+/* $Id: config.c,v 1.7 1997/06/05 18:55:51 oe1kib Exp oe1kib $
+ *
+ * Copyright (c) 1996 Jörg Reuter (jreuter@poboxes.com)
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+ 
+#include <stdio.h>
+#include <stdlib.h> 
+#include <unistd.h>
+#include <fcntl.h> 
+#include <string.h> 
+#include <ctype.h> 
+#include <errno.h>
+#include <time.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <net/if.h>
+#include <net/ethernet.h>
+#include <net/if_arp.h>
+#include <netax25/ax25.h>
+#include <netrose/rose.h>
+#include <netax25/axlib.h>
+#include <netax25/axconfig.h>
+
+#include "../pathnames.h"
+#include "ax25rtd.h"
+ 
+ax25_address *asc2ax(char *call)
+{
+	static ax25_address callsign;
+	
+	ax25_aton_entry(call, (char *)&callsign);
+	
+	return &callsign;
+}
+
+static long asc2ip(char *s)
+{
+	struct in_addr addr;
+
+	if (!inet_aton(s, &addr))
+		return 0;
+
+	return addr.s_addr;
+}
+
+
+char * prepare_cmdline(char *buf)
+{
+	char *p;
+	for (p = buf; *p; p++)
+	{
+		if (*p == '\t') *p = ' ';
+		*p = tolower(*p);
+		
+		if (*p == '\n')
+		{
+			*p = '\0';
+			break;
+		}
+		
+		if (*p == '#') 
+		{
+			*p = '\0';
+			break;
+		}
+	}
+	
+	return buf;
+}
+
+char * get_next_arg(char **p)
+{
+	char *p2;
+	
+	if (p == NULL || *p == NULL)
+		return NULL;
+
+	p2 = *p;
+	for (; *p2 && *p2 == ' '; p2++) ;
+	if (!*p2)
+		return NULL;
+		
+	*p = strchr(p2, ' ');
+	if (*p != NULL)
+	{
+		**p = '\0';
+		(*p)++;
+	}
+	
+	return p2;
+}
+
+static inline void invalid_arg(char *c, char *p)
+{
+	fprintf(stderr, "%s: invalid argument %s\n", c, p);
+}
+
+static inline void missing_arg(char *c)
+{
+	fprintf(stderr, "%s: argument missing\n", c);
+}
+
+static int yesno(char *arg)
+{
+	if (!arg)
+		return 0;
+	if (!strcmp(arg, "yes") || !strcmp(arg, "1"))
+		return 1;
+	if (!strcmp(arg, "no")  || !strcmp(arg, "0"))
+		return 0;
+	return -1;
+}
+
+static ax25_address *get_mycall(char *port)
+{
+	char *addr;
+	
+	if ((addr = ax25_config_get_addr(port)) == NULL)
+		return NULL;
+
+	return asc2ax(addr);
+}
+
+
+void load_ports(void)
+{
+	config *config, *cfg, *ncfg;
+	char buf[1024];
+	struct ifconf ifc;
+	struct ifreq  ifr, *ifrp;
+	int k, fd;
+
+	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) 
+	{
+		fprintf(stderr, "Unable to open socket\n");
+		exit(1);
+	}
+	                                                        
+        ifc.ifc_len = sizeof(buf);
+        ifc.ifc_buf = buf;
+        if (ioctl(fd, SIOCGIFCONF, &ifc) < 0) 
+        {
+                fprintf(stderr, "SIOCGIFCONF: %s\n", strerror(errno));
+                return;
+        }
+
+	ifrp = ifc.ifc_req;
+        for (k = ifc.ifc_len / sizeof(struct ifreq); k > 0; k--, ifrp++) 
+        {
+        	strcpy(ifr.ifr_name, ifrp->ifr_name);
+		if (strcmp(ifr.ifr_name, "lo") == 0) continue;
+
+		if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) 
+		{
+			fprintf(stderr, "SIOCGIFFLAGS: %s\n", strerror(errno));
+			exit(1);
+                }
+
+		if (!(ifr.ifr_flags & IFF_UP)) continue;
+
+		ioctl(fd, SIOCGIFHWADDR, &ifr);
+
+		if (ifr.ifr_hwaddr.sa_family != ARPHRD_AX25)
+			continue;
+
+		for (config = Config; config; config = config->next)
+			if (!memcmp(&config->mycalls[0], ifr.ifr_hwaddr.sa_data, AXLEN) && !*config->dev)
+			{
+				strcpy(config->dev, ifr.ifr_name);
+				ioctl(fd, SIOCGIFADDR, &ifr);
+				config->ip = ((struct sockaddr_in *) &ifr.ifr_addr)->sin_addr.s_addr;
+				strcpy(ifr.ifr_name, config->dev);
+				ioctl(fd, SIOCGIFNETMASK, &ifr);
+				config->netmask = ((struct sockaddr_in *) &ifr.ifr_netmask)->sin_addr.s_addr;
+				break;
+			}
+	}
+	close(fd);
+
+	config = cfg = Config;
+
+	while(config)
+	{
+		if (!*config->dev)
+		{
+			if (config == Config)
+			{
+				Config = config->next;
+				cfg = Config;
+			} else
+				cfg->next = config->next;
+			ncfg = config->next;
+			free(config);
+			config = ncfg;
+		} else {
+			cfg = config;
+			config = config->next;
+		}
+	}
+}
+
+void load_listeners(void)
+{
+	config *config;
+	char buf[1024], device[14], call[10], dcall[10];
+	int k;
+	FILE *fp;
+	ax25_address *axcall;
+
+	
+	fp = fopen(PROC_AX25_FILE, "r");
+	
+	if (fp == NULL)
+	{
+		fprintf(stderr, "No AX.25 in kernel. Tss, tss...\n");
+		exit(1);
+	}
+	
+	while (fgets(buf, sizeof(buf)-1, fp) != NULL)
+	{
+		k = sscanf(buf, "%s %s %s", dcall, call, device);
+		if (k == 3 && !strcmp(dcall, "*"))
+		{
+			axcall = asc2ax(call);
+			if (!strcmp("???", device))
+			{
+				for (config = Config; config; config = config->next)
+				{
+					if (call_is_mycall(config, axcall) || config->nmycalls > AX25_MAXCALLS)
+						continue;
+					memcpy(&config->mycalls[config->nmycalls++], axcall, AXLEN);
+				}
+			} else {
+				config = dev_get_config(device);
+				if (config == NULL || call_is_mycall(config, axcall) || config->nmycalls > AX25_MAXCALLS)
+					continue;
+	
+				memcpy(&config->mycalls[config->nmycalls++], axcall, AXLEN);
+			}
+		}
+	}
+	fclose(fp);
+}
+
+void load_config()
+{
+	FILE *fp;
+	char buf[1024], *p, *cmd, *arg;
+	config *config, *cfg;
+	ax25_address *axcall;
+	
+	config = NULL;
+	
+	fp = fopen(CONF_AX25ROUTED_FILE, "r");
+	
+	if (fp == NULL)
+	{
+		fprintf(stderr, "config file %s not found\n", CONF_AX25ROUTED_FILE);
+		exit(1);
+	}
+	
+	while(fgets(buf, sizeof(buf)-1, fp) != NULL)
+	{
+		p = prepare_cmdline(buf);
+		if (!*p)
+			continue;
+
+		cmd = get_next_arg(&p);
+		if (cmd == NULL)
+			continue;
+		arg = get_next_arg(&p);
+		
+		if (*cmd == '[')
+		{
+			cmd++;
+			p = strrchr(cmd, ']');
+			if (p == NULL)
+			{
+				fprintf(stderr, "syntax error: [%s\n", cmd);
+				continue;
+			}
+			*p = '\0';
+			
+			axcall = get_mycall(cmd);
+			if (axcall == NULL)
+				continue;
+			
+			cfg = (struct config_ *) malloc(sizeof(struct config_));
+			if (cfg == NULL)
+			{
+				fprintf(stderr, "out of memory\n");
+				exit(1);
+			}
+			memset(cfg, 0, sizeof(struct config_));
+			
+			if (config)
+				config->next = cfg;
+			else
+				Config = cfg;
+				
+			cfg->next = NULL;
+			config = cfg;
+			strcpy(config->port, cmd);
+			memcpy(&config->mycalls[0], axcall, AXLEN);
+			config->nmycalls = 1;
+		} else
+		if (config && !strcmp(cmd, "ax25-learn-routes"))
+		{	
+		/* ax25-learn-routes no|yes: learn digipeater path */
+			if (arg)
+			{
+				int k = yesno(arg);
+
+				if (k == -1)
+				{
+					invalid_arg(cmd, arg);
+					continue;
+				} else {
+					config->ax25_add_route = k;
+				}
+			} else
+				missing_arg(cmd);
+		} else
+		if (config && !strcmp(cmd, "ax25-learn-only-mine"))
+		{	
+		/* ax25-learn-only-mine no|yes: learn only if addressed to me */
+			if (arg)
+			{
+				int k = yesno(arg);
+
+				if (k == -1)
+				{
+					invalid_arg(cmd, arg);
+					continue;
+				} else {
+					config->ax25_for_me = k;
+				}
+			} else
+				missing_arg(cmd);
+		} else
+		if (config && !strcmp(cmd, "ax25-add-path"))
+		{	
+		/* ax25-add-path [no|<digis>]: add digis if digi-less frame rvd */
+			int k = 0;
+			if (!arg || (arg && yesno(arg) == 0))
+				continue;
+
+			config->ax25_add_default = 1;
+			while (arg && k < AX25_MAX_DIGIS)
+			{
+				memcpy(&config->ax25_default_path.fsa_digipeater[k], asc2ax(arg), AXLEN);
+				arg = get_next_arg(&p);
+				k++;
+			}
+			config->ax25_default_path.fsa_ax25.sax25_ndigis = k;
+		} else
+		if (config && !strcmp(cmd, "ax25-more-mycalls"))
+		{
+		/* ax25-more-mycalls call1 call2: frames to this calls are for "me", too. */
+			if (arg)
+			{
+				while(arg && config->nmycalls < AX25_MAXCALLS)
+				{
+					axcall = asc2ax(arg);
+					if (call_is_mycall(config, axcall))
+						continue;
+					memcpy(&config->mycalls[config->nmycalls++], axcall, AXLEN);
+					arg = get_next_arg(&p);
+				}
+			} else
+				missing_arg(cmd);
+		} else
+		if (config && !strcmp(cmd, "ip-learn-routes"))
+		{
+		/* ip-learn-routes no|yes: learn ip routes */
+			if (arg)
+			{
+				int k = yesno(arg);
+				
+				if (k == -1)
+				{
+					invalid_arg(cmd, arg);
+					continue;
+				} else {
+					config->ip_add_route = k;
+				}
+			} else
+				missing_arg(cmd);
+		} else
+		if (config && !strcmp(cmd, "irtt"))
+		{
+		/* irtt <irtt>: new routes will get this IRTT in msec */
+			if (arg)
+			{
+				int k = atoi(arg);
+
+				if (k == 0)
+				{
+					invalid_arg(cmd, arg);
+					continue;
+				} else {
+					config->tcp_irtt = k;
+				}
+			} else
+				missing_arg(cmd);
+		} else
+		if (config && !strcmp(cmd, "dg-mtu"))
+		{
+		/* dg-mtu <mtu>: MTU for datagram mode routes (unused) */
+			if (arg)
+			{
+				int k = atoi(arg);
+
+				if (k == 0)
+				{
+					invalid_arg(cmd, arg);
+					continue;
+				} else {
+					config->dg_mtu = k;
+				}
+			} else
+				missing_arg(cmd);
+		} else
+			if (config && !strcmp(cmd, "vc-mtu"))
+			{
+			/* vc-mtu <mtu>: MTU for virtual connect mode routes (unused) */
+				if (arg)
+				{
+					int k = atoi(arg);
+
+					if (k == 0)
+					{
+						invalid_arg(cmd, arg);
+						continue;
+					} else {
+						config->vc_mtu = k;
+				}
+			} else
+				missing_arg(cmd);
+		} else
+		if (config && !strcmp(cmd, "ip-adjust-mode"))
+		{
+		/* ip-adjust-mode no|yes: adjust ip-mode? (dg or vc) */
+			if (arg)
+			{
+				int k = yesno(arg);
+			
+				if (k == -1)
+				{
+					invalid_arg(cmd, arg);
+					continue;
+				} else {
+					config->ip_adjust_mode = k;
+				}
+			} else
+				missing_arg(cmd);
+		} else
+		if (config && !strcmp(cmd, "arp-add"))
+		{
+		/* arp-add no|yes: adjust arp table? */
+			if (arg)
+			{
+				int k = yesno(arg);
+				
+				if (k == -1)
+				{
+					invalid_arg(cmd, arg);
+					continue;
+				} else {
+					config->ip_add_arp = k;
+				}
+			} else
+				missing_arg(cmd);
+		} else
+		if (!strcmp(cmd, "ax25-maxroutes"))
+		{
+			if (arg)
+				ax25_maxroutes = atoi(arg);
+			else
+				missing_arg(cmd);
+		} else
+		if (!strcmp(cmd, "ip-maxroutes"))
+		{
+			if (arg)
+				ax25_maxroutes = atoi(arg);
+			else
+				missing_arg(cmd);
+				
+		} else
+			fprintf(stderr, "invalid command %s\n", cmd);
+	}
+	fclose(fp);
+	
+	load_ports();
+	load_listeners();
+	
+	reload = 0;
+}
+
+void reload_config(void)
+{
+	config *cfg, *config = Config;
+	
+	while(config)
+	{
+		cfg = config->next;
+		free(config);
+		config = cfg;
+	}
+	Config = NULL;
+
+	load_config();
+}
+
+
+/* commands:
+   ---------
+   
+   add ax25 <callsign> <dev> <time> [<digipeater>]	# Add an AX.25 route
+   add ip   <ip> <dev> <time> <call> <mode>		# Add an IP route & mode
+   del ax25 <callsign> <dev>				# Remove an AX.25 route (from cache)
+   del ip   <ip>					# Remove an IP route (from cache)
+   list [ax25|ip]					# List cache entries
+   reload						# Reload config
+   save							# Save cache
+   expire <minutes>					# Expire cache entries
+   shutdown						# Save cache and exit
+   
+   There's a difference between 'list heard' and 'heard':
+   
+   The 'list' commands will output the symbolic port names as defined in 
+   /usr/local/etc/axports (i.e. 9k6 for scc3), while 'heard' shows the 
+   'real' network device name (i.e. scc3). All commands accept either the
+   port or the network device name. The expample
+   
+   add ax25 dl0tha scc3 0 db0pra
+   
+   is equivalent to
+   
+   add ax25 dl0tha 9k6 0 dbpra
+   
+   Note that in conflicting cases the network device name has precedence
+   over the port name.
+*/
+
+
+void interpret_command(int fd, unsigned char *buf)
+{
+	char *p, *cmd, *arg, *arg2, *dev, *time;
+	ax25_address digipeater[AX25_MAX_DIGIS];
+	ax25_rt_entry *ax25rt;
+	int ndigi, ipmode, action;
+	time_t stamp;
+	config *config;
+	long ip;
+
+	p = prepare_cmdline(buf);
+	
+	if (!*p) return;
+		
+	cmd = get_next_arg(&p);
+	arg = get_next_arg(&p);
+	
+	if (!strcmp(cmd, "add"))
+	{
+		if (arg == NULL)
+			return;
+		if ((arg2 = get_next_arg(&p)) == NULL)
+			return;
+		if ( (dev = get_next_arg(&p)) == NULL)
+			return;
+		if ( (time = get_next_arg(&p)) == NULL)
+			return;
+		if ( (config = dev_get_config(dev)) == NULL) 
+			return;
+
+		sscanf(time, "%lx", &stamp);
+
+		if (!strcmp(arg, "ax25"))
+		{
+			ndigi = 0;
+			arg = get_next_arg(&p);
+
+			while (arg != NULL)
+			{
+				memcpy(&digipeater[ndigi++], asc2ax(arg), AXLEN);
+				if (ndigi == AX25_MAX_DIGIS)
+					break;
+				arg = get_next_arg(&p);
+			}
+
+			ax25rt = update_ax25_route(config, asc2ax(arg2), ndigi, digipeater, stamp);
+			if (ax25rt != NULL)
+				set_ax25_route(config, ax25rt);
+		} else
+		if (!strcmp(arg, "ip"))
+		{
+			ip = asc2ip(arg2);
+			
+			if ((arg2 = get_next_arg(&p)) == NULL)
+				return;
+
+			if ((arg = get_next_arg(&p)) == NULL)
+				return;
+			
+			if (*arg == 'x')
+				return;
+				
+			ipmode = (*arg == 'v');
+
+			action = update_ip_route(config, ip, ipmode, asc2ax(arg2), stamp);
+
+			if (action & NEW_ROUTE)
+				if (set_route(config, ip))
+					return;
+
+			if (action & NEW_ARP)
+				if (set_arp(config, ip, asc2ax(arg2)))
+					return;
+					
+			if (action & NEW_IPMODE)
+				if (set_ipmode(config, asc2ax(arg2), ipmode))
+					return;
+		}
+	} else if (!strcmp(cmd, "del"))
+	{
+		if (arg == NULL)
+			return;
+		arg2 = get_next_arg(&p);
+		if (arg2 == NULL)
+			return;
+		
+		if (!strcmp(arg, "ax25"))
+		{
+			arg = get_next_arg(&p);
+			if (arg == NULL || (config = dev_get_config(arg)) == NULL)
+				return;
+			del_ax25_route(config, asc2ax(arg2));
+		} else 
+		if (!strcmp(arg, "ip"))
+		{
+			del_ip_route(asc2ip(arg2));
+		}
+	} else if (!strcmp(cmd, "expire"))
+	{
+		if (arg == NULL)
+			return;
+		sscanf(arg, "%ld", &stamp);
+		if (stamp != 0)
+		{
+			stamp*=60;
+			expire_ax25_route(stamp);
+			expire_ip_route(stamp);
+		}
+	} else if (!strcmp(cmd, "reload"))
+	{
+		reload_config();
+	} else if (!strcmp(cmd, "list"))
+	{
+		if (arg == NULL)
+			return;
+		
+		if (!strcmp(arg, "ax25"))
+			dump_ax25_routes(fd, 0);
+		else
+		if (!strcmp(arg, "ip"))
+			dump_ip_routes(fd, 0);
+	} else if (!strcmp(cmd, "shutdown"))
+	{
+		save_cache();
+		daemon_shutdown(0);
+	} else if (!strcmp(cmd, "save"))
+	{
+		save_cache();
+	} else if (!strcmp(cmd, "version"))
+	{
+		char buf[256];
+		sprintf(buf, "%s\n", Version);
+		write(fd, buf, strlen(buf));
+	} else if (!strcmp(cmd, "quit"))
+	{
+		close(fd);
+	}
+}
+
+void load_cache(void)
+{
+	FILE *fp;
+	char buf[512];
+	
+	fp = fopen(DATA_AX25ROUTED_AXRT_FILE, "r");
+	if (fp != NULL)
+	{
+		while(fgets(buf, sizeof(buf), fp) != NULL)
+			interpret_command(2, buf);
+	}
+	fclose(fp);
+	
+	fp = fopen(DATA_AX25ROUTED_IPRT_FILE, "r");
+	if (fp != NULL)
+	{
+		while(fgets(buf, sizeof(buf), fp) != NULL)
+			interpret_command(2, buf);
+	}
+	fclose(fp);
+}
+
+void save_cache(void)
+{
+	int fd;
+	
+	fd = creat(DATA_AX25ROUTED_AXRT_FILE, 0664);
+	dump_ax25_routes(fd, 1);
+	close(fd);
+
+	fd = creat(DATA_AX25ROUTED_IPRT_FILE, 0664);
+	dump_ip_routes(fd, 1);
+	close(fd);
+
+}
-- 
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