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Ok..so everybody picking on me that ipfw syntacs

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is a pain in ...wel.. trying to fix this
 * from/to/via position indepenndant syntax
 * "any" for 0/0 host address
 * addf/addb default keyword in case you skip it..
 * pass = accept new action, seems to be somewhat better
   in particular cases
 * on = via (as on ed0 instead of via ed0,loook at
   reject tcp on ed0 from hacker )
This commit is contained in:
Ugen J.S. Antsilevich 1995-03-03 12:28:34 +00:00
parent dc463a367e
commit 9071ec3796
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=6852
1 changed files with 177 additions and 111 deletions
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288
sbin/ipfw/ipfw.c
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@ -45,13 +45,15 @@ int ports_ok=0; /* flag allowing ports */
u_short flags=0; /* New entry flags */
#define FW 1 /* Firewall action */
#define AC 2 /* Accounting action */
#define FW 0x001 /* Firewall action */
#define AC 0x002 /* Accounting action */
#define S_ANY "any"
#define S_SEP1 "fr" /* of "from" */
#define S_SEP2 "to" /* of "to" */
#define S_SEP3 "vi" /* of "via" */
#define IS_TO(x) (!strcmp(x,"to"))
#define IS_FROM(x) (!strcmp(x,"from"))
#define IS_VIA(x) (!strcmp(x,"via") || !strcmp(x,"on"))
#define IS_TOKEN(x) (IS_TO(x) || IS_FROM(x) || IS_VIA(x))
#define P_AC "a" /* of "accept" for policy action */
#define P_DE "d" /* of "deny" for policy action */
@ -86,24 +88,26 @@ char action_tab[][MAXSTR]={
char type_tab[][MAXSTR]={
"ac",
"acc",
#define T_ACCEPT 0
"lo",
#define T_LOG 1
"r",
#define T_REJECT 2
"lr",
#define T_LREJECT 3
"d",
#define T_DENY 4
"ld",
#define T_LDENY 5
"si",
#define T_SINGLE 6
"bi",
#define T_BIDIR 7
"pas",
#define T_PASS 1
"log",
#define T_LOG 2
"rej",
#define T_REJECT 3
"lrej",
#define T_LREJECT 4
"den",
#define T_DENY 5
"lden",
#define T_LDENY 6
"sin",
#define T_SINGLE 7
"bid",
#define T_BIDIR 8
"",
#define T_NONE 8
#define T_NONE 9
};
@ -430,9 +434,14 @@ return i;
void show_usage()
void show_usage(str)
char *str;
{
printf("%s: bad arguments\n",progname);
if (str)
fprintf(stderr,"%s: ERROR - %s\n",progname,str);
else
fprintf(stderr,"%s: ERROR - bad arguments\n",progname);
fprintf(stderr,"See man %s(8) for proper usage.\n",progname);
}
@ -542,6 +551,13 @@ char *sm_bit,*sm_oct,*end;
int n_bit;
struct hostent *hptr;
if (!strncmp(str,S_ANY,strlen(S_ANY))) {
addr->s_addr=0L;
mask->s_addr=0L;
return;
}
if (mask) {
(void)strtok(str,"/");
sm_bit=strtok(NULL,"");
@ -575,11 +591,11 @@ struct hostent *hptr;
if (sm_bit) {
n_bit = strtol(sm_bit,&end,10);
if (*end!='\0') {
show_usage();
show_usage(NULL);
exit(1);
}
if (n_bit<0 || n_bit>sizeof(u_long)*CHAR_BIT) {
show_usage();
show_usage(NULL);
exit(1);
}
if (n_bit>0)
@ -591,7 +607,7 @@ struct hostent *hptr;
if (sm_oct) {
if (!inet_aton(sm_oct,mask)) {
show_usage();
show_usage(NULL);
exit(1);
}
}
@ -613,16 +629,22 @@ short unit;
int i;
i=0; sptr=str;
while(isalpha(*sptr++))
while(isalpha(*sptr++)) {
i++;
}
*sptr--;
if (i==0)
return 1;
strncpy(name,str,i);
name[i]='\0';
unit=(short)atoi(sptr);
sprintf(buf,"%s%d",name,unit);
printf("%s %s\n",buf,str);
if (strcmp(str,buf))
return 1;
@ -637,97 +659,127 @@ void set_entry(av,frwl)
char **av;
struct ip_fw * frwl;
{
int p_num=0,ir=0;
int ir;
int got_from=0,got_to=0,got_via=0;
#define T_FROM 1
#define T_TO 2
#define T_VIA 3
int token;
/*
* This section actually creates
* generic entry which matches everything
* in this sorry world...
*/
frwl->fw_nsp=0;
frwl->fw_ndp=0;
frwl->fw_via_ip.s_addr=0L;
frwl->fw_src.s_addr=0L;
frwl->fw_dst.s_addr=0L;
frwl->fw_smsk.s_addr=0L;
frwl->fw_dmsk.s_addr=0L;
if (strncmp(*av,S_SEP1,strlen(S_SEP1))) {
show_usage();
exit(1);
get_next:
token = 0;
if (IS_FROM(*av)) {
token = T_FROM;
if (got_from) {
show_usage("Redefined 'from'.");
exit(1);
}
if (*(++av)==NULL) {
show_usage("Missing 'from' specification.");
exit(1);
}
set_entry_ip(*av,&(frwl->fw_src),&(frwl->fw_smsk));
got_from=1;
}
if (IS_TO(*av)) {
token = T_TO;
if (got_to) {
show_usage("Redefined 'to'.");
exit(1);
}
if (*(++av)==NULL) {
show_usage("Missing 'to' specification.");
exit(1);
}
set_entry_ip(*av,&(frwl->fw_dst),&(frwl->fw_dmsk));
got_to = 1;
}
if (IS_VIA(*av)) {
token = T_VIA;
if (got_via) {
show_usage("Redefined 'via'.");
exit(1);
}
if (*(++av)==NULL) {
show_usage("Missing 'via' specification.");
exit(1);
}
/*
* Try first to set interface name
* from arguments.set_entry_ip() will exit on
* wrong argument.
*/
if (set_entry_ifname(*av,frwl))
set_entry_ip(*av,&(frwl->fw_via_ip),NULL);
else
flags |= IP_FW_F_IFNAME;
got_via = 1;
}
if (*(++av)==NULL) {
show_usage();
exit(1);
return;
}
set_entry_ip(*av,&(frwl->fw_src),&(frwl->fw_smsk));
if (IS_TOKEN(*av))
goto get_next;
if (*(++av)==NULL) {
show_usage();
exit(1);
}
if (!strncmp(*av,S_SEP2,strlen(S_SEP2)))
goto no_src_ports;
if (ports_ok) {
if (ports_ok && token == T_FROM) {
ir = 0;
frwl->fw_nsp=
set_entry_ports(*av,frwl->fw_pts,IP_FW_MAX_PORTS,&ir);
if (ir)
flags|=IP_FW_F_SRNG;
if (*(++av)==NULL) {
show_usage();
exit(1);
return;
}
}
no_src_ports:
if (strncmp(*av,S_SEP2,strlen(S_SEP2))) {
show_usage();
exit(1);
}
if (*(++av)==NULL) {
show_usage();
exit(1);
}
set_entry_ip(*av,&(frwl->fw_dst),&(frwl->fw_dmsk));
if (*(++av)==NULL)
goto no_tail;
if (!strncmp(*av,S_SEP3,strlen(S_SEP3)))
goto no_dst_ports;
if (ports_ok) {
if (ports_ok && token == T_TO) {
ir = 0;
frwl->fw_ndp=
set_entry_ports(*av,&(frwl->fw_pts[frwl->fw_nsp]),
(IP_FW_MAX_PORTS-frwl->fw_nsp),&ir);
if (ir)
flags|=IP_FW_F_DRNG;
if (*(++av)==NULL) {
return;
}
}
if (*(++av)==NULL)
goto no_tail;
no_dst_ports:
if (strncmp(*av,S_SEP3,strlen(S_SEP3))) {
show_usage();
if (token == 0) {
show_usage("Unknown token.");
exit(1);
}
if (*(++av)==NULL) {
show_usage();
exit(1);
}
/*
* Try first to set interface name
* from arguments.set_entry_ip() will exit on
* wrong argument.
*/
if (set_entry_ifname(*av,frwl))
set_entry_ip(*av,&(frwl->fw_via_ip),NULL);
else
flags |= IP_FW_F_IFNAME;
no_tail:
goto get_next;
}
@ -842,7 +894,7 @@ char **av;
char ch;
extern int optind;
int ctl,int_t,is_check=0;
int ctl,int_t,is_check=0,int_notdef=0;
struct ip_fw frwl;
strcpy(progname,*av);
@ -853,7 +905,7 @@ struct ip_fw frwl;
exit(1);
}
if ( ac == 1 ) {
show_usage();
show_usage(NULL);
exit(1);
}
@ -870,12 +922,12 @@ struct ip_fw frwl;
break;
case '?':
default:
show_usage();
show_usage(NULL);
exit(1);
}
if (*(av+=optind)==NULL) {
show_usage();
show_usage(NULL);
exit(1);
}
@ -917,70 +969,84 @@ struct ip_fw frwl;
policy(++av);
exit(0); /* we never get here */
default:
show_usage();
exit(1);
int_t=(AC|FW);
int_notdef=1;
} /* main action switch */
if (is_check)
goto proto_switch;
if (*(++av)==NULL) {
show_usage();
if (!int_notdef)
if (*(++av)==NULL) {
show_usage(NULL);
exit(1);
}
}
switch(get_num(*av,type_tab)) {
case T_LREJECT:
flags|=IP_FW_F_PRN;
case T_REJECT:
flags|=IP_FW_F_ICMPRPL;
if (int_t!=FW) {
show_usage();
if (!int_t&FW) {
show_usage(NULL);
exit(1);
}
int_t=FW;
break;
case T_LDENY:
flags|=IP_FW_F_PRN;
case T_DENY:
flags|=0; /* just to show it related to flags */
if (int_t!=FW) {
show_usage();
if (!int_t&FW) {
show_usage(NULL);
exit(1);
}
int_t=FW;
break;
case T_LOG:
flags|=IP_FW_F_PRN;
case T_ACCEPT:
case T_PASS:
flags|=IP_FW_F_ACCEPT;
if (int_t!=FW) {
show_usage();
if (!int_t&FW) {
show_usage(NULL);
exit(1);
}
int_t=FW;
break;
case T_SINGLE:
flags|=0; /* just to show it related to flags */
if (int_t!=AC) {
show_usage();
if (!int_t&AC) {
show_usage(NULL);
exit(1);
}
int_t=AC;
break;
case T_BIDIR:
flags|=IP_FW_F_BIDIR;
if (int_t!=AC) {
show_usage();
if (!int_t&AC) {
show_usage(NULL);
exit(1);
}
int_t=AC;
break;
default:
show_usage();
show_usage(NULL);
exit(1);
} /* type of switch */
if (int_notdef) {
if (int_t==FW)
ctl=IP_FW_ADD;
if (int_t==AC)
ctl=IP_ACCT_ADD;
}
proto_switch:
if (*(++av)==NULL) {
show_usage();
show_usage(NULL);
exit(1);
}
@ -1004,12 +1070,12 @@ struct ip_fw frwl;
strcpy(proto_name,"udp");
break;
default:
show_usage();
show_usage(NULL);
exit(1);
}
if (*(++av)==NULL) {
show_usage();
show_usage(NULL);
exit(1);
}