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- Fix my braino in the 220835, when I used strtok(). It isn't

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applicable here, since modifies the string. Switch to strchr().
- Restore support for undocumented optional parameters of
  redir_port and redir_proto, that were disabled in 220835.
- While here, change !isalpha() checks on optinal parameters
  for isdigit().

Submitted by:	Alexander V. Chernikov <melifaro ipfw.ru>
PR:		kern/143653
This commit is contained in:
Gleb Smirnoff 2011-06-17 12:12:52 +00:00
parent f5f215e251
commit ce97208218
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=223185
1 changed files with 32 additions and 14 deletions
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46
sbin/ipfw/nat.c
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@ -315,14 +315,19 @@ static int
estimate_redir_addr(int *ac, char ***av)
{
size_t space = sizeof(struct cfg_redir);
char *sep;
char *sep = **av;
u_int c = 0;
if ((sep = strtok(**av, ",")) != NULL) {
space += sizeof(struct cfg_spool);
while ((sep = strtok(NULL, ",")) != NULL)
space += sizeof(struct cfg_spool);
while ((sep = strchr(sep, ',')) != NULL) {
c++;
sep++;
}
if (c > 0)
c++;
space += c * sizeof(struct cfg_spool);
return (space);
}
@ -370,14 +375,19 @@ static int
estimate_redir_port(int *ac, char ***av)
{
size_t space = sizeof(struct cfg_redir);
char *sep;
char *sep = **av;
u_int c = 0;
if ((sep = strtok(**av, ",")) != NULL) {
space += sizeof(struct cfg_spool);
while ((sep = strtok(NULL, ",")) != NULL)
space += sizeof(struct cfg_spool);
while ((sep = strchr(sep, ',')) != NULL) {
c++;
sep++;
}
if (c > 0)
c++;
space += c * sizeof(struct cfg_spool);
return (space);
}
@ -465,10 +475,10 @@ setup_redir_port(char *buf, int *ac, char ***av)
* Extract remote address and optionally port.
*/
/*
* NB: isalpha(**av) => we've to check that next parameter is really an
* NB: isdigit(**av) => we've to check that next parameter is really an
* option for this redirect entry, else stop here processing arg[cv].
*/
if (*ac != 0 && !isalpha(***av)) {
if (*ac != 0 && isdigit(***av)) {
if ((sep = strchr(**av, ':')) != NULL) {
if (StrToAddrAndPortRange(**av, &r->raddr, protoName,
&portRange) != 0)
@ -584,7 +594,7 @@ setup_redir_proto(char *buf, int *ac, char ***av)
r->raddr.s_addr = INADDR_ANY;
} else {
/* see above in setup_redir_port() */
if (!isalpha(***av)) {
if (isdigit(***av)) {
StrToAddr(**av, &r->paddr);
(*av)++; (*ac)--;
@ -592,7 +602,7 @@ setup_redir_proto(char *buf, int *ac, char ***av)
* Extract optional remote address.
*/
/* see above in setup_redir_port() */
if (*ac != 0 && !isalpha(***av)) {
if (*ac != 0 && isdigit(***av)) {
StrToAddr(**av, &r->raddr);
(*av)++; (*ac)--;
}
@ -774,6 +784,9 @@ ipfw_config_nat(int ac, char **av)
av1++; ac1--;
len += estimate_redir_port(&ac1, &av1);
av1 += 2; ac1 -= 2;
/* Skip optional remoteIP/port */
if (ac1 != 0 && isdigit(**av1))
av1++; ac1--;
break;
case TOK_REDIR_PROTO:
if (ac1 < 2)
@ -781,6 +794,11 @@ ipfw_config_nat(int ac, char **av)
"not enough arguments");
len += sizeof(struct cfg_redir);
av1 += 2; ac1 -= 2;
/* Skip optional remoteIP/port */
if (ac1 != 0 && isdigit(**av1))
av1++; ac1--;
if (ac1 != 0 && isdigit(**av1))
av1++; ac1--;
break;
default:
errx(EX_DATAERR, "unrecognised option ``%s''", av1[-1]);