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authorlaforge <laforge>2001-07-23 01:24:22 +0000
committerlaforge <laforge>2001-07-23 01:24:22 +0000
commit24824b73d48ba0590401934597f67b0e982b900d (patch)
tree827f7bb01edc523453e4bc332afea01e3bbdba79
parent72dcd7818b8070d2e2cb62ef1e9786b039bbaad0 (diff)
string_to_number fix
-rw-r--r--include/iptables_common.h5
-rw-r--r--ip6tables.c32
-rw-r--r--iptables.c33
3 files changed, 39 insertions, 31 deletions
diff --git a/include/iptables_common.h b/include/iptables_common.h
index be9c550..dff849e 100644
--- a/include/iptables_common.h
+++ b/include/iptables_common.h
@@ -10,7 +10,10 @@ enum exittype {
extern void exit_printhelp() __attribute__((noreturn));
extern void exit_tryhelp(int) __attribute__((noreturn));
int check_inverse(const char option[], int *invert);
-extern int string_to_number(const char *, int, int);
+extern int string_to_number(const char *,
+ unsigned int,
+ unsigned int,
+ unsigned int *);
extern int iptables_insmod(const char *modname, const char *modprobe);
void exit_error(enum exittype, char *, ...)__attribute__((noreturn,
format(printf,2,3)));
diff --git a/ip6tables.c b/ip6tables.c
index c69dd73..2160950 100644
--- a/ip6tables.c
+++ b/ip6tables.c
@@ -612,7 +612,7 @@ parse_mask(char *mask)
{
static struct in6_addr maskaddr;
struct in6_addr *addrp;
- int bits;
+ unsigned int bits;
if (mask == NULL) {
/* no mask at all defaults to 128 bits */
@@ -621,7 +621,7 @@ parse_mask(char *mask)
}
if ((addrp = numeric_to_addr(mask)) != NULL)
return addrp;
- if ((bits = string_to_number(mask, 0, 128)) == -1)
+ if (string_to_number(mask, 0, 128, &bits) == -1)
exit_error(PARAMETER_PROBLEM,
"invalid mask `%s' specified", mask);
if (bits != 0) {
@@ -713,10 +713,9 @@ find_match(const char *name, enum ip6t_tryload tryload)
static struct ip6tables_match *
find_proto(const char *pname, enum ip6t_tryload tryload, int nolookup)
{
- int proto;
+ unsigned int proto;
- proto = string_to_number(pname, 0, 255);
- if (proto != -1)
+ if (string_to_number(pname, 0, 255, &proto) != -1)
return find_match(proto_to_name(proto, nolookup), tryload);
return find_match(pname, tryload);
@@ -725,9 +724,9 @@ find_proto(const char *pname, enum ip6t_tryload tryload, int nolookup)
static u_int16_t
parse_protocol(const char *s)
{
- int proto = string_to_number(s, 0, 255);
+ unsigned int proto;
- if (proto == -1) {
+ if (string_to_number(s, 0, 255, &proto) == -1) {
struct protoent *pent;
if ((pent = getprotobyname(s)))
@@ -793,9 +792,9 @@ parse_interface(const char *arg, char *vianame, unsigned char *mask)
static int
parse_rulenumber(const char *rule)
{
- int rulenum = string_to_number(rule, 1, INT_MAX);
+ unsigned int rulenum;
- if (rulenum == -1)
+ if (string_to_number(rule, 1, INT_MAX, &rulenum))
exit_error(PARAMETER_PROBLEM,
"Invalid rule number `%s'", rule);
@@ -824,18 +823,21 @@ parse_target(const char *targetname)
}
int
-string_to_number(const char *s, int min, int max)
+string_to_number(const char *s, unsigned int min, unsigned int max,
+ unsigned int *ret)
{
- long number;
+ long number;
char *end;
/* Handle hex, octal, etc. */
- errno = 0;
- number = strtol(s, &end, 0);
+ errno = 0;
+ number = strtol(s, &end, 0);
if (*end == '\0' && end != s) {
/* we parsed a number, let's see if we want this */
- if (errno != ERANGE && min <= number && number <= max)
- return number;
+ if (errno != ERANGE && min <= number && number <= max) {
+ *ret = number;
+ return 0;
+ }
}
return -1;
}
diff --git a/iptables.c b/iptables.c
index e8ac265..55420ab 100644
--- a/iptables.c
+++ b/iptables.c
@@ -250,7 +250,8 @@ dotted_to_addr(const char *dotted)
static struct in_addr addr;
unsigned char *addrp;
char *p, *q;
- int onebyte, i;
+ unsigned int onebyte;
+ int i;
char buf[20];
/* copy dotted string, because we need to modify it */
@@ -263,7 +264,7 @@ dotted_to_addr(const char *dotted)
return (struct in_addr *) NULL;
*q = '\0';
- if ((onebyte = string_to_number(p, 0, 255)) == -1)
+ if (string_to_number(p, 0, 255, &onebyte) == -1)
return (struct in_addr *) NULL;
addrp[i] = (unsigned char) onebyte;
@@ -271,7 +272,7 @@ dotted_to_addr(const char *dotted)
}
/* we've checked 3 bytes, now we check the last one */
- if ((onebyte = string_to_number(p, 0, 255)) == -1)
+ if (string_to_number(p, 0, 255, &onebyte) == -1)
return (struct in_addr *) NULL;
addrp[3] = (unsigned char) onebyte;
@@ -581,7 +582,7 @@ parse_mask(char *mask)
{
static struct in_addr maskaddr;
struct in_addr *addrp;
- int bits;
+ unsigned int bits;
if (mask == NULL) {
/* no mask at all defaults to 32 bits */
@@ -591,7 +592,7 @@ parse_mask(char *mask)
if ((addrp = dotted_to_addr(mask)) != NULL)
/* dotted_to_addr already returns a network byte order addr */
return addrp;
- if ((bits = string_to_number(mask, 0, 32)) == -1)
+ if (string_to_number(mask, 0, 32, &bits) == -1)
exit_error(PARAMETER_PROBLEM,
"invalid mask `%s' specified", mask);
if (bits != 0) {
@@ -677,10 +678,9 @@ find_match(const char *name, enum ipt_tryload tryload)
static struct iptables_match *
find_proto(const char *pname, enum ipt_tryload tryload, int nolookup)
{
- int proto;
+ unsigned int proto;
- proto = string_to_number(pname, 0, 255);
- if (proto != -1)
+ if (string_to_number(pname, 0, 255, &proto) != -1)
return find_match(proto_to_name(proto, nolookup), tryload);
return find_match(pname, tryload);
@@ -689,9 +689,9 @@ find_proto(const char *pname, enum ipt_tryload tryload, int nolookup)
static u_int16_t
parse_protocol(const char *s)
{
- int proto = string_to_number(s, 0, 255);
+ unsigned int proto;
- if (proto == -1) {
+ if (string_to_number(s, 0, 255, &proto) == -1) {
struct protoent *pent;
if ((pent = getprotobyname(s)))
@@ -756,9 +756,9 @@ parse_interface(const char *arg, char *vianame, unsigned char *mask)
static int
parse_rulenumber(const char *rule)
{
- int rulenum = string_to_number(rule, 1, INT_MAX);
+ unsigned int rulenum;
- if (rulenum == -1)
+ if (string_to_number(rule, 1, INT_MAX, &rulenum) == -1)
exit_error(PARAMETER_PROBLEM,
"Invalid rule number `%s'", rule);
@@ -846,7 +846,8 @@ mask_to_dotted(const struct in_addr *mask)
}
int
-string_to_number(const char *s, int min, int max)
+string_to_number(const char *s, unsigned int min, unsigned int max,
+ unsigned int *ret)
{
long number;
char *end;
@@ -856,8 +857,10 @@ string_to_number(const char *s, int min, int max)
number = strtol(s, &end, 0);
if (*end == '\0' && end != s) {
/* we parsed a number, let's see if we want this */
- if (errno != ERANGE && min <= number && number <= max)
- return number;
+ if (errno != ERANGE && min <= number && number <= max) {
+ *ret = number;
+ return 0;
+ }
}
return -1;
}