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- --- a/hosts_access.5
- +++ b/hosts_access.5
- @@ -90,6 +90,9 @@ bitwise AND of the address and the `mask
- pattern `131.155.72.0/255.255.254.0' matches every address in the
- range `131.155.72.0' through `131.155.73.255'.
- .IP \(bu
- +An expression of the form `n.n.n.n/m\' is interpreted as a
- +`net/prefixlen\' pair, as below, for IPv4 addresses.
- +.IP \(bu
- A string that begins with a `/' character is treated as a file
- name. A host name or address is matched if it matches any host name
- or address pattern listed in the named file. The file format is
- --- a/tcpd.h
- +++ b/tcpd.h
- @@ -93,6 +93,7 @@ extern void refuse __P((struct request_i
- extern char *xgets __P((char *, int, FILE *)); /* fgets() on steroids */
- extern char *split_at __P((char *, int)); /* strchr() and split */
- extern unsigned long dot_quad_addr __P((char *)); /* restricted inet_addr() */
- +extern unsigned long prefix_to_netmask __P((char *)); /* 0-32 prefix length */
-
- /* Global variables. */
-
- --- a/misc.c
- +++ b/misc.c
- @@ -14,6 +14,8 @@ static char sccsic[] = "@(#) misc.c 1.2
- #include <arpa/inet.h>
- #include <stdio.h>
- #include <string.h>
- +#include <ctype.h>
- +#include <stdlib.h>
-
- #include "tcpd.h"
-
- @@ -85,3 +87,22 @@ char *str;
- }
- return (runs == 4 ? inet_addr(str) : INADDR_NONE);
- }
- +
- +/* prefix_to_netmask - convert prefix (0-32) to netmask */
- +
- +unsigned long prefix_to_netmask(str)
- +char *str;
- +{
- + unsigned long prefix;
- + char *endptr;
- +
- + if (!isdigit(str[0]))
- + return INADDR_NONE;
- +
- + prefix = strtoul(str, &endptr, 10);
- + if ((endptr == str) || (*endptr != '\0') || (prefix > 32))
- + return INADDR_NONE;
- +
- + return htonl(~0UL << (32 - prefix));
- +}
- +
- --- a/hosts_access.c
- +++ b/hosts_access.c
- @@ -345,7 +345,12 @@ char *string;
- if ((addr = dot_quad_addr(string)) == INADDR_NONE)
- return (NO);
- if ((net = dot_quad_addr(net_tok)) == INADDR_NONE
- - || (mask = dot_quad_addr(mask_tok)) == INADDR_NONE) {
- + || ((mask = dot_quad_addr(mask_tok)) == INADDR_NONE
- + && strcmp(mask_tok, "255.255.255.255")
- + && (mask = prefix_to_netmask(mask_tok)) == INADDR_NONE
- + && strcmp(mask_tok, "32"))) {
- + /* 255.255.255.255 == INADDR_NONE, separate check needed. TJ. */
- + /* 32 == INADDR_NONE, separate check needed. philipp */
- tcpd_warn("bad net/mask expression: %s/%s", net_tok, mask_tok);
- return (NO); /* not tcpd_jump() */
- }
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