diff options
Diffstat (limited to 'meta/recipes-extended/tcp-wrappers/tcp-wrappers-7.6/11_tcpd_blacklist.patch')
| -rw-r--r-- | meta/recipes-extended/tcp-wrappers/tcp-wrappers-7.6/11_tcpd_blacklist.patch | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/meta/recipes-extended/tcp-wrappers/tcp-wrappers-7.6/11_tcpd_blacklist.patch b/meta/recipes-extended/tcp-wrappers/tcp-wrappers-7.6/11_tcpd_blacklist.patch new file mode 100644 index 0000000000..0238e35208 --- /dev/null +++ b/meta/recipes-extended/tcp-wrappers/tcp-wrappers-7.6/11_tcpd_blacklist.patch @@ -0,0 +1,151 @@ +Path: news.porcupine.org!news.porcupine.org!not-for-mail +From: Wietse Venema <wietse@((no)(spam)(please))wzv.win.tue.nl> +Newsgroups: comp.mail.sendmail,comp.security.unix +Subject: TCP Wrapper Blacklist Extension +Followup-To: poster +Date: 8 Sep 1997 18:53:13 -0400 +Organization: Wietse's hangout while on sabattical in the USA +Lines: 147 +Sender: wietse@spike.porcupine.org +Message-ID: <5v1vkp$h4f$1@spike.porcupine.org> +NNTP-Posting-Host: spike.porcupine.org +Xref: news.porcupine.org comp.mail.sendmail:3541 comp.security.unix:7158 + +The patch below adds a new host pattern to the TCP Wrapper access +control language. Instead of a host name or address pattern, you +can specify an external /file/name with host name or address +patterns. The feature can be used recursively. + +The /file/name extension makes it easy to blacklist bad sites, for +example, to block unwanted electronic mail when libwrap is linked +into sendmail. Adding hosts to a simple text file is much easier +than having to edit a more complex hosts.allow/deny file. + +I developed this a year or so ago as a substitute for NIS netgroups. +At that time, I did not consider it of sufficient interest for +inclusion in the TCP Wrapper distribution. How times have changed. + +The patch is relative to TCP Wrappers version 7.6. The main archive +site is ftp://ftp.win.tue.nl/pub/security/tcp_wrappers_7.6.tar.gz + +Thanks to the Debian LINUX folks for expressing their interest in +this patch. + + Wietse + + +[diff updated by Md] + +diff -ruN tcp_wrappers_7.6.orig/hosts_access.5 tcp_wrappers_7.6/hosts_access.5 +--- tcp_wrappers_7.6.orig/hosts_access.5 2004-04-10 19:28:09.000000000 +0200 ++++ tcp_wrappers_7.6/hosts_access.5 2004-04-10 19:28:01.000000000 +0200 +@@ -97,6 +97,13 @@ + `[3ffe:505:2:1::]/64\' matches every address in the range + `3ffe:505:2:1::\' through `3ffe:505:2:1:ffff:ffff:ffff:ffff\'. + .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 ++zero or more lines with zero or more host name or address patterns ++separated by whitespace. A file name pattern can be used anywhere ++a host name or address pattern can be used. ++.IP \(bu + Wildcards `*\' and `?\' can be used to match hostnames or IP addresses. This + method of matching cannot be used in conjunction with `net/mask\' matching, + hostname matching beginning with `.\' or IP address matching ending with `.\'. +diff -ruN tcp_wrappers_7.6.orig/hosts_access.c tcp_wrappers_7.6/hosts_access.c +--- tcp_wrappers_7.6.orig/hosts_access.c 2004-04-10 19:28:09.000000000 +0200 ++++ tcp_wrappers_7.6/hosts_access.c 2004-04-10 19:27:05.000000000 +0200 +@@ -253,6 +253,26 @@ + } + } + ++/* hostfile_match - look up host patterns from file */ ++ ++static int hostfile_match(path, host) ++char *path; ++struct hosts_info *host; ++{ ++ char tok[BUFSIZ]; ++ int match = NO; ++ FILE *fp; ++ ++ if ((fp = fopen(path, "r")) != 0) { ++ while (fscanf(fp, "%s", tok) == 1 && !(match = host_match(tok, host))) ++ /* void */ ; ++ fclose(fp); ++ } else if (errno != ENOENT) { ++ tcpd_warn("open %s: %m", path); ++ } ++ return (match); ++} ++ + /* host_match - match host name and/or address against pattern */ + + static int host_match(tok, host) +@@ -280,6 +300,8 @@ + tcpd_warn("netgroup support is disabled"); /* not tcpd_jump() */ + return (NO); + #endif ++ } else if (tok[0] == '/') { /* /file hack */ ++ return (hostfile_match(tok, host)); + } else if (STR_EQ(tok, "KNOWN")) { /* check address and name */ + char *name = eval_hostname(host); + return (STR_NE(eval_hostaddr(host), unknown) && HOSTNAME_KNOWN(name)); +diff -ruN tcp_wrappers_7.6.orig/tcpdchk.c tcp_wrappers_7.6/tcpdchk.c +--- tcp_wrappers_7.6.orig/tcpdchk.c 2004-04-10 19:28:09.000000000 +0200 ++++ tcp_wrappers_7.6/tcpdchk.c 2004-04-10 19:27:05.000000000 +0200 +@@ -353,6 +353,8 @@ + { + if (pat[0] == '@') { + tcpd_warn("%s: daemon name begins with \"@\"", pat); ++ } else if (pat[0] == '/') { ++ tcpd_warn("%s: daemon name begins with \"/\"", pat); + } else if (pat[0] == '.') { + tcpd_warn("%s: daemon name begins with dot", pat); + } else if (pat[strlen(pat) - 1] == '.') { +@@ -385,6 +387,8 @@ + { + if (pat[0] == '@') { /* @netgroup */ + tcpd_warn("%s: user name begins with \"@\"", pat); ++ } else if (pat[0] == '/') { ++ tcpd_warn("%s: user name begins with \"/\"", pat); + } else if (pat[0] == '.') { + tcpd_warn("%s: user name begins with dot", pat); + } else if (pat[strlen(pat) - 1] == '.') { +@@ -430,8 +434,13 @@ + static int check_host(pat) + char *pat; + { ++ char buf[BUFSIZ]; + char *mask; + int addr_count = 1; ++ FILE *fp; ++ struct tcpd_context saved_context; ++ char *cp; ++ char *wsp = " \t\r\n"; + + if (pat[0] == '@') { /* @netgroup */ + #ifdef NO_NETGRENT +@@ -450,6 +459,21 @@ + tcpd_warn("netgroup support disabled"); + #endif + #endif ++ } else if (pat[0] == '/') { /* /path/name */ ++ if ((fp = fopen(pat, "r")) != 0) { ++ saved_context = tcpd_context; ++ tcpd_context.file = pat; ++ tcpd_context.line = 0; ++ while (fgets(buf, sizeof(buf), fp)) { ++ tcpd_context.line++; ++ for (cp = strtok(buf, wsp); cp; cp = strtok((char *) 0, wsp)) ++ check_host(cp); ++ } ++ tcpd_context = saved_context; ++ fclose(fp); ++ } else if (errno != ENOENT) { ++ tcpd_warn("open %s: %m", pat); ++ } + } else if (mask = split_at(pat, '/')) { /* network/netmask */ + #ifdef INET6 + int mask_len; |