diff options
Diffstat (limited to 'usr.sbin/dhcpd/pfutils.c')
| -rw-r--r-- | usr.sbin/dhcpd/pfutils.c | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/usr.sbin/dhcpd/pfutils.c b/usr.sbin/dhcpd/pfutils.c index d1fea6cdfdc..15b06c8138c 100644 --- a/usr.sbin/dhcpd/pfutils.c +++ b/usr.sbin/dhcpd/pfutils.c @@ -1,4 +1,4 @@ -/* $OpenBSD: pfutils.c,v 1.3 2006/06/14 14:44:39 ckuethe Exp $ */ +/* $OpenBSD: pfutils.c,v 1.4 2006/06/14 14:49:46 ckuethe Exp $ */ /* * Copyright (c) 2006 Chris Kuethe <ckuethe@openbsd.org> * @@ -40,6 +40,7 @@ extern struct passwd *pw; extern int pfpipe[2]; +extern int gotpipe; extern char *abandoned_tab; extern char *changedmac_tab; @@ -184,3 +185,41 @@ atomicio(ssize_t (*f) (int, void *, size_t), int fd, void *_s, size_t n) } return (pos); } + +/* + * This function sends commands to the pf table handler. It will safely and + * silently return if the handler is unconfigured, therefore it can be called + * on all interesting lease events, whether or not the user actually wants to + * use the pf table feature. + */ +void +pfmsg(char c, struct lease *lp) +{ + struct pf_cmd cmd; + + if (gotpipe == 0) + return; + + cmd.type = c; + bcopy(lp->ip_addr.iabuf, &cmd.ip.s_addr, 4); + + switch(c){ + case 'A': /* address is being abandoned */ + if (abandoned_tab != NULL) + (void)atomicio(vwrite, pfpipe[1], &cmd, + sizeof(struct pf_cmd)); + break; + case 'C': /* IP moved to different ethernet address */ + if (changedmac_tab != NULL) + (void)atomicio(vwrite, pfpipe[1], &cmd, + sizeof(struct pf_cmd)); + break; + case 'L': /* Address is being leased (unabandoned) */ + if (abandoned_tab != NULL) + (void)atomicio(vwrite, pfpipe[1], &cmd, + sizeof(struct pf_cmd)); + break; + default: /* silently ignore unknown commands */ + break; + } +} |