diff options
Diffstat (limited to 'usr.sbin/arp/arp.c')
| -rw-r--r-- | usr.sbin/arp/arp.c | 32 |
1 files changed, 20 insertions, 12 deletions
diff --git a/usr.sbin/arp/arp.c b/usr.sbin/arp/arp.c index ee4236b5299b..055ef2ffe225 100644 --- a/usr.sbin/arp/arp.c +++ b/usr.sbin/arp/arp.c @@ -81,7 +81,6 @@ static int get(char *host); static int file(char *name); static struct rt_msghdr *rtmsg(int cmd, struct sockaddr_in *dst, struct sockaddr_dl *sdl); -static int get_ether_addr(in_addr_t ipaddr, struct ether_addr *hwaddr); static int set_rtsock(struct sockaddr_in *dst, struct sockaddr_dl *sdl_m, char *host); @@ -143,7 +142,8 @@ main(int argc, char *argv[]) if (!func) func = F_GET; if (opts.rifname) { - if (func != F_GET && func != F_SET && !(func == F_DELETE && opts.aflag)) + if (func != F_GET && func != F_SET && func != F_REPLACE && + !(func == F_DELETE && opts.aflag)) xo_errx(1, "-i not applicable to this operation"); if ((opts.rifindex = if_nametoindex(opts.rifname)) == 0) { if (errno == ENXIO) @@ -273,7 +273,6 @@ getaddr(char *host) return (&reply); } -int valid_type(int type); /* * Returns true if the type is a valid one for ARP. */ @@ -357,11 +356,14 @@ set(int argc, char **argv) } ea = (struct ether_addr *)LLADDR(&sdl_m); if ((opts.flags & RTF_ANNOUNCE) && !strcmp(eaddr, "auto")) { - if (!get_ether_addr(dst->sin_addr.s_addr, ea)) { + uint32_t ifindex; + if (!get_ifinfo(dst->sin_addr.s_addr, ea, &ifindex)) { xo_warnx("no interface found for %s", - inet_ntoa(dst->sin_addr)); + inet_ntoa(dst->sin_addr)); return (1); } + if (opts.rifindex == 0) + opts.rifindex = ifindex; sdl_m.sdl_alen = ETHER_ADDR_LEN; } else { struct ether_addr *ea1 = ether_aton(eaddr); @@ -375,7 +377,7 @@ set(int argc, char **argv) } } #ifndef WITHOUT_NETLINK - return (set_nl(opts.rifindex, dst, &sdl_m, host)); + return (set_nl(dst, &sdl_m, host)); #else return (set_rtsock(dst, &sdl_m, host)); #endif @@ -522,7 +524,7 @@ delete(char *host) #ifdef WITHOUT_NETLINK return (delete_rtsock(host)); #else - return (delete_nl(0, host)); + return (delete_nl(host)); #endif } @@ -819,11 +821,11 @@ doit: } /* - * get_ether_addr - get the hardware address of an interface on the - * same subnet as ipaddr. + * get_ifinfo - get the hardware address and if_index of an interface + * on the same subnet as ipaddr. */ -static int -get_ether_addr(in_addr_t ipaddr, struct ether_addr *hwaddr) +int +get_ifinfo(in_addr_t ipaddr, struct ether_addr *hwaddr, uint32_t *pifindex) { struct ifaddrs *ifa, *ifd, *ifas = NULL; in_addr_t ina, mask; @@ -862,7 +864,13 @@ get_ether_addr(in_addr_t ipaddr, struct ether_addr *hwaddr) } if (ifa == NULL) goto done; - + if (pifindex != NULL) + *pifindex = if_nametoindex(ifa->ifa_name); + if (hwaddr == NULL) { + /* ether addr is not required */ + retval = ETHER_ADDR_LEN; + goto done; + } /* * Now scan through again looking for a link-level address * for this interface. |