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-rw-r--r--toys/net/ifconfig.c43
1 files changed, 24 insertions, 19 deletions
diff --git a/toys/net/ifconfig.c b/toys/net/ifconfig.c
index fe58b653..74779c54 100644
--- a/toys/net/ifconfig.c
+++ b/toys/net/ifconfig.c
@@ -5,6 +5,11 @@
* Reviewed by Kyungsu Kim <kaspyx@gmail.com>
*
* Not in SUSv4.
+ *
+ * Obsolete fields included for historical purposes:
+ * irq|io_addr|mem_start ADDR - micromanage obsolete hardware
+ * outfill|keepalive INTEGER - SLIP analog dialup line quality monitoring
+ * metric INTEGER - added to Linux 0.9.10 with comment "never used", still true
USE_IFCONFIG(NEWTOY(ifconfig, "^?a", TOYFLAG_SBIN))
@@ -21,29 +26,28 @@ config IFCONFIG
-a Show all interfaces, not just active ones
- Additional arguments are actions to perform on the interface:
+ Standard ACTIONs to perform on an INTERFACE:
+
+ ADDR[/MASK] - set IPv4 address (1.2.3.4/5) and activate interface
+ add|del ADDR[/LEN] - add/remove IPv6 address (1111::8888/128)
+ up|down - activate or deactivate interface
- ADDRESS[/NETMASK] - set IPv4 address (1.2.3.4/5)
- default - unset ipv4 address
- add|del ADDRESS[/PREFIXLEN] - add/remove IPv6 address (1111::8888/128)
- up - enable interface
- down - disable interface
+ Advanced ACTIONs (default values usually suffice):
- netmask|broadcast|pointopoint ADDRESS - set more IPv4 characteristics
- hw ether|infiniband ADDRESS - set LAN hardware address (AA:BB:CC...)
- txqueuelen LEN - number of buffered packets before output blocks
- mtu LEN - size of outgoing packets (Maximum Transmission Unit)
+ default - remove IPv4 address
+ netmask ADDR - set IPv4 netmask via 255.255.255.0 instead of /24
+ txqueuelen LEN - number of buffered packets before output blocks
+ mtu LEN - size of outgoing packets (Maximum Transmission Unit)
+ broadcast ADDR - Set broadcast address
+ pointopoint ADDR - PPP and PPPOE use this instead of "route add default gw"
+ hw TYPE ADDR - set hardware (mac) address (type = ether|infiniband)
Flags you can set on an interface (or -remove by prefixing with -):
- arp - don't use Address Resolution Protocol to map LAN routes
- promisc - don't discard packets that aren't to this LAN hardware address
- multicast - force interface into multicast mode if the driver doesn't
- allmulti - promisc for multicast packets
- Obsolete fields included for historical purposes:
- irq|io_addr|mem_start ADDR - micromanage obsolete hardware
- outfill|keepalive INTEGER - SLIP analog dialup line quality monitoring
- metric INTEGER - added to Linux 0.9.10 with comment "never used", still true
+ arp - don't use Address Resolution Protocol to map LAN routes
+ promisc - don't discard packets that aren't to this LAN hardware address
+ multicast - force interface into multicast mode if the driver doesn't
+ allmulti - promisc for multicast packets
*/
#define FOR_ifconfig
@@ -115,7 +119,7 @@ static void display_ifconfig(char *name, int always, unsigned long long val[])
if (!always && !(flags & IFF_UP)) return;
// query hardware type and hardware address
- i = ioctl(TT.sockfd, SIOCGIFHWADDR, &ifre);
+ xioctl(TT.sockfd, SIOCGIFHWADDR, &ifre);
for (i=0; i < (sizeof(types)/sizeof(*types))-1; i++)
if (ifre.ifr_hwaddr.sa_family == types[i].type) break;
@@ -150,6 +154,7 @@ static void display_ifconfig(char *name, int always, unsigned long long val[])
{"Mask", 0, SIOCGIFNETMASK}
};
+ // TODO: can this be ipv6? Why are we checking here when ipv6 source later?
xprintf("%10c%s", ' ', (si->sin_family == AF_INET) ? "inet" :
(si->sin_family == AF_INET6) ? "inet6" : "unspec");