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[Qemu-devel] Patch for adding custom hardware address in -net user, maca
From: |
James Jarvis |
Subject: |
[Qemu-devel] Patch for adding custom hardware address in -net user, macaddr= |
Date: |
Wed, 21 Jan 2009 09:09:17 +0000 |
User-agent: |
Thunderbird 2.0.0.18 (X11/20081120) |
Dear Qemu-Dev list,
Find attached a patch against the 0.9.1 code base to allow the addition
of a macaddr in -net user mode. This feature is unlikely to be widely
used, but we had a requirement for it when using qemu for testing. The
patch has been tested in i386 mode only.
In the dev tree much code has been moved out of vl.c - not sure how keen
you are to see this patch in there too but it would be a feature
appreciated by some. :-)
Regards,
James Jarvis
Information Services
The University of Edinburgh
--
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.
--- qemu-0.9.1-orig/vl.c 2008-01-06 19:38:42.000000000 +0000
+++ qemu-0.9.1/vl.c 2009-01-19 15:56:32.000000000 +0000
@@ -4729,7 +4729,35 @@
if (get_param_value(buf, sizeof(buf), "hostname", p)) {
pstrcpy(slirp_hostname, sizeof(slirp_hostname), buf);
}
- vlan->nb_host_devs++;
+ /*** BEGIN - Allow mac to be set in NAT ***/
+ NICInfo *nd;
+ uint8_t *macaddr;
+
+ if (nb_nics >= MAX_NICS) {
+ fprintf(stderr, "Too Many NICs\n");
+ return -1;
+ }
+ nd = &nd_table[nb_nics];
+ macaddr = nd->macaddr;
+ macaddr[0] = 0x52;
+ macaddr[1] = 0x54;
+ macaddr[2] = 0x00;
+ macaddr[3] = 0x12;
+ macaddr[4] = 0x34;
+ macaddr[5] = 0x56 + nb_nics;
+
+ if (get_param_value(buf, sizeof(buf), "macaddr", p)) {
+ if (parse_macaddr(macaddr, buf) < 0) {
+ fprintf(stderr, "invalid syntax for ethernet address\n");
+ return -1;
+ }
+ nd->vlan = vlan;
+ nb_nics++;
+ vlan->nb_guest_devs++;
+ }else {
+ /*** END - Allow mac to be set in NAT ***/
+ vlan->nb_host_devs++;
+ }
ret = net_slirp_init(vlan);
} else
#endif
@@ -7547,7 +7575,7 @@
"-net nic[,vlan=n][,macaddr=addr][,model=type]\n"
" create a new Network Interface Card and connect it
to VLAN 'n'\n"
#ifdef CONFIG_SLIRP
- "-net user[,vlan=n][,hostname=host]\n"
+ "-net user[,vlan=n][,macaddr=addr][,hostname=host]\n"
" connect the user mode network stack to VLAN 'n'
and send\n"
" hostname 'host' to DHCP clients\n"
#endif
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