[PATCH 3/4] slirp: Add mfr-id to -netdev options

[Peter Delevoryas]

This lets you set the manufacturer's ID for a slirp netdev, which can be
queried from the guest through the Get Version ID NC-SI command. For
example, by setting the manufacturer's ID to 0x8119:

    wget 
https://github.com/facebook/openbmc/releases/download/openbmc-e2294ff5d31d/fby35.mtd
    qemu-system-arm -machine fby35-bmc \
        -drive file=fby35.mtd,format=raw,if=mtd -nographic \
        -netdev user,id=nic,mfr-id=0x8119,hostfwd=::2222-:22 \
        -net nic,model=ftgmac100,netdev=nic
    ...
    username: root
    password: 0penBmc
    ...
    root@bmc-oob:~# ncsi-util 0x15
    NC-SI Command Response:
    cmd: GET_VERSION_ID(0x15)
    Response: COMMAND_COMPLETED(0x0000)  Reason: NO_ERROR(0x0000)
    Payload length = 40

    20: 0xf1 0xf0 0xf0 0x00
    24: 0x00 0x00 0x00 0x00
    28: 0x00 0x00 0x00 0x00
    32: 0x00 0x00 0x00 0x00
    36: 0x00 0x00 0x00 0x00
    40: 0x00 0x00 0x00 0x00
    44: 0x00 0x00 0x00 0x00
    48: 0x00 0x00 0x00 0x00
    52: 0x00 0x00 0x81 0x19

Signed-off-by: Peter Delevoryas <p...@fb.com>
---
 net/slirp.c   | 5 +++--
 qapi/net.json | 5 ++++-
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/net/slirp.c b/net/slirp.c
index 75e5ccafd9..231068c1e2 100644
--- a/net/slirp.c
+++ b/net/slirp.c
@@ -413,7 +413,7 @@ static int net_slirp_init(NetClientState *peer, const char 
*model,
                           const char *vnameserver, const char *vnameserver6,
                           const char *smb_export, const char *vsmbserver,
                           const char **dnssearch, const char *vdomainname,
-                          const char *tftp_server_name,
+                          const char *tftp_server_name, uint32_t mfr_id,
                           Error **errp)
 {
     /* default settings according to historic slirp */
@@ -636,6 +636,7 @@ static int net_slirp_init(NetClientState *peer, const char 
*model,
     cfg.vnameserver6 = ip6_dns;
     cfg.vdnssearch = dnssearch;
     cfg.vdomainname = vdomainname;
+    cfg.mfr_id = mfr_id;
     s->slirp = slirp_new(&cfg, &slirp_cb, s);
     QTAILQ_INSERT_TAIL(&slirp_stacks, s, entry);
 
@@ -1172,7 +1173,7 @@ int net_init_slirp(const Netdev *netdev, const char *name,
                          user->bootfile, user->dhcpstart,
                          user->dns, user->ipv6_dns, user->smb,
                          user->smbserver, dnssearch, user->domainname,
-                         user->tftp_server_name, errp);
+                         user->tftp_server_name, user->mfr_id, errp);
 
     while (slirp_configs) {
         config = slirp_configs;
diff --git a/qapi/net.json b/qapi/net.json
index d6f7cfd4d6..efc5cb3fb6 100644
--- a/qapi/net.json
+++ b/qapi/net.json
@@ -167,6 +167,8 @@
 #
 # @tftp-server-name: RFC2132 "TFTP server name" string (Since 3.1)
 #
+# @mfr-id: Manufacturer ID (Private Enterprise Number: IANA)
+#
 # Since: 1.2
 ##
 { 'struct': 'NetdevUserOptions',
@@ -192,7 +194,8 @@
     '*smbserver': 'str',
     '*hostfwd':   ['String'],
     '*guestfwd':  ['String'],
-    '*tftp-server-name': 'str' } }
+    '*tftp-server-name': 'str',
+    '*mfr-id': 'uint32' } }
 
 ##
 # @NetdevTapOptions:
-- 
2.30.2