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b=LvYWT23RLcQ/s360lyGS4nD21B+VNWBUXStVsA8UP3NOXZKeFm8RI8eBJpgmq6uXBqd8E9BY932tmzfd+UpCxH4irOl0gnuCTCUK3m79njqejVpWmxZ6EDAzj5329M0o3QvLLhEScur0x/XYgCUE4GKAtK5ROTzZlsOCWcedCDVmypL9Kw9lfIMRKiDZslXuoUY6RNx6Gl3JE+8sBPu1X/uHYS4CCpu1b+y9UxbZTY9G9MXau8K7TEr9e7XXfhv18xlFf/FYip4K42FAtv3F0Y0xNwFeyY5z1JeqkiQI3T4nGtUurWm/5LzZ/wmNvCt4JiTt1SHzcrD8ZEgoO+de8A== From: Yunpeng Yang To: "philmd@linaro.org" CC: "minyard@acm.org" , "farosas@suse.de" , "lvivier@redhat.com" , "pbonzini@redhat.com" , "qemu-devel@nongnu.org" , Mark Cave-Ayland , "corey@minyard.net" , Jonathan Davies Subject: [PATCH v2 2/2] hw/ipmi/ipmi_bmc_sim: Support setting fake LAN channel config Thread-Topic: [PATCH v2 2/2] hw/ipmi/ipmi_bmc_sim: Support setting fake LAN channel config Thread-Index: AQHcflvqo3unXIH890y8e8vh4T4Oog== Date: Mon, 5 Jan 2026 15:56:55 +0000 Message-ID: <20260105155648.1037077-3-yunpeng.yang@nutanix.com> References: <20260105155648.1037077-1-yunpeng.yang@nutanix.com> In-Reply-To: <20260105155648.1037077-1-yunpeng.yang@nutanix.com> Accept-Language: en-US, en-GB Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-publictraffictype: Email x-ms-traffictypediagnostic: BYAPR02MB5029:EE_|CH8PR02MB11020:EE_ x-ms-office365-filtering-correlation-id: d5e8d8ce-c827-4ff8-4c53-08de4c730ce9 x-proofpoint-crosstenant: true x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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charset="utf-8" The "Set LAN Configuration Parameters" IPMI command is added to the `ipmi_bmc_sim` device to support dynamically setting fake LAN channel configurations. With the fake LAN channel enabled, inside the guest OS, tools such as `ipmitool` can be used to modify the configurations. Signed-off-by: Yunpeng Yang --- hw/ipmi/ipmi_bmc_sim.c | 110 ++++++++++++++++++++++++++++++++++++ tests/qtest/ipmi-kcs-test.c | 83 +++++++++++++++++++++++++++ 2 files changed, 193 insertions(+) diff --git a/hw/ipmi/ipmi_bmc_sim.c b/hw/ipmi/ipmi_bmc_sim.c index d88aa22b72..012e2ee4fe 100644 --- a/hw/ipmi/ipmi_bmc_sim.c +++ b/hw/ipmi/ipmi_bmc_sim.c @@ -106,6 +106,7 @@ =20 #define IPMI_NETFN_TRANSPORT 0x0c =20 +#define IPMI_CMD_SET_LAN_CONFIG 0x01 #define IPMI_CMD_GET_LAN_CONFIG 0x02 =20 =20 @@ -300,6 +301,7 @@ struct IPMIBmcSim { ((ibs)->lan.channel !=3D 0 && (ibs)->lan.channel =3D=3D (c)) =20 #define IPMI_BMC_LAN_CFG_CC_PARAM_NOT_SUPPORTED 0x80 +#define IPMI_BMC_LAN_CFG_CC_PARAM_READONLY 0x82 =20 #define IPMI_BMC_LAN_CFG_PARAM_SET_IN_PROGRESS 0x00 #define IPMI_BMC_LAN_CFG_PARAM_AUTH_TYPE_SUPPORT 0x01 @@ -2126,6 +2128,113 @@ static inline bool is_ipv4_netmask_valid(const void= *buf) return netmask !=3D 0 && clo32(netmask) + ctz32(netmask) =3D=3D 32; } =20 +/* + * Request data (from cmd[2] on): + * bytes meaning + * 1 [bits 3:0] channel number + * 2 parameter selector + * [3:N] configuration parameter data (from cmd[4] on) + */ +static void set_lan_config(IPMIBmcSim *ibs, + uint8_t *cmd, unsigned int cmd_len, + RspBuffer *rsp) +{ + uint8_t channel; + uint8_t *param; /* pointer to configuration parameter data */ + unsigned int param_len; + + if (ibs->lan.channel =3D=3D 0) { + /* LAN channel disabled. Fail as if this command were not defined.= */ + rsp_buffer_set_error(rsp, IPMI_CC_INVALID_CMD); + return; + } + if (cmd_len < 5) { + rsp_buffer_set_error(rsp, IPMI_CC_REQUEST_DATA_LENGTH_INVALID); + return; + } + channel =3D cmd[2] & 0xf; + param =3D cmd + 4; + param_len =3D cmd_len - 4; + + if (!IPMI_BMC_CHANNEL_IS_LAN(ibs, channel)) { + rsp_buffer_set_error(rsp, IPMI_CC_INVALID_DATA_FIELD); + return; + } + + switch (cmd[3]) { + case IPMI_BMC_LAN_CFG_PARAM_IP_ADDR: + if (param_len < NBYTES_IP) { + rsp_buffer_set_error(rsp, IPMI_CC_REQUEST_DATA_LENGTH_INVALID); + return; + } + memcpy(ibs->lan.ipaddr, param, NBYTES_IP); + break; + + case IPMI_BMC_LAN_CFG_PARAM_IP_ADDR_SOURCE: + if (param_len < 1) { + rsp_buffer_set_error(rsp, IPMI_CC_REQUEST_DATA_LENGTH_INVALID); + return; + } + if (!IPMI_BMC_LAN_CFG_IS_VALID_IP_SOURCE(*param)) { + rsp_buffer_set_error(rsp, IPMI_CC_INVALID_DATA_FIELD); + return; + } + ibs->lan.ipsrc =3D *param; + break; + + case IPMI_BMC_LAN_CFG_PARAM_MAC_ADDR: + if (param_len < NBYTES_MAC) { + rsp_buffer_set_error(rsp, IPMI_CC_REQUEST_DATA_LENGTH_INVALID); + return; + } + memcpy(ibs->lan.macaddr.a, param, NBYTES_MAC); + break; + + case IPMI_BMC_LAN_CFG_PARAM_SUBNET_MASK: + if (param_len < NBYTES_IP) { + rsp_buffer_set_error(rsp, IPMI_CC_REQUEST_DATA_LENGTH_INVALID); + return; + } + if (!is_ipv4_netmask_valid(param)) { + rsp_buffer_set_error(rsp, IPMI_CC_INVALID_DATA_FIELD); + return; + } + memcpy(ibs->lan.netmask, param, NBYTES_IP); + break; + + case IPMI_BMC_LAN_CFG_PARAM_DEFAULT_GW_IP_ADDR: + if (param_len < NBYTES_IP) { + rsp_buffer_set_error(rsp, IPMI_CC_REQUEST_DATA_LENGTH_INVALID); + return; + } + memcpy(ibs->lan.defgw_ipaddr, param, NBYTES_IP); + break; + + case IPMI_BMC_LAN_CFG_PARAM_DEFAULT_GW_MAC_ADDR: + if (param_len < NBYTES_MAC) { + rsp_buffer_set_error(rsp, IPMI_CC_REQUEST_DATA_LENGTH_INVALID); + return; + } + memcpy(ibs->lan.defgw_macaddr.a, param, NBYTES_MAC); + break; + + case IPMI_BMC_LAN_CFG_PARAM_SET_IN_PROGRESS: + case IPMI_BMC_LAN_CFG_PARAM_AUTH_TYPE_SUPPORT: + case IPMI_BMC_LAN_CFG_PARAM_AUTH_TYPE_ENABLES: + case IPMI_BMC_LAN_CFG_PARAM_IPV4_HDR_PARAMS: + case IPMI_BMC_LAN_CFG_PARAM_BACKUP_GW_ADDR: + case IPMI_BMC_LAN_CFG_PARAM_BACKUP_GW_MAC_ADDR: + case IPMI_BMC_LAN_CFG_PARAM_COMMUNITY_STRING: + case IPMI_BMC_LAN_CFG_PARAM_NUM_DESTINATIONS: + rsp_buffer_set_error(rsp, IPMI_BMC_LAN_CFG_CC_PARAM_READONLY); + return; + + default: + rsp_buffer_set_error(rsp, IPMI_BMC_LAN_CFG_CC_PARAM_NOT_SUPPORTED); + return; + } +} + /* * Request data (from cmd[2] to cmd[5] inclusive): * bytes meaning @@ -2324,6 +2433,7 @@ static const IPMINetfn storage_netfn =3D { }; =20 static const IPMICmdHandler transport_cmds[] =3D { + [IPMI_CMD_SET_LAN_CONFIG] =3D { set_lan_config }, [IPMI_CMD_GET_LAN_CONFIG] =3D { get_lan_config }, }; static const IPMINetfn transport_netfn =3D { diff --git a/tests/qtest/ipmi-kcs-test.c b/tests/qtest/ipmi-kcs-test.c index d0a207477e..9bab0d84ad 100644 --- a/tests/qtest/ipmi-kcs-test.c +++ b/tests/qtest/ipmi-kcs-test.c @@ -318,6 +318,88 @@ static void test_kcs_lan_get(void) } =20 =20 +/* set/get ip address: 192.0.2.2 */ +static uint8_t lan_set_ipaddr_cmd[] =3D { 0x30, 0x01, 0x01, 0x03, + 0xc0, 0x00, 0x02, 0x02 }; +static uint8_t lan_set_ipaddr_rsp[] =3D { 0x34, 0x01, 0x00 }; +static uint8_t lan_get_ipaddr_cmd[] =3D { 0x30, 0x02, 0x01, 0x03, 0x00, 0x= 00 }; +static uint8_t lan_get_ipaddr_rsp[] =3D { 0x34, 0x02, 0x00, 0x11, + 0xc0, 0x00, 0x02, 0x02 }; +/* set ip address source: static */ +static uint8_t lan_set_ipsrc_cmd[] =3D { 0x30, 0x01, 0x01, 0x04, 0x01 }; +static uint8_t lan_set_ipsrc_rsp[] =3D { 0x34, 0x01, 0x00 }; + +/* set/get subnet mask: 255.255.255.0 */ +static uint8_t lan_set_netmask_cmd[] =3D { 0x30, 0x01, 0x01, 0x06, + 0xff, 0xff, 0xff, 0x00 }; +static uint8_t lan_set_netmask_rsp[] =3D { 0x34, 0x01, 0x00 }; +static uint8_t lan_get_netmask_cmd[] =3D { 0x30, 0x02, 0x01, 0x06, 0x00, 0= x00 }; +static uint8_t lan_get_netmask_rsp[] =3D { 0x34, 0x02, 0x00, 0x11, + 0xff, 0xff, 0xff, 0x00 }; + +/* set/get default gateway ip address: 192.0.2.1 */ +static uint8_t lan_set_defgw_ipaddr_cmd[] =3D { 0x30, 0x01, 0x01, 0x0c, + 0xc0, 0x00, 0x02, 0x01 }; +static uint8_t lan_set_defgw_ipaddr_rsp[] =3D { 0x34, 0x01, 0x00 }; +static uint8_t lan_get_defgw_ipaddr_cmd[] =3D { 0x30, 0x02, 0x01, 0x0c, + 0x00, 0x00 }; +static uint8_t lan_get_defgw_ipaddr_rsp[] =3D { 0x34, 0x02, 0x00, 0x11, + 0xc0, 0x00, 0x02, 0x01 }; + +/* + * Set and then get LAN configurations + */ +static void test_kcs_lan_set_get(void) +{ + uint8_t rsp[20]; + unsigned int rsplen =3D 0; + + /* set ip address */ + rsplen =3D sizeof(rsp); + kcs_cmd(lan_set_ipaddr_cmd, sizeof(lan_set_ipaddr_cmd), rsp, &rsplen); + g_assert(rsplen =3D=3D sizeof(lan_set_ipaddr_rsp)); + g_assert(memcmp(lan_set_ipaddr_rsp, rsp, rsplen) =3D=3D 0); + + /* get ip address */ + rsplen =3D sizeof(rsp); + kcs_cmd(lan_get_ipaddr_cmd, sizeof(lan_get_ipaddr_cmd), rsp, &rsplen); + g_assert(rsplen =3D=3D sizeof(lan_get_ipaddr_rsp)); + g_assert(memcmp(lan_get_ipaddr_rsp, rsp, rsplen) =3D=3D 0); + + /* set ip address source */ + rsplen =3D sizeof(rsp); + kcs_cmd(lan_set_ipsrc_cmd, sizeof(lan_set_ipsrc_cmd), rsp, &rsplen); + g_assert(rsplen =3D=3D sizeof(lan_set_ipsrc_rsp)); + g_assert(memcmp(lan_set_ipsrc_rsp, rsp, rsplen) =3D=3D 0); + + /* set subnet mask */ + rsplen =3D sizeof(rsp); + kcs_cmd(lan_set_netmask_cmd, sizeof(lan_set_netmask_cmd), rsp, &rsplen= ); + g_assert(rsplen =3D=3D sizeof(lan_set_netmask_rsp)); + g_assert(memcmp(lan_set_netmask_rsp, rsp, rsplen) =3D=3D 0); + + /* get subnet mask */ + rsplen =3D sizeof(rsp); + kcs_cmd(lan_get_netmask_cmd, sizeof(lan_get_netmask_cmd), rsp, &rsplen= ); + g_assert(rsplen =3D=3D sizeof(lan_get_netmask_rsp)); + g_assert(memcmp(lan_get_netmask_rsp, rsp, rsplen) =3D=3D 0); + + /* set default gateway ip address */ + rsplen =3D sizeof(rsp); + kcs_cmd(lan_set_defgw_ipaddr_cmd, sizeof(lan_set_defgw_ipaddr_cmd), + rsp, &rsplen); + g_assert(rsplen =3D=3D sizeof(lan_set_defgw_ipaddr_rsp)); + g_assert(memcmp(lan_set_defgw_ipaddr_rsp, rsp, rsplen) =3D=3D 0); + + /* get default gateway ip address */ + rsplen =3D sizeof(rsp); + kcs_cmd(lan_get_defgw_ipaddr_cmd, sizeof(lan_get_defgw_ipaddr_cmd), + rsp, &rsplen); + g_assert(rsplen =3D=3D sizeof(lan_get_defgw_ipaddr_rsp)); + g_assert(memcmp(lan_get_defgw_ipaddr_rsp, rsp, rsplen) =3D=3D 0); +} + + int main(int argc, char **argv) { char *cmdline; @@ -340,6 +422,7 @@ int main(int argc, char **argv) qtest_add_func("/ipmi/local/kcs_channel_access", test_kcs_channel_acce= ss); qtest_add_func("/ipmi/local/kcs_channel_info", test_kcs_channel_info); qtest_add_func("/ipmi/local/kcs_lan_get", test_kcs_lan_get); + qtest_add_func("/ipmi/local/kcs_lan_set_get", test_kcs_lan_set_get); ret =3D g_test_run(); qtest_quit(global_qtest); =20 --=20 2.43.7