SLiRP overhaul
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RichardG867
193
src/network/slirp/ncsi.c
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193
src/network/slirp/ncsi.c
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/* SPDX-License-Identifier: BSD-3-Clause */
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/*
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* NC-SI (Network Controller Sideband Interface) "echo" model
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*
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* Copyright (C) 2016-2018 IBM Corp.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "slirp.h"
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#include "ncsi-pkt.h"
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static uint32_t ncsi_calculate_checksum(uint16_t *data, int len)
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{
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uint32_t checksum = 0;
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int i;
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/*
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* 32-bit unsigned sum of the NC-SI packet header and NC-SI packet
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* payload interpreted as a series of 16-bit unsigned integer values.
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*/
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for (i = 0; i < len / 2; i++) {
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checksum += htons(data[i]);
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}
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checksum = (~checksum + 1);
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return checksum;
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}
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/* Get Capabilities */
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static int ncsi_rsp_handler_gc(struct ncsi_rsp_pkt_hdr *rnh)
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{
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struct ncsi_rsp_gc_pkt *rsp = (struct ncsi_rsp_gc_pkt *)rnh;
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rsp->cap = htonl(~0);
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rsp->bc_cap = htonl(~0);
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rsp->mc_cap = htonl(~0);
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rsp->buf_cap = htonl(~0);
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rsp->aen_cap = htonl(~0);
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rsp->vlan_mode = 0xff;
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rsp->uc_cnt = 2;
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return 0;
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}
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/* Get Link status */
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static int ncsi_rsp_handler_gls(struct ncsi_rsp_pkt_hdr *rnh)
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{
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struct ncsi_rsp_gls_pkt *rsp = (struct ncsi_rsp_gls_pkt *)rnh;
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rsp->status = htonl(0x1);
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return 0;
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}
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/* Get Parameters */
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static int ncsi_rsp_handler_gp(struct ncsi_rsp_pkt_hdr *rnh)
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{
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struct ncsi_rsp_gp_pkt *rsp = (struct ncsi_rsp_gp_pkt *)rnh;
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/* no MAC address filters or VLAN filters on the channel */
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rsp->mac_cnt = 0;
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rsp->mac_enable = 0;
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rsp->vlan_cnt = 0;
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rsp->vlan_enable = 0;
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return 0;
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}
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static const struct ncsi_rsp_handler {
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unsigned char type;
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int payload;
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int (*handler)(struct ncsi_rsp_pkt_hdr *rnh);
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} ncsi_rsp_handlers[] = { { NCSI_PKT_RSP_CIS, 4, NULL },
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{ NCSI_PKT_RSP_SP, 4, NULL },
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{ NCSI_PKT_RSP_DP, 4, NULL },
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{ NCSI_PKT_RSP_EC, 4, NULL },
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{ NCSI_PKT_RSP_DC, 4, NULL },
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{ NCSI_PKT_RSP_RC, 4, NULL },
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{ NCSI_PKT_RSP_ECNT, 4, NULL },
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{ NCSI_PKT_RSP_DCNT, 4, NULL },
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{ NCSI_PKT_RSP_AE, 4, NULL },
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{ NCSI_PKT_RSP_SL, 4, NULL },
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{ NCSI_PKT_RSP_GLS, 16, ncsi_rsp_handler_gls },
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{ NCSI_PKT_RSP_SVF, 4, NULL },
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{ NCSI_PKT_RSP_EV, 4, NULL },
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{ NCSI_PKT_RSP_DV, 4, NULL },
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{ NCSI_PKT_RSP_SMA, 4, NULL },
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{ NCSI_PKT_RSP_EBF, 4, NULL },
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{ NCSI_PKT_RSP_DBF, 4, NULL },
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{ NCSI_PKT_RSP_EGMF, 4, NULL },
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{ NCSI_PKT_RSP_DGMF, 4, NULL },
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{ NCSI_PKT_RSP_SNFC, 4, NULL },
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{ NCSI_PKT_RSP_GVI, 40, NULL },
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{ NCSI_PKT_RSP_GC, 32, ncsi_rsp_handler_gc },
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{ NCSI_PKT_RSP_GP, 40, ncsi_rsp_handler_gp },
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{ NCSI_PKT_RSP_GCPS, 172, NULL },
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{ NCSI_PKT_RSP_GNS, 172, NULL },
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{ NCSI_PKT_RSP_GNPTS, 172, NULL },
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{ NCSI_PKT_RSP_GPS, 8, NULL },
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{ NCSI_PKT_RSP_OEM, 0, NULL },
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{ NCSI_PKT_RSP_PLDM, 0, NULL },
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{ NCSI_PKT_RSP_GPUUID, 20, NULL } };
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/*
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* packet format : ncsi header + payload + checksum
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*/
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#define NCSI_MAX_PAYLOAD 172
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#define NCSI_MAX_LEN (sizeof(struct ncsi_pkt_hdr) + NCSI_MAX_PAYLOAD + 4)
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void ncsi_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
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{
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const struct ncsi_pkt_hdr *nh =
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(const struct ncsi_pkt_hdr *)(pkt + ETH_HLEN);
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uint8_t ncsi_reply[ETH_HLEN + NCSI_MAX_LEN];
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struct ethhdr *reh = (struct ethhdr *)ncsi_reply;
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struct ncsi_rsp_pkt_hdr *rnh =
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(struct ncsi_rsp_pkt_hdr *)(ncsi_reply + ETH_HLEN);
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const struct ncsi_rsp_handler *handler = NULL;
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int i;
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int ncsi_rsp_len = sizeof(*nh);
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uint32_t checksum;
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uint32_t *pchecksum;
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memset(ncsi_reply, 0, sizeof(ncsi_reply));
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memset(reh->h_dest, 0xff, ETH_ALEN);
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memset(reh->h_source, 0xff, ETH_ALEN);
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reh->h_proto = htons(ETH_P_NCSI);
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for (i = 0; i < G_N_ELEMENTS(ncsi_rsp_handlers); i++) {
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if (ncsi_rsp_handlers[i].type == nh->type + 0x80) {
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handler = &ncsi_rsp_handlers[i];
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break;
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}
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}
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rnh->common.mc_id = nh->mc_id;
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rnh->common.revision = NCSI_PKT_REVISION;
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rnh->common.id = nh->id;
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rnh->common.type = nh->type + 0x80;
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rnh->common.channel = nh->channel;
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if (handler) {
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rnh->common.length = htons(handler->payload);
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rnh->code = htons(NCSI_PKT_RSP_C_COMPLETED);
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rnh->reason = htons(NCSI_PKT_RSP_R_NO_ERROR);
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if (handler->handler) {
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/* TODO: handle errors */
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handler->handler(rnh);
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}
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ncsi_rsp_len += handler->payload;
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} else {
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rnh->common.length = 0;
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rnh->code = htons(NCSI_PKT_RSP_C_UNAVAILABLE);
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rnh->reason = htons(NCSI_PKT_RSP_R_UNKNOWN);
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}
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/* Add the optional checksum at the end of the frame. */
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checksum = ncsi_calculate_checksum((uint16_t *)rnh, ncsi_rsp_len);
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pchecksum = (uint32_t *)((void *)rnh + ncsi_rsp_len);
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*pchecksum = htonl(checksum);
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ncsi_rsp_len += 4;
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slirp_send_packet_all(slirp, ncsi_reply, ETH_HLEN + ncsi_rsp_len);
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}
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