// SPDX-License-Identifier: ISC
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/*
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* Copyright (c) 2014 Broadcom Corporation
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*/
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#include <linux/vmalloc.h>
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#include <net/cfg80211.h>
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#include <net/netlink.h>
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#include <brcmu_wifi.h>
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#include "fwil_types.h"
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#include "core.h"
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#include "p2p.h"
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#include "debug.h"
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#include "cfg80211.h"
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#include "vendor.h"
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#include "fwil.h"
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static int brcmf_cfg80211_vndr_cmds_dcmd_handler(struct wiphy *wiphy,
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struct wireless_dev *wdev,
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const void *data, int len)
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{
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struct brcmf_cfg80211_vif *vif;
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struct brcmf_if *ifp;
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const struct brcmf_vndr_dcmd_hdr *cmdhdr = data;
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struct sk_buff *reply;
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unsigned int payload, ret_len;
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void *dcmd_buf = NULL, *wr_pointer;
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u16 msglen, maxmsglen = PAGE_SIZE - 0x100;
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int ret;
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if (len < sizeof(*cmdhdr)) {
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brcmf_err("vendor command too short: %d\n", len);
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return -EINVAL;
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}
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vif = container_of(wdev, struct brcmf_cfg80211_vif, wdev);
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ifp = vif->ifp;
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brcmf_dbg(TRACE, "ifidx=%d, cmd=%d\n", ifp->ifidx, cmdhdr->cmd);
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if (cmdhdr->offset > len) {
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brcmf_err("bad buffer offset %d > %d\n", cmdhdr->offset, len);
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return -EINVAL;
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}
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len -= cmdhdr->offset;
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ret_len = cmdhdr->len;
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if (ret_len > 0 || len > 0) {
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if (len > BRCMF_DCMD_MAXLEN) {
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brcmf_err("oversize input buffer %d\n", len);
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len = BRCMF_DCMD_MAXLEN;
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}
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if (ret_len > BRCMF_DCMD_MAXLEN) {
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brcmf_err("oversize return buffer %d\n", ret_len);
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ret_len = BRCMF_DCMD_MAXLEN;
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}
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payload = max_t(unsigned int, ret_len, len) + 1;
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dcmd_buf = vzalloc(payload);
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if (NULL == dcmd_buf)
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return -ENOMEM;
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memcpy(dcmd_buf, (void *)cmdhdr + cmdhdr->offset, len);
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*(char *)(dcmd_buf + len) = '\0';
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}
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if (cmdhdr->set)
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ret = brcmf_fil_cmd_data_set(ifp, cmdhdr->cmd, dcmd_buf,
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ret_len);
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else
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ret = brcmf_fil_cmd_data_get(ifp, cmdhdr->cmd, dcmd_buf,
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ret_len);
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if (ret != 0)
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goto exit;
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wr_pointer = dcmd_buf;
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while (ret_len > 0) {
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msglen = ret_len > maxmsglen ? maxmsglen : ret_len;
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ret_len -= msglen;
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payload = msglen + sizeof(msglen);
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reply = cfg80211_vendor_cmd_alloc_reply_skb(wiphy, payload);
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if (NULL == reply) {
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ret = -ENOMEM;
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break;
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}
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if (nla_put(reply, BRCMF_NLATTR_DATA, msglen, wr_pointer) ||
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nla_put_u16(reply, BRCMF_NLATTR_LEN, msglen)) {
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kfree_skb(reply);
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ret = -ENOBUFS;
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break;
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}
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ret = cfg80211_vendor_cmd_reply(reply);
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if (ret)
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break;
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wr_pointer += msglen;
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}
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exit:
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vfree(dcmd_buf);
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return ret;
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}
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const struct wiphy_vendor_command brcmf_vendor_cmds[] = {
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{
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{
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.vendor_id = BROADCOM_OUI,
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.subcmd = BRCMF_VNDR_CMDS_DCMD
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},
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.flags = WIPHY_VENDOR_CMD_NEED_WDEV |
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WIPHY_VENDOR_CMD_NEED_NETDEV,
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.policy = VENDOR_CMD_RAW_DATA,
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.doit = brcmf_cfg80211_vndr_cmds_dcmd_handler
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},
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};
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