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https://git.kernel.org/pub/scm/network/wireless/iwd.git
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mpdu: Validate disassociation mpdu subtype
These own a reason code which is currently the only interesting information to handle. Let's skip the vendor specific ones for now.
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@ -54,6 +54,13 @@ static bool validate_atim_mgmt_mpdu(const struct mpdu *mpdu,
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return *offset == len;
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}
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static bool validate_disassociation_mgmt_mpdu(const struct mpdu *mpdu,
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int len, int *offset)
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{
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*offset += 2;
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return *offset <= len;
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}
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static bool validate_authentication_mgmt_mpdu(const struct mpdu *mpdu,
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int len, int *offset)
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{
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@ -103,6 +110,8 @@ static bool validate_mgmt_mpdu(const struct mpdu *mpdu, int len, int *offset)
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switch (mpdu->fc.subtype) {
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case MPDU_MANAGEMENT_SUBTYPE_ATIM:
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return validate_atim_mgmt_mpdu(mpdu, len, offset);
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case MPDU_MANAGEMENT_SUBTYPE_DISASSOCIATION:
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return validate_disassociation_mgmt_mpdu(mpdu, len, offset);
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case MPDU_MANAGEMENT_SUBTYPE_AUTHENTICATION:
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return validate_authentication_mgmt_mpdu(mpdu, len, offset);
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case MPDU_MANAGEMENT_SUBTYPE_DEAUTHENTICATION:
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@ -33,6 +33,7 @@ enum mpdu_type {
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/* 802.11, Table 8-1 "Valid type and subtype combinations" */
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enum mpdu_management_subtype {
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MPDU_MANAGEMENT_SUBTYPE_ATIM = 0x9,
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MPDU_MANAGEMENT_SUBTYPE_DISASSOCIATION = 0xA,
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MPDU_MANAGEMENT_SUBTYPE_AUTHENTICATION = 0xB,
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MPDU_MANAGEMENT_SUBTYPE_DEAUTHENTICATION = 0xC,
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};
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@ -96,6 +97,12 @@ struct mpdu_mgmt_header {
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#define MPDU_MGMT_SEQUENCE_NUMBER(v) \
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(((v).sequence_number_high << 4) + ((v).sequence_number_low))
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/* 802.11, Section 8.3.3.4 */
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struct mpdu_disassociation {
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__le16 reason_code;
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uint8_t ies[0];
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} __attribute__ ((packed));
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/* 802.11, Section 8.3.3.11 */
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struct mpdu_authentication {
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__le16 algorithm;
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@ -122,6 +129,7 @@ struct mpdu {
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struct mpdu_fc fc;
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struct mpdu_mgmt_header mgmt_hdr;
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union {
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struct mpdu_disassociation disassoc;
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struct mpdu_authentication auth;
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struct mpdu_deauthentication deauth;
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};
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