From: Andrei Emeltchenko <andrei.emeltchenko.news@gmail.com>
To: Peter Krystad <pkrystad@codeaurora.org>
Cc: linux-bluetooth@vger.kernel.org
Subject: Re: [PATCH 2/4] Add parsing of A2MP signals
Date: Mon, 24 Oct 2011 10:34:47 +0300 [thread overview]
Message-ID: <20111024073443.GB31896@aemeltch-MOBL1> (raw)
In-Reply-To: <1319239802-22457-3-git-send-email-pkrystad@codeaurora.org>
Hi Peter,
On Fri, Oct 21, 2011 at 04:30:00PM -0700, Peter Krystad wrote:
> Add parsing of A2MP signalling.
> Example output:
>
> 2011-10-18 16:09:44.493202 > ACL data: handle 39 flags 0x02 dlen 16
> A2MP: Discover req: mtu/mps 670 mask: 0x0000
> 2011-10-18 16:09:44.493404 < ACL data: handle 39 flags 0x00 dlen 22
> A2MP: Discover rsp: mtu/mps 670 mask: 0x0000
> Controller list:
> id 0, type 0, status 0x01 (Bluetooth only)
> id 17, type 254, status 0x06 (Full capacity)
> 2011-10-18 16:09:44.697203 > ACL data: handle 39 flags 0x02 dlen 13
> A2MP: Get Info req: id 17
> 2011-10-18 16:09:44.697312 < ACL data: handle 39 flags 0x00 dlen 30
> A2MP: Get Info rsp: id 17 status (0) Success
> total bandwidth 500000
> max guaranteed bandwidth 0
> min latency 100000
> pal capabilities 0x0000
> assoc size 8
> 2011-10-18 16:09:44.893203 > ACL data: handle 39 flags 0x02 dlen 13
> A2MP: Get AMP Assoc req: id 17
> 2011-10-18 16:09:44.893618 < ACL data: handle 39 flags 0x00 dlen 22
> A2MP: Get AMP Assoc rsp: id 17 status (0) Success
> assoc data:
> 08 01 b1 01 0a 04 6c 42
> 2011-10-18 16:09:45.598201 > ACL data: handle 39 flags 0x02 dlen 22
> A2MP: Create Physical Link req: local id 1 remote id 17
> assoc data:
> 08 01 b1 01 0a 04 6d 38
> 2011-10-18 16:09:45.598643 < ACL data: handle 39 flags 0x00 dlen 15
> A2MP: Create Physical Link rsp: local id 17 remote id 1 status 0
> Success
> ---
> lib/amp.h | 133 +++++++++++++++++++
> parser/l2cap.c | 385 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
> parser/parser.h | 1 +
> src/hcidump.c | 1 +
> 4 files changed, 520 insertions(+), 0 deletions(-)
> create mode 100644 lib/amp.h
>
> diff --git a/lib/amp.h b/lib/amp.h
Minor comments. Would it be better to name it a2mp.h and functions below a2mp_*?
Otherwise as Marcel mentioned header patches shall be applied first to
bluez.
Best regards
Andrei Emeltchenko
> new file mode 100644
> index 0000000..0c6300a
> --- /dev/null
> +++ b/lib/amp.h
> @@ -0,0 +1,133 @@
> +/*
> + *
> + * BlueZ - Bluetooth protocol stack for Linux
> + *
> + * Copyright (C) 2010-2011 Code Aurora Forum. All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + */
> +
> +#ifndef __AMP_H
> +#define __AMP_H
> +
> +#ifdef __cplusplus
> +extern "C" {
> +#endif
> +
> +#define AMP_MGR_CID 0x03
> +
> +/* AMP manager codes */
> +#define AMP_COMMAND_REJ 0x01
> +#define AMP_DISCOVER_REQ 0x02
> +#define AMP_DISCOVER_RSP 0x03
> +#define AMP_CHANGE_NOTIFY 0x04
> +#define AMP_CHANGE_RSP 0x05
> +#define AMP_INFO_REQ 0x06
> +#define AMP_INFO_RSP 0x07
> +#define AMP_ASSOC_REQ 0x08
> +#define AMP_ASSOC_RSP 0x09
> +#define AMP_LINK_REQ 0x0a
> +#define AMP_LINK_RSP 0x0b
> +#define AMP_DISCONN_REQ 0x0c
> +#define AMP_DISCONN_RSP 0x0d
> +
> +typedef struct {
> + uint8_t code;
> + uint8_t ident;
> + uint16_t len;
> +} __attribute__ ((packed)) amp_mgr_hdr;
> +#define AMP_MGR_HDR_SIZE 4
> +
> +/* AMP ASSOC structure */
> +typedef struct {
> + uint8_t type_id;
> + uint16_t len;
> + uint8_t data[0];
> +} __attribute__ ((packed)) amp_assoc_tlv;
> +
> +typedef struct {
> + uint16_t reason;
> +} __attribute__ ((packed)) amp_cmd_rej_parms;
> +
> +typedef struct {
> + uint16_t mtu;
> + uint16_t mask;
> +} __attribute__ ((packed)) amp_discover_req_parms;
> +
> +typedef struct {
> + uint16_t mtu;
> + uint16_t mask;
> + uint8_t controller_list[0];
> +} __attribute__ ((packed)) amp_discover_rsp_parms;
> +
> +typedef struct {
> + uint8_t id;
> +} __attribute__ ((packed)) amp_info_req_parms;
> +
> +typedef struct {
> + uint8_t id;
> + uint8_t status;
> + uint32_t total_bandwidth;
> + uint32_t max_bandwidth;
> + uint32_t min_latency;
> + uint16_t pal_caps;
> + uint16_t assoc_size;
> +} __attribute__ ((packed)) amp_info_rsp_parms;
> +
> +typedef struct {
> + uint8_t id;
> + uint8_t status;
> + amp_assoc_tlv assoc;
> +} __attribute__ ((packed)) amp_assoc_rsp_parms;
> +
> +typedef struct {
> + uint8_t local_id;
> + uint8_t remote_id;
> + amp_assoc_tlv assoc;
> +} __attribute__ ((packed)) amp_link_req_parms;
> +
> +typedef struct {
> + uint8_t local_id;
> + uint8_t remote_id;
> + uint8_t status;
> +} __attribute__ ((packed)) amp_link_rsp_parms;
> +
> +typedef struct {
> + uint8_t local_id;
> + uint8_t remote_id;
> +} __attribute__ ((packed)) amp_disconn_req_parms;
> +
> +#define AMP_COMMAND_NOT_RECOGNIZED 0x0000
> +
> +/* AMP controller status */
> +#define AMP_CT_POWERED_DOWN 0x00
> +#define AMP_CT_BLUETOOTH_ONLY 0x01
> +#define AMP_CT_NO_CAPACITY 0x02
> +#define AMP_CT_LOW_CAPACITY 0x03
> +#define AMP_CT_MEDIUM_CAPACITY 0x04
> +#define AMP_CT_HIGH_CAPACITY 0x05
> +#define AMP_CT_FULL_CAPACITY 0x06
> +
> +/* AMP response status */
> +#define AMP_STATUS_SUCCESS 0x00
> +#define AMP_STATUS_INVALID_CTRL_ID 0x01
> +#define AMP_STATUS_UNABLE_START_LINK_CREATION 0x02
> +#define AMP_STATUS_NO_PHYSICAL_LINK_EXISTS 0x02
> +#define AMP_STATUS_COLLISION_OCCURED 0x03
> +#define AMP_STATUS_DISCONN_REQ_RECVD 0x04
> +#define AMP_STATUS_PHYS_LINK_EXISTS 0x05
> +#define AMP_STATUS_SECURITY_VIOLATION 0x06
> +
> +#ifdef __cplusplus
> +}
> +#endif
> +
> +#endif /* __AMP_H */
> diff --git a/parser/l2cap.c b/parser/l2cap.c
> index 7547e8b..7915788 100644
> --- a/parser/l2cap.c
> +++ b/parser/l2cap.c
> @@ -36,6 +36,7 @@
> #include "parser/sdp.h"
> #include "lib/hci.h"
> #include "lib/l2cap.h"
> +#include "lib/amp.h"
>
> typedef struct {
> uint16_t handle;
> @@ -259,6 +260,16 @@ static char *reason2str(uint16_t reason)
> }
> }
>
> +static char *ampreason2str(uint16_t reason)
> +{
> + switch (reason) {
> + case AMP_COMMAND_NOT_RECOGNIZED:
> + return "Command not recognized";
> + default:
> + return "Reserved";
> + }
> +}
> +
> static char *connresult2str(uint16_t result)
> {
> switch (result) {
> @@ -399,6 +410,76 @@ static char *supervisory2str(uint8_t supervisory)
> }
> }
>
> +static char *ampctstatus2str(uint8_t status)
> +{
> + switch (status) {
> + case AMP_CT_POWERED_DOWN:
> + return "Powered down";
> + case AMP_CT_BLUETOOTH_ONLY:
> + return "Bluetooth only";
> + case AMP_CT_NO_CAPACITY:
> + return "No capacity";
> + case AMP_CT_LOW_CAPACITY:
> + return "Low capacity";
> + case AMP_CT_MEDIUM_CAPACITY:
> + return "Medium capacity";
> + case AMP_CT_HIGH_CAPACITY:
> + return "High capacity";
> + case AMP_CT_FULL_CAPACITY:
> + return "Full capacity";
> + default:
> + return "Reserved";
> +
> + }
> +}
> +
> +static char *ampstatus2str(uint8_t status)
> +{
> + switch (status) {
> + case AMP_STATUS_SUCCESS:
> + return "Success";
> + case AMP_STATUS_INVALID_CTRL_ID:
> + return "Invalid Controller ID";
> + default:
> + return "Reserved";
> + }
> +}
> +
> +static char *ampcplstatus2str(uint8_t status)
> +{
> + switch (status) {
> + case AMP_STATUS_SUCCESS:
> + return "Success";
> + case AMP_STATUS_INVALID_CTRL_ID:
> + return "Invalid Controller ID";
> + case AMP_STATUS_UNABLE_START_LINK_CREATION:
> + return "Failed - Unable to start link creation";
> + case AMP_STATUS_COLLISION_OCCURED:
> + return "Failed - Collision occured";
> + case AMP_STATUS_DISCONN_REQ_RECVD:
> + return "Failed - Disconnect physical link received";
> + case AMP_STATUS_PHYS_LINK_EXISTS:
> + return "Failed - Physical link already exists";
> + case AMP_STATUS_SECURITY_VIOLATION:
> + return "Failed - Security violation";
> + default:
> + return "Reserved";
> + }
> +}
> +
> +static char *ampdplstatus2str(uint8_t status)
> +{
> + switch (status) {
> + case AMP_STATUS_SUCCESS:
> + return "Success";
> + case AMP_STATUS_INVALID_CTRL_ID:
> + return "Invalid Controller ID";
> + case AMP_STATUS_NO_PHYSICAL_LINK_EXISTS:
> + return "Failed - No Physical Link exists";
> + default:
> + return "Reserved";
> + }
> +}
>
> static inline void command_rej(int level, struct frame *frm)
> {
> @@ -923,6 +1004,240 @@ static inline void move_cfm_rsp(int level, l2cap_cmd_hdr *cmd, struct frame *frm
> printf("Move cfm rsp: icid 0x%4.4x\n", icid);
> }
>
> +static inline void amp_command_rej(int level, struct frame *frm)
> +{
> + amp_cmd_rej_parms *h = frm->ptr;
> + uint16_t reason = btohs(h->reason);
> +
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + printf("Command Reject: reason (%d)- ", reason);
> + p_indent(level + 1, frm);
> + printf("%s\n", ampreason2str(reason));
> +}
> +
> +static inline void amp_discover_req(int level, struct frame *frm, uint16_t len)
> +{
> + amp_discover_req_parms *h = frm->ptr;
> + uint16_t mtu = btohs(h->mtu);
> + uint8_t *octet = (uint8_t *)&(h->mask);
> + uint16_t mask;
> + uint8_t extension;
> +
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + printf("Discover req: mtu/mps %d ", mtu);
> + len -= 2;
> +
> + printf("mask:");
> +
> + do {
> + len -= 2;
> + mask = btohs(*(uint16_t *)(&octet[0]));
> + printf(" 0x%4.4x", mask);
> +
> + extension = octet[1] & 0x80;
> + octet += 2;
> + } while ((extension != 0) && (len >= 2));
> +
> + printf("\n");
> +}
> +
> +static inline void controller_list_dump (int level, uint8_t *octet, uint16_t len)
> +{
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + p_indent(level, 0);
> + printf("Controller list:\n");
> +
> + while (len >= 3) {
> + p_indent(level + 1, 0);
> + printf("id %d, type %d, status 0x%2.2x (%s)\n",
> + octet[0], octet[1], octet[2], ampctstatus2str(octet[2]));
> + octet += 3;
> + len -= 3;
> + }
> +
> +}
> +
> +static inline void amp_discover_rsp(int level, struct frame *frm, uint16_t len)
> +{
> + amp_discover_rsp_parms *h = frm->ptr;
> + uint16_t mtu = btohs(h->mtu);
> + uint8_t *octet = (uint8_t *)&(h->mask);
> + uint16_t mask;
> + uint8_t extension;
> +
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + printf("Discover rsp: mtu/mps %d ", mtu);
> + len -= 2;
> +
> + printf("mask:");
> +
> + do {
> + len -= 2;
> + mask = btohs(*(uint16_t *)(&octet[0]));
> + printf(" 0x%4.4x", mask);
> +
> + extension = octet[1] & 0x80;
> + octet += 2;
> + } while ((extension != 0) && (len >= 2));
> +
> + printf("\n");
> +
> + if (len >= 3) {
> + controller_list_dump (level + 1, octet, len);
> + }
> +}
> +
> +static inline void amp_change_notify(int level, struct frame *frm, uint16_t len)
> +{
> + uint8_t *octet = frm->ptr;
> +
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + printf("Change Notify\n");
> +
> + if (len >= 3) {
> + controller_list_dump (level + 1, octet, len);
> + }
> +}
> +
> +static inline void amp_change_rsp(int level, struct frame *frm)
> +{
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + printf("Change Response\n");
> +}
> +
> +static inline void amp_info_req(int level, struct frame *frm)
> +{
> + amp_info_req_parms *h = frm->ptr;
> +
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + printf("Get Info req: id %d\n", h->id);
> +}
> +
> +static inline void amp_info_rsp(int level, struct frame *frm)
> +{
> + amp_info_rsp_parms *h = frm->ptr;
> +
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + printf("Get Info rsp: id %d status (%d) %s\n",
> + h->id, h->status, ampstatus2str(h->status));
> +
> + p_indent(level + 1, frm);
> + printf("total bandwidth %d\n", btohl(h->total_bandwidth));
> + p_indent(level + 1, frm);
> + printf("max guaranteed bandwidth %d\n", btohl(h->max_bandwidth));
> + p_indent(level + 1, frm);
> + printf("min latency %d\n", btohl(h->min_latency));
> + p_indent(level + 1, frm);
> + printf("pal capabilities 0x%4.4x\n", btohs(h->pal_caps));
> + p_indent(level + 1, frm);
> + printf("assoc size %d\n", btohs(h->assoc_size));
> +}
> +
> +static inline void amp_assoc_req(int level, struct frame *frm)
> +{
> + amp_info_req_parms *h = frm->ptr;
> +
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + printf("Get AMP Assoc req: id %d\n", h->id);
> +}
> +
> +static inline void amp_assoc_dump(int level, uint8_t *assoc, uint16_t len)
> +{
> + int i;
> +
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + p_indent(level, 0);
> + printf("assoc data:");
> + for (i = 0; i < len; i++) {
> + if (!(i%16)) printf("\n");
> + if (!(i%16)) p_indent(level+1, 0);
> + printf("%2.2x ",*assoc++);
> + }
> + printf("\n");
> +
> +}
> +
> +static inline void amp_assoc_rsp(int level, struct frame *frm, uint16_t len)
> +{
> + amp_assoc_rsp_parms *h = frm->ptr;
> +
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + printf("Get AMP Assoc rsp: id %d status (%d) %s \n",
> + h->id, h->status, ampstatus2str(h->status));
> + amp_assoc_dump(level + 1, (uint8_t *) &h->assoc, len - 2);
> +}
> +
> +static inline void amp_link_req(int level, struct frame *frm, uint16_t len)
> +{
> + amp_link_req_parms *h = frm->ptr;
> +
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + printf("Create Physical Link req: local id %d remote id %d\n",
> + h->local_id, h->remote_id);
> + amp_assoc_dump(level + 1, (uint8_t *) &h->assoc, len - 2);
> +}
> +
> +static inline void amp_link_rsp(int level, struct frame *frm)
> +{
> + amp_link_rsp_parms *h = frm->ptr;
> +
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + printf("Create Physical Link rsp: local id %d remote id %d status %d\n",
> + h->local_id, h->remote_id, h->status);
> + p_indent(level+1, 0);
> + printf("%s\n", ampcplstatus2str(h->status));
> +}
> +
> +static inline void amp_disconn_req(int level, struct frame *frm)
> +{
> + amp_disconn_req_parms *h = frm->ptr;
> +
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + printf("Disconnect Physical Link req: local id %d remote id %d\n",
> + h->local_id, h->remote_id);
> +}
> +
> +static inline void amp_disconn_rsp(int level, struct frame *frm)
> +{
> + amp_link_rsp_parms *h = frm->ptr;
> +
> + if (p_filter(FILT_A2MP))
> + return;
> +
> + printf("Disconnect Physical Link rsp: local id %d remote id %d status %d\n",
> + h->local_id, h->remote_id, h->status);
> + p_indent(level+1, 0);
> + printf("%s\n", ampdplstatus2str(h->status));
> +}
> +
> static void l2cap_parse(int level, struct frame *frm)
> {
> l2cap_hdr *hdr = (void *)frm->ptr;
> @@ -1043,6 +1358,76 @@ static void l2cap_parse(int level, struct frame *frm)
> p_indent(level, frm);
> printf("L2CAP(c): len %d psm %d\n", dlen, psm);
> raw_dump(level, frm);
> + } else if ((cid == 0x3) && (frm->len > 4)) {
> +
> + /* Adjust for extra ERTM control bytes */
> + frm->ptr += 2;
> + frm->len -= 2;
> +
> + while (frm->len >= AMP_MGR_HDR_SIZE) {
> + amp_mgr_hdr *hdr = frm->ptr;
> +
> + frm->ptr += AMP_MGR_HDR_SIZE;
> + frm->len -= AMP_MGR_HDR_SIZE;
> +
> + if (!p_filter(FILT_A2MP)) {
> + p_indent(level, frm);
> + printf("A2MP: ");
> + }
> + switch (hdr->code) {
> + case AMP_COMMAND_REJ:
> + amp_command_rej(level, frm);
> + break;
> + case AMP_DISCOVER_REQ:
> + amp_discover_req(level, frm, hdr->len);
> + break;
> + case AMP_DISCOVER_RSP:
> + amp_discover_rsp(level, frm, hdr->len);
> + break;
> + case AMP_CHANGE_NOTIFY:
> + amp_change_notify(level, frm, hdr->len);
> + break;
> + case AMP_CHANGE_RSP:
> + amp_change_rsp(level, frm);
> + break;
> + case AMP_INFO_REQ:
> + amp_info_req(level, frm);
> + break;
> + case AMP_INFO_RSP:
> + amp_info_rsp(level, frm);
> + break;
> + case AMP_ASSOC_REQ:
> + amp_assoc_req(level, frm);
> + break;
> + case AMP_ASSOC_RSP:
> + amp_assoc_rsp(level, frm, hdr->len);
> + break;
> + case AMP_LINK_REQ:
> + amp_link_req(level, frm, hdr->len);
> + break;
> + case AMP_LINK_RSP:
> + amp_link_rsp(level, frm);
> + break;
> + case AMP_DISCONN_REQ:
> + amp_disconn_req(level, frm);
> + break;
> + case AMP_DISCONN_RSP:
> + amp_disconn_rsp(level, frm);
> + break;
> + default:
> + if (p_filter(FILT_A2MP))
> + break;
> + printf("code 0x%2.2x ident %d len %d\n",
> + hdr->code, hdr->ident, btohs(hdr->len));
> + raw_dump(level, frm);
> + }
> +
> + if (frm->len > btohs(hdr->len)) {
> + frm->len -= btohs(hdr->len);
> + frm->ptr += btohs(hdr->len);
> + } else
> + frm->len = 0;
> + }
> } else if (cid == 0x04) {
> if (!p_filter(FILT_ATT))
> att_dump(level, frm);
> diff --git a/parser/parser.h b/parser/parser.h
> index e975808..22d18c3 100644
> --- a/parser/parser.h
> +++ b/parser/parser.h
> @@ -80,6 +80,7 @@ struct frame {
> #define FILT_AVCTP 0x0800
> #define FILT_ATT 0x1000
> #define FILT_SMP 0x2000
> +#define FILT_A2MP 0x4000
>
> #define FILT_OBEX 0x00010000
> #define FILT_CAPI 0x00020000
> diff --git a/src/hcidump.c b/src/hcidump.c
> index 0c13360..2513c7c 100644
> --- a/src/hcidump.c
> +++ b/src/hcidump.c
> @@ -802,6 +802,7 @@ static struct {
> { "hci", FILT_HCI },
> { "sco", FILT_SCO },
> { "l2cap", FILT_L2CAP },
> + { "a2mp", FILT_A2MP },
> { "rfcomm", FILT_RFCOMM },
> { "sdp", FILT_SDP },
> { "bnep", FILT_BNEP },
> --
> 1.7.7
>
> --
> Peter Krystad
> Employee of Qualcomm Innovation Center, Inc.
> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum
> --
> To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2011-10-24 7:34 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-21 23:29 [PATCH 0/4] Add parsing of BT 3.0+HS signalling Peter Krystad
2011-10-21 23:29 ` [PATCH 1/4] Add parsing of L2CAP Create/Move Channel signals Peter Krystad
2011-10-22 7:21 ` Marcel Holtmann
2011-10-21 23:30 ` [PATCH 2/4] Add parsing of A2MP signals Peter Krystad
2011-10-24 7:34 ` Andrei Emeltchenko [this message]
2011-10-26 13:33 ` Andrei Emeltchenko
2011-10-26 18:49 ` Peter Krystad
2011-10-21 23:30 ` [PATCH 3/4] Add parsing of L2CAP Fixed Channel list Peter Krystad
2011-10-24 7:51 ` Andrei Emeltchenko
2011-10-21 23:30 ` [PATCH 4/4] Minor cleanup of indentation in output Peter Krystad
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