1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*
* NC-SI (Network Controller Sideband Interface) "echo" model
*
* Copyright (C) 2016-2018 IBM Corp.
*
* This code is licensed under the GPL version 2 or later. See the
* COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "slirp.h"
#include "ncsi-pkt.h"
static uint32_t ncsi_calculate_checksum(uint16_t *data, int len)
{
uint32_t checksum = 0;
int i;
/*
* 32-bit unsigned sum of the NC-SI packet header and NC-SI packet
* payload interpreted as a series of 16-bit unsigned integer values.
*/
for (i = 0; i < len; i++) {
checksum += htons(data[i]);
}
checksum = (~checksum + 1);
return checksum;
}
/* Get Capabilities */
static int ncsi_rsp_handler_gc(struct ncsi_rsp_pkt_hdr *rnh)
{
struct ncsi_rsp_gc_pkt *rsp = (struct ncsi_rsp_gc_pkt *) rnh;
rsp->cap = htonl(~0);
rsp->bc_cap = htonl(~0);
rsp->mc_cap = htonl(~0);
rsp->buf_cap = htonl(~0);
rsp->aen_cap = htonl(~0);
rsp->vlan_mode = 0xff;
rsp->uc_cnt = 2;
return 0;
}
/* Get Link status */
static int ncsi_rsp_handler_gls(struct ncsi_rsp_pkt_hdr *rnh)
{
struct ncsi_rsp_gls_pkt *rsp = (struct ncsi_rsp_gls_pkt *) rnh;
rsp->status = htonl(0x1);
return 0;
}
/* Get Parameters */
static int ncsi_rsp_handler_gp(struct ncsi_rsp_pkt_hdr *rnh)
{
struct ncsi_rsp_gp_pkt *rsp = (struct ncsi_rsp_gp_pkt *) rnh;
/* no MAC address filters or VLAN filters on the channel */
rsp->mac_cnt = 0;
rsp->mac_enable = 0;
rsp->vlan_cnt = 0;
rsp->vlan_enable = 0;
return 0;
}
static const struct ncsi_rsp_handler {
unsigned char type;
int payload;
int (*handler)(struct ncsi_rsp_pkt_hdr *rnh);
} ncsi_rsp_handlers[] = {
{ NCSI_PKT_RSP_CIS, 4, NULL },
{ NCSI_PKT_RSP_SP, 4, NULL },
{ NCSI_PKT_RSP_DP, 4, NULL },
{ NCSI_PKT_RSP_EC, 4, NULL },
{ NCSI_PKT_RSP_DC, 4, NULL },
{ NCSI_PKT_RSP_RC, 4, NULL },
{ NCSI_PKT_RSP_ECNT, 4, NULL },
{ NCSI_PKT_RSP_DCNT, 4, NULL },
{ NCSI_PKT_RSP_AE, 4, NULL },
{ NCSI_PKT_RSP_SL, 4, NULL },
{ NCSI_PKT_RSP_GLS, 16, ncsi_rsp_handler_gls },
{ NCSI_PKT_RSP_SVF, 4, NULL },
{ NCSI_PKT_RSP_EV, 4, NULL },
{ NCSI_PKT_RSP_DV, 4, NULL },
{ NCSI_PKT_RSP_SMA, 4, NULL },
{ NCSI_PKT_RSP_EBF, 4, NULL },
{ NCSI_PKT_RSP_DBF, 4, NULL },
{ NCSI_PKT_RSP_EGMF, 4, NULL },
{ NCSI_PKT_RSP_DGMF, 4, NULL },
{ NCSI_PKT_RSP_SNFC, 4, NULL },
{ NCSI_PKT_RSP_GVI, 40, NULL },
{ NCSI_PKT_RSP_GC, 32, ncsi_rsp_handler_gc },
{ NCSI_PKT_RSP_GP, 40, ncsi_rsp_handler_gp },
{ NCSI_PKT_RSP_GCPS, 172, NULL },
{ NCSI_PKT_RSP_GNS, 172, NULL },
{ NCSI_PKT_RSP_GNPTS, 172, NULL },
{ NCSI_PKT_RSP_GPS, 8, NULL },
{ NCSI_PKT_RSP_OEM, 0, NULL },
{ NCSI_PKT_RSP_PLDM, 0, NULL },
{ NCSI_PKT_RSP_GPUUID, 20, NULL }
};
/*
* packet format : ncsi header + payload + checksum
*/
#define NCSI_MAX_PAYLOAD 172
#define NCSI_MAX_LEN (sizeof(struct ncsi_pkt_hdr) + NCSI_MAX_PAYLOAD + 4)
void ncsi_input(Slirp *slirp, const uint8_t *pkt, int pkt_len)
{
struct ncsi_pkt_hdr *nh = (struct ncsi_pkt_hdr *)(pkt + ETH_HLEN);
uint8_t ncsi_reply[ETH_HLEN + NCSI_MAX_LEN];
struct ethhdr *reh = (struct ethhdr *)ncsi_reply;
struct ncsi_rsp_pkt_hdr *rnh = (struct ncsi_rsp_pkt_hdr *)
(ncsi_reply + ETH_HLEN);
const struct ncsi_rsp_handler *handler = NULL;
int i;
int ncsi_rsp_len = sizeof(*nh);
uint32_t checksum;
uint32_t *pchecksum;
memset(ncsi_reply, 0, sizeof(ncsi_reply));
memset(reh->h_dest, 0xff, ETH_ALEN);
memset(reh->h_source, 0xff, ETH_ALEN);
reh->h_proto = htons(ETH_P_NCSI);
for (i = 0; i < ARRAY_SIZE(ncsi_rsp_handlers); i++) {
if (ncsi_rsp_handlers[i].type == nh->type + 0x80) {
handler = &ncsi_rsp_handlers[i];
break;
}
}
rnh->common.mc_id = nh->mc_id;
rnh->common.revision = NCSI_PKT_REVISION;
rnh->common.id = nh->id;
rnh->common.type = nh->type + 0x80;
rnh->common.channel = nh->channel;
if (handler) {
rnh->common.length = htons(handler->payload);
rnh->code = htons(NCSI_PKT_RSP_C_COMPLETED);
rnh->reason = htons(NCSI_PKT_RSP_R_NO_ERROR);
if (handler->handler) {
/* TODO: handle errors */
handler->handler(rnh);
}
ncsi_rsp_len += handler->payload;
} else {
rnh->common.length = 0;
rnh->code = htons(NCSI_PKT_RSP_C_UNAVAILABLE);
rnh->reason = htons(NCSI_PKT_RSP_R_UNKNOWN);
}
/* Add the optional checksum at the end of the frame. */
checksum = ncsi_calculate_checksum((uint16_t *) rnh, ncsi_rsp_len);
pchecksum = (uint32_t *)((void *) rnh + ncsi_rsp_len);
*pchecksum = htonl(checksum);
ncsi_rsp_len += 4;
slirp_output(slirp->opaque, ncsi_reply, ETH_HLEN + ncsi_rsp_len);
}
|
