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git.proxmox.com Git - mirror_iproute2.git/blob - lib/ll_map.c
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
18 #include <sys/socket.h>
19 #include <netinet/in.h>
22 #include "libnetlink.h"
25 extern unsigned int if_nametoindex (const char *);
34 unsigned char addr
[20];
38 static struct idxmap
*idxmap
[16];
40 int ll_remember_index(const struct sockaddr_nl
*who
,
41 struct nlmsghdr
*n
, void *arg
)
44 struct ifinfomsg
*ifi
= NLMSG_DATA(n
);
45 struct idxmap
*im
, **imp
;
46 struct rtattr
*tb
[IFLA_MAX
+1];
48 if (n
->nlmsg_type
!= RTM_NEWLINK
)
51 if (n
->nlmsg_len
< NLMSG_LENGTH(sizeof(ifi
)))
55 memset(tb
, 0, sizeof(tb
));
56 parse_rtattr(tb
, IFLA_MAX
, IFLA_RTA(ifi
), IFLA_PAYLOAD(n
));
57 if (tb
[IFLA_IFNAME
] == NULL
)
60 h
= ifi
->ifi_index
&0xF;
62 for (imp
=&idxmap
[h
]; (im
=*imp
)!=NULL
; imp
= &im
->next
)
63 if (im
->index
== ifi
->ifi_index
)
67 im
= malloc(sizeof(*im
));
71 im
->index
= ifi
->ifi_index
;
75 im
->type
= ifi
->ifi_type
;
76 im
->flags
= ifi
->ifi_flags
;
77 if (tb
[IFLA_ADDRESS
]) {
79 im
->alen
= alen
= RTA_PAYLOAD(tb
[IFLA_ADDRESS
]);
80 if (alen
> sizeof(im
->addr
))
81 alen
= sizeof(im
->addr
);
82 memcpy(im
->addr
, RTA_DATA(tb
[IFLA_ADDRESS
]), alen
);
85 memset(im
->addr
, 0, sizeof(im
->addr
));
87 strcpy(im
->name
, RTA_DATA(tb
[IFLA_IFNAME
]));
91 const char *ll_idx_n2a(unsigned idx
, char *buf
)
97 for (im
= idxmap
[idx
&0xF]; im
; im
= im
->next
)
100 snprintf(buf
, 16, "if%d", idx
);
105 const char *ll_index_to_name(unsigned idx
)
107 static char nbuf
[16];
109 return ll_idx_n2a(idx
, nbuf
);
112 int ll_index_to_type(unsigned idx
)
118 for (im
= idxmap
[idx
&0xF]; im
; im
= im
->next
)
119 if (im
->index
== idx
)
124 unsigned ll_index_to_flags(unsigned idx
)
131 for (im
= idxmap
[idx
&0xF]; im
; im
= im
->next
)
132 if (im
->index
== idx
)
137 unsigned ll_name_to_index(const char *name
)
139 static char ncache
[16];
146 if (icache
&& strcmp(name
, ncache
) == 0)
148 for (i
=0; i
<16; i
++) {
149 for (im
= idxmap
[i
]; im
; im
= im
->next
) {
150 if (strcmp(im
->name
, name
) == 0) {
152 strcpy(ncache
, name
);
158 return if_nametoindex(name
);
161 int ll_init_map(struct rtnl_handle
*rth
)
163 if (rtnl_wilddump_request(rth
, AF_UNSPEC
, RTM_GETLINK
) < 0) {
164 perror("Cannot send dump request");
168 if (rtnl_dump_filter(rth
, ll_remember_index
, &idxmap
, NULL
, NULL
) < 0) {
169 fprintf(stderr
, "Dump terminated\n");