Remove obsolete 'vcan' tool.
Oliver Hartkopp
parent
64603859fb
commit
0740b53016
2
Makefile
2
Makefile
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@ -48,7 +48,7 @@ CFLAGS = -O2 -Wall -Wno-parentheses -I../kernel/2.6/include \
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-DAF_CAN=PF_CAN
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PROGRAMS = candump cansniffer cansend canplayer canlogserver cangen\
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canbusload log2long log2asc asc2log vcan\
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canbusload log2long log2asc asc2log\
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isotpdump isotprecv isotpsend isotpsniffer isotptun\
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slcan_attach slcand slcanpty
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144
vcan.c
144
vcan.c
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@ -1,144 +0,0 @@
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/*
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* a real quick'n'dirty hack to add/remove vcan interfaces.
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* (also to have something to test the new RTNL API in vcan.)
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* this will be added to ip(8) of the iproute package, making
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* this hack obsolete.
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*
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* we don't check the return value of sendto() and don't wait for
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* a reply using recvmsg(). We just hope everything works fine,
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* otherwise use strace, or feel free to add the code before this
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* whole thing is dumped to the bit bucket.
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*
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* Parts of this code were taken from the iproute source.
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*
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* urs
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <asm/types.h>
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#include <linux/netlink.h>
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#include <linux/rtnetlink.h>
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#include <linux/if_link.h>
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#ifndef IFLA_LINKINFO
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#error Your kernel includes do not provide the needed netlink interface function.
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#error This is a normal behaviour for Kernel versions below v2.6.24 .
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#error You do not need this tool for Kernel versions below v2.6.24 anyway as
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#error the number of vcan driver instances can be defined as a vcan.ko module
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#error commandline parameter (default = 4) in older Kernels.
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#endif
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#define NLMSG_TAIL(nmsg) \
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((struct rtattr *)(((void *) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
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int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data,
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int alen);
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void usage()
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{
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fprintf(stderr, "Usage: vcan create\n"
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" vcan delete iface\n");
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exit(1);
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}
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int main(int argc, char **argv)
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{
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int s;
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char *cmd, *dev;
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struct {
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struct nlmsghdr n;
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struct ifinfomsg i;
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char buf[1024];
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} req;
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struct sockaddr_nl nladdr;
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struct rtattr *linkinfo;
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#ifdef OBSOLETE
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fprintf(stderr, "This program is a temporary hack and is now obsolete.\n"
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"Please use ip(8) instead, i.e.\n"
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" ip link add type vcan or\n"
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" ip link delete iface\n");
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exit(1);
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#endif
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if (argc < 2)
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usage();
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cmd = argv[1];
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s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
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memset(&req, 0, sizeof(req));
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if (strcmp(cmd, "create") == 0) {
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req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
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req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL;
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req.n.nlmsg_type = RTM_NEWLINK;
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req.n.nlmsg_seq = 0;
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req.i.ifi_family = AF_UNSPEC;
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linkinfo = NLMSG_TAIL(&req.n);
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addattr_l(&req.n, sizeof(req), IFLA_LINKINFO, NULL, 0);
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addattr_l(&req.n, sizeof(req), IFLA_INFO_KIND, "vcan", strlen("vcan"));
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linkinfo->rta_len = (void*)NLMSG_TAIL(&req.n) - (void*)linkinfo;
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} else if (strcmp(cmd, "delete") == 0) {
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if (argc < 3)
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usage();
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dev = argv[2];
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req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
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req.n.nlmsg_flags = NLM_F_REQUEST;
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req.n.nlmsg_type = RTM_DELLINK;
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req.i.ifi_family = AF_UNSPEC;
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req.i.ifi_index = if_nametoindex(dev);
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} else
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usage();
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memset(&nladdr, 0, sizeof(nladdr));
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nladdr.nl_family = AF_NETLINK;
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nladdr.nl_pid = 0;
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nladdr.nl_groups = 0;
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#if 1
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sendto(s, &req, req.n.nlmsg_len, 0,
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(struct sockaddr*)&nladdr, sizeof(nladdr));
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#else
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{
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int i;
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for (i = 0; i < req.n.nlmsg_len; i++) {
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printf(" %02x", ((unsigned char*)&req)[i]);
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if (i % 16 == 15)
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putchar('\n');
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}
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putchar('\n');
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}
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#endif
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close(s);
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return 0;
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}
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int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data,
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int alen)
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{
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int len = RTA_LENGTH(alen);
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struct rtattr *rta;
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if (NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(len) > maxlen) {
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fprintf(stderr, "addattr_l ERROR: message exceeded bound of %d\n",
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maxlen);
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return -1;
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}
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rta = NLMSG_TAIL(n);
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rta->rta_type = type;
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rta->rta_len = len;
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memcpy(RTA_DATA(rta), data, alen);
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n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(len);
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return 0;
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}
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