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When specifying an interface to ifconfig, first look up the interface

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index, then retrieve statistics for that index, rather than retrieving
all interfaces and then looking for a matching name.  This allows the
user to refer to an interface via an alias name.

While I'm here, also perform a few assorted cleanups.
This commit is contained in:
Jonathan Lemon 2001-10-17 18:30:13 +00:00
parent 8071913df2
commit 1643c8f3eb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=85075
1 changed files with 11 additions and 25 deletions
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36
sbin/ifconfig/ifconfig.c
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@ -421,15 +421,13 @@ main(argc, argv)
{ {
int c; int c;
int all, namesonly, downonly, uponly; int all, namesonly, downonly, uponly;
int foundit = 0, need_nl = 0; int need_nl = 0;
const struct afswtch *afp = 0; const struct afswtch *afp = 0;
int addrcount; int addrcount, ifindex;
struct if_msghdr *ifm, *nextifm; struct if_msghdr *ifm, *nextifm;
struct ifa_msghdr *ifam; struct ifa_msghdr *ifam;
struct sockaddr_dl *sdl; struct sockaddr_dl *sdl;
char *buf, *lim, *next; char *buf, *lim, *next;
size_t needed; size_t needed;
int mib[6]; int mib[6];
@ -499,6 +497,7 @@ main(argc, argv)
if (argc > 1) if (argc > 1)
usage(); usage();
ifindex = 0;
if (argc == 1) { if (argc == 1) {
for (afp = afs; afp->af_name; afp++) for (afp = afs; afp->af_name; afp++)
if (strcmp(afp->af_name, *argv) == 0) { if (strcmp(afp->af_name, *argv) == 0) {
@ -532,6 +531,9 @@ main(argc, argv)
if (argc == 0) if (argc == 0)
exit(0); exit(0);
} }
ifindex = if_nametoindex(name);
if (ifindex == 0)
errx(1, "interface %s does not exist", name);
} }
/* Check for address family */ /* Check for address family */
@ -548,9 +550,9 @@ main(argc, argv)
mib[0] = CTL_NET; mib[0] = CTL_NET;
mib[1] = PF_ROUTE; mib[1] = PF_ROUTE;
mib[2] = 0; mib[2] = 0;
mib[3] = 0; /* address family */ mib[3] = 0; /* address family */
mib[4] = NET_RT_IFLIST; mib[4] = NET_RT_IFLIST;
mib[5] = 0; mib[5] = ifindex; /* interface index */
/* if particular family specified, only ask about it */ /* if particular family specified, only ask about it */
if (afp) if (afp)
@ -598,6 +600,8 @@ main(argc, argv)
addrcount++; addrcount++;
next += nextifm->ifm_msglen; next += nextifm->ifm_msglen;
} }
strncpy(name, sdl->sdl_data, sdl->sdl_nlen);
name[sdl->sdl_nlen] = '\0';
if (all || namesonly) { if (all || namesonly) {
if (uponly) if (uponly)
@ -606,8 +610,6 @@ main(argc, argv)
if (downonly) if (downonly)
if (flags & IFF_UP) if (flags & IFF_UP)
continue; /* not down */ continue; /* not down */
strncpy(name, sdl->sdl_data, sdl->sdl_nlen);
name[sdl->sdl_nlen] = '\0';
if (namesonly) { if (namesonly) {
if (afp == NULL || if (afp == NULL ||
afp->af_status != ether_status || afp->af_status != ether_status ||
@ -619,36 +621,21 @@ main(argc, argv)
} }
continue; continue;
} }
} else {
if (strlen(name) != sdl->sdl_nlen)
continue; /* not same len */
if (strncmp(name, sdl->sdl_data, sdl->sdl_nlen) != 0)
continue; /* not same name */
} }
if (argc > 0) if (argc > 0)
ifconfig(argc, argv, afp); ifconfig(argc, argv, afp);
else else
status(afp, addrcount, sdl, ifm, ifam); status(afp, addrcount, sdl, ifm, ifam);
if (all == 0 && namesonly == 0) {
foundit++; /* flag it as 'done' */
break;
}
} }
free(buf); free(buf);
if (namesonly && need_nl > 0) if (namesonly && need_nl > 0)
putchar('\n'); putchar('\n');
if (all == 0 && namesonly == 0 && foundit == 0)
errx(1, "interface %s does not exist", name);
exit (0); exit (0);
} }
int int
ifconfig(argc, argv, afp) ifconfig(argc, argv, afp)
int argc; int argc;
@ -1144,7 +1131,7 @@ status(afp, addrcount, sdl, ifm, ifam)
allfamilies = 0; allfamilies = 0;
ifr.ifr_addr.sa_family = afp->af_af == AF_LINK ? AF_INET : afp->af_af; ifr.ifr_addr.sa_family = afp->af_af == AF_LINK ? AF_INET : afp->af_af;
strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name); strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0) if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0)
err(1, "socket"); err(1, "socket");
@ -1962,7 +1949,6 @@ ifmaybeload(name)
int fileid, modid; int fileid, modid;
char ifkind[35], *cp, *dp; char ifkind[35], *cp, *dp;
/* turn interface and unit into module name */ /* turn interface and unit into module name */
strcpy(ifkind, "if_"); strcpy(ifkind, "if_");
for (cp = name, dp = ifkind + 3; for (cp = name, dp = ifkind + 3;