hardenedbsd/HardenedBSD
1
0
Fork 0
mirror of https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git synced 2025-01-11 17:04:19 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

Treat all interface aliases as local addresses.

Browse Source 
The new rtiparse() function should really be in libc IMHO.... I'm
sick of writing this code :-(

PR:	20381
This commit is contained in:
Brian Somers 2000-08-09 09:24:31 +00:00
parent 3ebdf3366d
commit 7bdb026118
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=64450
1 changed files with 40 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
usr.sbin/portmap/from_local.c
View File

@ -63,6 +63,7 @@ static const char rcsid[] =
#include <net/if.h>
#include <net/if_dl.h>
#include <net/route.h>
#include <netinet/in.h>
#include "pmap_check.h"
@ -72,12 +73,31 @@ static const char rcsid[] =
#define FALSE 0
#endif
#define ROUNDUP(x) ((x) ? (1 + (((x) - 1) | (sizeof(long) - 1))) : sizeof(long))
/* How many interfaces could there be on a computer? */
#define ESTIMATED_LOCAL 20
static int num_local = -1;
static struct in_addr *addrs;
static void
rtiparse(struct ifa_msghdr *ifam, struct rt_addrinfo *ai)
{
char *wp;
int rtax;
wp = (char *)(ifam + 1);
ai->rti_addrs = ifam->ifam_addrs;
for (rtax = 0; rtax < sizeof ai->rti_info / sizeof *ai->rti_info; rtax++)
if (ifam->ifam_addrs & (1 << rtax)) {
ai->rti_info[rtax] = (struct sockaddr *)wp;
wp += ROUNDUP(ai->rti_info[rtax]->sa_len);
} else
ai->rti_info[rtax] = NULL;
}
/* find_local - find all IP addresses for this host */
static int
@ -87,6 +107,8 @@ find_local()
size_t needed;
char *buf, *end, *ptr;
struct if_msghdr *ifm;
struct ifa_msghdr *ifam;
struct rt_addrinfo ai;
struct ifreq ifr;
struct sockaddr_dl *dl;
@ -129,7 +151,7 @@ find_local()
dl = (struct sockaddr_dl *)(ifm + 1);
if (ifm->ifm_index != dl->sdl_index || dl->sdl_nlen == 0)
/* We only want to see each interface once */
/* Skip over remaining ifa_msghdrs */
continue;
n = dl->sdl_nlen > sizeof ifr.ifr_name ?
@ -143,23 +165,26 @@ find_local()
fprintf(stderr, "%.*s: SIOCGIFFLAGS: %s\n", n, ifr.ifr_name,
strerror(errno));
else if (ifr.ifr_flags & IFF_UP) { /* active interface */
if (ioctl(s, SIOCGIFADDR, &ifr) < 0)
fprintf(stderr, "%.*s: SIOCGIFADDR: %s\n", n, ifr.ifr_name,
strerror(errno));
else {
if (alloced < num_local + 1) {
alloced += ESTIMATED_LOCAL;
if (addrs)
ifam = (struct ifa_msghdr *)(ptr + ifm->ifm_msglen);
while ((char *)ifam < end && ifam->ifam_type == RTM_NEWADDR) {
rtiparse(ifam, &ai);
if (ai.rti_info[RTAX_IFA] != NULL &&
ai.rti_info[RTAX_IFA]->sa_family == AF_INET) {
if (alloced < num_local + 1) {
alloced += ESTIMATED_LOCAL;
addrs = (struct in_addr *)realloc(addrs, alloced * sizeof addrs[0]);
else
addrs = (struct in_addr *)malloc(alloced * sizeof addrs[0]);
if (addrs == NULL) {
perror("malloc/realloc");
num_local = 0;
break;
if (addrs == NULL) {
perror("malloc/realloc");
num_local = 0;
break;
}
}
addrs[num_local++] = ((struct sockaddr_in *)
ai.rti_info[RTAX_IFA])->sin_addr;
}
addrs[num_local++] = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr;
ifam = (struct ifa_msghdr *)((char *)ifam + ifam->ifam_msglen);
}
}
}