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no error if can't get interfaces or netmask since networking may not be in

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the kernel.
This commit is contained in:
Todd C. Miller
1994-08-13 21:09:05 +00:00
parent e9114229c3
commit 20f8b1911a
1 changed files with 15 additions and 19 deletions
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34
sudo.c
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@@ -597,14 +597,12 @@ static void load_interfaces()
}
/*
* get interface configuration
* get interface configuration or return (leaving interfaces NULL)
*/
ifconf.ifc_len = sizeof(buf);
ifconf.ifc_buf = buf;
if (ioctl(sock, SIOCGIFCONF, (char *)(&ifconf)) < 0) {
(void) fprintf(stderr, "%s: cannot get interface configuration: ",
Argv[0]);
perror("");
/* networking probably not installed in kernel */
return;
}
@@ -649,23 +647,21 @@ static void load_interfaces()
/* get the netmask */
#ifdef SIOCGIFNETMASK
(void) strcpy(ifreq.ifr_name, ifconf.ifc_req[i].ifr_name);
if (ioctl(sock, SIOCGIFNETMASK, (char *)(&ifreq)) < 0) {
(void) free(interfaces);
num_interfaces = 0;
perror("");
return;
}
(void) memcpy(&interfaces[j].netmask,
&(((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr),
sizeof(struct in_addr));
if (ioctl(sock, SIOCGIFNETMASK, (char *)(&ifreq)) >= 0) {
(void) memcpy(&interfaces[j].netmask,
&(((struct sockaddr_in *)&ifreq.ifr_addr)->sin_addr),
sizeof(struct in_addr));
} else {
#else
if (IN_CLASSC(interfaces[j].addr.s_addr))
interfaces[j].netmask.s_addr = htonl(IN_CLASSC_NET);
else if (IN_CLASSB(interfaces[j].addr.s_addr))
interfaces[j].netmask.s_addr = htonl(IN_CLASSB_NET);
else
interfaces[j].netmask.s_addr = htonl(IN_CLASSA_NET);
{
#endif /* SIOCGIFNETMASK */
if (IN_CLASSC(interfaces[j].addr.s_addr))
interfaces[j].netmask.s_addr = htonl(IN_CLASSC_NET);
else if (IN_CLASSB(interfaces[j].addr.s_addr))
interfaces[j].netmask.s_addr = htonl(IN_CLASSB_NET);
else
interfaces[j].netmask.s_addr = htonl(IN_CLASSA_NET);
}
++j;
}
}