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-rw-r--r--toys/other/ifconfig.c36
1 files changed, 24 insertions, 12 deletions
diff --git a/toys/other/ifconfig.c b/toys/other/ifconfig.c
index 59d1574d..15d00d06 100644
--- a/toys/other/ifconfig.c
+++ b/toys/other/ifconfig.c
@@ -64,16 +64,20 @@ struct ifreq_inet6 {
};
// Convert hostname to binary address for AF_INET or AF_INET6
-void get_addrinfo(char *host, sa_family_t af, void *addr)
+// return /prefix (or range max if none)
+int get_addrinfo(char *host, sa_family_t af, void *addr)
{
struct addrinfo hints, *result, *rp = 0;
int status, len;
- char *from;
+ char *from, *slash;
memset(&hints, 0 , sizeof(struct addrinfo));
hints.ai_family = af;
hints.ai_socktype = SOCK_STREAM;
+ slash = strchr(host, '/');
+ if (slash) *slash = 0;
+
status = getaddrinfo(host, NULL, &hints, &result);
if (!status)
for (rp = result; rp; rp = rp->ai_next)
@@ -89,6 +93,11 @@ void get_addrinfo(char *host, sa_family_t af, void *addr)
} else len = 4;
memcpy(addr, from, len);
freeaddrinfo(result);
+
+ len = -1;
+ if (slash) len = atolx_range(slash+1, 0, (af == AF_INET) ? 128 : 32);
+
+ return len;
}
static void display_ifconfig(char *name, int always, unsigned long long val[])
@@ -443,21 +452,15 @@ void ifconfig_main(void)
unsigned prefix;
int index;
} ifre6;
- int plen = 128, fd6 = xsocket(AF_INET6, SOCK_DGRAM, 0);
- char *prefix;
+ int plen, fd6 = xsocket(AF_INET6, SOCK_DGRAM, 0);
if (!argv[1]) {
toys.exithelp++;
error_exit(*argv);
}
- prefix = strchr(argv[1], '/');
- if (prefix) {
- plen = atolx_range(prefix+1, 0, 128);
- *prefix = 0;
- }
-
- get_addrinfo(argv[1], AF_INET6, &ifre6.addr);
+ plen = get_addrinfo(argv[1], AF_INET6, &ifre6.addr);
+ if (plen < 0) plen = 128;
xioctl(fd6, SIOCGIFINDEX, &ifre);
ifre6.index = ifre.ifr_ifindex;
ifre6.prefix = plen;
@@ -491,12 +494,21 @@ void ifconfig_main(void)
break;
} else if (t->name || !strchr(ifre.ifr_name, ':')) {
struct sockaddr_in *si = (struct sockaddr_in *)&ifre.ifr_addr;
+ int mask = -1;
si->sin_family = AF_INET;
if (!strcmp(*argv, "default")) si->sin_addr.s_addr = INADDR_ANY;
- else get_addrinfo(*argv, AF_INET, &si->sin_addr);
+ else mask = get_addrinfo(*argv, AF_INET, &si->sin_addr);
xioctl(TT.sockfd, off, &ifre);
+
+ // Handle /netmask
+ if (mask >= 0) {
+ // sin_addr probably isn't unaligned, but just in case...
+ mask = htonl((~0)<<(32-mask));
+ memcpy(&si->sin_addr, &mask, 4);
+ xioctl(TT.sockfd, SIOCSIFNETMASK, &ifre);
+ }
}
}
off = 0;