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authorBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2008-10-21 12:42:45 +0000
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2008-10-21 12:42:45 +0000
commit8fbd8ac8ddad83f7ea724f12a1f5e6bf4af50f88 (patch)
tree161401339554a4326c5ad2fe8f75b8b442e29b6a /networking/libiproute/utils.c
parent7effd7ae99b2288452762f29cde8311ec72c2cb8 (diff)
downloadbusybox-8fbd8ac8ddad83f7ea724f12a1f5e6bf4af50f88.tar.gz
- fix ip route rejecting dotted quads as prefix
- adjust error message for wrong prefix not to mention address Previously e.g. ip route add 127.0.0.0/255.0.0.0 dev dummy0 was rejected, saying ip: an inet address is expected rather than "127.0.0.0/255.0.0.0" function old new delta get_prefix_1 201 309 +108 get_prefix 55 73 +18 get_addr 55 73 +18 get_addr32 48 58 +10 get_addr_1 249 204 -45 .rodata 114569 114524 -45 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 4/2 up/down: 154/-90) Total: 64 bytes
Diffstat (limited to 'networking/libiproute/utils.c')
-rw-r--r--networking/libiproute/utils.c64
1 files changed, 33 insertions, 31 deletions
diff --git a/networking/libiproute/utils.c b/networking/libiproute/utils.c
index 706710e1f..cd101f176 100644
--- a/networking/libiproute/utils.c
+++ b/networking/libiproute/utils.c
@@ -115,10 +115,6 @@ int get_s8(int8_t * val, char *arg, int base)
int get_addr_1(inet_prefix * addr, char *name, int family)
{
- char *cp;
- unsigned char *ap = (unsigned char *) addr->data;
- int i;
-
memset(addr, 0, sizeof(*addr));
if (strcmp(name, bb_str_default) == 0 ||
@@ -143,24 +139,17 @@ int get_addr_1(inet_prefix * addr, char *name, int family)
addr->family = AF_INET;
if (family != AF_UNSPEC && family != AF_INET)
return -1;
+ if (inet_pton(AF_INET, name, addr->data) <= 0)
+ return -1;
addr->bytelen = 4;
addr->bitlen = -1;
- for (cp = name, i = 0; *cp; cp++) {
- if (*cp <= '9' && *cp >= '0') {
- ap[i] = 10 * ap[i] + (*cp - '0');
- continue;
- }
- if (*cp == '.' && ++i <= 3)
- continue;
- return -1;
- }
return 0;
}
int get_prefix_1(inet_prefix * dst, char *arg, int family)
{
int err;
- int plen;
+ unsigned plen;
char *slash;
memset(dst, 0, sizeof(*dst));
@@ -177,23 +166,36 @@ int get_prefix_1(inet_prefix * dst, char *arg, int family)
*slash = '\0';
err = get_addr_1(dst, arg, family);
if (err == 0) {
- switch (dst->family) {
- case AF_INET6:
- dst->bitlen = 128;
- break;
- default:
- case AF_INET:
- dst->bitlen = 32;
- }
+ dst->bitlen = (dst->family == AF_INET6) ? 128 : 32;
if (slash) {
- if (get_integer(&plen, slash + 1, 0) || plen > dst->bitlen) {
+ inet_prefix netmask_pfx;
+
+ netmask_pfx.family = AF_UNSPEC;
+ if ((get_unsigned(&plen, slash + 1, 0) || plen > dst->bitlen)
+ && (get_addr_1(&netmask_pfx, slash + 1, family)))
err = -1;
- goto done;
+ else if (netmask_pfx.family == AF_INET) {
+ /* fill in prefix length of dotted quad */
+ uint32_t mask = ntohl(netmask_pfx.data[0]);
+ uint32_t host = ~mask;
+
+ /* a valid netmask must be 2^n - 1 */
+ if (!(host & (host + 1))) {
+ for (plen = 0; mask; mask <<= 1)
+ ++plen;
+ if (plen >= 0 && plen <= dst->bitlen) {
+ dst->bitlen = plen;
+ /* dst->flags |= PREFIXLEN_SPECIFIED; */
+ } else
+ err = -1;
+ } else
+ err = -1;
+ } else {
+ /* plain prefix */
+ dst->bitlen = plen;
}
- dst->bitlen = plen;
}
}
- done:
if (slash)
*slash = '/';
return err;
@@ -202,10 +204,10 @@ int get_prefix_1(inet_prefix * dst, char *arg, int family)
int get_addr(inet_prefix * dst, char *arg, int family)
{
if (family == AF_PACKET) {
- bb_error_msg_and_die("\"%s\" may be inet address, but it is not allowed in this context", arg);
+ bb_error_msg_and_die("\"%s\" may be inet %s, but it is not allowed in this context", arg, "address");
}
if (get_addr_1(dst, arg, family)) {
- bb_error_msg_and_die("an inet address is expected rather than \"%s\"", arg);
+ bb_error_msg_and_die("an %s %s is expected rather than \"%s\"", "inet", "address", arg);
}
return 0;
}
@@ -213,10 +215,10 @@ int get_addr(inet_prefix * dst, char *arg, int family)
int get_prefix(inet_prefix * dst, char *arg, int family)
{
if (family == AF_PACKET) {
- bb_error_msg_and_die("\"%s\" may be inet address, but it is not allowed in this context", arg);
+ bb_error_msg_and_die("\"%s\" may be inet %s, but it is not allowed in this context", arg, "prefix");
}
if (get_prefix_1(dst, arg, family)) {
- bb_error_msg_and_die("an inet address is expected rather than \"%s\"", arg);
+ bb_error_msg_and_die("an %s %s is expected rather than \"%s\"", "inet", "prefix", arg);
}
return 0;
}
@@ -226,7 +228,7 @@ uint32_t get_addr32(char *name)
inet_prefix addr;
if (get_addr_1(&addr, name, AF_INET)) {
- bb_error_msg_and_die("an IP address is expected rather than \"%s\"", name);
+ bb_error_msg_and_die("an %s %s is expected rather than \"%s\"", "IP", "address", name);
}
return addr.data[0];
}