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authorMike Frysinger <vapier@gentoo.org>2005-01-06 04:02:00 +0000
committerMike Frysinger <vapier@gentoo.org>2005-01-06 04:02:00 +0000
commit7c23a63553c768bd9834ce60f9f4e638d79c5569 (patch)
tree993427a4c1c426cc418cdae781e024eb5f78b1f1 /libc
parent7334cfc680d557f2385c98d1b2a4f114955d5049 (diff)
Document more things inet_aton() 'should' support but actually doesn't.
Most of the time, no one ever notices, so there's not point eh ? Also standardize tab usage.
Diffstat (limited to 'libc')
-rw-r--r--libc/inet/addr.c60
1 files changed, 38 insertions, 22 deletions
diff --git a/libc/inet/addr.c b/libc/inet/addr.c
index 75ebc191e..5c4005a18 100644
--- a/libc/inet/addr.c
+++ b/libc/inet/addr.c
@@ -28,6 +28,22 @@
int inet_aton(const char *cp, struct in_addr *addrptr);
#ifdef L_inet_aton
+/*
+ * More undocumented inet_aton features.
+ * (read: uclibc doesnt support but glibc does)
+ * http://www.mkssoftware.com/docs/man3/inet_aton.3.asp
+ *
+ * *cp can take the form of:
+ * a.b.c.d - {a,b,c,d} -> 1 byte
+ * a.b.c - {a,b} -> 1 byte {c} -> 2 bytes
+ * a.b - {a} -> 1 byte {b} -> 3 bytes
+ * a - {a} -> 4 bytes
+ *
+ * Each part may be decimal, octal, or hexadecimal as in ISO C.
+ * 0x or 0X -> hexadecimal
+ * leading 0 -> octal
+ * all else -> decimal
+ */
int inet_aton(cp, addrptr)
const char *cp;
struct in_addr *addrptr;
@@ -71,7 +87,7 @@ struct in_addr *addrptr;
* of the input string, but does not store the result.
*/
if (addrptr) {
- addrptr->s_addr = htonl(addr);
+ addrptr->s_addr = htonl(addr);
}
return 1;
@@ -99,7 +115,7 @@ char *inet_ntoa_r(struct in_addr in, char buf[INET_NTOA_MAX_LEN])
in_addr_t addr = ntohl(in.s_addr);
int i;
char *p, *q;
-
+
q = 0;
p = buf + INET_NTOA_MAX_LEN - 1; /* cannot use sizeof(buf) here */
for (i=0 ; i < 4 ; i++ ) {
@@ -128,18 +144,18 @@ char *inet_ntoa(struct in_addr in)
*/
struct in_addr inet_makeaddr(in_addr_t net, in_addr_t host)
{
- in_addr_t addr;
-
- if (net < 128)
- addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
- else if (net < 65536)
- addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
- else if (net < 16777216UL)
- addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
- else
- addr = net | host;
- addr = htonl(addr);
- return (*(struct in_addr *)&addr);
+ in_addr_t addr;
+
+ if (net < 128)
+ addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
+ else if (net < 65536)
+ addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
+ else if (net < 16777216UL)
+ addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
+ else
+ addr = net | host;
+ addr = htonl(addr);
+ return (*(struct in_addr *)&addr);
}
#endif
@@ -172,14 +188,14 @@ in_addr_t inet_lnaof(struct in_addr in)
in_addr_t
inet_netof(struct in_addr in)
{
- in_addr_t i = ntohl(in.s_addr);
-
- if (IN_CLASSA(i))
- return (((i)&IN_CLASSA_NET) >> IN_CLASSA_NSHIFT);
- else if (IN_CLASSB(i))
- return (((i)&IN_CLASSB_NET) >> IN_CLASSB_NSHIFT);
- else
- return (((i)&IN_CLASSC_NET) >> IN_CLASSC_NSHIFT);
+ in_addr_t i = ntohl(in.s_addr);
+
+ if (IN_CLASSA(i))
+ return (((i)&IN_CLASSA_NET) >> IN_CLASSA_NSHIFT);
+ else if (IN_CLASSB(i))
+ return (((i)&IN_CLASSB_NET) >> IN_CLASSB_NSHIFT);
+ else
+ return (((i)&IN_CLASSC_NET) >> IN_CLASSC_NSHIFT);
}
#endif