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[lib] Add comments regarding setsockopt_multicast_ipv4 arguments.

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2007-07-06 Andrew J. Schorr <ajschorr@alumni.princeton.edu>

	* sockopt.{c,h}: (setsockopt_multicast_ipv4) Add some comments about
	  the arguments.
This commit is contained in:
Andrew J. Schorr 2007-07-06 17:00:24 +00:00
parent 0b8c4f1d81
commit 97cabcf760
3 changed files with 13 additions and 4 deletions
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5
lib/ChangeLog
View File

@ -1,3 +1,8 @@
2007-07-06 Andrew J. Schorr <ajschorr@alumni.princeton.edu>
* sockopt.{c,h}: (setsockopt_multicast_ipv4) Add some comments about
the arguments.
2007-06-01 Andrew J. Schorr <ajschorr@alumni.princeton.edu>
* zebra.h: On linux, we seem to need to include <linux/types.h> before

5
lib/sockopt.c
View File

@ -176,9 +176,10 @@ getsockopt_ipv6_ifindex (struct msghdr *msgh)
int
setsockopt_multicast_ipv4(int sock,
int optname,
struct in_addr if_addr,
struct in_addr if_addr /* required */,
unsigned int mcast_addr,
unsigned int ifindex)
unsigned int ifindex /* optional: if non-zero, may be
used instead of if_addr */)
{
#ifdef HAVE_STRUCT_IP_MREQN_IMR_IFINDEX

7
lib/sockopt.h
View File

@ -79,9 +79,12 @@ extern int setsockopt_ipv6_multicast_loop (int, int);
? SOPT_SIZE_CMSG_PKTINFO_IPV6())
extern int setsockopt_multicast_ipv4(int sock, int optname,
struct in_addr if_addr,
struct in_addr if_addr
/* required: interface to join on */,
unsigned int mcast_addr,
unsigned int ifindex);
unsigned int ifindex
/* optional: if non-zero, may be used
instead of if_addr */);
/* Ask for, and get, ifindex, by whatever method is supported. */
extern int setsockopt_ifindex (int, int, int);