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zebra: Increase recvmsg buffer size for picking up netlink messages

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Netlink messages from the kernel need to be received in a buffer larger
than 8K in order to handle some types of info - for example, the VLAN
information. Define a separate size for receive and set it to 32K, which
is the value used by other netlink receivers like iproute2.

Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Reviewed-by:   Donald Sharp <sharpd@cumulusnetworks.com>
This commit is contained in:
vivek 2018-04-20 08:40:42 -07:00 committed by Donald Sharp
parent 8cb73ba40d
commit 9ed7517b1a
2 changed files with 2 additions and 1 deletions
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2
zebra/kernel_netlink.c
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@ -463,7 +463,7 @@ int netlink_parse_info(int (*filter)(struct sockaddr_nl *, struct nlmsghdr *,
int read_in = 0;
while (1) {
char buf[NL_PKT_BUF_SIZE];
char buf[NL_RCV_PKT_BUF_SIZE];
struct iovec iov = {.iov_base = buf, .iov_len = sizeof buf};
struct sockaddr_nl snl;
struct msghdr msg = {.msg_name = (void *)&snl,

1
zebra/kernel_netlink.h
View File

@ -23,6 +23,7 @@
#ifdef HAVE_NETLINK
#define NL_RCV_PKT_BUF_SIZE 32768
#define NL_PKT_BUF_SIZE 8192
extern void netlink_parse_rtattr(struct rtattr **tb, int max,