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net/setsockopt/IP_MULTICAST_TTL: add handles of different prototypes

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Reference here:
https://github.com/torvalds/linux/blob/b3298500b23f0b53a8d81e0d5ad98a29db71f4f0/net/ipv4/ip_sockglue.c#L923-L932

Change-Id: Iad67c756eb549d969bd7a8ffe965d9b1dcc56988
Signed-off-by: chao.an <anchao@xiaomi.com>
This commit is contained in:
chao.an
2020-12-05 17:33:29 +08:00
parent 49f50e7169
commit 46df08ba31
1 changed files with 18 additions and 16 deletions
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net/inet/ipv4_setsockopt.c
+18 -16
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@@ -192,38 +192,40 @@ int ipv4_setsockopt(FAR struct socket *psock, int option,
case IP_MULTICAST_TTL: /* Set/read the time-to-live value of
* outgoing multicast packets */
{
FAR struct udp_conn_s *conn;
int ttl;
if (psock->s_type != SOCK_DGRAM ||
value_len != sizeof(int))
value == NULL || value_len == 0)
{
ret = -EINVAL;
break;
}
ttl = (value_len >= sizeof(int)) ?
*(FAR int *)value : (int)*(FAR unsigned char *)value;
if (ttl <= 0 || ttl > 255)
{
ret = -EINVAL;
}
else
{
FAR struct udp_conn_s *conn;
int ttl = *(FAR int *)value;
if (ttl <= 0 || ttl > 255)
{
ret = -EINVAL;
}
else
{
conn = (FAR struct udp_conn_s *)psock->s_conn;
conn->ttl = ttl;
ret = OK;
}
conn = (FAR struct udp_conn_s *)psock->s_conn;
conn->ttl = ttl;
ret = OK;
}
}
break;
/* The following IPv4 socket options are defined, but not implemented */
case IP_MULTICAST_IF: /* Set local device for a multicast
* socket */
case IP_MULTICAST_LOOP: /* Set/read boolean that determines
* whether sent multicast packets
* should be looped back to local
* sockets. */
case IP_MULTICAST_IF: /* Set local device for a multicast
* socket */
case IP_UNBLOCK_SOURCE: /* Unblock previously blocked multicast
* source */
case IP_BLOCK_SOURCE: /* Stop receiving multicast data from