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Implement IPV6_MULTICAST_IF socket option

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Implements the IPV6_MULTICAST_IF socket option, which
specifies the interface for outgoing multicast packets.

Based on work from https://savannah.nongnu.org/patch/?9554

Co-authored-by: Christina Schoenrogge <christina.schoenrogge@garmin.com>
Co-authored-by: Chee Bin Hoh <hohcheebin@gmail.com>
Co-authored-by: hanhui <hanhui03@163.com>
This commit is contained in:
Nate Karstens 2023-05-10 09:58:30 -05:00
parent 64b758d00c
commit d96a90a5ec
2 changed files with 18 additions and 0 deletions
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16
src/api/sockets.c
View File

@ -3181,6 +3181,14 @@ lwip_getsockopt_impl(int s, int level, int optname, void *optval, socklen_t *opt
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IPV6, IPV6_V6ONLY) = %d\n",
s, *(int *)optval));
break;
#if LWIP_MULTICAST_TX_OPTIONS && LWIP_UDP
case IPV6_MULTICAST_IF:
LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, *optlen, int, NETCONN_UDP);
*(int *)optval = udp_get_multicast_netif_index(sock->conn->pcb.udp);
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IPV6, IPV6_MULTICAST_IF) = %d\n",
s, *(int *)optval));
break;
#endif /* LWIP_MULTICAST_TX_OPTIONS && LWIP_UDP */
default:
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IPV6, UNIMPL: optname=0x%x, ..)\n",
s, optname));
@ -3668,6 +3676,14 @@ lwip_setsockopt_impl(int s, int level, int optname, const void *optval, socklen_
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IPV6, IPV6_V6ONLY, ..) -> %d\n",
s, (netconn_get_ipv6only(sock->conn) ? 1 : 0)));
break;
#if LWIP_MULTICAST_TX_OPTIONS && LWIP_UDP
case IPV6_MULTICAST_IF:
LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, int, NETCONN_UDP);
udp_set_multicast_netif_index(sock->conn->pcb.udp, (u8_t)(*(int *)optval));
LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IPV6, IPV6_MULTICAST_IF, ..) -> %d\n",
s, *(int *)optval));
break;
#endif /* LWIP_MULTICAST_TX_OPTIONS && LWIP_UDP */
#if LWIP_IPV6_MLD
case IPV6_JOIN_GROUP:
case IPV6_LEAVE_GROUP: {

2
src/include/lwip/sockets.h
View File

@ -317,6 +317,8 @@ struct linger {
#define IP_MULTICAST_TTL 5
#define IP_MULTICAST_IF 6
#define IP_MULTICAST_LOOP 7
#define IPV6_MULTICAST_IF 17 /* RFC3493: interface for outgoing multicast packets */
#endif /* LWIP_MULTICAST_TX_OPTIONS */
#if LWIP_IGMP