zhhyu7 opened a new pull request, #17551:
URL: https://github.com/apache/nuttx/pull/17551
## Summary
Some third-party network libraries use PACKET_ADD_MEMBERSHIP to add MAC
addresses to devices, and this patch can add support for this.
## Impact
net/pkt: setsockopt
## Testing
sim:matter with below test code:
```
#include <nuttx/config.h>
#include <net/if.h>
#include <netinet/if_ether.h>
#include <netpacket/packet.h>
#include <string.h>
#include <stdio.h>
int main(int argc, FAR char *argv[])
{
int fd;
int res;
struct packet_mreq mreq;
char macaddr[ETH_ALEN] = {0x91, 0xe0, 0xf0, 0x00, 0x0e, 0x01};
fd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (fd < 0) {
perror("Failed to open socket");
return -1;
}
mreq.mr_ifindex = 1; // eth0
mreq.mr_type = PACKET_MR_MULTICAST;
mreq.mr_alen = ETH_ALEN;
memcpy(&mreq.mr_address, macaddr, ETH_ALEN);
res = setsockopt(fd, SOL_PACKET, PACKET_ADD_MEMBERSHIP,
&mreq, sizeof(struct packet_mreq));
if (res < 0) {
perror("Couldn't set PACKET_ADD_MEMBERSHIP");
} else {
printf("Successfully set PACKET_ADD_MEMBERSHIP\n");
}
close(fd);
return res;
}
```
NuttX test log
```
NuttShell (NSH) NuttX-12.11.0
MOTD: username=admin password=Administrator
nsh> ifconfig
eth0 Link encap:Ethernet HWaddr 42:e1:c4:3f:48:dd at RUNNING mtu 1500
inet addr:10.0.1.2 DRaddr:10.0.0.1 Mask:255.255.255.0
inet6 addr: fe80::40e1:c4ff:fe3f:48dd/64
inet6 DRaddr: ::
nsh> hello
Successfully set PACKET_ADD_MEMBERSHIP
nsh>
```
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