HedongGao opened a new pull request, #17700:
URL: https://github.com/apache/nuttx/pull/17700
## Summary
There is a compile warning information:
`ctc W597: ["/home/mi/code/dev-system/nuttx/libs/libc/net/lib_getifaddrs.c"
215/21] alignment of automatic object limited to 4`
In order to fix compilation issue, the struct ifreq structure is modified.
## Impact
There is no impact for user.
## Testing
`
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
int main(void)
{
int sockfd;
struct ifreq ifr;
unsigned int idx;
char name[IFNAMSIZ] = "eth0";
char namebuf[IFNAMSIZ];
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd < 0) {
perror("socket");
return 1;
}
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, name, IFNAMSIZ-1);
if (ioctl(sockfd, SIOCGIFINDEX, &ifr) < 0) {
perror("ioctl SIOCGIFINDEX");
close(sockfd);
return 1;
}
idx = ifr.ifr_ifindex;
printf("Interface %s has index %u\n", name, idx);
if (if_indextoname(idx, namebuf) == NULL) {
perror("if_indextoname");
close(sockfd);
return 1;
}
printf("Index %u corresponds to interface %s\n", idx, namebuf);
if (strncmp(name, namebuf, IFNAMSIZ) == 0) {
printf("Test PASSED: ifr_ifindex works as expected.\n");
} else {
printf("Test FAILED: name mismatch.\n");
}
close(sockfd);
return 0;
}
`
Result of test:
`
nsh> hello
Interface eth0 has index 1
Index 1 corresponds to interface eth0
Test PASSED: ifr_ifindex works as expected.
`
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