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Add IPv6 support to getifaddrs() on Linux (#1415)
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This commit is contained in:
Hugues Morisset 2025-05-21 10:20:22 +02:00 • committed by GitHub
parent 2fe8338f92
commit f1e83d5240
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GPG key ID: B5690EEEBB952194
3 changed files with 256 additions and 33 deletions
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78
tool/viz/getifaddrs.c
View file

@ -33,7 +33,7 @@
eth0
addr: 10.10.10.237
netmask: 255.255.255.0
broadcast: 255.255.255.0
broadcast: 10.10.10.255
flags: IFF_UP IFF_BROADCAST IFF_MULTICAST IFF_RUNNING
lo
@ -74,13 +74,87 @@ int main(int argc, char *argv[]) {
tinyprint(1, "netmask: ", buf, "\n", NULL);
}
if ((ifa->ifa_flags & IFF_BROADCAST) &&
sockaddr2str(ifa->ifa_netmask, buf, sizeof(buf))) {
sockaddr2str(ifa->ifa_broadaddr, buf, sizeof(buf))) {
tinyprint(1, "broadcast: ", buf, "\n", NULL);
} else if ((ifa->ifa_flags & IFF_POINTOPOINT) &&
sockaddr2str(ifa->ifa_dstaddr, buf, sizeof(buf))) {
tinyprint(1, "dstaddr: ", buf, "\n", NULL);
}
if (ifa->ifa_addr->sa_family == AF_INET6) {
int scope = ((int *)ifa->ifa_data)[0];
int aflags = ((int *)ifa->ifa_data)[1];
// #define IPV6_ADDR_LOOPBACK 0x0010U
// #define IPV6_ADDR_LINKLOCAL 0x0020U
// #define IPV6_ADDR_SITELOCAL 0x0040U
// #define IFA_F_TEMPORARY 0x01
// #define IFA_F_NODAD 0x02
// #define IFA_F_OPTIMISTIC 0x04
// #define IFA_F_DADFAILED 0x08
// #define IFA_F_HOMEADDRESS 0x10
// #define IFA_F_DEPRECATED 0x20
// #define IFA_F_TENTATIVE 0x40
// #define IFA_F_PERMANENT 0x80
// #define IFA_F_MANAGETEMPADDR 0x100
// #define IFA_F_NOPREFIXROUTE 0x200
// #define IFA_F_MCAUTOJOIN 0x400
// #define IFA_F_STABLE_PRIVACY 0x800
tinyprint(1, "scope:", NULL);
if (scope == 0x10) {
tinyprint(1, " loopback", NULL);
}
if (scope == 0x20) {
tinyprint(1, " linklocal", NULL);
}
if (scope == 0x40) {
tinyprint(1, " sitelocal", NULL);
}
if (scope == 0x00) {
tinyprint(1, " global", NULL);
}
tinyprint(1, "\n", NULL);
tinyprint(1, "addr flags:", NULL);
if (aflags & 0x01) {
tinyprint(1, " temporary", NULL);
}
if (aflags & 0x02) {
tinyprint(1, " nodad", NULL);
}
if (aflags & 0x04) {
tinyprint(1, " optimistic", NULL);
}
if (aflags & 0x08) {
tinyprint(1, " dadfailed", NULL);
}
if (aflags & 0x10) {
tinyprint(1, " homeaddress", NULL);
}
if (aflags & 0x20) {
tinyprint(1, " deprecated", NULL);
}
if (aflags & 0x40) {
tinyprint(1, " tentative", NULL);
}
if (aflags & 0x80) {
tinyprint(1, " permanent", NULL);
}
if (aflags & 0x100) {
tinyprint(1, " managetempaddr", NULL);
}
if (aflags & 0x200) {
tinyprint(1, " noprefixroute", NULL);
}
if (aflags & 0x400) {
tinyprint(1, " mcautojoin", NULL);
}
if (aflags & 0x800) {
tinyprint(1, " stable_privacy", NULL);
}
tinyprint(1, "\n", NULL);
}
tinyprint(1, "flags:", NULL);
if (ifa->ifa_flags & IFF_UP) {
tinyprint(1, " IFF_UP", NULL);