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Make tools/getifaddrs output closer to ifconfig #1434

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239 changes: 118 additions & 121 deletions tool/viz/getifaddrs.c
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,9 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/fmt/itoa.h"
#include "libc/intrin/bsr.h"
#include "libc/intrin/newbie.h"
#include "libc/limits.h"
#include "libc/runtime/runtime.h"
#include "libc/sock/ifaddrs.h"
#include "libc/sock/sock.h"
Expand All @@ -29,17 +32,23 @@
#include "libc/sysv/consts/iff.h"

/* example output:

eth0
addr: 10.10.10.237
netmask: 255.255.255.0
broadcast: 10.10.10.255
flags: IFF_UP IFF_BROADCAST IFF_MULTICAST IFF_RUNNING

lo
addr: 127.0.0.1
netmask: 255.0.0.0
flags: IFF_UP IFF_LOOPBACK IFF_RUNNING */
vnet0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>
inet6 fe80::fc54:ff:fefe:70d prefixlen 64 flags<128> class 0x20<link> ifidx 38
vnet1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>
inet6 fe80::fc54:ff:fe6a:6545 prefixlen 64 flags<128> class 0x20<link> ifidx 44
enp51s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>
inet6 fe80::ce3f:bd13:34ea:c170 prefixlen 64 flags<128> class 0x20<link> ifidx 43
inet 192.168.1.2 netmask 255.255.255.0 broadcast 192.168.1.255
wlp0s20f3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>
inet6 fe80::9e1f:6462:15e2:2bf7 prefixlen 64 flags<128> class 0x20<link> ifidx 3
inet 192.168.1.95 netmask 255.255.255.0 broadcast 192.168.1.255
lo: flags=73<UP,RUNNING,LOOPBACK>
inet6 ::1 prefixlen 128 flags<128> class 0x10<host>
inet 127.0.0.1 netmask 255.0.0.0
virbr1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>
inet 192.168.121.1 netmask 255.255.255.0 broadcast 192.168.121.255
virbr0: flags=4099<UP,BROADCAST,MULTICAST>
inet 192.168.122.1 netmask 255.255.255.0 broadcast 192.168.122.255 */

const char *sockaddr2str(const struct sockaddr *sa, char *buf, size_t size) {
if (sa->sa_family == AF_INET) {
Expand All @@ -53,133 +62,121 @@ const char *sockaddr2str(const struct sockaddr *sa, char *buf, size_t size) {
}
}

int main(int argc, char *argv[]) {

// get network interface list
struct ifaddrs *ifaddrs;
if (getifaddrs(&ifaddrs)) {
perror("getifaddrs");
exit(1);
}

// print network interface list
for (struct ifaddrs *ifa = ifaddrs; ifa; ifa = ifa->ifa_next) {
tinyprint(1, ifa->ifa_name, "\n", NULL);

char buf[128];
void print_ifaddr(struct ifaddrs *ifa) {
char buf[128];
if (ifa->ifa_addr->sa_family == AF_INET) {
if (sockaddr2str(ifa->ifa_addr, buf, sizeof(buf))) {
tinyprint(1, "addr: ", buf, "\n", NULL);
tinyprint(1, " inet ", buf, NULL);
}
if (sockaddr2str(ifa->ifa_netmask, buf, sizeof(buf))) {
tinyprint(1, "netmask: ", buf, "\n", NULL);
tinyprint(1, " netmask ", buf, NULL);
}
if ((ifa->ifa_flags & IFF_BROADCAST) &&
sockaddr2str(ifa->ifa_broadaddr, buf, sizeof(buf))) {
tinyprint(1, "broadcast: ", buf, "\n", NULL);
tinyprint(1, " broadcast ", buf, NULL);
} else if ((ifa->ifa_flags & IFF_POINTOPOINT) &&
sockaddr2str(ifa->ifa_dstaddr, buf, sizeof(buf))) {
tinyprint(1, "dstaddr: ", buf, "\n", NULL);
tinyprint(1, " dstaddr ", buf, NULL);
}
} else if (ifa->ifa_addr->sa_family == AF_INET6) {
if (sockaddr2str(ifa->ifa_addr, buf, sizeof(buf))) {
tinyprint(1, " inet6 ", buf, 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
uint128_t netmask = ~be128toh(*((uint128_t *)(&(
((const struct sockaddr_in6 *)ifa->ifa_netmask)->sin6_addr))));
int prefixlen = 128;
if (netmask > 0) {
uint64_t hi = (uint64_t)(netmask >> 64);
prefixlen = (hi > 0) ? (63 - bsrl(hi)) : (127 - bsrl((uint64_t)netmask));
}

// #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);
FormatUint64(buf, prefixlen);
tinyprint(1, " prefixlen ", buf, 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);
}
int aflags = ((int *)ifa->ifa_data)[1];
FormatUint64(buf, aflags);
tinyprint(1, " flags<", buf, ">", NULL);

tinyprint(1, "flags:", NULL);
if (ifa->ifa_flags & IFF_UP) {
tinyprint(1, " IFF_UP", NULL);
}
if (ifa->ifa_flags & IFF_DEBUG) {
tinyprint(1, " IFF_DEBUG", NULL);
}
if (ifa->ifa_flags & IFF_LOOPBACK) {
tinyprint(1, " IFF_LOOPBACK", NULL);
}
if (ifa->ifa_flags & IFF_MULTICAST) {
tinyprint(1, " IFF_MULTICAST", NULL);
int scope = ((((int *)ifa->ifa_data)[0]) / 16) % 5;
// #define IPV6_ADDR_GLOBAL 0x0000U
// #define IPV6_ADDR_LOOPBACK 0x0010U
// #define IPV6_ADDR_LINKLOCAL 0x0020U
// #define IPV6_ADDR_SITELOCAL 0x0040U
char *addr_types[] = {"global", "host", "link", "??", "site"};
buf[0] = '0' + scope;
buf[1] = '\0';
tinyprint(1, " class 0x", buf, "0<", addr_types[scope], ">", NULL);

if (scope == 2 || scope == 4) { // linklocal or sitelocal
FormatUint64(buf,
((const struct sockaddr_in6 *)ifa->ifa_addr)->sin6_scope_id);
tinyprint(1, " ifidx ", buf, NULL);
}
if (ifa->ifa_flags & IFF_ALLMULTI) {
tinyprint(1, " IFF_ALLMULTI", NULL);
}
tinyprint(1, "\n", NULL);
}
void print_iface(struct ifaddrs *ifa) {
char buf[32];
FormatUint64(buf, ifa->ifa_flags);
tinyprint(1, ifa->ifa_name, ": flags=", buf, "<", NULL);
char *sflags[] = {"UP", "BROADCAST", "POINTOPOINT", "RUNNING",
"DEBUG", "LOOPBACK", "MULTICAST", "ALLMULTI",
"NOARP", "IPROMISC"};
int iflags[] = {IFF_UP, IFF_BROADCAST, IFF_POINTOPOINT, IFF_RUNNING,
IFF_DEBUG, IFF_LOOPBACK, IFF_MULTICAST, IFF_ALLMULTI,
IFF_NOARP, IFF_PROMISC};
int first = 1;
for (int i = 0; i < (sizeof(sflags) / sizeof(*sflags)); i++) {
if (ifa->ifa_flags & iflags[i]) {
if (!first) {
tinyprint(1, ",", NULL);
}
first = 0;
tinyprint(1, sflags[i], NULL);
}
if (ifa->ifa_flags & IFF_NOARP) {
tinyprint(1, " IFF_NOARP", NULL);
}
tinyprint(1, ">\n", NULL);
}

int main(int argc, char *argv[]) {
// get network interface list
struct ifaddrs *ifaddrs;
if (getifaddrs(&ifaddrs)) {
perror("getifaddrs");
exit(1);
}

struct ifaddrs *ifaddrs_next_if = ifaddrs;
struct ifaddrs *ifaddrs_curr_if = NULL;
struct ifaddrs *ifa = NULL;
int first = 1;
// print network interface list
while (ifa || ifaddrs_next_if) {
if (!ifa) {
if (!first) {
tinyprint(1, "\n", NULL);
first = 0;
}
ifaddrs_curr_if = ifaddrs_next_if;
ifa = ifaddrs_next_if;
ifaddrs_next_if = NULL;
print_iface(ifa);
}
if (ifa->ifa_flags & IFF_PROMISC) {
tinyprint(1, " IFF_PROMISC", NULL);
if (strcmp(ifa->ifa_name, ifaddrs_curr_if->ifa_name)) {
if (!ifaddrs_next_if) {
struct ifaddrs *ifa2 = ifaddrs;
while (ifa2 != ifa && strcmp(ifa->ifa_name, ifa2->ifa_name)) {
ifa2 = ifa2->ifa_next;
}
if (ifa2 == ifa) {
ifaddrs_next_if = ifa;
}
}
} else {
print_ifaddr(ifa);
}
tinyprint(1, "\n", NULL);

tinyprint(1, "\n", NULL);
ifa = ifa->ifa_next;
}

// perform cleanup
Expand Down