fastfetch-cli/fastfetch
1
0
Fork 0
mirror of https://github.com/fastfetch-cli/fastfetch.git synced 2026-09-13 02:42:09 +02:00
Code Issues Packages Projects Releases 10 Wiki Activity

Netif (Linux): add verbose logs

Browse Source
This commit is contained in:
李通洲
2025-08-16 15:12:44 +08:00
parent 41cffac80c
commit 597c6f3dbc
1 changed files with 61 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/common/netif/netif_linux.c
+61 -1
View File
@@ -1,6 +1,7 @@
#include "netif.h"
#include "common/io/io.h"
#include "util/mallocHelper.h"
#include "util/debug.h"
#include <arpa/inet.h>
#include <linux/rtnetlink.h>
@@ -11,11 +12,18 @@
bool ffNetifGetDefaultRouteImplV4(FFNetifDefaultRouteResult* result)
{
FF_DEBUG("Starting IPv4 default route detection");
FF_AUTO_CLOSE_FD int sock_fd = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE);
if (sock_fd < 0)
{
FF_DEBUG("Failed to create netlink socket: errno=%d", errno);
return false;
}
FF_DEBUG("Created netlink socket: fd=%d", sock_fd);
unsigned pid = (unsigned) getpid();
FF_DEBUG("Process PID: %u", pid);
// Bind socket
struct sockaddr_nl addr = {
@@ -25,8 +33,10 @@ bool ffNetifGetDefaultRouteImplV4(FFNetifDefaultRouteResult* result)
};
if (bind(sock_fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
FF_DEBUG("Failed to bind socket: errno=%d", errno);
return false;
}
FF_DEBUG("Successfully bound socket");
struct {
struct nlmsghdr nlh;
@@ -72,8 +82,10 @@ bool ffNetifGetDefaultRouteImplV4(FFNetifDefaultRouteResult* result)
(struct sockaddr*)&dest_addr, sizeof(dest_addr));
if (sent != sizeof(req)) {
FF_DEBUG("Failed to send netlink request: sent=%zd, expected=%zu", sent, sizeof(req));
return false;
}
FF_DEBUG("Sent netlink request: %zd bytes", sent);
struct sockaddr_nl src_addr = {};
socklen_t src_addr_len = sizeof(src_addr);
@@ -88,16 +100,20 @@ bool ffNetifGetDefaultRouteImplV4(FFNetifDefaultRouteResult* result)
ssize_t peek_size = recvmsg(sock_fd, &msg, MSG_PEEK | MSG_TRUNC);
if (peek_size < 0) {
FF_DEBUG("Failed to peek message size: errno=%d", errno);
return false;
}
FF_DEBUG("Message size: %zd bytes", peek_size);
FF_AUTO_FREE uint8_t* buffer = malloc((size_t)peek_size);
ssize_t received = recvfrom(sock_fd, buffer, (size_t)peek_size, 0,
(struct sockaddr*)&src_addr, &src_addr_len);
if (received != peek_size) {
FF_DEBUG("Failed to receive complete message: received=%zd, expected=%zd", received, peek_size);
return false;
}
FF_DEBUG("Received netlink response: %zd bytes", received);
struct {
uint32_t metric;
@@ -105,6 +121,7 @@ bool ffNetifGetDefaultRouteImplV4(FFNetifDefaultRouteResult* result)
uint32_t prefsrc;
} entry;
uint32_t minMetric = UINT32_MAX;
int routeCount = 0;
for (const struct nlmsghdr* nlh = (struct nlmsghdr*)buffer;
NLMSG_OK(nlh, received);
@@ -112,11 +129,15 @@ bool ffNetifGetDefaultRouteImplV4(FFNetifDefaultRouteResult* result)
if (nlh->nlmsg_seq != 1 || nlh->nlmsg_pid != pid)
continue;
if (nlh->nlmsg_type == NLMSG_DONE)
{
FF_DEBUG("Received NLMSG_DONE, processed %d routes", routeCount);
break;
}
if (nlh->nlmsg_type != RTM_NEWROUTE)
continue;
routeCount++;
struct rtmsg* rtm = (struct rtmsg*)NLMSG_DATA(nlh);
if (rtm->rtm_family != AF_INET)
continue;
@@ -124,6 +145,7 @@ bool ffNetifGetDefaultRouteImplV4(FFNetifDefaultRouteResult* result)
if (rtm->rtm_dst_len != 0)
continue;
FF_DEBUG("Processing IPv4 default route candidate #%d", routeCount);
entry = (__typeof__(entry)) { .metric = UINT32_MAX };
// Parse route attributes
@@ -138,20 +160,25 @@ bool ffNetifGetDefaultRouteImplV4(FFNetifDefaultRouteResult* result)
uint32_t rta_data = *(uint32_t*) RTA_DATA(rta);
switch (rta->rta_type) {
case RTA_DST:
FF_DEBUG("Found destination: %s", inet_ntoa(*(struct in_addr*)&rta_data));
if (rta_data != 0) goto next;
break;
case RTA_OIF:
entry.ifindex = rta_data;
FF_DEBUG("Found interface index: %u", entry.ifindex);
break;
case RTA_GATEWAY:
if (rta_data == 0) goto next;
FF_DEBUG("Found gateway: %s", inet_ntoa(*(struct in_addr*)&rta_data));
break;
case RTA_PRIORITY:
if (rta_data >= minMetric) goto next;
entry.metric = rta_data;
FF_DEBUG("Found metric: %u", entry.metric);
break;
case RTA_PREFSRC:
entry.prefsrc = rta_data;
FF_DEBUG("Found preferred source: %s", inet_ntoa(*(struct in_addr*)&rta_data));
break;
}
}
@@ -163,24 +190,34 @@ bool ffNetifGetDefaultRouteImplV4(FFNetifDefaultRouteResult* result)
}
minMetric = entry.metric;
result->ifIndex = entry.ifindex;
result->preferredSourceAddrV4 = entry.prefsrc;
FF_DEBUG("Updated best route: ifindex=%u, metric=%u", entry.ifindex, entry.metric);
// result->preferredSourceAddrV4 = entry.prefsrc;
}
if (minMetric < UINT32_MAX)
{
if_indextoname(result->ifIndex, result->ifName);
FF_DEBUG("Found default IPv4 route: interface=%s, index=%u, metric=%u", result->ifName, result->ifIndex, minMetric);
return true;
}
FF_DEBUG("No IPv4 default route found");
return false;
}
bool ffNetifGetDefaultRouteImplV6(FFNetifDefaultRouteResult* result)
{
FF_DEBUG("Starting IPv6 default route detection");
FF_AUTO_CLOSE_FD int sock_fd = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE);
if (sock_fd < 0)
{
FF_DEBUG("Failed to create netlink socket: errno=%d", errno);
return false;
}
FF_DEBUG("Created netlink socket: fd=%d", sock_fd);
unsigned pid = (unsigned) getpid();
FF_DEBUG("Process PID: %u", pid);
// Bind socket
struct sockaddr_nl addr = {
@@ -190,8 +227,10 @@ bool ffNetifGetDefaultRouteImplV6(FFNetifDefaultRouteResult* result)
};
if (bind(sock_fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
FF_DEBUG("Failed to bind socket: errno=%d", errno);
return false;
}
FF_DEBUG("Successfully bound socket");
struct {
struct nlmsghdr nlh;
@@ -237,8 +276,10 @@ bool ffNetifGetDefaultRouteImplV6(FFNetifDefaultRouteResult* result)
(struct sockaddr*)&dest_addr, sizeof(dest_addr));
if (sent != sizeof(req)) {
FF_DEBUG("Failed to send netlink request: sent=%zd, expected=%zu", sent, sizeof(req));
return false;
}
FF_DEBUG("Sent netlink request: %zd bytes", sent);
struct sockaddr_nl src_addr = {};
socklen_t src_addr_len = sizeof(src_addr);
@@ -253,22 +294,27 @@ bool ffNetifGetDefaultRouteImplV6(FFNetifDefaultRouteResult* result)
ssize_t peek_size = recvmsg(sock_fd, &msg, MSG_PEEK | MSG_TRUNC);
if (peek_size < 0) {
FF_DEBUG("Failed to peek message size: errno=%d", errno);
return false;
}
FF_DEBUG("Message size: %zd bytes", peek_size);
FF_AUTO_FREE uint8_t* buffer = malloc((size_t)peek_size);
ssize_t received = recvfrom(sock_fd, buffer, (size_t)peek_size, 0,
(struct sockaddr*)&src_addr, &src_addr_len);
if (received != peek_size) {
FF_DEBUG("Failed to receive complete message: received=%zd, expected=%zd", received, peek_size);
return false;
}
FF_DEBUG("Received netlink response: %zd bytes", received);
struct {
uint32_t metric;
uint32_t ifindex;
} entry;
uint32_t minMetric = UINT32_MAX;
int routeCount = 0;
for (const struct nlmsghdr* nlh = (struct nlmsghdr*)buffer;
NLMSG_OK(nlh, received);
@@ -276,11 +322,15 @@ bool ffNetifGetDefaultRouteImplV6(FFNetifDefaultRouteResult* result)
if (nlh->nlmsg_seq != 1 || nlh->nlmsg_pid != pid)
continue;
if (nlh->nlmsg_type == NLMSG_DONE)
{
FF_DEBUG("Received NLMSG_DONE, processed %d routes", routeCount);
break;
}
if (nlh->nlmsg_type != RTM_NEWROUTE)
continue;
routeCount++;
struct rtmsg* rtm = (struct rtmsg*)NLMSG_DATA(nlh);
if (rtm->rtm_family != AF_INET6)
continue;
@@ -288,6 +338,7 @@ bool ffNetifGetDefaultRouteImplV6(FFNetifDefaultRouteResult* result)
if (rtm->rtm_dst_len != 0)
continue;
FF_DEBUG("Processing IPv6 default route candidate #%d", routeCount);
entry = (__typeof__(entry)) { .metric = UINT32_MAX };
// Parse route attributes
@@ -299,6 +350,8 @@ bool ffNetifGetDefaultRouteImplV6(FFNetifDefaultRouteResult* result)
switch (rta->rta_type) {
case RTA_DST:
if (RTA_PAYLOAD(rta) >= sizeof(struct in6_addr)) {
FF_MAYBE_UNUSED char str[INET6_ADDRSTRLEN];
FF_DEBUG("Found destination: %s", inet_ntop(AF_INET6, RTA_DATA(rta), str, sizeof(str)));
struct in6_addr* dst = (struct in6_addr*) RTA_DATA(rta);
if (!IN6_IS_ADDR_UNSPECIFIED(dst)) goto next;
}
@@ -306,12 +359,15 @@ bool ffNetifGetDefaultRouteImplV6(FFNetifDefaultRouteResult* result)
case RTA_OIF:
if (RTA_PAYLOAD(rta) >= sizeof(uint32_t)) {
entry.ifindex = *(uint32_t*) RTA_DATA(rta);
FF_DEBUG("Found interface index: %u", entry.ifindex);
}
break;
case RTA_GATEWAY:
if (RTA_PAYLOAD(rta) >= sizeof(struct in6_addr)) {
struct in6_addr* gw = (struct in6_addr*) RTA_DATA(rta);
if (IN6_IS_ADDR_UNSPECIFIED(gw)) goto next;
FF_MAYBE_UNUSED char str[INET6_ADDRSTRLEN];
FF_DEBUG("Found gateway: %s", inet_ntop(AF_INET6, gw, str, sizeof(str)));
}
break;
case RTA_PRIORITY:
@@ -319,6 +375,7 @@ bool ffNetifGetDefaultRouteImplV6(FFNetifDefaultRouteResult* result)
uint32_t metric = *(uint32_t*) RTA_DATA(rta);
if (metric >= minMetric) goto next;
entry.metric = metric;
FF_DEBUG("Found metric: %u", entry.metric);
}
break;
}
@@ -331,12 +388,15 @@ bool ffNetifGetDefaultRouteImplV6(FFNetifDefaultRouteResult* result)
}
minMetric = entry.metric;
result->ifIndex = entry.ifindex;
FF_DEBUG("Updated best route: ifindex=%u, metric=%u", entry.ifindex, entry.metric);
}
if (minMetric < UINT32_MAX)
{
if_indextoname(result->ifIndex, result->ifName);
FF_DEBUG("Found default IPv6 route: interface=%s, index=%u, metric=%u", result->ifName, result->ifIndex, minMetric);
return true;
}
FF_DEBUG("No IPv6 default route found");
return false;
}