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Merged feature_wlan_bridge

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This commit is contained in:
Uwe Seimet 2021-08-23 17:22:08 +02:00
parent ab4966e72e
commit da127f2742
1 changed files with 67 additions and 10 deletions
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77
src/raspberrypi/devices/ctapdriver.cpp
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@ -14,6 +14,7 @@
//---------------------------------------------------------------------------
#include <unistd.h>
#include <arpa/inet.h>
#ifdef __linux__
#include <net/if.h>
#include <sys/ioctl.h>
@ -25,6 +26,9 @@
#include "ctapdriver.h"
#include "log.h"
#include "exceptions.h"
#include <string>
using namespace std;
//---------------------------------------------------------------------------
//
@ -84,6 +88,24 @@ static BOOL ip_link(int fd, const char* ifname, BOOL up) {
return TRUE;
}
static bool is_interface_up(const char *interface) {
string file = "/sys/class/net/";
file += interface;
file += "/carrier";
bool status = true;
FILE *fp = fopen(file.c_str(), "r");
if (!fp || fgetc(fp) != '1') {
status = false;
}
if (fp) {
fclose(fp);
}
return status;
}
BOOL CTapDriver::Init()
{
LOGTRACE("%s",__PRETTY_FUNCTION__);
@ -128,11 +150,24 @@ BOOL CTapDriver::Init()
return FALSE;
}
LOGTRACE("Going to see if the bridge is created");
// Check if the bridge is already created
if (access("/sys/class/net/rascsi_bridge", F_OK) != 0) {
LOGINFO("Creating the rascsi_bridge...");
LOGINFO("rascsi_bridge is not yet available");
LOGINFO("Checking whether to create bridge for interface eth0 or wlan0");
const char *interface = NULL;
if (is_interface_up("eth0")) {
interface = "eth0";
}
else if (is_interface_up("wlan0")) {
interface = "wlan0";
}
if (!interface) {
LOGERROR("Neither interface eth0 nor wlan0 is up, not creating bridge");
return FALSE;
}
LOGINFO("Creating rascsi_bridge for interface %s...", interface);
LOGDEBUG("brctl addbr rascsi_bridge");
if ((ret = ioctl(br_socket_fd, SIOCBRADDBR, "rascsi_bridge")) < 0) {
LOGERROR("Error: can't ioctl SIOCBRADDBR. Errno: %d %s", errno, strerror(errno));
@ -141,12 +176,34 @@ BOOL CTapDriver::Init()
close(br_socket_fd);
return FALSE;
}
LOGDEBUG("brctl addif rascsi_bridge eth0");
if (!br_setif(br_socket_fd, "rascsi_bridge", "eth0", TRUE)) {
close(m_hTAP);
close(ip_fd);
close(br_socket_fd);
return FALSE;
if (strcmp(interface, "wlan0")) {
LOGDEBUG("brctl addif rascsi_bridge %s", interface);
if (!br_setif(br_socket_fd, "rascsi_bridge", interface, TRUE)) {
close(m_hTAP);
close(ip_fd);
close(br_socket_fd);
return FALSE;
}
}
if (!strcmp(interface, "wlan0")) {
LOGDEBUG("ip address add 10.10.20.1/24 dev rascsi_bridge");
struct ifreq ifr_a;
ifr_a.ifr_addr.sa_family = AF_INET;
strncpy(ifr_a.ifr_name, "rascsi_bridge", IFNAMSIZ);
struct sockaddr_in* addr = (struct sockaddr_in*)&ifr_a.ifr_addr;
inet_pton(AF_INET, "10.10.20.1", &addr->sin_addr);
struct ifreq ifr_n;
ifr_n.ifr_addr.sa_family = AF_INET;
strncpy(ifr_n.ifr_name, "rascsi_bridge", IFNAMSIZ);
struct sockaddr_in* netmask = (struct sockaddr_in*)&ifr_n.ifr_addr;
inet_pton(AF_INET, "255.255.255.0", &netmask->sin_addr);
if (ioctl(ip_fd, SIOCSIFADDR, &ifr_a) < 0 || ioctl(ip_fd, SIOCSIFNETMASK, &ifr_n) < 0) {
LOGERROR("Error: can't ioctl SIOCSIFADDR or SIOCSIFNETMASK. Errno: %d %s", errno, strerror(errno));
close(m_hTAP);
close(ip_fd);
close(br_socket_fd);
return FALSE;
}
}
LOGDEBUG("ip link set dev rascsi_bridge up");
if (!ip_link(ip_fd, "rascsi_bridge", TRUE)) {
@ -158,7 +215,7 @@ BOOL CTapDriver::Init()
}
else
{
LOGINFO("Note: rascsi_bridge already created");
LOGINFO("rascsi_bridge is already available");
}
LOGDEBUG("ip link set ras0 up");