// return -1 if the interface was not found; if the interface was found retrn 0 and fill in IP address and mask
int net_get_if_addr(const char *bridge, uint32_t *ip, uint32_t *mask, uint8_t mac[6], int *mtu) {
assert(bridge);
assert(ip);
assert(mask);
if (arg_debug)
printf("get interface %s configuration\n", bridge);
int rv = -1;
struct ifaddrs *ifaddr, *ifa;
if (getifaddrs(&ifaddr) == -1)
errExit("getifaddrs");
// walk through the linked list; if the interface is found, extract IP address and mask
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa->ifa_addr == NULL)
continue;
if (strcmp(ifa->ifa_name, bridge) != 0)
continue;
if (ifa->ifa_addr->sa_family == AF_INET) {
struct sockaddr_in *si = (struct sockaddr_in *) ifa->ifa_netmask;
*mask = ntohl(si->sin_addr.s_addr);
si = (struct sockaddr_in *) ifa->ifa_addr;
*ip = ntohl(si->sin_addr.s_addr);
if (strcmp(ifa->ifa_name, "lo") != 0) {
net_get_mac(ifa->ifa_name, mac);
*mtu = net_get_mtu(bridge);
}
rv = 0;
break;
}
}
freeifaddrs(ifaddr);
return rv;
}
// scan interfaces in current namespace and print IP address/mask for each interface
void net_ifprint(void) {
uint32_t ip;
uint32_t mask;
struct ifaddrs *ifaddr, *ifa;
if (getifaddrs(&ifaddr) == -1)
errExit("getifaddrs");
printf("%-17.17s%-19.19s%-17.17s%-17.17s%-6.6s\n",
"Interface", "MAC", "IP", "Mask", "Status");
// walk through the linked list
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
if (ifa->ifa_addr == NULL)
continue;
if (ifa->ifa_addr->sa_family == AF_INET) {
struct sockaddr_in *si = (struct sockaddr_in *) ifa->ifa_netmask;
mask = ntohl(si->sin_addr.s_addr);
si = (struct sockaddr_in *) ifa->ifa_addr;
ip = ntohl(si->sin_addr.s_addr);
// interface status
char *status;
if (ifa->ifa_flags & IFF_RUNNING && ifa->ifa_flags & IFF_UP)
status = "UP";
else
status = "DOWN";
// ip address and mask
char ipstr[30];
sprintf(ipstr, "%d.%d.%d.%d", PRINT_IP(ip));
char maskstr[30];
sprintf(maskstr, "%d.%d.%d.%d", PRINT_IP(mask));
// mac address
unsigned char mac[6];
net_get_mac(ifa->ifa_name, mac);
char macstr[30];
if (strcmp(ifa->ifa_name, "lo") == 0)
macstr[0] = '\0';
else
sprintf(macstr, "%02x:%02x:%02x:%02x:%02x:%02x", PRINT_MAC(mac));
// print
printf("%-17.17s%-19.19s%-17.17s%-17.17s%-6.6s\n",
ifa->ifa_name, macstr, ipstr, maskstr, status);
// network scanning
if (!arg_scan) // scanning disabled
continue;
if (strcmp(ifa->ifa_name, "lo") == 0) // no loopbabck scanning
continue;
if (mask2bits(mask) < 16) // not scanning large networks
continue;
if (!ip) // if not configured
continue;
// only if the interface is up and running
if (ifa->ifa_flags & IFF_RUNNING && ifa->ifa_flags & IFF_UP)
arp_scan(ifa->ifa_name, ip, mask);
}
}
freeifaddrs(ifaddr);
}
int main(void)
{
NetbootParam *param;
// Initialize some consoles.
serial_console_init();
cbmem_console_init();
video_console_init();
input_init();
printf("\n\nStarting netboot on " CONFIG_BOARD "...\n");
timestamp_init();
if (run_init_funcs())
halt();
// Make sure graphics are available if they aren't already.
enable_graphics();
dc_usb_initialize();
srand(timer_raw_value());
printf("Looking for network device... ");
while (!net_get_device())
usb_poll();
printf("done.\n");
printf("Waiting for link... ");
int ready = 0;
while (!ready) {
if (net_ready(&ready))
halt();
}
mdelay(200); // some dongles need more time than they think
printf("done.\n");
// Start up the network stack.
uip_init();
// Plug in the MAC address.
const uip_eth_addr *mac_addr = net_get_mac();
if (!mac_addr)
halt();
printf("MAC: ");
print_mac_addr(mac_addr);
printf("\n");
uip_setethaddr(*mac_addr);
// Find out who we are.
uip_ipaddr_t my_ip, next_ip, server_ip;
const char *dhcp_bootfile;
while (dhcp_request(&next_ip, &server_ip, &dhcp_bootfile))
printf("Dhcp failed, retrying.\n");
printf("My ip is ");
uip_gethostaddr(&my_ip);
print_ip_addr(&my_ip);
printf("\nThe DHCP server ip is ");
print_ip_addr(&server_ip);
printf("\n");
// Retrieve settings from the shared data area.
FmapArea shared_data;
if (fmap_find_area("SHARED_DATA", &shared_data)) {
printf("Couldn't find the shared data area.\n");
halt();
}
void *data = flash_read(shared_data.offset, shared_data.size);
netboot_params_init(data, shared_data.size);
// Get TFTP server IP and file name from params with DHCP as fallback
uip_ipaddr_t *tftp_ip = NULL;
param = netboot_params_val(NetbootParamIdTftpServerIp);
if (param->data && param->size >= sizeof(uip_ipaddr_t)) {
tftp_ip = (uip_ipaddr_t *)param->data;
printf("TFTP server IP set from firmware parameters: ");
} else {
tftp_ip = &next_ip;
printf("TFTP server IP supplied by DHCP server: ");
}
print_ip_addr(tftp_ip);
printf("\n");
const char *bootfile = NULL;
param = netboot_params_val(NetbootParamIdBootfile);
if (param->data && param->size > 0 && strnlen((const char *)param->data,
param->size) < param->size) {
bootfile = (const char *)param->data;
printf("Bootfile set from firmware parameters: %s\n", bootfile);
} else {
bootfile = dhcp_bootfile;
printf("Bootfile supplied by DHCP server: %s\n", bootfile);
}
// Download the bootfile.
uint32_t size;
if (tftp_read(payload, tftp_ip, bootfile, &size, MaxPayloadSize)) {
printf("Tftp failed.\n");
if (dhcp_release(server_ip))
printf("Dhcp release failed.\n");
halt();
}
printf("The bootfile was %d bytes long.\n", size);
// Use command line from params when present (added to the default).
param = netboot_params_val(NetbootParamIdKernelArgs);
if (param->data && param->size > 0 && *(char *)param->data != '\0') {
cmd_line[sizeof(def_cmd_line) - 1] = ' ';
strncpy(&cmd_line[sizeof(def_cmd_line)], param->data,
sizeof(cmd_line) - sizeof(def_cmd_line));
printf("Command line set from firmware parameters.\n");
// Otherwise, try to fetch it dynamically as a TFTP file.
} else if (!(tftp_read(cmd_line, tftp_ip, "cmdline." CONFIG_BOARD,
&size, sizeof(cmd_line) - 1))) {
while (cmd_line[size - 1] <= ' ') // strip trailing whitespace
if (!--size) break; // and control chars (\n, \r)
cmd_line[size] = '\0';
while (size--) // replace inline control
if (cmd_line[size] < ' ') // chars with spaces
cmd_line[size] = ' ';
printf("Command line loaded dynamically from TFTP server.\n");
// If the file doesn't exist, finally fall back to built-in default.
} else {
printf("No command line from TFTP, falling back to default.\n");
}
cmd_line[sizeof(cmd_line) - 1] = '\0';
// We're done on the network, so release our IP.
if (dhcp_release(server_ip)) {
printf("Dhcp release failed.\n");
halt();
}
// Add tftp server IP into command line.
static const char def_tftp_cmdline[] = " tftpserverip=xxx.xxx.xxx.xxx";
const int tftp_cmdline_def_size = sizeof(def_tftp_cmdline) - 1;
int cmd_line_size = strlen(cmd_line);
if (cmd_line_size + tftp_cmdline_def_size >= sizeof(cmd_line)) {
printf("Out of space adding TFTP server IP to the command line.\n");
return 1;
}
sprintf(&cmd_line[cmd_line_size], " tftpserverip=%d.%d.%d.%d",
uip_ipaddr1(tftp_ip), uip_ipaddr2(tftp_ip),
uip_ipaddr3(tftp_ip), uip_ipaddr4(tftp_ip));
printf("The command line is: %s\n", cmd_line);
// Boot.
boot(payload, cmd_line, NULL, NULL);
// We should never get here.
printf("Got to the end!\n");
halt();
return 0;
}
