/* 打印以太网帧的包头信息 */
void print_frame( struct ether_header * peth )
{
/* 定义一个数组，用于存储把mac地址转换成字符串后的字符串 */
char buf[ 18 ];
printf("\n================================== 第 %d 个包 =======================================\n\n", global.packet_num );
printf("==== 以太网帧信息 =====\n");
char * shost = peth->ether_shost;
mac_to_str( shost, buf );
printf("源以太网地址: %s\n", buf );
char * dhost = peth->ether_dhost;
mac_to_str( dhost, buf );
printf("目的以太网地址:%s\n", buf );
}
static str_t httpapp_user_binding( user_t * u, u08 comma )
{
str_t macs = { 0, 0 };
mac_mapping_t * m = 0;
if (!u)
return MAKE_STRING("{}");
while (0 != (m = get_next_mac(m)))
{
if (m->user == u)
{
char mac[18];
str_t mac_str = __make_string( mac, 18 );
mac_to_str( mac, &m->eth_addr );
mac[17] = ',';
append_string( &macs, &mac_str );
}
}
macs.str[macs.len - 1] = 0;
return fmt( 256, "{uname: \"%s\",macs: \"%s\"}%c",
u->name, macs.str, comma ? ',' : ' ');
}
void arptab_insert( u08 iface, u32 net_addr, mac_addr phys_addr )
{
arptab_entry * e = arptab_findslot( net_addr );
if (e->net_addr != net_addr)
{
char phys[32];
log_printf( "arp: new mapping %u.%u.%u.%u -> %s iface=%d\n",
net_addr & 0xff,
net_addr >> 8 & 0xff,
net_addr >> 16 & 0xff,
net_addr >> 24 & 0xff,
mac_to_str( phys, &phys_addr ), iface );
}
void print_arp( struct arphdr * parp )
{
printf("硬件类型: %d ", ntohs(parp->ar_hrd) );
switch( ntohs( parp->ar_hrd ) ){
case ARPHRD_ETHER:
printf("Ethernet 10/100Mbps.\n");
break;
case ARPHRD_EETHER:
printf("Experimental Ethernet.\n");
break;
case ARPHRD_AX25:
printf("AX.25 Level 2.\n");
break;
case ARPHRD_PRONET:
printf("PROnet token ring.\n");
break;
case ARPHRD_IEEE802:
printf("IEEE 802.2 Ethernet/TR/TB.\n");
break;
case ARPHRD_APPLETLK:
printf("APPLEtalk.\n");
break;
case ARPHRD_ATM:
printf("ATM.\n");
break;
case ARPHRD_IEEE1394:
printf("IEEE 1394 IPv4 .\n");
break;
default:
printf("Unknow.\n");
break;
}
printf("映射的协议地址类型: %d ", ntohs(parp->ar_pro) );
switch( ntohs(parp->ar_pro) ){
case ETHERTYPE_IP:
printf("IP.\n");
break;
default:
printf("error.\n");
break;
}
printf("硬件地址长度: %d\n", parp->ar_hln );
printf("协议地址长度: %d\n", parp->ar_pln );
printf("操作码: %d ", ntohs(parp->ar_op) );
switch( ntohs(parp->ar_op) ){
case ARPOP_REQUEST:
printf("ARP 请求.\n");
break;
case ARPOP_REPLY:
printf("ARP 应答.\n");
break;
case ARPOP_RREQUEST:
printf("RARP 请求.\n");
break;
case ARPOP_RREPLY:
printf("RARP 应答.\n");
break;
case ARPOP_InREQUEST:
printf("InARP 请求.\n");
break;
case ARPOP_InREPLY:
printf("InARP 应答.\n");
break;
case ARPOP_NAK:
printf("(ATM)ARP NAK.\n");
break;
default:
printf("arp 操作码错误.\n");
break;
}
char * addr = (char*)(parp + 1);
char buf[18];
mac_to_str( addr, buf );
printf("发送端以太网地址: %s\n", buf );
printf("发送端IP地址: %s\n", inet_ntoa( *(struct in_addr *)(addr+6) ));
mac_to_str( addr+10, buf );
printf("目的以太网地址: %s\n", buf );
printf("目的IP地址: %s\n", inet_ntoa( *(struct in_addr *)(addr+16) ));
}
int nmrp_do(struct nmrpd_args *args)
{
struct nmrp_pkt tx, rx;
uint8_t *src, dest[6];
uint16_t len, region;
char *filename;
time_t beg;
int i, status, ulreqs, expect, upload_ok, autoip;
struct ethsock *sock;
uint32_t intf_addr;
void (*sigh_orig)(int);
struct {
struct in_addr addr;
struct in_addr mask;
} PACKED ipconf;
if (args->op != NMRP_UPLOAD_FW) {
fprintf(stderr, "Operation not implemented.\n");
return 1;
}
if (!mac_parse(args->mac, dest)) {
fprintf(stderr, "Invalid MAC address '%s'.\n", args->mac);
return 1;
}
if ((ipconf.mask.s_addr = inet_addr(args->ipmask)) == INADDR_NONE) {
fprintf(stderr, "Invalid subnet mask '%s'.\n", args->ipmask);
return 1;
}
if (!args->ipaddr) {
autoip = true;
/* The MAC of the device that was used to test this utility starts
* with a4:2b:8c, hence 164 (0xa4) and 183 (0x2b + 0x8c)
*/
args->ipaddr = "10.164.183.252";
if (!args->ipaddr_intf) {
args->ipaddr_intf = "10.164.183.253";
}
} else if (args->ipaddr_intf) {
autoip = true;
} else {
autoip = false;
}
if ((ipconf.addr.s_addr = inet_addr(args->ipaddr)) == INADDR_NONE) {
fprintf(stderr, "Invalid IP address '%s'.\n", args->ipaddr);
return 1;
}
if (args->ipaddr_intf && (intf_addr = inet_addr(args->ipaddr_intf)) == INADDR_NONE) {
fprintf(stderr, "Invalid IP address '%s'.\n", args->ipaddr_intf);
return 1;
}
if (args->file_local && strcmp(args->file_local, "-") && access(args->file_local, R_OK) == -1) {
fprintf(stderr, "Error accessing file '%s'.\n", args->file_local);
return 1;
}
if (args->file_remote) {
if (!tftp_is_valid_filename(args->file_remote)) {
fprintf(stderr, "Invalid remote filename '%s'.\n",
args->file_remote);
return 1;
}
}
if (args->region) {
region = htons(to_region_code(args->region));
if (!region) {
fprintf(stderr, "Invalid region code '%s'.\n", args->region);
return 1;
}
} else {
region = 0;
}
status = 1;
sock = ethsock_create(args->intf, ETH_P_NMRP);
if (!sock) {
return 1;
}
gsock = sock;
garp = 0;
sigh_orig = signal(SIGINT, sigh);
if (!autoip) {
status = is_valid_ip(sock, &ipconf.addr, &ipconf.mask);
if (status <= 0) {
if (!status) {
fprintf(stderr, "Address %s/%s cannot be used on interface %s.\n",
args->ipaddr, args->ipmask, args->intf);
}
goto out;
}
} else {
if (verbosity) {
printf("Adding %s to interface %s.\n", args->ipaddr_intf, args->intf);
}
if (ethsock_ip_add(sock, intf_addr, ipconf.mask.s_addr, &gundo) != 0) {
goto out;
}
}
if (ethsock_set_timeout(sock, args->rx_timeout)) {
goto out;
}
src = ethsock_get_hwaddr(sock);
if (!src) {
goto out;
}
memcpy(tx.eh.ether_shost, src, 6);
memcpy(tx.eh.ether_dhost, dest, 6);
tx.eh.ether_type = htons(ETH_P_NMRP);
msg_init(&tx.msg, NMRP_C_ADVERTISE);
msg_opt_add(&tx.msg, NMRP_O_MAGIC_NO, "NTGR", 4);
msg_hton(&tx.msg);
i = 0;
upload_ok = 0;
beg = time(NULL);
while (1) {
printf("\rAdvertising NMRP server on %s ... %c",
args->intf, spinner[i]);
fflush(stdout);
i = (i + 1) & 3;
if (pkt_send(sock, &tx) < 0) {
perror("sendto");
goto out;
}
status = pkt_recv(sock, &rx);
if (status == 0 && memcmp(rx.eh.ether_dhost, src, 6) == 0) {
break;
} else if (status == 1) {
goto out;
} else {
if ((time(NULL) - beg) >= 60) {
printf("\nNo response after 60 seconds. Bailing out.\n");
goto out;
}
}
}
printf("\n");
expect = NMRP_C_CONF_REQ;
ulreqs = 0;
do {
if (expect != NMRP_C_NONE && rx.msg.code != expect) {
fprintf(stderr, "Received %s while waiting for %s!\n",
msg_code_str(rx.msg.code), msg_code_str(expect));
}
msg_init(&tx.msg, NMRP_C_NONE);
status = 1;
switch (rx.msg.code) {
case NMRP_C_ADVERTISE:
printf("Received NMRP advertisement from %s.\n",
mac_to_str(rx.eh.ether_shost));
status = 1;
goto out;
case NMRP_C_CONF_REQ:
tx.msg.code = NMRP_C_CONF_ACK;
msg_opt_add(&tx.msg, NMRP_O_DEV_IP, &ipconf, 8);
msg_opt_add(&tx.msg, NMRP_O_FW_UP, NULL, 0);
#ifdef NMRPFLASH_SET_REGION
if (region) {
msg_opt_add(&tx.msg, NMRP_O_DEV_REGION, ®ion, 2);
}
#endif
expect = NMRP_C_TFTP_UL_REQ;
printf("Received configuration request from %s.\n",
mac_to_str(rx.eh.ether_shost));
memcpy(tx.eh.ether_dhost, rx.eh.ether_shost, 6);
printf("Sending configuration: ip %s, mask %s.\n",
args->ipaddr, args->ipmask);
memcpy(arpmac, rx.eh.ether_shost, 6);
memcpy(&arpip, &ipconf.addr, sizeof(ipconf.addr));
if (ethsock_arp_add(sock, arpmac, &arpip) != 0) {
goto out;
}
garp = 1;
break;
case NMRP_C_TFTP_UL_REQ:
if (!upload_ok) {
if (++ulreqs > 5) {
printf("Bailing out after %d upload requests.\n",
ulreqs);
tx.msg.code = NMRP_C_CLOSE_REQ;
break;
}
} else {
if (verbosity) {
printf("Ignoring extra upload request.\n");
}
ethsock_set_timeout(sock, args->ul_timeout);
tx.msg.code = NMRP_C_KEEP_ALIVE_REQ;
break;
}
len = 0;
filename = msg_opt_data(&rx.msg, NMRP_O_FILE_NAME, &len);
if (filename) {
if (!args->file_remote) {
args->file_remote = filename;
}
printf("Received upload request: filename '%.*s'.\n",
len, filename);
} else if (!args->file_remote) {
args->file_remote = args->file_local;
printf("Received upload request with empty filename.\n");
}
status = 0;
if (args->tftpcmd) {
printf("Executing '%s' ... \n", args->tftpcmd);
setenv("IP", inet_ntoa(ipconf.addr), 1);
setenv("MAC", mac_to_str(rx.eh.ether_shost), 1);
setenv("NETMASK", inet_ntoa(ipconf.mask), 1);
status = system(args->tftpcmd);
}
if (!status && args->file_local) {
if (!autoip) {
status = is_valid_ip(sock, &ipconf.addr, &ipconf.mask);
if (status < 0) {
goto out;
} else if (!status) {
printf("IP address of %s has changed. Please assign a "
"static ip to the interface.\n", args->intf);
tx.msg.code = NMRP_C_CLOSE_REQ;
break;
}
}
if (verbosity) {
printf("Using remote filename '%s'.\n",
args->file_remote);
}
if (!strcmp(args->file_local, "-")) {
printf("Uploading from stdin ... ");
} else {
printf("Uploading %s ... ", leafname(args->file_local));
}
fflush(stdout);
status = tftp_put(args);
}
if (!status) {
printf("OK\nWaiting for remote to respond.\n");
upload_ok = 1;
ethsock_set_timeout(sock, args->ul_timeout);
tx.msg.code = NMRP_C_KEEP_ALIVE_REQ;
expect = NMRP_C_NONE;
} else if (status == -2) {
expect = NMRP_C_TFTP_UL_REQ;
} else {
goto out;
}
break;
case NMRP_C_KEEP_ALIVE_REQ:
tx.msg.code = NMRP_C_KEEP_ALIVE_ACK;
ethsock_set_timeout(sock, args->ul_timeout);
printf("Received keep-alive request.\n");
break;
case NMRP_C_CLOSE_REQ:
tx.msg.code = NMRP_C_CLOSE_ACK;
break;
case NMRP_C_CLOSE_ACK:
status = 0;
goto out;
default:
fprintf(stderr, "Unknown message code 0x%02x!\n",
rx.msg.code);
msg_dump(&rx.msg, 0);
}
if (tx.msg.code != NMRP_C_NONE) {
msg_hton(&tx.msg);
if (pkt_send(sock, &tx) < 0) {
perror("sendto");
goto out;
}
if (tx.msg.code == NMRP_C_CLOSE_REQ) {
goto out;
}
}
if (rx.msg.code == NMRP_C_CLOSE_REQ) {
printf("Remote finished. Closing connection.\n");
break;
}
status = pkt_recv(sock, &rx);
if (status) {
if (status == 2) {
fprintf(stderr, "Timeout while waiting for %s.\n",
msg_code_str(expect));
}
goto out;
}
ethsock_set_timeout(sock, args->rx_timeout);
} while (1);
status = 0;
if (ulreqs) {
printf("Reboot your device now.\n");
} else {
printf("No upload request received.\n");
}
out:
signal(SIGINT, sigh_orig);
gsock = NULL;
ethsock_arp_del(sock, arpmac, &arpip);
ethsock_ip_del(sock, &gundo);
ethsock_close(sock);
return status;
}
