int main(){
time(&startup_time);
int sock;
int addr_len, bytes_read;
char recv_data[1024];
struct sockaddr_in server_addr , client_addr;
if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1){
perror("Socket");
exit(1);
}
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(161);
server_addr.sin_addr.s_addr = INADDR_ANY;
bzero(&(server_addr.sin_zero),8);
if (bind(sock,(struct sockaddr *)&server_addr,sizeof(struct sockaddr)) == -1){
perror("Bind");
exit(1);
}
addr_len = sizeof(struct sockaddr);
printf("\nWaiting for SNMP-clients on port 161");
fflush(stdout);
while (1){
bytes_read = recvfrom(sock,recv_data,1024,0,(struct sockaddr *)&client_addr, &addr_len);
recv_data[bytes_read] = '\0';
printf("\n(%s , %d)\n",inet_ntoa(client_addr.sin_addr),ntohs(client_addr.sin_port));
printf("\n");
struct snmp_message_rx* snmp_msg=create_snmp_message_rx(& recv_data[0]);
if(snmp_msg!=NULL){
disp_snmp_message_rx(snmp_msg);
struct snmp_pdu_rx* snmp_pdu=create_snmp_pdu_rx(snmp_msg->snmp_pdu);
if(snmp_pdu!=NULL){
printf("\n");
disp_snmp_pdu_rx(snmp_pdu);
struct varbind_list_rx* varbind_list=create_varbind_list_rx(snmp_pdu->varbindings);
printf("\n");
disp_varbind_list_rx(varbind_list);
unsigned int a=5; //testing
struct varbind* varbind=create_varbind(varbind_list->varbind_list[0]->oid,0x02, &a);
printf("\n");
disp_varbind(varbind);
process_varbind_list(varbind_list);
printf("\n");
disp_varbind_list_rx(varbind_list);
struct varbind_list_tx* varbind_list_to_send=create_varbind_list_tx(varbind_list);
struct snmp_pdu_tx* snmp_pdu_tx=create_snmp_pdu_tx(0xa2,snmp_pdu->request_id,0x00,0x00, varbind_list_to_send);
printf("\n");
struct snmp_message_tx* snmp_msg_tx= create_snmp_message_tx(snmp_msg->community, snmp_pdu_tx);
sendPacket(client_addr.sin_addr,ntohs(client_addr.sin_port),sock, snmp_msg_tx);
clr_snmp_message_tx(snmp_msg_tx);
clr_snmp_pdu_tx(snmp_pdu_tx);
clr_varbind_list_tx(varbind_list_to_send);
clr_varbind(varbind);
clr_varbind_list_rx(varbind_list);
clr_snmp_pdu_rx(snmp_pdu);
}
clr_snmp_message_rx(snmp_msg);
}
fflush(stdout);
}
return 0;
}
int main()
{
time(&startup_time);
int sock;
socklen_t addr_len;
int bytes_read;
char recv_data[1024];
struct sockaddr_in server_addr , client_addr;
oid_db = create_oid_db();
add_oid(oid_db, (unsigned char *) "1.3.6.1.2.1.1.1.0", PRIMV_OCTSTR, description);
add_oid(oid_db, (unsigned char *) "1.3.6.1.2.1.1.3.0", PRIMV_TIMTICK, &timeticks);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.1.1.0", PRIMV_OCTSTR, MasterName);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.1.2.0", PRIMV_OCTSTR, MasterLocation);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.1.3.0", PRIMV_INT, &NumberOfAgents);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.2.1.1.1.0", PRIMV_OCTSTR, PID);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.2.1.1.2.0", PRIMV_OCTSTR, HW);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.2.1.1.3.0", PRIMV_OCTSTR, SW);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.2.1.1.4.0", PRIMV_OCTSTR, SN);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.2.1.1.5.0", PRIMV_OCTSTR, ID);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.2.1.1.6.0", PRIMV_INT, &UB);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.2.1.2.1.0", PRIMV_INT, &POW);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.2.1.2.2.0", PRIMV_INT, &WORK);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.2.1.2.3.0", PRIMV_INT, &FREQ);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.2.1.2.4.0", PRIMV_INT, &VRMS);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.2.1.2.5.0", PRIMV_INT, &IRMS);
add_oid(oid_db, (unsigned char *) "1.3.6.1.4.1.99.2.1.2.6.0", PRIMV_INT, &LOAD);
print_oid_db(oid_db);
if ((sock = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
{
perror("Socket");
exit(1);
}
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(161);
server_addr.sin_addr.s_addr = INADDR_ANY;
bzero(&(server_addr.sin_zero),8);
if (bind(sock,(struct sockaddr *)&server_addr,sizeof(struct sockaddr)) == -1)
{
perror("Bind");
exit(1);
}
addr_len = sizeof(struct sockaddr);
printf("\nWaiting for SNMP-clients on port 161");
fflush(stdout);
while (1)
{
bytes_read = recvfrom(sock, recv_data, 1024, 0, (struct sockaddr *) &client_addr, &addr_len);
recv_data[bytes_read] = '\0';
printf("\n(%s , %d)\n", inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));
printf("\n");
struct snmp_message_rx *snmp_msg = create_snmp_message_rx((unsigned char *) &recv_data[0]);
if(snmp_msg!=NULL)
{
disp_snmp_message_rx(snmp_msg);
struct snmp_pdu_rx* snmp_pdu=create_snmp_pdu_rx(snmp_msg->snmp_pdu);
if(snmp_pdu!=NULL)
{
printf("\n");
disp_snmp_pdu_rx(snmp_pdu);
struct varbind_list_rx *varbind_list = create_varbind_list_rx(snmp_pdu->varbindings);
printf("\n");
disp_varbind_list_rx(varbind_list);
unsigned int a=5; //testing
struct varbind *varbind = create_varbind(varbind_list->varbind_list[0]->oid, PRIMV_INT, &a);
printf("\n");
disp_varbind(varbind);
process_varbind_list(varbind_list, snmp_pdu->snmp_pdu_type);
printf("\n");
disp_varbind_list_rx(varbind_list);
/* Response */
struct varbind_list_tx *varbind_list_to_send = create_varbind_list_tx(varbind_list);
struct snmp_pdu_tx *snmp_pdu_tx = create_snmp_pdu_tx(PDU_GET_RESP, snmp_pdu->request_id, 0x00,0x00, varbind_list_to_send);
printf("\n");
struct snmp_message_tx *snmp_msg_tx = create_snmp_message_tx(snmp_msg->community,snmp_pdu_tx);
sendPacket(client_addr.sin_addr, ntohs(client_addr.sin_port), sock,snmp_msg_tx);
clr_snmp_message_tx(snmp_msg_tx);
clr_snmp_pdu_tx(snmp_pdu_tx);
clr_varbind_list_tx(varbind_list_to_send);
clr_varbind(varbind);
clr_varbind_list_rx(varbind_list);
clr_snmp_pdu_rx(snmp_pdu);
} // if snmp_pdu!=NULL
clr_snmp_message_rx(snmp_msg);
} // if snmp_msg!=NULL
fflush(stdout);
} // While
return 0;
}