SMPP Examples(3.1)

Owned by Jenni Wallin
May 10, 2023
3 min read

This section contains SMPP Receiver and Transmitter agent examples.
 

Receiver Agent

Workflow example for the SMPP Receiver agent:


Receiver workflow example

The SMPP Receiver agent sends DELIVER_SM UDRs to the Analysis agent, which contains the following code:

consume {
    DELIVER_SM_RESP deliver_sm_resp = udrCreate(DELIVER_SM_RESP);
    if ((input.sequence_number % 2) == 0) {
        deliver_sm_resp.command_status = 2;
    } else {
        deliver_sm_resp.command_status = 0;
    }
    udrRoute(deliver_sm_resp);
}

With this code, the Analysis agent will:

  • Create a UDR of DELIVER_SM_RESP type called deliver_sm_resp.

  • Check whether the sequence number in the incoming DELIVER_SM UDR is even or odd.

  • If the sequence number is even, the command_status field in the deliver_sm_resp UDR is set to two (2), and if it is odd, the field is set to zero (0).

  • The deliver_sm_resp UDR is then routed back to the SMPP Receiver agent.

Transmitter Agent

Workflow example for the SMPP Transmitter agent:

Transmitter workflow example

The TCP/IP agent sends TCP_TI UDRs into the workflow using a decoder that defines this UDR type.

The Analysis agent contains the following code:

import ultra.SMPP;

consume {
 
    if (instanceOf(input, TCP_TI)) {
        TCP_TI tcp_udr = udrCreate(TCP_TI);
        tcp_udr = (TCP_TI) input;
        strToBA(tcp_udr.response, "message=" + tcp_udr.message + "\r\n");
        SUBMIT_SM submit_sm = udrCreate(SUBMIT_SM);
        bytearray sm;
        strToBA(sm, "MESSAGE", "UTF-16BE");
        submit_sm.short_message = sm;
        submit_sm.data_coding = 8;
        submit_sm.source_addr = "555123456";
        submit_sm.destination_addr = "555987654";
        udrRoute(tcp_udr, "OUT_TCP");
        udrRoute(submit_sm, "OUT_SMPP");
    }
}
} 

This code will:

  • Import the SMPP Ultra formats.

  • If the received UDR is of the TCP_TI type, the UDR is named tcp_udr, and the response field in the UDR is populated with the text "message=<contents of the message field>" in bytearray format.

  • Create a UDR of type SUBMIT_SM called submit_sm.

  • Create a bytearray object called sm, and populate this bytearray with the text "MESSAGE" in bytearray format with UTF-16BE encoding.

  • Populate the short_message field in the submit_sm UDR with the new bytearray.

  • Set the data coding to eight (8), which equals the UTF-16BE encoding according to the specification.

  • Set the source address to 555123456 and the destination address to 555987654.

  • Route the submit_sm UDR to the SMPP transmitter agent, and the tcp_udr UDR to the TCP/IP agent.

The SMPP Transmitter agent then sends SUBMT_SM_RESP UDRs back to the Analysis agent when receiving the corresponding SUBMIT_SM_RESP UDRs from the SMSC. The SUBMIT_SM_RESP UDRs contain the original SUBMIT_SM for which the SMSC has responded.