https://en.wikipedia.org/wiki/Short_Message_Peer-to-Peer
https://smpp.org/
Short Message Peer-to-Peer (SMPP) 是一种开放的短信协议。虽然名字中带有 P2P 的字样，但 SMPP 实际上是一种 C/S 协议。
移动 CMPP 协议，联通 SGIP 协议，电信 SMGP 协议，据说他们之间交换信息都是走 SMPP 协议。
常用版本：
- 3.3 https://smpp.org/SMPP_v3_3.pdf
仅支持 GSM 网络 - 3.4 https://smpp.org/SMPP_v3_4_Issue1_2.pdf
- https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=141
- 5.0 https://smpp.org/SMPP_v5.pdf
根据维基百科的资料，SMPP 之前由 SMS 论坛开发，但是 2007 年，SMS 论坛已经解散了。
数据格式
数据包（PDU (protocol data units, or packets)）格式：
header(必需)command_length4Bcommand_id4Bcommand_status4Bsequence_number4Bbody(可选)
'command_length', (60) ... 00 00 00 3C
'command_id', (4) ... 00 00 00 04
'command_status', (0) ... 00 00 00 00
'sequence_number', (5) ... 00 00 00 05
'service_type', () ... 00
'source_addr_ton', (2) ... 02
'source_addr_npi', (8) ... 08
'source_addr', (555) ... 35 35 35 00
'dest_addr_ton', (1) ... 01
'dest_addr_npi', (1) ... 01
'dest_addr', (555555555) ... 35 35 35 35 35 35 35 35 35 00
'esm_class', (0) ... 00
'protocol_id', (0) ... 00
'priority_flag', (0) ... 00
'schedule_delivery_time', (0) ... 00
'validity_period', (0) ... 00
'registered_delivery', (0) ... 00
'replace_if_present_flag', (0) ... 00
'data_coding', (3) ... 03
'sm_default_msg_id', (0) ... 00
'sm_length', (15) ... 0F
'short_message', (Hello Wikipedia) ... 48 65 6C 6C 6F 20 57 69 6B 69 70 65 64 69 61
名词
- SMSC：short message service center，服务器端
或者叫 Messaging Center，简写作 MC - ESME：extended short message entity，客户端
命令
| Command ID | Value |
|---|---|
| generic_nack | 0x80000000 |
| bind_receiver | 0x00000001 |
| bind_receiver_resp | 0x80000001 |
| bind_transmitter | 0x00000002 |
| bind_transmitter_resp | 0x80000002 |
| query_sm | 0x00000003 |
| query_sm_resp | 0x80000003 |
| submit_sm | 0x00000004 |
| submit_sm_resp | 0x80000004 |
| deliver_sm | 0x00000005 |
| deliver_sm_resp | 0x80000005 |
| unbind | 0x00000006 |
| unbind_resp | 0x80000006 |
| replace_sm | 0x00000007 |
| replace_sm_resp | 0x80000007 |
| cancel_sm | 0x00000008 |
| cancel_sm_resp | 0x80000008 |
| bind_transceiver | 0x00000009 |
| bind_transceiver_resp | 0x80000009 |
| Reserved | 0x0000000A / 0x8000000A |
| outbind | 0x0000000B |
| Reserved | 0x0000000C - 0x00000014 / 0x8000000B - 0x80000014 |
| enquire_link | 0x00000015 |
| enquire_link_resp | 0x80000015 |
| Reserved | 0x00000016 - 0x00000020 / 0x80000016 - 0x80000020 |
| submit_multi | 0x00000021 |
| submit_multi_resp | 0x80000021 |
| Reserved | 0x00000022 - 0x000000FF / 0x80000022 - 0x800000FF |
| Reserved | 0x00000100 |
| Reserved | 0x80000100 |
| Reserved | 0x00000101 / 0x80000101 |
| alert_notification | 0x00000102 |
| Reserved | 0x80000102 |
| data_sm | 0x00000103 |
| data_sm_resp | 0x80000103 |
| Reserved for SMPP extension | 0x00000104 - 0x0000FFFF / 0x80000104 - 0x8000FFFF |
| Reserved | 0x00010000 - 0x000101FF / 0x80010000 - 0x800101FF |
| Reserved for SMSC Vendor | 0x00010200 - 0x000102FF / 0x80010200 - 0x800102FF |
| Reserved | 0x00010300 - 0xFFFFFFFF |
总结：
| RequestCommandID | ComandValue | 十进制 | 说明 |
|---|---|---|---|
| bind_receiver | 0x00000001 | 1 | 建立接收会话（接收上行） |
| bind_transmitter | 0x00000002 | 2 | 建立发送会话（提交下行） |
| query_sm | 0x00000003 | 3 | 查询 |
| submit_sm | 0x00000004 | 4 | 提交 |
| deliver_sm | 0x00000005 | 5 | 下发（状态报告或上行） |
| unbind | 0x00000006 | 6 | 中断连接 |
| replace_sm | 0x00000007 | 7 | 替换已提交消息 |
| cancel_sm | 0x00000008 | 8 | 取消 |
| bind_transceiver | 0x00000009 | 9 | 建立会话（发送 + 接收） |
| outbind | 0x0000000B | 11 | 通知客户端建立连接（bind_receiver ） |
| enquire_link | 0x00000015 | 21 | 心跳 |
| submit_multi | 0x00000021 | 33 | 批量提交（多个收件人） |
| alert_notification | 0x00000102 | 258 | - |
| data_sm | 0x00000103 | 259 | submit/deliver 的替代方案 |
- 响应：对应请求 +
0x80000000 outbind，alert_notification没有对应响应- 此外，还有
generic_nack是通用拒绝响应（0x80000000） - outbind 的场景是服务器端需要推送信息或状态给客户端
