AT+i Programmer's Manual - SE Spezial-Electronic AG

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19.2.3 Joining an Existing Ad-Hoc Network iRouter Mode If iChip detects ad-hoc networks in its vicinity and the WLSI parameter is set to (!), iChip joins the network having the strongest signal. Otherwise, iChip joins the network whose SSID is set by the WLSI parameter. 19.2.4 Merging Ad-Hoc Networks When iChip is configured to operate in ad-hoc mode, the Marvell WiFi chipset it is connected to performs a periodic scan for other ad-hoc networks in the vicinity having the same SSID but a different BSSID. If a scan indicates the existence of such an ad-hoc network, the Marvell chipset initiates a procedure of merging networks. Networks merge into the one that was created earlier.
20 Secure Socket Protocol Secure Socket Protocol iChip supports the SSL3/TLS1 secure socket protocol, based on RFC2246. iChip supports the following Cipher suites: SSL_RSA_WITH_RC4_128_MD5 SSL_RSA_WITH_RC4_128_SHA SSL_RSA_WITH_3DES_EDE_CBC_SHA TLS_RSA_WITH_AES_128_CBC_SHA TLS_RSA_WITH_AES_256_CBC_SHA 20.1 Establishing An SSL3/TLS1 Socket Connection iChip supports a single SSL3/TLS1 TCP/IP active socket connection. Opening a secure socket on iChip involves two steps: 1. Open a standard TCP/IP socket to a secure server. 2. Initiate an SSL3/TLS1 handshake over the open socket to establish a secure session. SSL3/TLS1 handshake negotiations are initiated using the AT+iSSL command. iChip negotiates the secure connection based on several security-related parameters. It authenticates the remote secure server by verifying that the server‘s certificate is signed by a trusted Certificate Authority (CA). The trusted CA‘s certificate is stored in iChip‘s CA parameter. Following a successful SSL3/TLS1 handshake, iChip encrypts all data sent across the socket according to the cipher suite and keys agreed upon during the handshake. Data received on the socket is decrypted by iChip prior to making it available to the host processor. 20.2 Sending and Receiving Data over An SSL3/TLS1 Socket The AT+iSSND command is used to send data over an SSL3/TLS1 socket, using the same syntax as for non-secure sockets: AT+iSSND[%]:,: However, the size parameter is interpreted as the size of the data packet to encrypt. It is limited to 2K. Receiving data on an SSL3/TLS1 socket is carried out using the AT+iSRCV command. iChip automatically decrypts data that arrives on the secure socket. The data transferred to the host is always decrypted data. 20.3 SSL3/TLS1 Handshake and Session Example Take for example an SSL3/TLS1 server at secure.sslserver.com running a secure application on port 1503. Using iChip, the following sequence opens a secure SSL3/TLS1 socket to that application and exchanges data securely. For clarity, commands sent to iChip appear in bold and iChip replies appear in italics.
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Pub. No. 20-5000-08_21, January 200
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Revision History 20-5000-08_21 Revi
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Contents 10.1 +IWWW — ACTIVATE EM
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Contents 25.3 HEADER PARAMETER NAME
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Contents 33.4.5 +iRDL — Number of
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Contents 33.17.2 +iDSLT — DHCP Se
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Tables Tables Table 2-1 AT+i Comman
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AT+i Command Set If a syntax error
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2 General Format AT+i[[ | #UFn]…]
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General Format Command Function Par
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General Format Command Function Par
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AT+i Result Code Summary 85 RESERVE
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4 Report Status 4.1 +iRPi — Repor
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Report Option Format 10 I/(, , , )
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5 Connection 5.1 +iBDRA — Forces
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5.3 +iTUP — Triggered Internet Se
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5.4 +iDOWN — Terminate Internet S
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6 E-mail Send Commands E-mail Send
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Notes: E-mail Send Commands I/OK If
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7 E-Mail Retrieve 7.1 +iRML — Ret
Page 41 and 42: 7.3 +iRMM — Retrieve Mail Message
Page 43 and 44: E-Mail Receive (RMM) Flow Diagram I
Page 45 and 46: -or- specified. HTTP Client Interfa
Page 47 and 48: 9 SerialNET Mode Initiation 9.1 +iS
Page 49 and 50: 10 Web Server Interface 10.1 +iWWW
Page 51 and 52: 11 File Transfer Protocol (FTP) 11.
Page 53 and 54: 11.3 +iFDNL — FTP Directory Names
Page 55 and 56: 11.5 +iFCWD — FTP Change Working
Page 57 and 58: 11.7 +iFRCV — FTP Receive File Sy
Page 59 and 60: 11.9 +iFAPN — FTP Open File for A
Page 61 and 62: 11.11 +iFCLF — FTP Close File Syn
Page 63 and 64: 11.13 +iFCLS — FTP Close Session
Page 65 and 66: 12.2 +iTRCV — Telnet Receive Data
Page 67 and 68: 12.4 +iTBSN[%] — Telnet Send A By
Page 69 and 70: 12.6 +iTCLS — Telnet Close Sessio
Page 71 and 72: 13.2 +iSUDP — Open A Connectionle
Page 73 and 74: Direct Socket Interface 13.4 +iLSST
Page 75 and 76: 13.6 +iSCS — Get A Socket Connect
Page 77 and 78: Result Code: Direct Socket Interfac
Page 79 and 80: Direct Socket Interface I/ERROR If
Page 81 and 82: 13.10 +iSDMP — Dump Socket Buffer
Page 83 and 84: 13.12 +iSCLS — Close Socket Synta
Page 85 and 86: 15 Wireless LAN Mode Wireless LAN M
Page 87 and 88: 16 IP Registration IP Registration
Page 89 and 90: 17 DHCP Client DHCP Client A DHCP c
Page 91: 19 Ad-Hoc Networks Ad-Hoc Networks
Page 95 and 96: Secure Socket Protocol When the AT+
Page 97 and 98: 20.6 +i[@]FOPS — Secure FTP Open
Page 99 and 100: 22 MIME Encapsulated E-Mail Message
Page 101 and 102: 22.3 MIME-Encapsulated E-Mail Messa
Page 103 and 104: The control characters are defined
Page 105 and 106: 23.3 Software Flow Control During A
Page 107 and 108: 23.5 Host iChip Hardware Flow Cont
Page 109 and 110: Remote Firmware Update 2. If the do
Page 111 and 112: 25 iChip Parameter Update 25.1 Intr
Page 113 and 114: 25.4 Uploading A Parameters Update
Page 115 and 116: 26.3 Web Server Modes Two web serve
Page 117 and 118: 26.7 Host Interaction Mode iChip Em
Page 119 and 120: ~headline~ iChip Embedded Web Ser
Page 121 and 122: iChip Embedded Web Server Tags. Thi
Page 123 and 124: 27.3 RAS Theory of Operation iChip
Page 125 and 126: 28 SerialNET Theory of Operation 28
Page 127 and 128: SerialNET Theory of Operation bytes
Page 129 and 130: SerialNET Theory of Operation If th
Page 131 and 132: Accumulate Quiet Time 29.5 FTP Rece
Page 133 and 134: Secure Socket Protocol Theory of Op
Page 135 and 136: [ CA_default_policy ] commonName =
Page 137 and 138: Secure Socket Protocol Theory of Op
Page 139 and 140: Remote AT+i Service iChip LAN will
Page 141 and 142: Nonvolatile Parameter Database Para
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Nonvolatile Parameter Database Para
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Nonvolatile Parameter Database Para
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33.3 Operational Parameters 33.3.1
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33.3.3 +iMIS — Modem Initializati
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2. AT+iMIS=‖ 3. AT+iBDRF=3 4. AT+
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33.3.6 +iTTO — TCP Timeout Syntax
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33.3.8 +iMPS — Max PPP Packet Siz
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Nonvolatile Parameter Database 33.3
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33.3.14 +iFLW — Set Flow Control
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33.3.16 +iPSE — Set Power Save Mo
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33.3.18 +iDF — IP Protocol ‘Don
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33.4 ISP Connection Parameters 33.4
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33.4.3 +iUSRN — Define Connection
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33.4.5 +iRDL — Number of Times to
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33.5 Server Profile Parameters 33.5
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33.5.3 +iSMTP — Define SMTP Serve
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33.5.7 +iPOP3 — Define POP3 Serve
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33.7 Email Format Parameters Nonvol
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33.7.4 +iDELF — Email Delete Filt
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33.7.6 +iTOA — Define Primary Add
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33.7.8 +iREA — Return Email Addre
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33.7.10 +iCCn — Define Alternate
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33.7.12 +iMST — Media Subtype Str
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33.8 HTTP Parameters Nonvolatile Pa
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33.9 RAS Server Parameters Nonvolat
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33.9.3 +iRAP — Password for RAS A
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33.10.2 +iDIP — iChip Default IP
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33.10.4 +iIPG — IP Address of the
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33.11 Wireless LAN Parameters 33.11
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33.11.3 +iWLWM — Wireless LAN WEP
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33.11.5 +iWLKn — Wireless LAN WEP
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33.11.7 +iWLPP — Personal Shared
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33.12 IP Registration Parameters No
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33.16 Secure Socket Protocol Parame
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33.16.3 +iCERT — Define SSL3/TLS1
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33.17 DHCP Server Parameters Nonvol
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34 Appendix A 34.1 MIME content typ
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Type Subtype image jpeg gif ief g3f
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MT=0 MST=‖text-plain‖ # CONNECT
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37 Index +i!RP11 - Ad-Hoc Network R
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Header Parameter Names and Values .
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