POP3c_Connect()
Establishes a TCP connection with the POP3 server.
Files
pop3-c.h/pop3-c.c
Prototype
NET_SOCK_ID POP3c_Connect (NET_IP_ADDR ip_server, CPU_INT16U port, CPU_BOOLEAN secure, NET_ERR *perr); |
Arguments
ip_server IP address of the POP3 server to contact.
port TCP port to use. If ‘0’, pre-configured port is used.
secure Desired value for client secure mode.
perr Pointer to a variable that will hold the return error code from this function:
POP3c_ERR_NONE
POP3c_ERR_SOCK_OPEN_FAILED
POP3c_ERR_SOCK_CONN_FAILED
POP3c_ERR_NEG_RESP
POP3c_ERR_RX_FAILED
Returned Values
Connected socket ID, if no errors;
-1, otherwise.
Required Configuration
The network security manager MUST be available and enabled to open a secure POP3 connection (i.e: in “net_cfg.h”, NET_SECURE_CFG_EN should be DEF_ENABLED AND NET_CFG_TRANSPORT_LAYER_SEL should be configured for TCP). See µC/TCPIP user manual for more information about the network security manager.
A network security module MUST be included in the project (i.e: µC/SSL) to use the network security manager functionalities.
Notes / Warnings
If anything goes wrong while trying to connect to the server, the socket is closed by calling NetSock_Close(). Hence, all data structures are returned to their original state in case of a failure.
Before opening a secure POP3 connection, a certificate authority MUST be installed to validate the server identity.
Example Usage