Hi.
Not sure if this helps, but some time ago I wanted to send email status
reports from an embedded device.
I did it like this:
3 parts of the email message
1) To connect to the smtp server
char email[] = "HELO some.smtp.server\r\nMAIL FROM: [EMAIL PROTECTED] TO: [EMAIL
PROTECTED] message is:\r\n";
Replace [EMAIL PROTECTED] with actual email addresses.
2) strcat the actual data, gathered and formatted somewhere else with 1)
3) End communicating with smtp server and strcat with the rest
char part3[] = "\r\n.\r\nquit\r\n";
The actual function taking care of establishing the tcp connection etc. is
something like this:
char string[255];
void sendmessage()
{
struct tcp_pcb *pcb;
struct ip_addr ipaddr;
u16_t port = 25; //smtp
err_t err;
strcat(string,email);
strcat(string,data);
strcat(string,part3);
IP4_ADDR(&ipaddr, xxx,xxx,xxx,xxx); //IP address of smtp server
pcb = tcp_new();
tcp_bind(pcb, IP_ADDR_ANY, 100);
err = tcp_connect(pcb, &ipaddr, port, write_email);
}
Where the function write_email is this:
static err_t write_email(void *arg, struct tcp_pcb *tpcb, err_t err)
{
err_t new_err;
new_err=tcp_write(tpcb,(void *)string,sizeof(string),0);
return new_err;
}
This was just a simple hack I put together to report the current IP
address of the embedded device (M32C Microcontroller) which it got from
a DHCP server.
Best regards,
Johan
On Wed, 4 Jan 2006, Wang Zheng wrote:
hi all,
I want to port a snmp protocol to the lwip.
Is there anybody has some interrelated experience. And would you like to give
me some advice or give me some samples. Where should I begin with ?
thanks!
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