#include <string.h>
#include <curl/curl.h>
#define USERNAME "user@example.com"
#define PASSWORD "123qwerty"
#define SMTPSERVER "smtp.example.com"
#define SMTPPORT ":587"
#define RECIPIENT "<recipient@example.com>"
#define MAILFROM "<realuser@example.com>"
#define MULTI_PERFORM_HANG_TIMEOUT 60 * 1000
static const char *text[]={
"one\n",
"two\n",
"three\n",
" Hello, this is CURL email SMTP\n",
NULL
};
struct WriteThis {
int counter;
};
static size_t read_callback(void *ptr, size_t size, size_t nmemb, void *userp)
{
struct WriteThis *pooh = (struct WriteThis *)userp;
const char *data;
if(size*nmemb < 1)
return 0;
data = text[pooh->counter];
if(data) {
size_t len = strlen(data);
memcpy(ptr, data, len);
pooh->counter++;
return len;
}
return 0;
}
static struct timeval tvnow(void)
{
struct timeval now;
now.tv_sec = (long)time(NULL);
now.tv_usec = 0;
return now;
}
static long tvdiff(struct timeval newer, struct timeval older)
{
return (newer.tv_sec-older.tv_sec)*1000+
(newer.tv_usec-older.tv_usec)/1000;
}
int main(void)
{
CURL *curl;
CURLM *mcurl;
int still_running = 1;
struct timeval mp_start;
struct WriteThis pooh;
struct curl_slist* rcpt_list = NULL;
pooh.counter = 0;
curl_global_init(CURL_GLOBAL_DEFAULT);
curl = curl_easy_init();
if(!curl)
return 1;
mcurl = curl_multi_init();
if(!mcurl)
return 2;
rcpt_list = curl_slist_append(rcpt_list, RECIPIENT);
curl_easy_setopt(curl, CURLOPT_URL, "smtp://" SMTPSERVER SMTPPORT);
curl_easy_setopt(curl, CURLOPT_USERNAME, USERNAME);
curl_easy_setopt(curl, CURLOPT_PASSWORD, PASSWORD);
curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);
curl_easy_setopt(curl, CURLOPT_MAIL_FROM, MAILFROM);
curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, rcpt_list);
curl_easy_setopt(curl, CURLOPT_USE_SSL, (long)CURLUSESSL_ALL);
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
curl_easy_setopt(curl, CURLOPT_READDATA, &pooh);
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
curl_easy_setopt(curl, CURLOPT_SSLVERSION, 0L);
curl_easy_setopt(curl, CURLOPT_SSL_SESSIONID_CACHE, 0L);
curl_multi_add_handle(mcurl, curl);
mp_start = tvnow();
curl_multi_perform(mcurl, &still_running);
while(still_running) {
struct timeval timeout;
int rc;
fd_set fdread;
fd_set fdwrite;
fd_set fdexcep;
int maxfd = -1;
long curl_timeo = -1;
FD_ZERO(&fdread);
FD_ZERO(&fdwrite);
FD_ZERO(&fdexcep);
timeout.tv_sec = 1;
timeout.tv_usec = 0;
curl_multi_timeout(mcurl, &curl_timeo);
if(curl_timeo >= 0) {
timeout.tv_sec = curl_timeo / 1000;
if(timeout.tv_sec > 1)
timeout.tv_sec = 1;
else
timeout.tv_usec = (curl_timeo % 1000) * 1000;
}
curl_multi_fdset(mcurl, &fdread, &fdwrite, &fdexcep, &maxfd);
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
if (tvdiff(tvnow(), mp_start) > MULTI_PERFORM_HANG_TIMEOUT) {
fprintf(stderr, "ABORTING TEST, since it seems "
"that it would have run forever.\n");
break;
}
switch(rc) {
case -1:
break;
case 0:
default:
curl_multi_perform(mcurl, &still_running);
break;
}
}
curl_slist_free_all(rcpt_list);
curl_multi_remove_handle(mcurl, curl);
curl_multi_cleanup(mcurl);
curl_easy_cleanup(curl);
curl_global_cleanup();
return 0;
}