1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/*****************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
*
* This is an example application source code sending SMTP mail using the
* multi interface.
*/
#include <string.h>
#include <curl/curl.h>
/*
* This is the list of basic details you need to tweak to get things right.
*/
#define USERNAME "user@example.com"
#define PASSWORD "123qwerty"
#define SMTPSERVER "smtp.example.com"
#define SMTPPORT ":587" /* it is a colon+port string, but you can set it
to "" to use the default port */
#define RECIPIENT "<recipient@example.com>"
#define MAILFROM "<realuser@example.com>"
#define MULTI_PERFORM_HANG_TIMEOUT 60 * 1000
/* Note that you should include the actual meta data headers here as well if
you want the mail to have a Subject, another From:, show a To: or whatever
you think your mail should feature! */
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++; /* advance pointer */
return len;
}
return 0; /* no more data left to deliver */
}
static struct timeval tvnow(void)
{
/*
** time() returns the value of time in seconds since the Epoch.
*/
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;
char mp_timedout = 0;
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);
/* more addresses can be added here
rcpt_list = curl_slist_append(rcpt_list, "<others@example.com>");
*/
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, CURLUSESSL_ALL);
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER,0);
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
curl_easy_setopt(curl, CURLOPT_READDATA, &pooh);
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
curl_easy_setopt(curl, CURLOPT_SSLVERSION, 0);
curl_easy_setopt(curl, CURLOPT_SSL_SESSIONID_CACHE, 0);
curl_multi_add_handle(mcurl, curl);
mp_timedout = 0;
mp_start = tvnow();
/* we start some action by calling perform right away */
curl_multi_perform(mcurl, &still_running);
while(still_running) {
struct timeval timeout;
int rc; /* select() return code */
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);
/* set a suitable timeout to play around with */
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;
}
/* get file descriptors from the transfers */
curl_multi_fdset(mcurl, &fdread, &fdwrite, &fdexcep, &maxfd);
/* In a real-world program you OF COURSE check the return code of the
function calls. On success, the value of maxfd is guaranteed to be
greater or equal than -1. We call select(maxfd + 1, ...), specially in
case of (maxfd == -1), we call select(0, ...), which is basically equal
to sleep. */
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:
/* select error */
break;
case 0: /* timeout */
default: /* action */
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;
}
|
