mongoose/examples/smtp-client/main.c
2022-09-20 11:34:22 +01:00

81 lines
2.8 KiB
C

#include "mongoose.h"
static const char *user = "aaa@gmail.com"; // Change this! Your gmail account
static const char *pass = "xxxxxxxxxxxxx"; // Change this! Your gmail password
static const char *to = "bbb@gmail.com"; // Change this! Destination email
static const char *from = "My Mail Sender";
static const char *subj = "test email from mongoose library!";
static const char *mesg = "Hi!\nThis is a test message.\nBye.";
static bool s_quit;
enum { EHLO, STARTTLS, STARTTLS_WAIT, AUTH, FROM, TO, DATA, BODY, QUIT, END };
static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
uint8_t *state = (uint8_t *) c->label;
if (ev == MG_EV_OPEN) {
// c->is_hexdumping = 1;
} else if (ev == MG_EV_READ) {
if (c->recv.len > 0 && c->recv.buf[c->recv.len - 1] == '\n') {
MG_INFO(("<-- %.*s", (int) c->recv.len - 2, c->recv.buf));
c->recv.len = 0;
if (*state == EHLO) {
mg_printf(c, "EHLO gmail.com\r\n");
*state = c->is_tls ? AUTH : STARTTLS;
} else if (*state == STARTTLS) {
mg_printf(c, "STARTTLS\r\n");
*state = STARTTLS_WAIT;
} else if (*state == STARTTLS_WAIT) {
struct mg_tls_opts opts = {.ca = "/tmp/ca.pem"};
mg_tls_init(c, &opts);
*state = EHLO;
} else if (*state == AUTH) {
char a[100], b[300] = "";
size_t n = mg_snprintf(a, sizeof(a), "%c%s%c%s", 0, user, 0, pass);
mg_base64_encode((uint8_t *) a, n, b);
mg_printf(c, "AUTH PLAIN %s\r\n", b);
*state = FROM;
} else if (*state == FROM) {
mg_printf(c, "MAIL FROM: <%s>\r\n", user);
*state = TO;
} else if (*state == TO) {
mg_printf(c, "RCPT TO: <%s>\r\n", to);
*state = DATA;
} else if (*state == DATA) {
mg_printf(c, "DATA\r\n");
*state = BODY;
} else if (*state == BODY) {
mg_printf(c, "From: %s <%s>\r\n", from, user); // Mail header
mg_printf(c, "Subject: %s\r\n", subj); // Mail header
mg_printf(c, "\r\n"); // End of headers
mg_printf(c, "%s\r\n", mesg); // Mail body
mg_printf(c, ".\r\n"); // End of body
*state = QUIT;
} else if (*state == QUIT) {
mg_printf(c, "QUIT\r\n");
*state = END;
} else {
c->is_draining = 1;
MG_INFO(("end"));
}
MG_INFO(("--> %.*s", (int) c->send.len - 2, c->send.buf));
}
} else if (ev == MG_EV_CLOSE) {
s_quit = true;
} else if (ev == MG_EV_TLS_HS) {
MG_INFO(("TLS handshake done!"));
mg_printf(c, "EHLO gmail.com\r\n");
}
(void) fn_data, (void) ev_data;
}
int main(void) {
struct mg_mgr mgr;
mg_mgr_init(&mgr);
// mg_log_set(MG_LL_VERBOSE);
mg_connect(&mgr, "tcp://smtp.gmail.com:587", fn, NULL);
while (s_quit == false) mg_mgr_poll(&mgr, 1000);
return 0;
}