turned CURLOPT_MAIL_RCPT into a curl_slist list instead to support multiple

receivers, and made the command line tool thus support the option specified
many times

3 files changed, 20 insertions, 5 deletions

diff --git a/lib/smtp.c b/lib/smtp.c
index 5dd90298b..0f34c4f9e 100644
--- a/lib/smtp.c
+++ b/lib/smtp.c
@@ -345,8 +345,23 @@ static CURLcode smtp_state_mail_resp(struct connectdata *conn,
   }
   else {
     /* send RCPT TO */
-    result = Curl_pp_sendf(&conn->proto.smtpc.pp, "RCPT TO:%s",
-                           data->set.str[STRING_MAIL_RCPT]);
+    struct curl_slist *rcpt;
+    char *buffer = NULL;
+
+    for(rcpt = data->set.mail_rcpt; rcpt; rcpt=rcpt->next) {
+      char *add = aprintf("%s%s%s", buffer?buffer:"", buffer?", ":"",
+                          rcpt->data);
+      if(!add) {
+        free(buffer);
+        return CURLE_OUT_OF_MEMORY;
+      }
+      buffer = add;
+    }
+
+    result = Curl_pp_sendf(&conn->proto.smtpc.pp, "RCPT TO:%s", buffer);
+
+    free(buffer);
+
     if(result)
       return result;
 
diff --git a/lib/url.c b/lib/url.c
index 05055acba..3f2f1cd72 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -2314,8 +2314,8 @@ CURLcode Curl_setopt(struct SessionHandle *data, CURLoption option,
     break;
 
   case CURLOPT_MAIL_RCPT:
-    result = setstropt(&data->set.str[STRING_MAIL_RCPT],
-                       va_arg(param, char *));
+    /* get a list of mail recipients */
+    data->set.mail_rcpt = va_arg(param, struct curl_slist *);
     break;
 
   default:
diff --git a/lib/urldata.h b/lib/urldata.h
index 6c852e8ad..4bcb5bf6f 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -1166,7 +1166,6 @@ enum dupstring {
   STRING_SOCKS5_GSSAPI_SERVICE,  /* GSSAPI service name */
 #endif
   STRING_MAIL_FROM,
-  STRING_MAIL_RCPT,
 
   /* -- end of strings -- */
   STRING_LAST /* not used, just an end-of-list marker */
@@ -1337,6 +1336,7 @@ struct UserDefined {
 #if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
   long socks5_gssapi_nec; /* flag to support nec socks5 server */
 #endif
+  struct curl_slist *mail_rcpt; /* linked list of mail recipients */
 };
 
 struct Names {