1 files changed, 119 insertions, 0 deletions
diff --git a/src/lib-smtp/smtp-common.h b/src/lib-smtp/smtp-common.h
new file mode 100644
index 0000000..ec95dc0
--- /dev/null
+++ b/src/lib-smtp/smtp-common.h
@@ -0,0 +1,119 @@
+#ifndef SMTP_COMMON_H
+#define SMTP_COMMON_H
+
+#include "net.h"
+
+/*
+ * Limits
+ */
+
+#define SMTP_BASE_LINE_LENGTH_LIMIT (512 - 2)
+
+/*
+ * SMTP protocols
+ */
+
+enum smtp_protocol {
+	SMTP_PROTOCOL_SMTP = 0,
+	SMTP_PROTOCOL_LMTP
+};
+
+static inline const char *
+smtp_protocol_name(enum smtp_protocol proto)
+{
+	switch (proto) {
+	case SMTP_PROTOCOL_SMTP:
+		return "smtp";
+	case SMTP_PROTOCOL_LMTP:
+		return "lmtp";
+	default:
+		break;
+	}
+	i_unreached();
+}
+
+/* SMTP capabilities */
+
+enum smtp_capability {
+	SMTP_CAPABILITY_NONE                = 0,
+
+	SMTP_CAPABILITY_AUTH                = BIT(0),
+	SMTP_CAPABILITY_STARTTLS            = BIT(1),
+	SMTP_CAPABILITY_PIPELINING          = BIT(2),
+	SMTP_CAPABILITY_SIZE                = BIT(3),
+	SMTP_CAPABILITY_ENHANCEDSTATUSCODES = BIT(4),
+	SMTP_CAPABILITY_8BITMIME            = BIT(5),
+	SMTP_CAPABILITY_CHUNKING            = BIT(6),
+	SMTP_CAPABILITY_BINARYMIME          = BIT(7),
+	SMTP_CAPABILITY_BURL                = BIT(8),
+	SMTP_CAPABILITY_DSN                 = BIT(9),
+	SMTP_CAPABILITY_VRFY                = BIT(10),
+	SMTP_CAPABILITY_ETRN                = BIT(11),
+	SMTP_CAPABILITY_XCLIENT             = BIT(12),
+
+	SMTP_CAPABILITY__ORCPT              = BIT(24),
+};
+
+struct smtp_capability_name {
+	const char *name;
+	enum smtp_capability capability;
+};
+
+struct smtp_capability_extra {
+	const char *name;
+	const char *const *params;
+};
+
+extern const struct smtp_capability_name smtp_capability_names[];
+
+enum smtp_capability smtp_capability_find_by_name(const char *cap_name);
+
+/*
+ * SMTP proxy data
+ */
+
+enum smtp_proxy_protocol {
+	SMTP_PROXY_PROTOCOL_UNKNOWN = 0,
+	SMTP_PROXY_PROTOCOL_SMTP,
+	SMTP_PROXY_PROTOCOL_ESMTP,
+	SMTP_PROXY_PROTOCOL_LMTP
+};
+
+struct smtp_proxy_data_field {
+	const char *name;
+	const char *value;
+};
+ARRAY_DEFINE_TYPE(smtp_proxy_data_field, struct smtp_proxy_data_field);
+
+struct smtp_proxy_data {
+	/* PROTO */
+	enum smtp_proxy_protocol proto;
+	/* ADDR */
+	struct ip_addr source_ip;
+	/* PORT */
+	in_port_t source_port;
+	/* HELO, LOGIN */
+	const char *helo, *login;
+	/* SESSION */
+	const char *session;
+
+	/* TTL: send as this -1, so the default 0 means "don't send it" */
+	unsigned int ttl_plus_1;
+	/* TIMEOUT: remote is notified that the connection is going to be closed
+	   after this many seconds, so it should try to keep lock waits and such
+	   lower than this. */
+	unsigned int timeout_secs;
+
+	/* additional fields */
+	const struct smtp_proxy_data_field *extra_fields;
+	unsigned int extra_fields_count;
+};
+
+/*
+ * SMTP proxy data
+ */
+
+void smtp_proxy_data_merge(pool_t pool, struct smtp_proxy_data *dst,
+			   const struct smtp_proxy_data *src);
+
+#endif