Fix up the build

This copies the last version of the 1.10 clamsmtp common/
files into this project. They used to be shared with the proxsmtp
project but that project has since diverged.

1 files changed, 283 insertions, 0 deletions

diff --git a/common/smtppass.h b/common/smtppass.h
new file mode 100644
index 0000000..9733447
--- /dev/null
+++ b/common/smtppass.h
@@ -0,0 +1,283 @@
+/*
+ * Copyright (c) 2004, Stefan Walter
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met:
+ * 
+ *     * Redistributions of source code must retain the above 
+ *       copyright notice, this list of conditions and the 
+ *       following disclaimer.
+ *     * Redistributions in binary form must reproduce the 
+ *       above copyright notice, this list of conditions and 
+ *       the following disclaimer in the documentation and/or 
+ *       other materials provided with the distribution.
+ *     * The names of contributors to this software may not be 
+ *       used to endorse or promote products derived from this 
+ *       software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 
+ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 
+ * DAMAGE.
+ * 
+ *
+ * CONTRIBUTORS
+ *  Stef Walter <stef@memberwebs.com>
+ *
+ */ 
+
+#ifndef __SMTPPASS_H__
+#define __SMTPPASS_H__
+
+/* Forward declarations */
+struct sockaddr_any;
+struct spctx;
+
+/* -----------------------------------------------------------------------------
+ * BUFFERED MULTIPLEXING IO
+ * 
+ * This isn't meant to be a replacement library for all sorts of IO
+ * only things that are currently used go here. 
+ */
+
+/* 
+ * A generous maximum line length. It needs to be longer than 
+ * a full path on this system can be, because we pass the file
+ * name to clamd.
+ */
+ 
+#if 2000 > MAXPATHLEN
+    #define SP_LINE_LENGTH 2000
+#else
+    #define SP_LINE_LENGTH (MAXPATHLEN + 128)
+#endif
+
+typedef struct spio
+{
+    int fd;                             /* The file descriptor wrapped */
+    const char* name;                   /* The name for logging */
+    time_t last_action;                 /* Time of last action on descriptor */
+    char peername[MAXPATHLEN];          /* Name of the peer on other side of socket */
+    char localname[MAXPATHLEN];         /* Address where we accepted the connection */
+    
+    /* Internal use only */
+    char line[SP_LINE_LENGTH];  
+    char* _nx;
+    size_t _ln;                         
+}
+spio_t;
+
+#define spio_valid(io)      ((io) && (io)->fd != -1)
+
+/* Setup the io structure (allocated elsewhere) */
+void spio_init(spio_t* io, const char* name);
+
+/* Attach an open descriptor to a socket, optionally returning the peer */
+void spio_attach(struct spctx* ctx, spio_t* io, int fd, struct sockaddr_any* peer);
+
+/* Connect and disconnect from sockets */
+int  spio_connect(struct spctx* ctx, spio_t* io, const struct sockaddr_any* sany, const char* addrname);
+void spio_disconnect(struct spctx* ctx, spio_t* io);
+
+#define SPIO_TRIM           0x00000001
+#define SPIO_DISCARD        0x00000002
+#define SPIO_QUIET          0x00000004
+
+/* Read a line from a socket. Use options above. Line 
+ * will be found in io->line */
+int spio_read_line(struct spctx* ctx, spio_t* io, int opts);
+
+/* Write data to socket (must supply line endings if needed). 
+ * Guaranteed to accept all data or fail. */
+int spio_write_data(struct spctx* ctx, spio_t* io, const char* data);
+int spio_write_dataf(struct spctx* ctx, spio_t* io, const char* fmt, ...);
+int spio_write_data_raw(struct spctx* ctx, spio_t* io, const unsigned char* buf, int len);
+
+/* Empty the given socket */
+void spio_read_junk(struct spctx* sp, spio_t* io);
+    
+/* Pass up to 31 spio_t*, followed by NULL. Returns bitmap of ready for reading */
+unsigned int  spio_select(struct spctx* ctx, ...);
+
+
+/* -----------------------------------------------------------------------------
+ * SMTP PASS THROUGH FUNCTIONALITY
+ */
+ 
+/* Log lines have to be under roughly 900 chars otherwise 
+ * they get truncated by syslog. */
+#define SP_LOG_LINE_LEN  768
+
+typedef struct spctx
+{ 
+    unsigned int id;                /* Identifier for the connection */
+
+    spio_t client;                  /* Connection to client */
+    spio_t server;                  /* Connection to server */
+
+    FILE* cachefile;                /* The file handle for the cached file */
+    char cachename[MAXPATHLEN];     /* The name of the file that we cache into */
+    char logline[SP_LOG_LINE_LEN];  /* Log line */  
+
+    char* sender;                   /* The email of the sender */
+    char* recipients;               /* The email of the recipients */
+    char* xforwardaddr;             /* The IP address proxied for */
+    char* xforwardhelo;             /* The HELO/EHLO proxied for */
+
+    int _crlf;                      /* Private data */
+}
+spctx_t;
+
+/* 
+ * sp_init initializes the SMTP Pass-Through functionality 
+ * The name passed is the name of the app 
+ */
+void sp_init(const char* name);
+
+/*
+ * This starts up the smtp pass thru program. It will call
+ * the cb_* functions as appropriate.
+ */
+int sp_run(const char* configfile, const char* pidfile, int dbg_level);
+
+/* 
+ * Mark the application as shutting down. 
+ * A signal will interupt most IO.
+ */
+void sp_quit();
+
+/*
+ * Check if the application has been marked to quit.
+ * Useful for checking after interupted IO.
+ */
+int sp_is_quit();
+            
+/* 
+ * Called to cleanup SMTP Pass-Through functionality just
+ * before the application quits.
+ */
+void sp_done();
+
+/* 
+ * clamsmtpd used to accept command line args. In order to 
+ * process those args it needs to send the values to the 
+ * config file routines. This is how it does that.
+ */
+#ifdef SP_LEGACY_OPTIONS
+int sp_parse_option(const char* name, const char* option);
+#endif
+
+
+/* 
+ * The following functions are to be called from within 
+ * the spc_check_data function.
+ */
+ 
+/* 
+ * Adds a piece of info to the log line 
+ */
+void sp_add_log(spctx_t* ctx, char* prefix, char* line);
+
+/* 
+ * Reads a line of DATA from client. Or less than a line if 
+ * line is longer than LINE_LENGTH. No trimming or anything
+ * is done on the read line. This will end automatically
+ * when <CRLF>.<CRLF> is detected (in which case 0 will 
+ * be returned). The data is returned in data.
+ */
+int sp_read_data(spctx_t* ctx, const char** data);
+
+/*
+ * Writes a line (or piece) of data to a file buffer which is 
+ * later sent to the client using sp_done_data. Calling it with
+ * a NULL buffer closes the cache file. Guaranteed to accept
+ * all data given to it or fail.
+ */
+int sp_write_data(spctx_t* ctx, const char* buf, int buflen);
+
+/*
+ * Sends all DATA from the client into the cache. The cache
+ * file is then available (in spctx_t->cachename) for use.
+ */
+int sp_cache_data(spctx_t* ctx);
+
+/* 
+ * Sends the data in file buffer off to server. This is 
+ * completes a successful mail transfer. 
+ */
+int sp_done_data(spctx_t* ctx, const char *header);
+
+/* 
+ * Fails the data, deletes any temp data, and sends given 
+ * status to client or if NULL then SMTP_DATAFAILED 
+ */
+int sp_fail_data(spctx_t* ctx, const char* smtp_status);
+
+/*
+ * Setup the environment with context info. This is useful
+ * if you're going to fork another process. Be sure to exec
+ * soon after to prevent the strings from going out of scope. 
+ */
+void sp_setup_forked(spctx_t* ctx, int file);
+
+/* 
+ * Log a message. levels are syslog levels. Syntax is just
+ * like printf etc.. Can specify a ctx of NULL in which case
+ * no connection prefix is prepended.
+ */
+void sp_message(spctx_t* ctx, int level, const char* msg, ...);
+void sp_messagex(spctx_t* ctx, int level, const char* msg, ...);
+
+/*
+ * Lock or unlock the main mutex around thread common 
+ * functionality.
+ */
+void sp_lock();
+void sp_unlock();
+
+
+/* -----------------------------------------------------------------------------
+ * CALLBACKS IMPLMEMENTED BY PROGRAM
+ */
+
+/* 
+ * The following functions create and destroy contexts for a new 
+ * thread. Perform initialization in there and return a spctx
+ * structure for the thread to use. Return NULL failed. Be sure 
+ * to log message.
+ */
+extern spctx_t* cb_new_context();
+extern void cb_del_context(spctx_t* ctx);
+
+/* 
+ * Called when the data section of an email is being transferred.
+ * Once inside this function you can transfer files using 
+ * sp_read_data, sp_write_data.
+ * 
+ * After scanning or figuring out the status call either 
+ * sp_done_data or sp_fail_data. Most failures should be handled
+ * internally using sp_fail_data, unless it's an out of memory
+ * condition, or sp_fail_data failed.
+ */
+extern int cb_check_data(spctx_t* ctx);
+
+/* 
+ * Parse options from the config file. The memory for these
+ * options will stay around until sp_done is called. Return 0
+ * for unrecognized options, 1 for recognized, and quit the 
+ * program for invalid.
+ */
+extern int cb_parse_option(const char* name, const char* value);
+
+
+#endif /* __SMTPPASS_H__ */