-/* $Cambridge: exim/src/src/dcc.c,v 1.5 2009/11/12 08:34:23 nm4 Exp $ */
-
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) Wolfgang Breyha 2005-2009
+/* Copyright (c) Wolfgang Breyha 2005 - 2019
* Vienna University Computer Center
* wbreyha@gmx.net
* See the file NOTICE for conditions of use and distribution.
+ *
+ * Copyright (c) The Exim Maintainers 2015 - 2019
*/
-/* This patch is based on code from Tom Kistners exiscan (ACL integration) and
- * the DCC local_scan patch from Christopher Bodenstein */
-
/* Code for calling dccifd. Called from acl.c. */
#include "exim.h"
#include "dcc.h"
#include "unistd.h"
-uschar dcc_header_str[256];
-uschar dcc_result_str[256];
+#define DCC_HEADER_LIMIT 120
+
int dcc_ok = 0;
int dcc_rc = 0;
/* This function takes a file descriptor and a buffer as input and
* returns either 0 for success or errno in case of error. */
-int flushbuffer (int socket, uschar *buffer)
- {
+int flushbuffer (int socket, gstring *buffer)
+{
int retval, rsp;
- rsp = write(socket, buffer, Ustrlen(buffer));
+ rsp = write(socket, buffer->s, buffer->ptr);
DEBUG(D_acl)
- debug_printf("Result of the write() = %d\n", rsp);
- if(rsp < 0)
- {
+ debug_printf("DCC: flushbuffer(): Result of the write() = %d\n", rsp);
+ if(rsp < 0) {
DEBUG(D_acl)
- debug_printf("Error writing buffer to socket: %s\n", strerror(errno));
+ debug_printf("DCC: flushbuffer(): Error writing buffer to socket: %s\n", strerror(errno));
retval = errno;
- } else {
+ }
+ else {
DEBUG(D_acl)
- debug_printf("Wrote buffer to socket:\n%s\n", buffer);
+ debug_printf("DCC: flushbuffer(): Wrote buffer to socket:\n%.*s\n", buffer->ptr, buffer->s);
retval = 0;
}
return retval;
}
-int dcc_process(uschar **listptr) {
+int
+dcc_process(uschar **listptr)
+{
int sep = 0;
- uschar *list = *listptr;
+ const uschar *list = *listptr;
FILE *data_file;
- uschar *dcc_daemon_ip = US"";
uschar *dcc_default_ip_option = US"127.0.0.1";
- uschar *dcc_ip_option = US"";
uschar *dcc_helo_option = US"localhost";
- uschar *dcc_reject_message = US"Rejected by DCC";
uschar *xtra_hdrs = NULL;
+ uschar *override_client_ip = NULL;
/* from local_scan */
- int i, j, k, c, retval, sockfd, resp, line;
+ int dcc_resplen, retval, sockfd, resp;
unsigned int portnr;
struct sockaddr_un serv_addr;
struct sockaddr_in serv_addr_in;
struct hostent *ipaddress;
uschar sockpath[128];
uschar sockip[40], client_ip[40];
- uschar opts[128];
- uschar rcpt[128], from[128];
- uschar sendbuf[4096];
- uschar recvbuf[4096];
- uschar xhdr[256];
- uschar dcc_return_text[1024];
- uschar mbox_path[1024];
- uschar message_subdir[2];
- struct header_line *dcchdr;
+ gstring *dcc_headers;
+ gstring *sendbuf;
+ uschar *dcc_return_text;
+ struct header_line *mail_headers;
uschar *dcc_acl_options;
- uschar dcc_acl_options_buffer[10];
- uschar dcc_xtra_hdrs[1024];
+ gstring *dcc_xtra_hdrs;
+ gstring *dcc_header_str;
/* grep 1st option */
- if ((dcc_acl_options = string_nextinlist(&list, &sep,
- dcc_acl_options_buffer,
- sizeof(dcc_acl_options_buffer))) != NULL)
- {
+ if ((dcc_acl_options = string_nextinlist(&list, &sep, NULL, 0))) {
/* parse 1st option */
- if ( (strcmpic(dcc_acl_options,US"false") == 0) ||
- (Ustrcmp(dcc_acl_options,"0") == 0) ) {
- /* explicitly no matching */
- return FAIL;
- };
-
- /* special cases (match anything except empty) */
- if ( (strcmpic(dcc_acl_options,US"true") == 0) ||
- (Ustrcmp(dcc_acl_options,"*") == 0) ||
- (Ustrcmp(dcc_acl_options,"1") == 0) ) {
- dcc_acl_options = dcc_acl_options;
- };
+ if ( strcmpic(dcc_acl_options, US"false") == 0
+ || Ustrcmp(dcc_acl_options, "0") == 0)
+ return FAIL; /* explicitly no matching */
}
- else {
- /* empty means "don't match anything" */
- return FAIL;
- };
+ else
+ return FAIL; /* empty means "don't match anything" */
sep = 0;
/* if we scanned this message last time, just return */
- if ( dcc_ok )
- return dcc_rc;
+ if (dcc_ok)
+ return dcc_rc;
/* open the spooled body */
- message_subdir[1] = '\0';
- for (i = 0; i < 2; i++) {
- message_subdir[0] = (split_spool_directory == (i == 0))? message_id[5] : 0;
- sprintf(CS mbox_path, "%s/input/%s/%s-D", spool_directory, message_subdir, message_id);
- data_file = Ufopen(mbox_path,"rb");
- if (data_file != NULL)
+ for (int i = 0; i < 2; i++) {
+ uschar message_subdir[2];
+ set_subdir_str(message_subdir, message_id, i);
+ if ((data_file = Ufopen(
+ spool_fname(US"input", message_subdir, message_id, US"-D"), "rb")))
break;
- };
+ }
- if (data_file == NULL) {
+ if (!data_file) {
/* error while spooling */
log_write(0, LOG_MAIN|LOG_PANIC,
- "dcc acl condition: error while opening spool file");
+ "DCC: error while opening spool file");
return DEFER;
- };
+ }
/* Initialize the variables */
else
if( sscanf(CS dccifd_address, "%s %u", sockip, &portnr) != 2) {
log_write(0, LOG_MAIN,
- "dcc acl condition: warning - invalid dccifd address: '%s'", dccifd_address);
+ "DCC: warning - invalid dccifd address: '%s'", dccifd_address);
(void)fclose(data_file);
return DEFER;
}
}
- /* opts is what we send as dccifd options - see man dccifd */
+ /* dcc_headers is what we send as dccifd options - see man dccifd */
/* We don't support any other option than 'header' so just copy that */
- bzero(opts,sizeof(opts));
- Ustrncpy(opts, "header", sizeof(opts)-1);
- Ustrncpy(client_ip, dcc_ip_option, sizeof(client_ip)-1);
- /* If the dcc_client_ip is not provided use the
- * sender_host_address or 127.0.0.1 if it is NULL */
- DEBUG(D_acl)
- debug_printf("my_ip_option = %s - client_ip = %s - sender_host_address = %s\n", dcc_ip_option, client_ip, sender_host_address);
- if(!(Ustrcmp(client_ip, ""))){
- /* Do we have a sender_host_address or is it NULL? */
- if(sender_host_address){
- Ustrncpy(client_ip, sender_host_address, sizeof(client_ip)-1);
- } else {
- /* sender_host_address is NULL which means it comes from localhost */
- Ustrncpy(client_ip, dcc_default_ip_option, sizeof(client_ip)-1);
- }
+ dcc_headers = string_cat(NULL, dccifd_options);
+ /* if $acl_m_dcc_override_client_ip is set use it */
+ if (((override_client_ip = expand_string(US"$acl_m_dcc_override_client_ip")) != NULL) &&
+ (override_client_ip[0] != '\0')) {
+ Ustrncpy(client_ip, override_client_ip, sizeof(client_ip)-1);
+ DEBUG(D_acl)
+ debug_printf("DCC: Client IP (overridden): %s\n", client_ip);
}
- DEBUG(D_acl)
- debug_printf("Client IP: %s\n", client_ip);
- Ustrncpy(sockip, dcc_daemon_ip, sizeof(sockip)-1);
- /* strncat(opts, my_request, strlen(my_request)); */
- Ustrcat(opts, "\n");
- Ustrncat(opts, client_ip, sizeof(opts)-Ustrlen(opts)-1);
- Ustrncat(opts, "\nHELO ", sizeof(opts)-Ustrlen(opts)-1);
- Ustrncat(opts, dcc_helo_option, sizeof(opts)-Ustrlen(opts)-2);
- Ustrcat(opts, "\n");
+ else if(sender_host_address) {
+ /* else if $sender_host_address is available use that? */
+ Ustrncpy(client_ip, sender_host_address, sizeof(client_ip)-1);
+ DEBUG(D_acl)
+ debug_printf("DCC: Client IP (sender_host_address): %s\n", client_ip);
+ }
+ else {
+ /* sender_host_address is NULL which means it comes from localhost */
+ Ustrncpy(client_ip, dcc_default_ip_option, sizeof(client_ip)-1);
+ DEBUG(D_acl)
+ debug_printf("DCC: Client IP (default): %s\n", client_ip);
+ }
+ /* build options block */
+ dcc_headers = string_append(dcc_headers, 5, US"\n", client_ip, US"\nHELO ", dcc_helo_option, US"\n");
/* initialize the other variables */
- dcchdr = header_list;
+ mail_headers = header_list;
/* we set the default return value to DEFER */
retval = DEFER;
- bzero(sendbuf,sizeof(sendbuf));
- bzero(xhdr,sizeof(xhdr));
- bzero(rcpt,sizeof(rcpt));
- bzero(from,sizeof(from));
-
/* send a null return path as "<>". */
- if (Ustrlen(sender_address) > 0)
- Ustrncpy(from, sender_address, sizeof(from));
- else
- Ustrncpy(from, "<>", sizeof(from));
- Ustrncat(from, "\n", sizeof(from)-Ustrlen(from)-1);
+ dcc_headers = string_cat (dcc_headers, *sender_address ? sender_address : US"<>");
+ dcc_headers = string_catn(dcc_headers, US"\n", 1);
/**************************************
* Now creating the socket connection *
**************************************/
- /* If there is a dcc_daemon_ip, we use a tcp socket, otherwise a UNIX socket */
- if(Ustrcmp(sockip, "")){
- ipaddress = gethostbyname((char *)sockip);
- bzero((char *) &serv_addr_in, sizeof(serv_addr_in));
+ /* If sockip contains an ip, we use a tcp socket, otherwise a UNIX socket */
+ if(Ustrcmp(sockip, "")) {
+ ipaddress = gethostbyname(CS sockip);
+ bzero(CS &serv_addr_in, sizeof(serv_addr_in));
serv_addr_in.sin_family = AF_INET;
- bcopy((char *)ipaddress->h_addr, (char *)&serv_addr_in.sin_addr.s_addr, ipaddress->h_length);
+ bcopy(CS ipaddress->h_addr, CS &serv_addr_in.sin_addr.s_addr, ipaddress->h_length);
serv_addr_in.sin_port = htons(portnr);
- if ((sockfd = socket(AF_INET, SOCK_STREAM,0)) < 0){
+ if ((sockfd = socket(AF_INET, SOCK_STREAM,0)) < 0) {
DEBUG(D_acl)
- debug_printf("Creating socket failed: %s\n", strerror(errno));
- log_write(0,LOG_REJECT,"Creating socket failed: %s\n", strerror(errno));
+ debug_printf("DCC: Creating TCP socket connection failed: %s\n", strerror(errno));
+ log_write(0,LOG_PANIC,"DCC: Creating TCP socket connection failed: %s\n", strerror(errno));
/* if we cannot create the socket, defer the mail */
(void)fclose(data_file);
return retval;
}
/* Now connecting the socket (INET) */
- if (connect(sockfd, (struct sockaddr *)&serv_addr_in, sizeof(serv_addr_in)) < 0){
+ if (connect(sockfd, (struct sockaddr *)&serv_addr_in, sizeof(serv_addr_in)) < 0) {
DEBUG(D_acl)
- debug_printf("Connecting socket failed: %s\n", strerror(errno));
- log_write(0,LOG_REJECT,"Connecting socket failed: %s\n", strerror(errno));
+ debug_printf("DCC: Connecting to TCP socket failed: %s\n", strerror(errno));
+ log_write(0,LOG_PANIC,"DCC: Connecting to TCP socket failed: %s\n", strerror(errno));
/* if we cannot contact the socket, defer the mail */
(void)fclose(data_file);
return retval;
}
- } else {
+ }
+ else {
/* connecting to the dccifd UNIX socket */
- bzero((char *)&serv_addr,sizeof(serv_addr));
+ bzero(&serv_addr, sizeof(serv_addr));
serv_addr.sun_family = AF_UNIX;
- Ustrcpy(serv_addr.sun_path, sockpath);
- if ((sockfd = socket(AF_UNIX, SOCK_STREAM,0)) < 0){
+ Ustrncpy(US serv_addr.sun_path, sockpath, sizeof(serv_addr.sun_path));
+ if ((sockfd = socket(AF_UNIX, SOCK_STREAM,0)) < 0) {
DEBUG(D_acl)
- debug_printf("Creating socket failed: %s\n", strerror(errno));
- log_write(0,LOG_REJECT,"Creating socket failed: %s\n", strerror(errno));
+ debug_printf("DCC: Creating UNIX socket connection failed: %s\n", strerror(errno));
+ log_write(0,LOG_PANIC,"DCC: Creating UNIX socket connection failed: %s\n", strerror(errno));
/* if we cannot create the socket, defer the mail */
(void)fclose(data_file);
return retval;
}
/* Now connecting the socket (UNIX) */
- if (connect(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0){
+ if (connect(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
DEBUG(D_acl)
- debug_printf("Connecting socket failed: %s\n", strerror(errno));
- log_write(0,LOG_REJECT,"Connecting socket failed: %s\n", strerror(errno));
+ debug_printf("DCC: Connecting to UNIX socket failed: %s\n", strerror(errno));
+ log_write(0,LOG_PANIC,"DCC: Connecting to UNIX socket failed: %s\n", strerror(errno));
/* if we cannot contact the socket, defer the mail */
(void)fclose(data_file);
return retval;
}
/* the socket is open, now send the options to dccifd*/
DEBUG(D_acl)
- debug_printf("\n---------------------------\nSocket opened; now sending input\n-----------------\n");
- /* First, fill in the input buffer */
- Ustrncpy(sendbuf, opts, sizeof(sendbuf));
- Ustrncat(sendbuf, from, sizeof(sendbuf)-Ustrlen(sendbuf)-1);
-
- DEBUG(D_acl)
- {
- debug_printf("opts = %s\nsender = %s\nrcpt count = %d\n", opts, from, recipients_count);
- debug_printf("Sending options:\n****************************\n");
- }
+ debug_printf("DCC: -----------------------------------\nDCC: Socket opened; now sending input\n"
+ "DCC: -----------------------------------\n");
/* let's send each of the recipients to dccifd */
- for (i = 0; i < recipients_count; i++){
+ for (int i = 0; i < recipients_count; i++) {
DEBUG(D_acl)
- debug_printf("recipient = %s\n",recipients_list[i].address);
- if(Ustrlen(sendbuf) + Ustrlen(recipients_list[i].address) > sizeof(sendbuf))
- {
- DEBUG(D_acl)
- debug_printf("Writing buffer: %s\n", sendbuf);
- flushbuffer(sockfd, sendbuf);
- bzero(sendbuf, sizeof(sendbuf));
- }
- Ustrncat(sendbuf, recipients_list[i].address, sizeof(sendbuf)-Ustrlen(sendbuf)-1);
- Ustrncat(sendbuf, "\r\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1);
+ debug_printf("DCC: recipient = %s\n",recipients_list[i].address);
+ dcc_headers = string_append(dcc_headers, 2, recipients_list[i].address, "\n");
}
/* send a blank line between options and message */
- Ustrncat(sendbuf, "\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1);
+ dcc_headers = string_catn(dcc_headers, US"\n", 1);
/* Now we send the input buffer */
+ (void) string_from_gstring(dcc_headers);
DEBUG(D_acl)
- debug_printf("%s\n****************************\n", sendbuf);
- flushbuffer(sockfd, sendbuf);
+ debug_printf("DCC: ***********************************\nDCC: Sending options:\n%s"
+ "DCC: ***********************************\n", dcc_headers->s);
+ if (flushbuffer(sockfd, dcc_headers) != 0) {
+ (void)fclose(data_file);
+ return retval;
+ }
/* now send the message */
- /* Clear the input buffer */
- bzero(sendbuf, sizeof(sendbuf));
/* First send the headers */
- /* Now send the headers */
DEBUG(D_acl)
- debug_printf("Sending headers:\n****************************\n");
- Ustrncpy(sendbuf, dcchdr->text, sizeof(sendbuf)-2);
- while((dcchdr=dcchdr->next)) {
- if(dcchdr->slen > sizeof(sendbuf)-2) {
- /* The size of the header is bigger than the size of
- * the input buffer, so split it up in smaller parts. */
- flushbuffer(sockfd, sendbuf);
- bzero(sendbuf, sizeof(sendbuf));
- j = 0;
- while(j < dcchdr->slen)
- {
- for(i = 0; i < sizeof(sendbuf)-2; i++) {
- sendbuf[i] = dcchdr->text[j];
- j++;
- }
- flushbuffer(sockfd, sendbuf);
- bzero(sendbuf, sizeof(sendbuf));
- }
- } else if(Ustrlen(sendbuf) + dcchdr->slen > sizeof(sendbuf)-2) {
- flushbuffer(sockfd, sendbuf);
- bzero(sendbuf, sizeof(sendbuf));
- Ustrncpy(sendbuf, dcchdr->text, sizeof(sendbuf)-2);
- } else {
- Ustrncat(sendbuf, dcchdr->text, sizeof(sendbuf)-Ustrlen(sendbuf)-2);
- }
+ debug_printf("DCC: ***********************************\nDCC: Sending headers:\n");
+ sendbuf = string_get(8192);
+ sendbuf = string_catn(sendbuf, mail_headers->text, mail_headers->slen);
+ while((mail_headers=mail_headers->next)) {
+ sendbuf = string_catn(sendbuf, mail_headers->text, mail_headers->slen);
}
/* a blank line separates header from body */
- Ustrncat(sendbuf, "\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1);
- flushbuffer(sockfd, sendbuf);
+ sendbuf = string_catn(sendbuf, US"\r\n", 2);
+ (void) string_from_gstring(sendbuf);
+ gstring_release_unused(sendbuf);
DEBUG(D_acl)
- debug_printf("\n****************************\n%s", sendbuf);
-
- /* Clear the input buffer */
- bzero(sendbuf, sizeof(sendbuf));
+ debug_printf("%sDCC: ***********************************\n", sendbuf->s);
+ if (flushbuffer(sockfd, sendbuf) != 0) {
+ (void)fclose(data_file);
+ return retval;
+ }
/* now send the body */
DEBUG(D_acl)
- debug_printf("Writing body:\n****************************\n");
+ debug_printf("DCC: ***********************************\nDCC: Writing body:\n");
(void)fseek(data_file, SPOOL_DATA_START_OFFSET, SEEK_SET);
- while((fread(sendbuf, 1, sizeof(sendbuf)-1, data_file)) > 0) {
- flushbuffer(sockfd, sendbuf);
- bzero(sendbuf, sizeof(sendbuf));
+
+ gstring filebuf = { .size = big_buffer_size, .ptr = 0, .s = big_buffer };
+
+ while((filebuf.ptr = fread(filebuf.s, 1, filebuf.size, data_file)) > 0) {
+ if (flushbuffer(sockfd, &filebuf) != 0) {
+ (void)fclose(data_file);
+ return retval;
+ }
}
DEBUG(D_acl)
- debug_printf("\n****************************\n");
+ debug_printf("DCC: ***********************************\n");
/* shutdown() the socket */
- if(shutdown(sockfd, 1) < 0){
+ if(shutdown(sockfd, SHUT_WR) < 0) {
DEBUG(D_acl)
- debug_printf("Couldn't shutdown socket: %s\n", strerror(errno));
- log_write(0,LOG_MAIN,"Couldn't shutdown socket: %s\n", strerror(errno));
+ debug_printf("DCC: Couldn't shutdown socket: %s\n", strerror(errno));
+ log_write(0,LOG_MAIN,"DCC: Couldn't shutdown socket: %s\n", strerror(errno));
/* If there is a problem with the shutdown()
* defer the mail. */
(void)fclose(data_file);
return retval;
}
DEBUG(D_acl)
- debug_printf("\n-------------------------\nInput sent.\n-------------------------\n");
+ debug_printf("DCC: Input sent.\n"
+ "DCC: +++++++++++++++++++++++++++++++++++\n"
+ "DCC: Now receiving output from server\n"
+ "DCC: -----------------------------------\n");
- /********************************
+ /********************************
* receiving output from dccifd *
********************************/
- DEBUG(D_acl)
- debug_printf("\n-------------------------------------\nNow receiving output from server\n-----------------------------------\n");
/******************************************************************
* We should get 3 lines: *
* 3/ Third line contains the X-DCC header. *
******************************************************************/
- line = 1; /* we start at the first line of the output */
- j = 0; /* will be used as index for the recipients list */
- k = 0; /* initializing the index of the X-DCC header: xhdr[k] */
+ int line = 1; /* we start at the first line of the output */
+ int bufoffset;
+ dcc_header_str = string_get(DCC_HEADER_LIMIT + 2);
/* Let's read from the socket until there's nothing left to read */
- bzero(recvbuf, sizeof(recvbuf));
- while((resp = read(sockfd, recvbuf, sizeof(recvbuf)-1)) > 0) {
- /* How much did we get from the socket */
- c = Ustrlen(recvbuf) + 1;
+ while((dcc_resplen = read(sockfd, big_buffer, big_buffer_size-1)) > 0) {
+ /* fail on read error */
+ if(dcc_resplen < 0) {
+ DEBUG(D_acl)
+ debug_printf("DCC: Error reading from socket: %s\n", strerror(errno));
+ (void)fclose(data_file);
+ return retval;
+ }
+ /* make the answer 0-terminated. only needed for debug_printf */
DEBUG(D_acl)
- debug_printf("Length of the output buffer is: %d\nOutput buffer is:\n------------\n%s\n-----------\n", c, recvbuf);
+ debug_printf("DCC: Length of the output buffer is: %d\nDCC: Output buffer is:\n"
+ "DCC: -----------------------------------\n%.*s\n"
+ "DCC: -----------------------------------\n", dcc_resplen, dcc_resplen, big_buffer);
/* Now let's read each character and see what we've got */
- for(i = 0; i < c; i++) {
+ for(bufoffset = 0; bufoffset < dcc_resplen, line <= 2; bufoffset++) {
/* First check if we reached the end of the line and
* then increment the line counter */
- if(recvbuf[i] == '\n') {
+ if(big_buffer[bufoffset] == '\n')
line++;
- }
else {
/* The first character of the first line is the
* overall response. If there's another character
* on that line it is not correct. */
if(line == 1) {
- if(i == 0) {
+ if(bufoffset == 0) {
/* Now get the value and set the
* return value accordingly */
- if(recvbuf[i] == 'A') {
- DEBUG(D_acl)
- debug_printf("Overall result = A\treturning OK\n");
- Ustrcpy(dcc_return_text, "Mail accepted by DCC");
- dcc_result = US"A";
- retval = OK;
- }
- else if(recvbuf[i] == 'R') {
- DEBUG(D_acl)
- debug_printf("Overall result = R\treturning FAIL\n");
- dcc_result = US"R";
- retval = FAIL;
- if(sender_host_name) {
- log_write(0, LOG_MAIN, "H=%s [%s] F=<%s>: rejected by DCC", sender_host_name, sender_host_address, sender_address);
- }
- else {
- log_write(0, LOG_MAIN, "H=[%s] F=<%s>: rejected by DCC", sender_host_address, sender_address);
- }
- Ustrncpy(dcc_return_text, dcc_reject_message, Ustrlen(dcc_reject_message) + 1);
- }
- else if(recvbuf[i] == 'S') {
- DEBUG(D_acl)
- debug_printf("Overall result = S\treturning OK\n");
- Ustrcpy(dcc_return_text, "Not all recipients accepted by DCC");
- /* Since we're in an ACL we want a global result
- * so we accept for all */
- dcc_result = US"A";
- retval = OK;
- }
- else if(recvbuf[i] == 'G') {
- DEBUG(D_acl)
- debug_printf("Overall result = G\treturning FAIL\n");
- Ustrcpy(dcc_return_text, "Greylisted by DCC");
- dcc_result = US"G";
- retval = FAIL;
- }
- else if(recvbuf[i] == 'T') {
- DEBUG(D_acl)
- debug_printf("Overall result = T\treturning DEFER\n");
- retval = DEFER;
- log_write(0,LOG_MAIN,"Temporary error with DCC: %s\n", recvbuf);
- Ustrcpy(dcc_return_text, "Temporary error with DCC");
- dcc_result = US"T";
- }
- else {
- DEBUG(D_acl)
- debug_printf("Overall result = something else\treturning DEFER\n");
- retval = DEFER;
- log_write(0,LOG_MAIN,"Unknown DCC response: %s\n", recvbuf);
- Ustrcpy(dcc_return_text, "Unknown DCC response");
- dcc_result = US"T";
+ switch(big_buffer[bufoffset]) {
+ case 'A':
+ DEBUG(D_acl)
+ debug_printf("DCC: Overall result = A\treturning OK\n");
+ dcc_return_text = US"Mail accepted by DCC";
+ dcc_result = US"A";
+ retval = OK;
+ break;
+ case 'R':
+ DEBUG(D_acl)
+ debug_printf("DCC: Overall result = R\treturning FAIL\n");
+ dcc_return_text = US"Rejected by DCC";
+ dcc_result = US"R";
+ retval = FAIL;
+ if(sender_host_name)
+ log_write(0, LOG_MAIN, "H=%s [%s] F=<%s>: rejected by DCC",
+ sender_host_name, sender_host_address, sender_address);
+ else
+ log_write(0, LOG_MAIN, "H=[%s] F=<%s>: rejected by DCC",
+ sender_host_address, sender_address);
+ break;
+ case 'S':
+ DEBUG(D_acl)
+ debug_printf("DCC: Overall result = S\treturning OK\n");
+ dcc_return_text = US"Not all recipients accepted by DCC";
+ /* Since we're in an ACL we want a global result
+ * so we accept for all */
+ dcc_result = US"A";
+ retval = OK;
+ break;
+ case 'G':
+ DEBUG(D_acl)
+ debug_printf("DCC: Overall result = G\treturning FAIL\n");
+ dcc_return_text = US"Greylisted by DCC";
+ dcc_result = US"G";
+ retval = FAIL;
+ break;
+ case 'T':
+ DEBUG(D_acl)
+ debug_printf("DCC: Overall result = T\treturning DEFER\n");
+ dcc_return_text = US"Temporary error with DCC";
+ dcc_result = US"T";
+ retval = DEFER;
+ log_write(0,LOG_MAIN,"Temporary error with DCC: %s\n", big_buffer);
+ break;
+ default:
+ DEBUG(D_acl)
+ debug_printf("DCC: Overall result = something else\treturning DEFER\n");
+ dcc_return_text = US"Unknown DCC response";
+ dcc_result = US"T";
+ retval = DEFER;
+ log_write(0,LOG_MAIN,"Unknown DCC response: %s\n", big_buffer);
+ break;
}
}
else {
- /* We're on the first line but not on the first character,
- * there must be something wrong. */
- DEBUG(D_acl)
- debug_printf("Line = %d but i = %d != 0 character is %c - This is wrong!\n", line, i, recvbuf[i]);
- log_write(0,LOG_MAIN,"Wrong header from DCC, output is %s\n", recvbuf);
+ /* We're on the first line but not on the first character,
+ * there must be something wrong. */
+ DEBUG(D_acl) debug_printf("DCC: Line = %d but bufoffset = %d != 0"
+ " character is %c - This is wrong!\n", line, bufoffset, big_buffer[bufoffset]);
+ log_write(0,LOG_MAIN,"Wrong header from DCC, output is %s\n", big_buffer);
}
}
else if(line == 2) {
/* On the second line we get a list of
- * answer for each recipient. We don't care about
- * it because we're in an acl and so just take the
+ * answers for each recipient. We don't care about
+ * it because we're in an acl and take the
* global result. */
}
- else if(line > 2) {
- /* The third and following lines is the X-DCC header,
- * so we store it in xhdr. */
- /* check if we don't get more than what we can handle */
- if(k < sizeof(xhdr)) { /* xhdr has a length of 120 */
- xhdr[k] = recvbuf[i];
- k++;
- }
- else {
- DEBUG(D_acl)
- debug_printf("We got more output than we can store in the X-DCC header. Truncating at 120 characters.\n");
- }
- }
- else {
- /* Wrong line number. There must be a problem with the output. */
- DEBUG(D_acl)
- debug_printf("Wrong line number in output. Line number is %d\n", line);
- }
}
}
- /* we reinitialize the output buffer before we read again */
- bzero(recvbuf,sizeof(recvbuf));
+ if(line > 2) {
+ /* The third and following lines are the X-DCC header,
+ * so we store it in dcc_header_str up to our limit. */
+ /* check if buffer contains the end of the header .."\n\n" and truncate it */
+ if ((big_buffer[dcc_resplen-1] == '\n') &&
+ (big_buffer[dcc_resplen-2] == '\n'))
+ dcc_resplen -= 2;
+ dcc_resplen -= bufoffset;
+ if (dcc_header_str->ptr + dcc_resplen > DCC_HEADER_LIMIT) {
+ dcc_resplen = DCC_HEADER_LIMIT - dcc_header_str->ptr;
+ DEBUG(D_acl) debug_printf("DCC: We got more output than we can store"
+ "in the X-DCC header. Truncating at 120 characters.\n");
+ }
+ dcc_header_str = string_catn(dcc_header_str, &big_buffer[bufoffset], dcc_resplen);
+ }
}
- /* We have read everything from the socket */
-
- /* We need the terminate the X-DCC header with a '\n' character. This needs to be k-1
- * for xhdr[k] contains '\0'. */
- xhdr[k-1] = '\n';
+ /* We have read everything from the socket. make sure the header ends with "\n" */
+ dcc_header_str = string_catn(dcc_header_str, US"\n", 1);
+ (void) string_from_gstring(dcc_header_str);
/* Now let's sum up what we've got. */
DEBUG(D_acl)
- debug_printf("\n--------------------------\nOverall result = %d\nX-DCC header: %sReturn message: %s\ndcc_result: %s\n", retval, xhdr, dcc_return_text, dcc_result);
+ debug_printf("\nDCC: --------------------------\nDCC: Overall result = %d\n"
+ "DCC: X-DCC header: %sReturn message: %s\nDCC: dcc_result: %s\n",
+ retval, dcc_header_str->s, dcc_return_text, dcc_result);
/* We only add the X-DCC header if it starts with X-DCC */
- if(!(Ustrncmp(xhdr, "X-DCC", 5))){
- dcc_header = xhdr;
+ if(!(Ustrncmp(dcc_header_str->s, "X-DCC", 5))) {
+ dcc_header = dcc_header_str->s;
if(dcc_direct_add_header) {
- header_add(' ' , "%s", xhdr);
+ header_add(' ' , "%s", dcc_header_str->s);
/* since the MIME ACL already writes the .eml file to disk without DCC Header we've to erase it */
unspool_mbox();
}
}
else {
DEBUG(D_acl)
- debug_printf("Wrong format of the X-DCC header: %s\n", xhdr);
+ debug_printf("DCC: Wrong format of the X-DCC header: %.*s\n", dcc_header_str->ptr, dcc_header_str->s);
}
/* check if we should add additional headers passed in acl_m_dcc_add_header */
if(dcc_direct_add_header) {
if (((xtra_hdrs = expand_string(US"$acl_m_dcc_add_header")) != NULL) && (xtra_hdrs[0] != '\0')) {
- Ustrncpy(dcc_xtra_hdrs, xtra_hdrs, sizeof(dcc_xtra_hdrs) - 2);
- if (dcc_xtra_hdrs[Ustrlen(dcc_xtra_hdrs)-1] != '\n')
- Ustrcat(dcc_xtra_hdrs, "\n");
- header_add(' ', "%s", dcc_xtra_hdrs);
+ dcc_xtra_hdrs = string_cat(NULL, xtra_hdrs);
+ if (dcc_xtra_hdrs->s[dcc_xtra_hdrs->ptr - 1] != '\n')
+ dcc_xtra_hdrs = string_catn(dcc_xtra_hdrs, US"\n", 1);
+ header_add(' ', "%s", string_from_gstring(dcc_xtra_hdrs));
DEBUG(D_acl)
- debug_printf("adding additional headers in $acl_m_dcc_add_header: %s", dcc_xtra_hdrs);
+ debug_printf("DCC: adding additional headers in $acl_m_dcc_add_header: %.*s", dcc_xtra_hdrs->ptr, dcc_xtra_hdrs->s);
}
}
dcc_ok = 1;
/* Now return to exim main process */
DEBUG(D_acl)
- debug_printf("Before returning to exim main process:\nreturn_text = %s - retval = %d\ndcc_result = %s\n", dcc_return_text, retval, dcc_result);
+ debug_printf("DCC: Before returning to exim main process:\nDCC: return_text = %s - retval = %d\n"
+ "DCC: dcc_result = %s\n", dcc_return_text, retval, dcc_result);
(void)fclose(data_file);
dcc_rc = retval;
git://git.exim.org / exim.git / blobdiff