X-Git-Url: https://vcs.fsf.org/?p=exim.git;a=blobdiff_plain;f=src%2Fsrc%2Fdcc.c;h=fcdc5a89725143587756b30aba5a3a400ea2d255;hp=6de5102d07d2cd7fac62974d2009d97629e965fa;hb=863bd541063e72fcea7305b9d3ee2cb460a6d3d1;hpb=6f0c431a792c79870266913600a71f3be21ee620 diff --git a/src/src/dcc.c b/src/src/dcc.c index 6de5102d0..fcdc5a897 100644 --- a/src/src/dcc.c +++ b/src/src/dcc.c @@ -1,13 +1,13 @@ -/* $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 - 2015 * Vienna University Computer Center * wbreyha@gmx.net * See the file NOTICE for conditions of use and distribution. + * + * Copyright (c) The Exim Maintainers 2015 - 2016 */ /* This patch is based on code from Tom Kistners exiscan (ACL integration) and @@ -21,7 +21,6 @@ #include "unistd.h" uschar dcc_header_str[256]; -uschar dcc_result_str[256]; int dcc_ok = 0; int dcc_rc = 0; @@ -33,30 +32,32 @@ int flushbuffer (int socket, uschar *buffer) int retval, rsp; rsp = write(socket, buffer, Ustrlen(buffer)); DEBUG(D_acl) - debug_printf("Result of the write() = %d\n", rsp); + debug_printf("DCC: 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: 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: Wrote buffer to socket:\n%s\n", buffer); 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; @@ -70,9 +71,7 @@ int dcc_process(uschar **listptr) { 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; uschar *dcc_acl_options; @@ -81,50 +80,42 @@ int dcc_process(uschar **listptr) { /* grep 1st option */ if ((dcc_acl_options = string_nextinlist(&list, &sep, - dcc_acl_options_buffer, - sizeof(dcc_acl_options_buffer))) != NULL) - { + dcc_acl_options_buffer, sizeof(dcc_acl_options_buffer)))) + { /* 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; - }; - } - else { - /* empty means "don't match anything" */ - return FAIL; - }; + if ( strcmpic(dcc_acl_options, US"false") == 0 + || Ustrcmp(dcc_acl_options, "0") == 0 + ) + return FAIL; /* explicitly no matching */ + } + 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 (i = 0; i < 2; i++) + { + message_subdir[0] = split_spool_directory == (i == 0) ? message_id[5] : 0; + + 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"); return DEFER; - }; + } /* Initialize the variables */ @@ -144,24 +135,26 @@ int dcc_process(uschar **listptr) { /* opts 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); - } + Ustrncpy(opts, dccifd_options, sizeof(opts)-1); + /* 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); + } + 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); } - 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); @@ -175,7 +168,7 @@ int dcc_process(uschar **listptr) { retval = DEFER; bzero(sendbuf,sizeof(sendbuf)); - bzero(xhdr,sizeof(xhdr)); + bzero(dcc_header_str,sizeof(dcc_header_str)); bzero(rcpt,sizeof(rcpt)); bzero(from,sizeof(from)); @@ -190,7 +183,7 @@ int dcc_process(uschar **listptr) { * Now creating the socket connection * **************************************/ - /* If there is a dcc_daemon_ip, we use a tcp socket, otherwise a UNIX socket */ + /* If sockip contains an 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)); @@ -199,8 +192,8 @@ int dcc_process(uschar **listptr) { serv_addr_in.sin_port = htons(portnr); 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; @@ -208,21 +201,21 @@ int dcc_process(uschar **listptr) { /* Now connecting the socket (INET) */ 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 { /* 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); + Ustrncpy(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; @@ -230,8 +223,8 @@ int dcc_process(uschar **listptr) { /* Now connecting the socket (UNIX) */ 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; @@ -239,25 +232,25 @@ int dcc_process(uschar **listptr) { } /* the socket is open, now send the options to dccifd*/ DEBUG(D_acl) - debug_printf("\n---------------------------\nSocket opened; now sending input\n-----------------\n"); + debug_printf("\nDCC: ---------------------------\nDCC: Socket opened; now sending input\nDCC: -----------------\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: opts = %s\nDCC: sender = %s\nDCC: rcpt count = %d\n", opts, from, recipients_count); + debug_printf("DCC: Sending options:\nDCC: ****************************\n"); } /* let's send each of the recipients to dccifd */ for (i = 0; i < recipients_count; i++){ DEBUG(D_acl) - debug_printf("recipient = %s\n",recipients_list[i].address); + debug_printf("DCC: 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); + debug_printf("DCC: Writing buffer: %s\n", sendbuf); flushbuffer(sockfd, sendbuf); bzero(sendbuf, sizeof(sendbuf)); } @@ -268,7 +261,7 @@ int dcc_process(uschar **listptr) { Ustrncat(sendbuf, "\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1); /* Now we send the input buffer */ DEBUG(D_acl) - debug_printf("%s\n****************************\n", sendbuf); + debug_printf("DCC: %s\nDCC: ****************************\n", sendbuf); flushbuffer(sockfd, sendbuf); /* now send the message */ @@ -277,7 +270,7 @@ int dcc_process(uschar **listptr) { /* First send the headers */ /* Now send the headers */ DEBUG(D_acl) - debug_printf("Sending headers:\n****************************\n"); + debug_printf("DCC: Sending headers:\nDCC: ****************************\n"); Ustrncpy(sendbuf, dcchdr->text, sizeof(sendbuf)-2); while((dcchdr=dcchdr->next)) { if(dcchdr->slen > sizeof(sendbuf)-2) { @@ -308,40 +301,40 @@ int dcc_process(uschar **listptr) { Ustrncat(sendbuf, "\n", sizeof(sendbuf)-Ustrlen(sendbuf)-1); flushbuffer(sockfd, sendbuf); DEBUG(D_acl) - debug_printf("\n****************************\n%s", sendbuf); + debug_printf("\nDCC: ****************************\n%s", sendbuf); /* Clear the input buffer */ bzero(sendbuf, sizeof(sendbuf)); /* now send the body */ DEBUG(D_acl) - debug_printf("Writing body:\n****************************\n"); + debug_printf("DCC: Writing body:\nDCC: ****************************\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)); } DEBUG(D_acl) - debug_printf("\n****************************\n"); + debug_printf("\nDCC: ****************************\n"); /* shutdown() the socket */ if(shutdown(sockfd, 1) < 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("\nDCC: -------------------------\nDCC: Input sent.\nDCC: -------------------------\n"); /******************************** * receiving output from dccifd * ********************************/ DEBUG(D_acl) - debug_printf("\n-------------------------------------\nNow receiving output from server\n-----------------------------------\n"); + debug_printf("\nDCC: -------------------------------------\nDCC: Now receiving output from server\nDCC: -----------------------------------\n"); /****************************************************************** * We should get 3 lines: * @@ -355,7 +348,7 @@ int dcc_process(uschar **listptr) { 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] */ + k = 0; /* initializing the index of the X-DCC header: dcc_header_str[k] */ /* Let's read from the socket until there's nothing left to read */ bzero(recvbuf, sizeof(recvbuf)); @@ -363,7 +356,7 @@ int dcc_process(uschar **listptr) { /* How much did we get from the socket */ c = Ustrlen(recvbuf) + 1; 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:\nDCC: ------------\nDCC: %s\nDCC: -----------\n", c, recvbuf); /* Now let's read each character and see what we've got */ for(i = 0; i < c; i++) { @@ -382,14 +375,14 @@ int dcc_process(uschar **listptr) { * return value accordingly */ if(recvbuf[i] == 'A') { DEBUG(D_acl) - debug_printf("Overall result = A\treturning OK\n"); + debug_printf("DCC: 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"); + debug_printf("DCC: Overall result = R\treturning FAIL\n"); dcc_result = US"R"; retval = FAIL; if(sender_host_name) { @@ -402,7 +395,7 @@ int dcc_process(uschar **listptr) { } else if(recvbuf[i] == 'S') { DEBUG(D_acl) - debug_printf("Overall result = S\treturning OK\n"); + debug_printf("DCC: 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 */ @@ -411,14 +404,14 @@ int dcc_process(uschar **listptr) { } else if(recvbuf[i] == 'G') { DEBUG(D_acl) - debug_printf("Overall result = G\treturning FAIL\n"); + debug_printf("DCC: 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"); + debug_printf("DCC: 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"); @@ -426,7 +419,7 @@ int dcc_process(uschar **listptr) { } else { DEBUG(D_acl) - debug_printf("Overall result = something else\treturning DEFER\n"); + debug_printf("DCC: 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"); @@ -434,36 +427,36 @@ int dcc_process(uschar **listptr) { } } 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 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); } } 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]; + /* The third and following lines are the X-DCC header, + * so we store it in dcc_header_str. */ + /* check if we don't get more than we can handle */ + if(k < sizeof(dcc_header_str)) { + dcc_header_str[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"); + DEBUG(D_acl) debug_printf("DCC: 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); + debug_printf("DCC: Wrong line number in output. Line number is %d\n", line); } } } @@ -472,26 +465,26 @@ int dcc_process(uschar **listptr) { } /* 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 need to terminate the X-DCC header with a '\n' character. This needs to be k-1 + * since dcc_header_str[k] contains '\0'. */ + dcc_header_str[k-1] = '\n'; /* 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\nDCC: X-DCC header: %sReturn message: %s\nDCC: dcc_result: %s\n", retval, dcc_header_str, 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, "X-DCC", 5))){ + dcc_header = dcc_header_str; if(dcc_direct_add_header) { - header_add(' ' , "%s", xhdr); + header_add(' ' , "%s", dcc_header_str); /* 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); } /* check if we should add additional headers passed in acl_m_dcc_add_header */ @@ -502,14 +495,14 @@ int dcc_process(uschar **listptr) { Ustrcat(dcc_xtra_hdrs, "\n"); header_add(' ', "%s", 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); } } 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\nDCC: dcc_result = %s\n", dcc_return_text, retval, dcc_result); (void)fclose(data_file); dcc_rc = retval;