/* * Sample management functions. * * Copyright 2009-2010 EXCELIANCE, Emeric Brun * Copyright (C) 2012 Willy Tarreau * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* sample type names */ const char *smp_to_type[SMP_TYPES] = { [SMP_T_ANY] = "any", [SMP_T_BOOL] = "bool", [SMP_T_SINT] = "sint", [SMP_T_ADDR] = "addr", [SMP_T_IPV4] = "ipv4", [SMP_T_IPV6] = "ipv6", [SMP_T_STR] = "str", [SMP_T_BIN] = "bin", [SMP_T_METH] = "meth", }; /* static sample used in sample_process() when

is NULL */ static THREAD_LOCAL struct sample temp_smp; /* list head of all known sample fetch keywords */ static struct sample_fetch_kw_list sample_fetches = { .list = LIST_HEAD_INIT(sample_fetches.list) }; /* list head of all known sample format conversion keywords */ static struct sample_conv_kw_list sample_convs = { .list = LIST_HEAD_INIT(sample_convs.list) }; const unsigned int fetch_cap[SMP_SRC_ENTRIES] = { [SMP_SRC_CONST] = (SMP_VAL_FE_CON_ACC | SMP_VAL_FE_SES_ACC | SMP_VAL_FE_REQ_CNT | SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK | SMP_VAL_BE_REQ_CNT | SMP_VAL_BE_HRQ_HDR | SMP_VAL_BE_HRQ_BDY | SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END | SMP_VAL_BE_CHK_RUL | SMP_VAL_CFG_PARSER | SMP_VAL_CLI_PARSER ), [SMP_SRC_INTRN] = (SMP_VAL_FE_CON_ACC | SMP_VAL_FE_SES_ACC | SMP_VAL_FE_REQ_CNT | SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK | SMP_VAL_BE_REQ_CNT | SMP_VAL_BE_HRQ_HDR | SMP_VAL_BE_HRQ_BDY | SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END | SMP_VAL_BE_CHK_RUL | SMP_VAL___________ | SMP_VAL_CLI_PARSER ), [SMP_SRC_LISTN] = (SMP_VAL_FE_CON_ACC | SMP_VAL_FE_SES_ACC | SMP_VAL_FE_REQ_CNT | SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK | SMP_VAL_BE_REQ_CNT | SMP_VAL_BE_HRQ_HDR | SMP_VAL_BE_HRQ_BDY | SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_FTEND] = (SMP_VAL_FE_CON_ACC | SMP_VAL_FE_SES_ACC | SMP_VAL_FE_REQ_CNT | SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK | SMP_VAL_BE_REQ_CNT | SMP_VAL_BE_HRQ_HDR | SMP_VAL_BE_HRQ_BDY | SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_L4CLI] = (SMP_VAL_FE_CON_ACC | SMP_VAL_FE_SES_ACC | SMP_VAL_FE_REQ_CNT | SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK | SMP_VAL_BE_REQ_CNT | SMP_VAL_BE_HRQ_HDR | SMP_VAL_BE_HRQ_BDY | SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END | SMP_VAL_BE_CHK_RUL | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_L5CLI] = (SMP_VAL___________ | SMP_VAL_FE_SES_ACC | SMP_VAL_FE_REQ_CNT | SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK | SMP_VAL_BE_REQ_CNT | SMP_VAL_BE_HRQ_HDR | SMP_VAL_BE_HRQ_BDY | SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_TRACK] = (SMP_VAL_FE_CON_ACC | SMP_VAL_FE_SES_ACC | SMP_VAL_FE_REQ_CNT | SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK | SMP_VAL_BE_REQ_CNT | SMP_VAL_BE_HRQ_HDR | SMP_VAL_BE_HRQ_BDY | SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_L6REQ] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_FE_REQ_CNT | SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK | SMP_VAL_BE_REQ_CNT | SMP_VAL_BE_HRQ_HDR | SMP_VAL_BE_HRQ_BDY | SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_HRQHV] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_FE_REQ_CNT | SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK | SMP_VAL_BE_REQ_CNT | SMP_VAL_BE_HRQ_HDR | SMP_VAL_BE_HRQ_BDY | SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_HRQHP] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_FE_REQ_CNT | SMP_VAL_FE_HRQ_HDR | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK | SMP_VAL_BE_REQ_CNT | SMP_VAL_BE_HRQ_HDR | SMP_VAL_BE_HRQ_BDY | SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_HRQBO] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_FE_HRQ_BDY | SMP_VAL_FE_SET_BCK | SMP_VAL_BE_REQ_CNT | SMP_VAL_BE_HRQ_HDR | SMP_VAL_BE_HRQ_BDY | SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_BKEND] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_BE_REQ_CNT | SMP_VAL_BE_HRQ_HDR | SMP_VAL_BE_HRQ_BDY | SMP_VAL_BE_SET_SRV | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END | SMP_VAL_BE_CHK_RUL | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_SERVR] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_BE_SRV_CON | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END | SMP_VAL_BE_CHK_RUL | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_L4SRV] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END | SMP_VAL_BE_CHK_RUL | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_L5SRV] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END | SMP_VAL_BE_CHK_RUL | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_L6RES] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL___________ | SMP_VAL_BE_CHK_RUL | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_HRSHV] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL___________ | SMP_VAL_BE_CHK_RUL | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_HRSHP] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_BE_RES_CNT | SMP_VAL_BE_HRS_HDR | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL_FE_LOG_END | SMP_VAL_BE_CHK_RUL | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_HRSBO] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_BE_HRS_BDY | SMP_VAL_BE_STO_RUL | SMP_VAL_FE_RES_CNT | SMP_VAL_FE_HRS_HDR | SMP_VAL_FE_HRS_BDY | SMP_VAL___________ | SMP_VAL_BE_CHK_RUL | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_RQFIN] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_FE_LOG_END | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_RSFIN] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_FE_LOG_END | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_TXFIN] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_FE_LOG_END | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ ), [SMP_SRC_SSFIN] = (SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL_FE_LOG_END | SMP_VAL___________ | SMP_VAL___________ | SMP_VAL___________ ), }; static const char *fetch_src_names[SMP_SRC_ENTRIES] = { [SMP_SRC_INTRN] = "internal state", [SMP_SRC_LISTN] = "listener", [SMP_SRC_FTEND] = "frontend", [SMP_SRC_L4CLI] = "client address", [SMP_SRC_L5CLI] = "client-side connection", [SMP_SRC_TRACK] = "track counters", [SMP_SRC_L6REQ] = "request buffer", [SMP_SRC_HRQHV] = "HTTP request headers", [SMP_SRC_HRQHP] = "HTTP request", [SMP_SRC_HRQBO] = "HTTP request body", [SMP_SRC_BKEND] = "backend", [SMP_SRC_SERVR] = "server", [SMP_SRC_L4SRV] = "server address", [SMP_SRC_L5SRV] = "server-side connection", [SMP_SRC_L6RES] = "response buffer", [SMP_SRC_HRSHV] = "HTTP response headers", [SMP_SRC_HRSHP] = "HTTP response", [SMP_SRC_HRSBO] = "HTTP response body", [SMP_SRC_RQFIN] = "request buffer statistics", [SMP_SRC_RSFIN] = "response buffer statistics", [SMP_SRC_TXFIN] = "transaction statistics", [SMP_SRC_SSFIN] = "session statistics", }; static const char *fetch_ckp_names[SMP_CKP_ENTRIES] = { [SMP_CKP_FE_CON_ACC] = "frontend tcp-request connection rule", [SMP_CKP_FE_SES_ACC] = "frontend tcp-request session rule", [SMP_CKP_FE_REQ_CNT] = "frontend tcp-request content rule", [SMP_CKP_FE_HRQ_HDR] = "frontend http-request header rule", [SMP_CKP_FE_HRQ_BDY] = "frontend http-request body rule", [SMP_CKP_FE_SET_BCK] = "frontend use-backend rule", [SMP_CKP_BE_REQ_CNT] = "backend tcp-request content rule", [SMP_CKP_BE_HRQ_HDR] = "backend http-request header rule", [SMP_CKP_BE_HRQ_BDY] = "backend http-request body rule", [SMP_CKP_BE_SET_SRV] = "backend use-server, balance or stick-match rule", [SMP_CKP_BE_SRV_CON] = "server source selection", [SMP_CKP_BE_RES_CNT] = "backend tcp-response content rule", [SMP_CKP_BE_HRS_HDR] = "backend http-response header rule", [SMP_CKP_BE_HRS_BDY] = "backend http-response body rule", [SMP_CKP_BE_STO_RUL] = "backend stick-store rule", [SMP_CKP_FE_RES_CNT] = "frontend tcp-response content rule", [SMP_CKP_FE_HRS_HDR] = "frontend http-response header rule", [SMP_CKP_FE_HRS_BDY] = "frontend http-response body rule", [SMP_CKP_FE_LOG_END] = "logs", [SMP_CKP_BE_CHK_RUL] = "backend tcp-check rule", [SMP_CKP_CFG_PARSER] = "configuration parser", [SMP_CKP_CLI_PARSER] = "CLI parser", }; /* This function returns the type of the data returned by the sample_expr. * It assumes that the and all of its converters are properly * initialized. */ inline int smp_expr_output_type(struct sample_expr *expr) { struct sample_conv_expr *smp_expr; if (!LIST_ISEMPTY(&expr->conv_exprs)) { smp_expr = LIST_PREV(&expr->conv_exprs, struct sample_conv_expr *, list); return smp_expr->conv->out_type; } return expr->fetch->out_type; } /* fill the trash with a comma-delimited list of source names for the bit * field which must be composed of a non-null set of SMP_USE_* flags. The return * value is the pointer to the string in the trash buffer. */ const char *sample_src_names(unsigned int use) { int bit; trash.data = 0; trash.area[0] = '\0'; for (bit = 0; bit < SMP_SRC_ENTRIES; bit++) { if (!(use & ~((1 << bit) - 1))) break; /* no more bits */ if (!(use & (1 << bit))) continue; /* bit not set */ trash.data += snprintf(trash.area + trash.data, trash.size - trash.data, "%s%s", (use & ((1 << bit) - 1)) ? "," : "", fetch_src_names[bit]); } return trash.area; } /* return a pointer to the correct sample checkpoint name, or "unknown" when * the flags are invalid. Only the lowest bit is used, higher bits are ignored * if set. */ const char *sample_ckp_names(unsigned int use) { int bit; for (bit = 0; bit < SMP_CKP_ENTRIES; bit++) if (use & (1 << bit)) return fetch_ckp_names[bit]; return "unknown sample check place, please report this bug"; } /* * Registers the sample fetch keyword list as a list of valid keywords * for next parsing sessions. The fetch keywords capabilities are also computed * from their ->use field. */ void sample_register_fetches(struct sample_fetch_kw_list *kwl) { struct sample_fetch *sf; int bit; for (sf = kwl->kw; sf->kw != NULL; sf++) { for (bit = 0; bit < SMP_SRC_ENTRIES; bit++) if (sf->use & (1 << bit)) sf->val |= fetch_cap[bit]; } LIST_APPEND(&sample_fetches.list, &kwl->list); } /* * Registers the sample format coverstion keyword list as a list of valid keywords for next * parsing sessions. */ void sample_register_convs(struct sample_conv_kw_list *pckl) { LIST_APPEND(&sample_convs.list, &pckl->list); } /* * Returns the pointer on sample fetch keyword structure identified by * string of in buffer . * */ struct sample_fetch *find_sample_fetch(const char *kw, int len) { int index; struct sample_fetch_kw_list *kwl; list_for_each_entry(kwl, &sample_fetches.list, list) { for (index = 0; kwl->kw[index].kw != NULL; index++) { if (strncmp(kwl->kw[index].kw, kw, len) == 0 && kwl->kw[index].kw[len] == '\0') return &kwl->kw[index]; } } return NULL; } /* dump list of registered sample fetch keywords on stdout */ void smp_dump_fetch_kw(void) { struct sample_fetch_kw_list *kwl; struct sample_fetch *kwp, *kw; uint64_t mask; int index; int arg; int bit; for (bit = 0; bit <= SMP_CKP_ENTRIES + 1; bit++) { putchar('#'); for (index = 0; bit + index <= SMP_CKP_ENTRIES; index++) putchar(' '); for (index = 0; index < bit && index < SMP_CKP_ENTRIES; index++) printf((bit <= SMP_CKP_ENTRIES) ? "/ " : " |"); for (index = bit; bit < SMP_CKP_ENTRIES && index < SMP_CKP_ENTRIES + 2; index++) if (index == bit) putchar('_'); else if (index == bit + 1) putchar('.'); else putchar('-'); printf(" %s\n", (bit < SMP_CKP_ENTRIES) ? fetch_ckp_names[bit] : ""); } for (kw = kwp = NULL;; kwp = kw) { list_for_each_entry(kwl, &sample_fetches.list, list) { for (index = 0; kwl->kw[index].kw != NULL; index++) { if (strordered(kwp ? kwp->kw : NULL, kwl->kw[index].kw, kw != kwp ? kw->kw : NULL)) kw = &kwl->kw[index]; } } if (kw == kwp) break; printf("[ "); for (bit = 0; bit < SMP_CKP_ENTRIES; bit++) printf("%s", (kw->val & (1 << bit)) ? "Y " : ". "); printf("] %s", kw->kw); if (kw->arg_mask) { mask = kw->arg_mask >> ARGM_BITS; printf("("); for (arg = 0; arg < ARGM_NBARGS && ((mask >> (arg * ARGT_BITS)) & ARGT_MASK); arg++) { if (arg == (kw->arg_mask & ARGM_MASK)) { /* now dumping extra args */ printf("["); } if (arg) printf(","); printf("%s", arg_type_names[(mask >> (arg * ARGT_BITS)) & ARGT_MASK]); } if (arg > (kw->arg_mask & ARGM_MASK)) { /* extra args were dumped */ printf("]"); } printf(")"); } printf(": %s", smp_to_type[kw->out_type]); printf("\n"); } } /* dump list of registered sample converter keywords on stdout */ void smp_dump_conv_kw(void) { struct sample_conv_kw_list *kwl; struct sample_conv *kwp, *kw; uint64_t mask; int index; int arg; for (kw = kwp = NULL;; kwp = kw) { list_for_each_entry(kwl, &sample_convs.list, list) { for (index = 0; kwl->kw[index].kw != NULL; index++) { if (strordered(kwp ? kwp->kw : NULL, kwl->kw[index].kw, kw != kwp ? kw->kw : NULL)) kw = &kwl->kw[index]; } } if (kw == kwp) break; printf("%s", kw->kw); if (kw->arg_mask) { mask = kw->arg_mask >> ARGM_BITS; printf("("); for (arg = 0; arg < ARGM_NBARGS && ((mask >> (arg * ARGT_BITS)) & ARGT_MASK); arg++) { if (arg == (kw->arg_mask & ARGM_MASK)) { /* now dumping extra args */ printf("["); } if (arg) printf(","); printf("%s", arg_type_names[(mask >> (arg * ARGT_BITS)) & ARGT_MASK]); } if (arg > (kw->arg_mask & ARGM_MASK)) { /* extra args were dumped */ printf("]"); } printf(")"); } printf(": %s => %s", smp_to_type[kw->out_type], smp_to_type[kw->in_type]); printf("\n"); } } /* This function browses the list of available sample fetches. is * the last used sample fetch. If it is the first call, it must set to NULL. * is the index of the next sample fetch entry. It is used as private * value. It is useless to initiate it. * * It returns always the new fetch_sample entry, and NULL when the end of * the list is reached. */ struct sample_fetch *sample_fetch_getnext(struct sample_fetch *current, int *idx) { struct sample_fetch_kw_list *kwl; struct sample_fetch *base; if (!current) { /* Get first kwl entry. */ kwl = LIST_NEXT(&sample_fetches.list, struct sample_fetch_kw_list *, list); (*idx) = 0; } else { /* Get kwl corresponding to the curret entry. */ base = current + 1 - (*idx); kwl = container_of(base, struct sample_fetch_kw_list, kw); } while (1) { /* Check if kwl is the last entry. */ if (&kwl->list == &sample_fetches.list) return NULL; /* idx contain the next keyword. If it is available, return it. */ if (kwl->kw[*idx].kw) { (*idx)++; return &kwl->kw[(*idx)-1]; } /* get next entry in the main list, and return NULL if the end is reached. */ kwl = LIST_NEXT(&kwl->list, struct sample_fetch_kw_list *, list); /* Set index to 0, ans do one other loop. */ (*idx) = 0; } } /* This function browses the list of available converters. is * the last used converter. If it is the first call, it must set to NULL. * is the index of the next converter entry. It is used as private * value. It is useless to initiate it. * * It returns always the next sample_conv entry, and NULL when the end of * the list is reached. */ struct sample_conv *sample_conv_getnext(struct sample_conv *current, int *idx) { struct sample_conv_kw_list *kwl; struct sample_conv *base; if (!current) { /* Get first kwl entry. */ kwl = LIST_NEXT(&sample_convs.list, struct sample_conv_kw_list *, list); (*idx) = 0; } else { /* Get kwl corresponding to the curret entry. */ base = current + 1 - (*idx); kwl = container_of(base, struct sample_conv_kw_list, kw); } while (1) { /* Check if kwl is the last entry. */ if (&kwl->list == &sample_convs.list) return NULL; /* idx contain the next keyword. If it is available, return it. */ if (kwl->kw[*idx].kw) { (*idx)++; return &kwl->kw[(*idx)-1]; } /* get next entry in the main list, and return NULL if the end is reached. */ kwl = LIST_NEXT(&kwl->list, struct sample_conv_kw_list *, list); /* Set index to 0, ans do one other loop. */ (*idx) = 0; } } /* * Returns the pointer on sample format conversion keyword structure identified by * string of in buffer . * */ struct sample_conv *find_sample_conv(const char *kw, int len) { int index; struct sample_conv_kw_list *kwl; list_for_each_entry(kwl, &sample_convs.list, list) { for (index = 0; kwl->kw[index].kw != NULL; index++) { if (strncmp(kwl->kw[index].kw, kw, len) == 0 && kwl->kw[index].kw[len] == '\0') return &kwl->kw[index]; } } return NULL; } /******************************************************************/ /* Sample casts functions */ /******************************************************************/ static int c_ip2int(struct sample *smp) { smp->data.u.sint = ntohl(smp->data.u.ipv4.s_addr); smp->data.type = SMP_T_SINT; return 1; } static int c_ip2str(struct sample *smp) { struct buffer *trash = get_trash_chunk(); if (!inet_ntop(AF_INET, (void *)&smp->data.u.ipv4, trash->area, trash->size)) return 0; trash->data = strlen(trash->area); smp->data.u.str = *trash; smp->data.type = SMP_T_STR; smp->flags &= ~SMP_F_CONST; return 1; } static int c_ip2ipv6(struct sample *smp) { v4tov6(&smp->data.u.ipv6, &smp->data.u.ipv4); smp->data.type = SMP_T_IPV6; return 1; } static int c_ipv62ip(struct sample *smp) { if (!v6tov4(&smp->data.u.ipv4, &smp->data.u.ipv6)) return 0; smp->data.type = SMP_T_IPV4; return 1; } static int c_ipv62str(struct sample *smp) { struct buffer *trash = get_trash_chunk(); if (!inet_ntop(AF_INET6, (void *)&smp->data.u.ipv6, trash->area, trash->size)) return 0; trash->data = strlen(trash->area); smp->data.u.str = *trash; smp->data.type = SMP_T_STR; smp->flags &= ~SMP_F_CONST; return 1; } /* static int c_ipv62ip(struct sample *smp) { return v6tov4(&smp->data.u.ipv4, &smp->data.u.ipv6); } */ static int c_int2ip(struct sample *smp) { smp->data.u.ipv4.s_addr = htonl((unsigned int)smp->data.u.sint); smp->data.type = SMP_T_IPV4; return 1; } static int c_int2ipv6(struct sample *smp) { smp->data.u.ipv4.s_addr = htonl((unsigned int)smp->data.u.sint); v4tov6(&smp->data.u.ipv6, &smp->data.u.ipv4); smp->data.type = SMP_T_IPV6; return 1; } static int c_str2addr(struct sample *smp) { if (!buf2ip(smp->data.u.str.area, smp->data.u.str.data, &smp->data.u.ipv4)) { if (!buf2ip6(smp->data.u.str.area, smp->data.u.str.data, &smp->data.u.ipv6)) return 0; smp->data.type = SMP_T_IPV6; smp->flags &= ~SMP_F_CONST; return 1; } smp->data.type = SMP_T_IPV4; smp->flags &= ~SMP_F_CONST; return 1; } static int c_str2ip(struct sample *smp) { if (!buf2ip(smp->data.u.str.area, smp->data.u.str.data, &smp->data.u.ipv4)) return 0; smp->data.type = SMP_T_IPV4; smp->flags &= ~SMP_F_CONST; return 1; } static int c_str2ipv6(struct sample *smp) { if (!buf2ip6(smp->data.u.str.area, smp->data.u.str.data, &smp->data.u.ipv6)) return 0; smp->data.type = SMP_T_IPV6; smp->flags &= ~SMP_F_CONST; return 1; } /* * The NULL char always enforces the end of string if it is met. * Data is never changed, so we can ignore the CONST case */ static int c_bin2str(struct sample *smp) { int i; for (i = 0; i < smp->data.u.str.data; i++) { if (!smp->data.u.str.area[i]) { smp->data.u.str.data = i; break; } } smp->data.type = SMP_T_STR; return 1; } static int c_int2str(struct sample *smp) { struct buffer *trash = get_trash_chunk(); char *pos; pos = lltoa_r(smp->data.u.sint, trash->area, trash->size); if (!pos) return 0; trash->size = trash->size - (pos - trash->area); trash->area = pos; trash->data = strlen(pos); smp->data.u.str = *trash; smp->data.type = SMP_T_STR; smp->flags &= ~SMP_F_CONST; return 1; } /* This function unconditionally duplicates data and removes the "const" flag. * For strings and binary blocks, it also provides a known allocated size with * a length that is capped to the size, and ensures a trailing zero is always * appended for strings. This is necessary for some operations which may * require to extend the length. It returns 0 if it fails, 1 on success. */ int smp_dup(struct sample *smp) { struct buffer *trash; switch (smp->data.type) { case SMP_T_BOOL: case SMP_T_SINT: case SMP_T_ADDR: case SMP_T_IPV4: case SMP_T_IPV6: /* These type are not const. */ break; case SMP_T_METH: if (smp->data.u.meth.meth != HTTP_METH_OTHER) break; /* Fall through */ case SMP_T_STR: trash = get_trash_chunk(); trash->data = smp->data.type == SMP_T_STR ? smp->data.u.str.data : smp->data.u.meth.str.data; if (trash->data > trash->size - 1) trash->data = trash->size - 1; memcpy(trash->area, smp->data.type == SMP_T_STR ? smp->data.u.str.area : smp->data.u.meth.str.area, trash->data); trash->area[trash->data] = 0; smp->data.u.str = *trash; break; case SMP_T_BIN: trash = get_trash_chunk(); trash->data = smp->data.u.str.data; if (trash->data > trash->size) trash->data = trash->size; memcpy(trash->area, smp->data.u.str.area, trash->data); smp->data.u.str = *trash; break; default: /* Other cases are unexpected. */ return 0; } /* remove const flag */ smp->flags &= ~SMP_F_CONST; return 1; } int c_none(struct sample *smp) { return 1; } static int c_str2int(struct sample *smp) { const char *str; const char *end; if (smp->data.u.str.data == 0) return 0; str = smp->data.u.str.area; end = smp->data.u.str.area + smp->data.u.str.data; smp->data.u.sint = read_int64(&str, end); smp->data.type = SMP_T_SINT; smp->flags &= ~SMP_F_CONST; return 1; } static int c_str2meth(struct sample *smp) { enum http_meth_t meth; int len; meth = find_http_meth(smp->data.u.str.area, smp->data.u.str.data); if (meth == HTTP_METH_OTHER) { len = smp->data.u.str.data; smp->data.u.meth.str.area = smp->data.u.str.area; smp->data.u.meth.str.data = len; } else smp->flags &= ~SMP_F_CONST; smp->data.u.meth.meth = meth; smp->data.type = SMP_T_METH; return 1; } static int c_meth2str(struct sample *smp) { int len; enum http_meth_t meth; if (smp->data.u.meth.meth == HTTP_METH_OTHER) { /* The method is unknown. Copy the original pointer. */ len = smp->data.u.meth.str.data; smp->data.u.str.area = smp->data.u.meth.str.area; smp->data.u.str.data = len; smp->data.type = SMP_T_STR; } else if (smp->data.u.meth.meth < HTTP_METH_OTHER) { /* The method is known, copy the pointer containing the string. */ meth = smp->data.u.meth.meth; smp->data.u.str.area = http_known_methods[meth].ptr; smp->data.u.str.data = http_known_methods[meth].len; smp->flags |= SMP_F_CONST; smp->data.type = SMP_T_STR; } else { /* Unknown method */ return 0; } return 1; } static int c_addr2bin(struct sample *smp) { struct buffer *chk = get_trash_chunk(); if (smp->data.type == SMP_T_IPV4) { chk->data = 4; memcpy(chk->area, &smp->data.u.ipv4, chk->data); } else if (smp->data.type == SMP_T_IPV6) { chk->data = 16; memcpy(chk->area, &smp->data.u.ipv6, chk->data); } else return 0; smp->data.u.str = *chk; smp->data.type = SMP_T_BIN; return 1; } static int c_int2bin(struct sample *smp) { struct buffer *chk = get_trash_chunk(); *(unsigned long long int *) chk->area = my_htonll(smp->data.u.sint); chk->data = 8; smp->data.u.str = *chk; smp->data.type = SMP_T_BIN; return 1; } static int c_bool2bin(struct sample *smp) { struct buffer *chk = get_trash_chunk(); *(unsigned long long int *)chk->area = my_htonll(!!smp->data.u.sint); chk->data = 8; smp->data.u.str = *chk; smp->data.type = SMP_T_BIN; return 1; } /*****************************************************************/ /* Sample casts matrix: */ /* sample_casts[from type][to type] */ /* NULL pointer used for impossible sample casts */ /*****************************************************************/ sample_cast_fct sample_casts[SMP_TYPES][SMP_TYPES] = { /* to: ANY BOOL SINT ADDR IPV4 IPV6 STR BIN METH */ /* from: ANY */ { c_none, c_none, c_none, c_none, c_none, c_none, c_none, c_none, c_none, }, /* BOOL */ { c_none, c_none, c_none, NULL, NULL, NULL, c_int2str, c_bool2bin, NULL, }, /* SINT */ { c_none, c_none, c_none, c_int2ip, c_int2ip, c_int2ipv6, c_int2str, c_int2bin, NULL, }, /* ADDR */ { c_none, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, }, /* IPV4 */ { c_none, NULL, c_ip2int, c_none, c_none, c_ip2ipv6, c_ip2str, c_addr2bin, NULL, }, /* IPV6 */ { c_none, NULL, NULL, c_none, c_ipv62ip,c_none, c_ipv62str, c_addr2bin, NULL, }, /* STR */ { c_none, c_str2int, c_str2int, c_str2addr, c_str2ip, c_str2ipv6, c_none, c_none, c_str2meth, }, /* BIN */ { c_none, NULL, NULL, NULL, NULL, NULL, c_bin2str, c_none, c_str2meth, }, /* METH */ { c_none, NULL, NULL, NULL, NULL, NULL, c_meth2str, c_meth2str, c_none, } }; /* * Parse a sample expression configuration: * fetch keyword followed by format conversion keywords. * Returns a pointer on allocated sample expression structure. * is an arg_list serving as a list head to report missing dependencies. * It may be NULL if such dependencies are not allowed. Otherwise, the caller * must have set al->ctx if al is set. * If is non-nul, it will be set to the first unparsed character * (which may be the final '\0') on success. If it is nul, the expression * must be properly terminated by a '\0' otherwise an error is reported. */ struct sample_expr *sample_parse_expr(char **str, int *idx, const char *file, int line, char **err_msg, struct arg_list *al, char **endptr) { const char *begw; /* beginning of word */ const char *endw; /* end of word */ const char *endt; /* end of term */ struct sample_expr *expr = NULL; struct sample_fetch *fetch; struct sample_conv *conv; unsigned long prev_type; char *fkw = NULL; char *ckw = NULL; int err_arg; begw = str[*idx]; for (endw = begw; is_idchar(*endw); endw++) ; if (endw == begw) { memprintf(err_msg, "missing fetch method"); goto out_error; } /* keep a copy of the current fetch keyword for error reporting */ fkw = my_strndup(begw, endw - begw); fetch = find_sample_fetch(begw, endw - begw); if (!fetch) { memprintf(err_msg, "unknown fetch method '%s'", fkw); goto out_error; } /* At this point, we have : * - begw : beginning of the keyword * - endw : end of the keyword, first character not part of keyword */ if (fetch->out_type >= SMP_TYPES) { memprintf(err_msg, "returns type of fetch method '%s' is unknown", fkw); goto out_error; } prev_type = fetch->out_type; expr = calloc(1, sizeof(*expr)); if (!expr) goto out_error; LIST_INIT(&(expr->conv_exprs)); expr->fetch = fetch; expr->arg_p = empty_arg_list; /* Note that we call the argument parser even with an empty string, * this allows it to automatically create entries for mandatory * implicit arguments (eg: local proxy name). */ if (al) { al->kw = expr->fetch->kw; al->conv = NULL; } if (make_arg_list(endw, -1, fetch->arg_mask, &expr->arg_p, err_msg, &endt, &err_arg, al) < 0) { memprintf(err_msg, "fetch method '%s' : %s", fkw, *err_msg); goto out_error; } /* now endt is our first char not part of the arg list, typically the * comma after the sample fetch name or after the closing parenthesis, * or the NUL char. */ if (!expr->arg_p) { expr->arg_p = empty_arg_list; } else if (fetch->val_args && !fetch->val_args(expr->arg_p, err_msg)) { memprintf(err_msg, "invalid args in fetch method '%s' : %s", fkw, *err_msg); goto out_error; } /* Now process the converters if any. We have two supported syntaxes * for the converters, which can be combined : * - comma-delimited list of converters just after the keyword and args ; * - one converter per keyword * The combination allows to have each keyword being a comma-delimited * series of converters. * * We want to process the former first, then the latter. For this we start * from the beginning of the supposed place in the exiting conv chain, which * starts at the last comma (endt). */ while (1) { struct sample_conv_expr *conv_expr; int err_arg; int argcnt; if (*endt && *endt != ',') { if (endptr) { /* end found, let's stop here */ break; } if (ckw) memprintf(err_msg, "missing comma after converter '%s'", ckw); else memprintf(err_msg, "missing comma after fetch keyword '%s'", fkw); goto out_error; } /* FIXME: how long should we support such idiocies ? Maybe we * should already warn ? */ while (*endt == ',') /* then trailing commas */ endt++; begw = endt; /* start of converter */ if (!*begw) { /* none ? skip to next string */ (*idx)++; begw = str[*idx]; if (!begw || !*begw) break; } for (endw = begw; is_idchar(*endw); endw++) ; free(ckw); ckw = my_strndup(begw, endw - begw); conv = find_sample_conv(begw, endw - begw); if (!conv) { /* we found an isolated keyword that we don't know, it's not ours */ if (begw == str[*idx]) { endt = begw; break; } memprintf(err_msg, "unknown converter '%s'", ckw); goto out_error; } if (conv->in_type >= SMP_TYPES || conv->out_type >= SMP_TYPES) { memprintf(err_msg, "returns type of converter '%s' is unknown", ckw); goto out_error; } /* If impossible type conversion */ if (!sample_casts[prev_type][conv->in_type]) { memprintf(err_msg, "converter '%s' cannot be applied", ckw); goto out_error; } prev_type = conv->out_type; conv_expr = calloc(1, sizeof(*conv_expr)); if (!conv_expr) goto out_error; LIST_APPEND(&(expr->conv_exprs), &(conv_expr->list)); conv_expr->conv = conv; if (al) { al->kw = expr->fetch->kw; al->conv = conv_expr->conv->kw; } argcnt = make_arg_list(endw, -1, conv->arg_mask, &conv_expr->arg_p, err_msg, &endt, &err_arg, al); if (argcnt < 0) { memprintf(err_msg, "invalid arg %d in converter '%s' : %s", err_arg+1, ckw, *err_msg); goto out_error; } if (argcnt && !conv->arg_mask) { memprintf(err_msg, "converter '%s' does not support any args", ckw); goto out_error; } if (!conv_expr->arg_p) conv_expr->arg_p = empty_arg_list; if (conv->val_args && !conv->val_args(conv_expr->arg_p, conv, file, line, err_msg)) { memprintf(err_msg, "invalid args in converter '%s' : %s", ckw, *err_msg); goto out_error; } } if (endptr) { /* end found, let's stop here */ *endptr = (char *)endt; } out: free(fkw); free(ckw); return expr; out_error: release_sample_expr(expr); expr = NULL; goto out; } /* * Process a fetch + format conversion of defined by the sample expression * on request or response considering the parameter. * Returns a pointer on a typed sample structure containing the result or NULL if * sample is not found or when format conversion failed. * If

is not null, function returns results in structure pointed by

. * If

is null, functions returns a pointer on a static sample structure. * * Note: the fetch functions are required to properly set the return type. The * conversion functions must do so too. However the cast functions do not need * to since they're made to cast multiple types according to what is required. * * The caller may indicate in if it considers the result final or not. * The caller needs to check the SMP_F_MAY_CHANGE flag in p->flags to verify * if the result is stable or not, according to the following table : * * return MAY_CHANGE FINAL Meaning for the sample * NULL 0 * Not present and will never be (eg: header) * NULL 1 0 Not present yet, could change (eg: POST param) * NULL 1 1 Not present yet, will not change anymore * smp 0 * Present and will not change (eg: header) * smp 1 0 Present, may change (eg: request length) * smp 1 1 Present, last known value (eg: request length) */ struct sample *sample_process(struct proxy *px, struct session *sess, struct stream *strm, unsigned int opt, struct sample_expr *expr, struct sample *p) { struct sample_conv_expr *conv_expr; if (p == NULL) { p = &temp_smp; memset(p, 0, sizeof(*p)); } smp_set_owner(p, px, sess, strm, opt); if (!expr->fetch->process(expr->arg_p, p, expr->fetch->kw, expr->fetch->private)) return NULL; list_for_each_entry(conv_expr, &expr->conv_exprs, list) { /* we want to ensure that p->type can be casted into * conv_expr->conv->in_type. We have 3 possibilities : * - NULL => not castable. * - c_none => nothing to do (let's optimize it) * - other => apply cast and prepare to fail */ if (!sample_casts[p->data.type][conv_expr->conv->in_type]) return NULL; if (sample_casts[p->data.type][conv_expr->conv->in_type] != c_none && !sample_casts[p->data.type][conv_expr->conv->in_type](p)) return NULL; /* OK cast succeeded */ if (!conv_expr->conv->process(conv_expr->arg_p, p, conv_expr->conv->private)) return NULL; } return p; } /* * Resolve all remaining arguments in proxy

. Returns the number of * errors or 0 if everything is fine. If at least one error is met, it will * be appended to *err. If *err==NULL it will be allocated first. */ int smp_resolve_args(struct proxy *p, char **err) { struct arg_list *cur, *bak; const char *ctx, *where; const char *conv_ctx, *conv_pre, *conv_pos; struct userlist *ul; struct my_regex *reg; struct arg *arg; int cfgerr = 0; int rflags; list_for_each_entry_safe(cur, bak, &p->conf.args.list, list) { struct proxy *px; struct server *srv; struct stktable *t; char *pname, *sname, *stktname; char *err2; arg = cur->arg; /* prepare output messages */ conv_pre = conv_pos = conv_ctx = ""; if (cur->conv) { conv_ctx = cur->conv; conv_pre = "conversion keyword '"; conv_pos = "' for "; } where = "in"; ctx = "sample fetch keyword"; switch (cur->ctx) { case ARGC_STK: where = "in stick rule in"; break; case ARGC_TRK: where = "in tracking rule in"; break; case ARGC_LOG: where = "in log-format string in"; break; case ARGC_LOGSD: where = "in log-format-sd string in"; break; case ARGC_HRQ: where = "in http-request expression in"; break; case ARGC_HRS: where = "in http-response response in"; break; case ARGC_UIF: where = "in unique-id-format string in"; break; case ARGC_RDR: where = "in redirect format string in"; break; case ARGC_CAP: where = "in capture rule in"; break; case ARGC_ACL: ctx = "ACL keyword"; break; case ARGC_SRV: where = "in server directive in"; break; case ARGC_SPOE: where = "in spoe-message directive in"; break; case ARGC_UBK: where = "in use_backend expression in"; break; case ARGC_USRV: where = "in use-server or balance expression in"; break; case ARGC_HERR: where = "in http-error directive in"; break; case ARGC_OT: where = "in ot-scope directive in"; break; case ARGC_TCO: where = "in tcp-request connection expression in"; break; case ARGC_TSE: where = "in tcp-request session expression in"; break; case ARGC_TRQ: where = "in tcp-request content expression in"; break; case ARGC_TRS: where = "in tcp-response content expression in"; break; case ARGC_TCK: where = "in tcp-check expression in"; break; case ARGC_CFG: where = "in configuration expression in"; break; case ARGC_CLI: where = "in CLI expression in"; break; } /* set a few default settings */ px = p; pname = p->id; switch (arg->type) { case ARGT_SRV: if (!arg->data.str.data) { memprintf(err, "%sparsing [%s:%d]: missing server name in arg %d of %s%s%s%s '%s' %s proxy '%s'.\n", *err ? *err : "", cur->file, cur->line, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id); cfgerr++; continue; } /* we support two formats : "bck/srv" and "srv" */ sname = strrchr(arg->data.str.area, '/'); if (sname) { *sname++ = '\0'; pname = arg->data.str.area; px = proxy_be_by_name(pname); if (!px) { memprintf(err, "%sparsing [%s:%d]: unable to find proxy '%s' referenced in arg %d of %s%s%s%s '%s' %s proxy '%s'.\n", *err ? *err : "", cur->file, cur->line, pname, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id); cfgerr++; break; } } else { if (px->cap & PR_CAP_DEF) { memprintf(err, "%sparsing [%s:%d]: backend name must be set in arg %d of %s%s%s%s '%s' %s proxy '%s'.\n", *err ? *err : "", cur->file, cur->line, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id); cfgerr++; break; } sname = arg->data.str.area; } srv = findserver(px, sname); if (!srv) { memprintf(err, "%sparsing [%s:%d]: unable to find server '%s' in proxy '%s', referenced in arg %d of %s%s%s%s '%s' %s proxy '%s'.\n", *err ? *err : "", cur->file, cur->line, sname, pname, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id); cfgerr++; break; } srv->flags |= SRV_F_NON_PURGEABLE; chunk_destroy(&arg->data.str); arg->unresolved = 0; arg->data.srv = srv; break; case ARGT_FE: if (arg->data.str.data) { pname = arg->data.str.area; px = proxy_fe_by_name(pname); } if (!px) { memprintf(err, "%sparsing [%s:%d]: unable to find frontend '%s' referenced in arg %d of %s%s%s%s '%s' %s proxy '%s'.\n", *err ? *err : "", cur->file, cur->line, pname, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id); cfgerr++; break; } if (!(px->cap & PR_CAP_FE)) { memprintf(err, "%sparsing [%s:%d]: proxy '%s', referenced in arg %d of %s%s%s%s '%s' %s proxy '%s', has not frontend capability.\n", *err ? *err : "", cur->file, cur->line, pname, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id); cfgerr++; break; } chunk_destroy(&arg->data.str); arg->unresolved = 0; arg->data.prx = px; break; case ARGT_BE: if (arg->data.str.data) { pname = arg->data.str.area; px = proxy_be_by_name(pname); } if (!px) { memprintf(err, "%sparsing [%s:%d]: unable to find backend '%s' referenced in arg %d of %s%s%s%s '%s' %s proxy '%s'.\n", *err ? *err : "", cur->file, cur->line, pname, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id); cfgerr++; break; } if (!(px->cap & PR_CAP_BE)) { memprintf(err, "%sparsing [%s:%d]: proxy '%s', referenced in arg %d of %s%s%s%s '%s' %s proxy '%s', has not backend capability.\n", *err ? *err : "", cur->file, cur->line, pname, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id); cfgerr++; break; } chunk_destroy(&arg->data.str); arg->unresolved = 0; arg->data.prx = px; break; case ARGT_TAB: if (arg->data.str.data) stktname = arg->data.str.area; else { if (px->cap & PR_CAP_DEF) { memprintf(err, "%sparsing [%s:%d]: table name must be set in arg %d of %s%s%s%s '%s' %s proxy '%s'.\n", *err ? *err : "", cur->file, cur->line, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id); cfgerr++; break; } stktname = px->id; } t = stktable_find_by_name(stktname); if (!t) { memprintf(err, "%sparsing [%s:%d]: unable to find table '%s' referenced in arg %d of %s%s%s%s '%s' %s proxy '%s'.\n", *err ? *err : "", cur->file, cur->line, stktname, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id); cfgerr++; break; } if (!t->size) { memprintf(err, "%sparsing [%s:%d]: no table in proxy '%s' referenced in arg %d of %s%s%s%s '%s' %s proxy '%s'.\n", *err ? *err : "", cur->file, cur->line, stktname, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id); cfgerr++; break; } if (!in_proxies_list(t->proxies_list, p)) { p->next_stkt_ref = t->proxies_list; t->proxies_list = p; } chunk_destroy(&arg->data.str); arg->unresolved = 0; arg->data.t = t; break; case ARGT_USR: if (!arg->data.str.data) { memprintf(err, "%sparsing [%s:%d]: missing userlist name in arg %d of %s%s%s%s '%s' %s proxy '%s'.\n", *err ? *err : "", cur->file, cur->line, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id); cfgerr++; break; } if (p->uri_auth && p->uri_auth->userlist && strcmp(p->uri_auth->userlist->name, arg->data.str.area) == 0) ul = p->uri_auth->userlist; else ul = auth_find_userlist(arg->data.str.area); if (!ul) { memprintf(err, "%sparsing [%s:%d]: unable to find userlist '%s' referenced in arg %d of %s%s%s%s '%s' %s proxy '%s'.\n", *err ? *err : "", cur->file, cur->line, arg->data.str.area, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id); cfgerr++; break; } chunk_destroy(&arg->data.str); arg->unresolved = 0; arg->data.usr = ul; break; case ARGT_REG: if (!arg->data.str.data) { memprintf(err, "%sparsing [%s:%d]: missing regex in arg %d of %s%s%s%s '%s' %s proxy '%s'.\n", *err ? *err : "", cur->file, cur->line, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id); cfgerr++; continue; } rflags = 0; rflags |= (arg->type_flags & ARGF_REG_ICASE) ? REG_ICASE : 0; err2 = NULL; if (!(reg = regex_comp(arg->data.str.area, !(rflags & REG_ICASE), 1 /* capture substr */, &err2))) { memprintf(err, "%sparsing [%s:%d]: error in regex '%s' in arg %d of %s%s%s%s '%s' %s proxy '%s' : %s.\n", *err ? *err : "", cur->file, cur->line, arg->data.str.area, cur->arg_pos + 1, conv_pre, conv_ctx, conv_pos, ctx, cur->kw, where, p->id, err2); cfgerr++; continue; } chunk_destroy(&arg->data.str); arg->unresolved = 0; arg->data.reg = reg; break; } LIST_DELETE(&cur->list); free(cur); } /* end of args processing */ return cfgerr; } /* * Process a fetch + format conversion as defined by the sample expression * on request or response considering the parameter. The output is * not explicitly set to , but shall be compatible with it as * specified by 'sample_casts' table. If a stable sample can be fetched, or an * unstable one when contains SMP_OPT_FINAL, the sample is converted and * returned without the SMP_F_MAY_CHANGE flag. If an unstable sample is found * and does not contain SMP_OPT_FINAL, then the sample is returned as-is * with its SMP_F_MAY_CHANGE flag so that the caller can check it and decide to * take actions (eg: wait longer). If a sample could not be found or could not * be converted, NULL is returned. The caller MUST NOT use the sample if the * SMP_F_MAY_CHANGE flag is present, as it is used only as a hint that there is * still hope to get it after waiting longer, and is not converted to string. * The possible output combinations are the following : * * return MAY_CHANGE FINAL Meaning for the sample * NULL * * Not present and will never be (eg: header) * smp 0 * Final value converted (eg: header) * smp 1 0 Not present yet, may appear later (eg: header) * smp 1 1 never happens (either flag is cleared on output) */ struct sample *sample_fetch_as_type(struct proxy *px, struct session *sess, struct stream *strm, unsigned int opt, struct sample_expr *expr, int smp_type) { struct sample *smp = &temp_smp; memset(smp, 0, sizeof(*smp)); if (!sample_process(px, sess, strm, opt, expr, smp)) { if ((smp->flags & SMP_F_MAY_CHANGE) && !(opt & SMP_OPT_FINAL)) return smp; return NULL; } if (!sample_casts[smp->data.type][smp_type]) return NULL; if (sample_casts[smp->data.type][smp_type] != c_none && !sample_casts[smp->data.type][smp_type](smp)) return NULL; smp->flags &= ~SMP_F_MAY_CHANGE; return smp; } static void release_sample_arg(struct arg *p) { struct arg *p_back = p; if (!p) return; while (p->type != ARGT_STOP) { if (p->type == ARGT_STR || p->unresolved) { chunk_destroy(&p->data.str); p->unresolved = 0; } else if (p->type == ARGT_REG) { regex_free(p->data.reg); p->data.reg = NULL; } p++; } if (p_back != empty_arg_list) free(p_back); } void release_sample_expr(struct sample_expr *expr) { struct sample_conv_expr *conv_expr, *conv_exprb; if (!expr) return; list_for_each_entry_safe(conv_expr, conv_exprb, &expr->conv_exprs, list) { LIST_DELETE(&conv_expr->list); release_sample_arg(conv_expr->arg_p); free(conv_expr); } release_sample_arg(expr->arg_p); free(expr); } /*****************************************************************/ /* Sample format convert functions */ /* These functions set the data type on return. */ /*****************************************************************/ static int sample_conv_debug(const struct arg *arg_p, struct sample *smp, void *private) { int i; struct sample tmp; struct buffer *buf; struct sink *sink; struct ist line; char *pfx; buf = alloc_trash_chunk(); if (!buf) goto end; sink = (struct sink *)arg_p[1].data.ptr; BUG_ON(!sink); pfx = arg_p[0].data.str.area; BUG_ON(!pfx); chunk_printf(buf, "[debug] %s: type=%s ", pfx, smp_to_type[smp->data.type]); if (!sample_casts[smp->data.type][SMP_T_STR]) goto nocast; /* Copy sample fetch. This puts the sample as const, the * cast will copy data if a transformation is required. */ memcpy(&tmp, smp, sizeof(struct sample)); tmp.flags = SMP_F_CONST; if (!sample_casts[smp->data.type][SMP_T_STR](&tmp)) goto nocast; /* Display the displayable chars*. */ b_putchr(buf, '<'); for (i = 0; i < tmp.data.u.str.data; i++) { if (isprint((unsigned char)tmp.data.u.str.area[i])) b_putchr(buf, tmp.data.u.str.area[i]); else b_putchr(buf, '.'); } b_putchr(buf, '>'); done: line = ist2(buf->area, buf->data); sink_write(sink, &line, 1, 0, 0, NULL); end: free_trash_chunk(buf); return 1; nocast: chunk_appendf(buf, "(undisplayable)"); goto done; } // This function checks the "debug" converter's arguments. static int smp_check_debug(struct arg *args, struct sample_conv *conv, const char *file, int line, char **err) { const char *name = "buf0"; struct sink *sink = NULL; if (args[0].type != ARGT_STR) { /* optional prefix */ args[0].data.str.area = ""; args[0].data.str.data = 0; } if (args[1].type == ARGT_STR) name = args[1].data.str.area; sink = sink_find(name); if (!sink) { memprintf(err, "No such sink '%s'", name); return 0; } chunk_destroy(&args[1].data.str); args[1].type = ARGT_PTR; args[1].data.ptr = sink; return 1; } static int sample_conv_base642bin(const struct arg *arg_p, struct sample *smp, void *private) { struct buffer *trash = get_trash_chunk(); int bin_len; trash->data = 0; bin_len = base64dec(smp->data.u.str.area, smp->data.u.str.data, trash->area, trash->size); if (bin_len < 0) return 0; trash->data = bin_len; smp->data.u.str = *trash; smp->data.type = SMP_T_BIN; smp->flags &= ~SMP_F_CONST; return 1; } static int sample_conv_base64url2bin(const struct arg *arg_p, struct sample *smp, void *private) { struct buffer *trash = get_trash_chunk(); int bin_len; trash->data = 0; bin_len = base64urldec(smp->data.u.str.area, smp->data.u.str.data, trash->area, trash->size); if (bin_len < 0) return 0; trash->data = bin_len; smp->data.u.str = *trash; smp->data.type = SMP_T_BIN; smp->flags &= ~SMP_F_CONST; return 1; } static int sample_conv_bin2base64(const struct arg *arg_p, struct sample *smp, void *private) { struct buffer *trash = get_trash_chunk(); int b64_len; trash->data = 0; b64_len = a2base64(smp->data.u.str.area, smp->data.u.str.data, trash->area, trash->size); if (b64_len < 0) return 0; trash->data = b64_len; smp->data.u.str = *trash; smp->data.type = SMP_T_STR; smp->flags &= ~SMP_F_CONST; return 1; } static int sample_conv_bin2base64url(const struct arg *arg_p, struct sample *smp, void *private) { struct buffer *trash = get_trash_chunk(); int b64_len; trash->data = 0; b64_len = a2base64url(smp->data.u.str.area, smp->data.u.str.data, trash->area, trash->size); if (b64_len < 0) return 0; trash->data = b64_len; smp->data.u.str = *trash; smp->data.type = SMP_T_STR; smp->flags &= ~SMP_F_CONST; return 1; } /* This function returns a sample struct filled with the conversion of variable * to sample type (SMP_T_*), via a cast to the target type. If the * variable cannot be retrieved or casted, 0 is returned, otherwise 1. * * Keep in mind that the sample content may be written to a pre-allocated * trash chunk as returned by get_trash_chunk(). */ int sample_conv_var2smp(const struct var_desc *var, struct sample *smp, int type) { if (!vars_get_by_desc(var, smp, NULL)) return 0; if (!sample_casts[smp->data.type][type]) return 0; if (!sample_casts[smp->data.type][type](smp)) return 0; return 1; } static int sample_conv_sha1(const struct arg *arg_p, struct sample *smp, void *private) { blk_SHA_CTX ctx; struct buffer *trash = get_trash_chunk(); memset(&ctx, 0, sizeof(ctx)); blk_SHA1_Init(&ctx); blk_SHA1_Update(&ctx, smp->data.u.str.area, smp->data.u.str.data); blk_SHA1_Final((unsigned char *) trash->area, &ctx); trash->data = 20; smp->data.u.str = *trash; smp->data.type = SMP_T_BIN; smp->flags &= ~SMP_F_CONST; return 1; } /* This function returns a sample struct filled with an content. * If the contains a string, it is returned in the sample flagged as * SMP_F_CONST. If the contains a variable descriptor, the sample is * filled with the content of the variable by using vars_get_by_desc(). * * Keep in mind that the sample content may be written to a pre-allocated * trash chunk as returned by get_trash_chunk(). * * This function returns 0 if an error occurs, otherwise it returns 1. */ int sample_conv_var2smp_str(const struct arg *arg, struct sample *smp) { switch (arg->type) { case ARGT_STR: smp->data.type = SMP_T_STR; smp->data.u.str = arg->data.str; smp->flags = SMP_F_CONST; return 1; case ARGT_VAR: return sample_conv_var2smp(&arg->data.var, smp, SMP_T_STR); default: return 0; } } static int sample_conv_be2dec_check(struct arg *args, struct sample_conv *conv, const char *file, int line, char **err) { if (args[1].data.sint <= 0 || args[1].data.sint > sizeof(unsigned long long)) { memprintf(err, "chunk_size out of [1..%u] range (%lld)", (uint)sizeof(unsigned long long), args[1].data.sint); return 0; } if (args[2].data.sint != 0 && args[2].data.sint != 1) { memprintf(err, "Unsupported truncate value (%lld)", args[2].data.sint); return 0; } return 1; } /* Converts big-endian binary input sample to a string containing an unsigned * integer number per input bytes separated with . * Optional flag indicates if input is truncated at * boundaries. * Arguments: separator (string), chunk_size (integer), truncate (0,1) */ static int sample_conv_be2dec(const struct arg *args, struct sample *smp, void *private) { struct buffer *trash = get_trash_chunk(); const int last = args[2].data.sint ? smp->data.u.str.data - args[1].data.sint + 1 : smp->data.u.str.data; int max_size = trash->size - 2; int i; int start; int ptr = 0; unsigned long long number; char *pos; trash->data = 0; while (ptr < last && trash->data <= max_size) { start = trash->data; if (ptr) { /* Add separator */ memcpy(trash->area + trash->data, args[0].data.str.area, args[0].data.str.data); trash->data += args[0].data.str.data; } else max_size -= args[0].data.str.data; /* Add integer */ for (number = 0, i = 0; i < args[1].data.sint && ptr < smp->data.u.str.data; i++) number = (number << 8) + (unsigned char)smp->data.u.str.area[ptr++]; pos = ulltoa(number, trash->area + trash->data, trash->size - trash->data); if (pos) trash->data = pos - trash->area; else { trash->data = start; break; } } smp->data.u.str = *trash; smp->data.type = SMP_T_STR; smp->flags &= ~SMP_F_CONST; return 1; } static int sample_conv_be2hex_check(struct arg *args, struct sample_conv *conv, const char *file, int line, char **err) { if (args[1].data.sint <= 0 && (args[0].data.str.data > 0 || args[2].data.sint != 0)) { memprintf(err, "chunk_size needs to be positive (%lld)", args[1].data.sint); return 0; } if (args[2].data.sint != 0 && args[2].data.sint != 1) { memprintf(err, "Unsupported truncate value (%lld)", args[2].data.sint); return 0; } return 1; } /* Converts big-endian binary input sample to a hex string containing two hex * digits per input byte. is put every binary input * bytes if specified. Optional flag indicates if input is truncated * at boundaries. * Arguments: separator (string), chunk_size (integer), truncate (0,1) */ static int sample_conv_be2hex(const struct arg *args, struct sample *smp, void *private) { struct buffer *trash = get_trash_chunk(); int chunk_size = args[1].data.sint; const int last = args[2].data.sint ? smp->data.u.str.data - chunk_size + 1 : smp->data.u.str.data; int i; int max_size; int ptr = 0; unsigned char c; trash->data = 0; if (args[0].data.str.data == 0 && args[2].data.sint == 0) chunk_size = smp->data.u.str.data; max_size = trash->size - 2 * chunk_size; while (ptr < last && trash->data <= max_size) { if (ptr) { /* Add separator */ memcpy(trash->area + trash->data, args[0].data.str.area, args[0].data.str.data); trash->data += args[0].data.str.data; } else max_size -= args[0].data.str.data; /* Add hex */ for (i = 0; i < chunk_size && ptr < smp->data.u.str.data; i++) { c = smp->data.u.str.area[ptr++]; trash->area[trash->data++] = hextab[(c >> 4) & 0xF]; trash->area[trash->data++] = hextab[c & 0xF]; } } smp->data.u.str = *trash; smp->data.type = SMP_T_STR; smp->flags &= ~SMP_F_CONST; return 1; } static int sample_conv_bin2hex(const struct arg *arg_p, struct sample *smp, void *private) { struct buffer *trash = get_trash_chunk(); unsigned char c; int ptr = 0; trash->data = 0; while (ptr < smp->data.u.str.data && trash->data <= trash->size - 2) { c = smp->data.u.str.area[ptr++]; trash->area[trash->data++] = hextab[(c >> 4) & 0xF]; trash->area[trash->data++] = hextab[c & 0xF]; } smp->data.u.str = *trash; smp->data.type = SMP_T_STR; smp->flags &= ~SMP_F_CONST; return 1; } static int sample_conv_hex2int(const struct arg *arg_p, struct sample *smp, void *private) { long long int n = 0; int i, c; for (i = 0; i < smp->data.u.str.data; i++) { if ((c = hex2i(smp->data.u.str.area[i])) < 0) return 0; n = (n << 4) + c; } smp->data.u.sint = n; smp->data.type = SMP_T_SINT; smp->flags &= ~SMP_F_CONST; return 1; } /* hashes the binary input into a 32-bit unsigned int */ static int sample_conv_djb2(const struct arg *arg_p, struct sample *smp, void *private) { smp->data.u.sint = hash_djb2(smp->data.u.str.area, smp->data.u.str.data); if (arg_p->data.sint) smp->data.u.sint = full_hash(smp->data.u.sint); smp->data.type = SMP_T_SINT; return 1; } static int sample_conv_length(const struct arg *arg_p, struct sample *smp, void *private) { int i = smp->data.u.str.data; smp->data.u.sint = i; smp->data.type = SMP_T_SINT; return 1; } static int sample_conv_str2lower(const struct arg *arg_p, struct sample *smp, void *private) { int i; if (!smp_make_rw(smp)) return 0; for (i = 0; i < smp->data.u.str.data; i++) { if ((smp->data.u.str.area[i] >= 'A') && (smp->data.u.str.area[i] <= 'Z')) smp->data.u.str.area[i] += 'a' - 'A'; } return 1; } static int sample_conv_str2upper(const struct arg *arg_p, struct sample *smp, void *private) { int i; if (!smp_make_rw(smp)) return 0; for (i = 0; i < smp->data.u.str.data; i++) { if ((smp->data.u.str.area[i] >= 'a') && (smp->data.u.str.area[i] <= 'z')) smp->data.u.str.area[i] += 'A' - 'a'; } return 1; } /* takes the IPv4 mask in args[0] and an optional IPv6 mask in args[1] */ static int sample_conv_ipmask(const struct arg *args, struct sample *smp, void *private) { /* Attempt to convert to IPv4 to apply the correct mask. */ c_ipv62ip(smp); if (smp->data.type == SMP_T_IPV4) { smp->data.u.ipv4.s_addr &= args[0].data.ipv4.s_addr; smp->data.type = SMP_T_IPV4; } else if (smp->data.type == SMP_T_IPV6) { /* IPv6 cannot be converted without an IPv6 mask. */ if (args[1].type != ARGT_IPV6) return 0; write_u64(&smp->data.u.ipv6.s6_addr[0], read_u64(&smp->data.u.ipv6.s6_addr[0]) & read_u64(&args[1].data.ipv6.s6_addr[0])); write_u64(&smp->data.u.ipv6.s6_addr[8], read_u64(&smp->data.u.ipv6.s6_addr[8]) & read_u64(&args[1].data.ipv6.s6_addr[8])); smp->data.type = SMP_T_IPV6; } return 1; } /* takes an UINT value on input supposed to represent the time since EPOCH, * adds an optional offset found in args[1] and emits a string representing * the local time in the format specified in args[1] using strftime(). */ static int sample_conv_ltime(const struct arg *args, struct sample *smp, void *private) { struct buffer *temp; /* With high numbers, the date returned can be negative, the 55 bits mask prevent this. */ time_t curr_date = smp->data.u.sint & 0x007fffffffffffffLL; struct tm tm; /* add offset */ if (args[1].type == ARGT_SINT) curr_date += args[1].data.sint; get_localtime(curr_date, &tm); temp = get_trash_chunk(); temp->data = strftime(temp->area, temp->size, args[0].data.str.area, &tm); smp->data.u.str = *temp; smp->data.type = SMP_T_STR; return 1; } /* hashes the binary input into a 32-bit unsigned int */ static int sample_conv_sdbm(const struct arg *arg_p, struct sample *smp, void *private) { smp->data.u.sint = hash_sdbm(smp->data.u.str.area, smp->data.u.str.data); if (arg_p->data.sint) smp->data.u.sint = full_hash(smp->data.u.sint); smp->data.type = SMP_T_SINT; return 1; } /* takes an UINT value on input supposed to represent the time since EPOCH, * adds an optional offset found in args[1] and emits a string representing * the UTC date in the format specified in args[1] using strftime(). */ static int sample_conv_utime(const struct arg *args, struct sample *smp, void *private) { struct buffer *temp; /* With high numbers, the date returned can be negative, the 55 bits mask prevent this. */ time_t curr_date = smp->data.u.sint & 0x007fffffffffffffLL; struct tm tm; /* add offset */ if (args[1].type == ARGT_SINT) curr_date += args[1].data.sint; get_gmtime(curr_date, &tm); temp = get_trash_chunk(); temp->data = strftime(temp->area, temp->size, args[0].data.str.area, &tm); smp->data.u.str = *temp; smp->data.type = SMP_T_STR; return 1; } /* hashes the binary input into a 32-bit unsigned int */ static int sample_conv_wt6(const struct arg *arg_p, struct sample *smp, void *private) { smp->data.u.sint = hash_wt6(smp->data.u.str.area, smp->data.u.str.data); if (arg_p->data.sint) smp->data.u.sint = full_hash(smp->data.u.sint); smp->data.type = SMP_T_SINT; return 1; } /* hashes the binary input into a 32-bit unsigned int using xxh. * The seed of the hash defaults to 0 but can be changd in argument 1. */ static int sample_conv_xxh32(const struct arg *arg_p, struct sample *smp, void *private) { unsigned int seed; if (arg_p->data.sint) seed = arg_p->data.sint; else seed = 0; smp->data.u.sint = XXH32(smp->data.u.str.area, smp->data.u.str.data, seed); smp->data.type = SMP_T_SINT; return 1; } /* hashes the binary input into a 64-bit unsigned int using xxh. * In fact, the function returns a 64 bit unsigned, but the sample * storage of haproxy only proposes 64-bits signed, so the value is * cast as signed. This cast doesn't impact the hash repartition. * The seed of the hash defaults to 0 but can be changd in argument 1. */ static int sample_conv_xxh64(const struct arg *arg_p, struct sample *smp, void *private) { unsigned long long int seed; if (arg_p->data.sint) seed = (unsigned long long int)arg_p->data.sint; else seed = 0; smp->data.u.sint = (long long int)XXH64(smp->data.u.str.area, smp->data.u.str.data, seed); smp->data.type = SMP_T_SINT; return 1; } static int sample_conv_xxh3(const struct arg *arg_p, struct sample *smp, void *private) { unsigned long long int seed; if (arg_p->data.sint) seed = (unsigned long long int)arg_p->data.sint; else seed = 0; smp->data.u.sint = (long long int)XXH3(smp->data.u.str.area, smp->data.u.str.data, seed); smp->data.type = SMP_T_SINT; return 1; } /* hashes the binary input into a 32-bit unsigned int */ static int sample_conv_crc32(const struct arg *arg_p, struct sample *smp, void *private) { smp->data.u.sint = hash_crc32(smp->data.u.str.area, smp->data.u.str.data); if (arg_p->data.sint) smp->data.u.sint = full_hash(smp->data.u.sint); smp->data.type = SMP_T_SINT; return 1; } /* hashes the binary input into crc32c (RFC4960, Appendix B [8].) */ static int sample_conv_crc32c(const struct arg *arg_p, struct sample *smp, void *private) { smp->data.u.sint = hash_crc32c(smp->data.u.str.area, smp->data.u.str.data); if (arg_p->data.sint) smp->data.u.sint = full_hash(smp->data.u.sint); smp->data.type = SMP_T_SINT; return 1; } /* This function escape special json characters. The returned string can be * safely set between two '"' and used as json string. The json string is * defined like this: * * any Unicode character except '"' or '\' or control character * \", \\, \/, \b, \f, \n, \r, \t, \u + four-hex-digits * * The enum input_type contain all the allowed mode for decoding the input * string. */ enum input_type { IT_ASCII = 0, IT_UTF8, IT_UTF8S, IT_UTF8P, IT_UTF8PS, }; static int sample_conv_json_check(struct arg *arg, struct sample_conv *conv, const char *file, int line, char **err) { enum input_type type; if (strcmp(arg->data.str.area, "") == 0) type = IT_ASCII; else if (strcmp(arg->data.str.area, "ascii") == 0) type = IT_ASCII; else if (strcmp(arg->data.str.area, "utf8") == 0) type = IT_UTF8; else if (strcmp(arg->data.str.area, "utf8s") == 0) type = IT_UTF8S; else if (strcmp(arg->data.str.area, "utf8p") == 0) type = IT_UTF8P; else if (strcmp(arg->data.str.area, "utf8ps") == 0) type = IT_UTF8PS; else { memprintf(err, "Unexpected input code type. " "Allowed value are 'ascii', 'utf8', 'utf8s', 'utf8p' and 'utf8ps'"); return 0; } chunk_destroy(&arg->data.str); arg->type = ARGT_SINT; arg->data.sint = type; return 1; } static int sample_conv_json(const struct arg *arg_p, struct sample *smp, void *private) { struct buffer *temp; char _str[7]; /* \u + 4 hex digit + null char for sprintf. */ const char *str; int len; enum input_type input_type = IT_ASCII; unsigned int c; unsigned int ret; char *p; input_type = arg_p->data.sint; temp = get_trash_chunk(); temp->data = 0; p = smp->data.u.str.area; while (p < smp->data.u.str.area + smp->data.u.str.data) { if (input_type == IT_ASCII) { /* Read input as ASCII. */ c = *(unsigned char *)p; p++; } else { /* Read input as UTF8. */ ret = utf8_next(p, smp->data.u.str.data - ( p - smp->data.u.str.area), &c); p += utf8_return_length(ret); if (input_type == IT_UTF8 && utf8_return_code(ret) != UTF8_CODE_OK) return 0; if (input_type == IT_UTF8S && utf8_return_code(ret) != UTF8_CODE_OK) continue; if (input_type == IT_UTF8P && utf8_return_code(ret) & (UTF8_CODE_INVRANGE|UTF8_CODE_BADSEQ)) return 0; if (input_type == IT_UTF8PS && utf8_return_code(ret) & (UTF8_CODE_INVRANGE|UTF8_CODE_BADSEQ)) continue; /* Check too big values. */ if ((unsigned int)c > 0xffff) { if (input_type == IT_UTF8 || input_type == IT_UTF8P) return 0; continue; } } /* Convert character. */ if (c == '"') { len = 2; str = "\\\""; } else if (c == '\\') { len = 2; str = "\\\\"; } else if (c == '/') { len = 2; str = "\\/"; } else if (c == '\b') { len = 2; str = "\\b"; } else if (c == '\f') { len = 2; str = "\\f"; } else if (c == '\r') { len = 2; str = "\\r"; } else if (c == '\n') { len = 2; str = "\\n"; } else if (c == '\t') { len = 2; str = "\\t"; } else if (c > 0xff || !isprint((unsigned char)c)) { /* isprint generate a segfault if c is too big. The man says that * c must have the value of an unsigned char or EOF. */ len = 6; _str[0] = '\\'; _str[1] = 'u'; snprintf(&_str[2], 5, "%04x", (unsigned short)c); str = _str; } else { len = 1; _str[0] = c; str = _str; } /* Check length */ if (temp->data + len > temp->size) return 0; /* Copy string. */ memcpy(temp->area + temp->data, str, len); temp->data += len; } smp->flags &= ~SMP_F_CONST; smp->data.u.str = *temp; smp->data.type = SMP_T_STR; return 1; } /* This sample function is designed to extract some bytes from an input buffer. * First arg is the offset. * Optional second arg is the length to truncate */ static int sample_conv_bytes(const struct arg *arg_p, struct sample *smp, void *private) { if (smp->data.u.str.data <= arg_p[0].data.sint) { smp->data.u.str.data = 0; return 1; } if (smp->data.u.str.size) smp->data.u.str.size -= arg_p[0].data.sint; smp->data.u.str.data -= arg_p[0].data.sint; smp->data.u.str.area += arg_p[0].data.sint; if ((arg_p[1].type == ARGT_SINT) && (arg_p[1].data.sint < smp->data.u.str.data)) smp->data.u.str.data = arg_p[1].data.sint; return 1; } static int sample_conv_field_check(struct arg *args, struct sample_conv *conv, const char *file, int line, char **err) { struct arg *arg = args; if (arg->type != ARGT_SINT) { memprintf(err, "Unexpected arg type"); return 0; } if (!arg->data.sint) { memprintf(err, "Unexpected value 0 for index"); return 0; } arg++; if (arg->type != ARGT_STR) { memprintf(err, "Unexpected arg type"); return 0; } if (!arg->data.str.data) { memprintf(err, "Empty separators list"); return 0; } return 1; } /* This sample function is designed to a return selected part of a string (field). * First arg is the index of the field (start at 1) * Second arg is a char list of separators (type string) */ static int sample_conv_field(const struct arg *arg_p, struct sample *smp, void *private) { int field; char *start, *end; int i; int count = (arg_p[2].type == ARGT_SINT) ? arg_p[2].data.sint : 1; if (!arg_p[0].data.sint) return 0; if (arg_p[0].data.sint < 0) { field = -1; end = start = smp->data.u.str.area + smp->data.u.str.data; while (start > smp->data.u.str.area) { for (i = 0 ; i < arg_p[1].data.str.data; i++) { if (*(start-1) == arg_p[1].data.str.area[i]) { if (field == arg_p[0].data.sint) { if (count == 1) goto found; else if (count > 1) count--; } else { end = start-1; field--; } break; } } start--; } } else { field = 1; end = start = smp->data.u.str.area; while (end - smp->data.u.str.area < smp->data.u.str.data) { for (i = 0 ; i < arg_p[1].data.str.data; i++) { if (*end == arg_p[1].data.str.area[i]) { if (field == arg_p[0].data.sint) { if (count == 1) goto found; else if (count > 1) count--; } else { start = end+1; field++; } break; } } end++; } } /* Field not found */ if (field != arg_p[0].data.sint) { smp->data.u.str.data = 0; return 0; } found: smp->data.u.str.data = end - start; /* If ret string is len 0, no need to change pointers or to update size */ if (!smp->data.u.str.data) return 1; /* Compute remaining size if needed Note: smp->data.u.str.size cannot be set to 0 */ if (smp->data.u.str.size) smp->data.u.str.size -= start - smp->data.u.str.area; smp->data.u.str.area = start; return 1; } /* This sample function is designed to return a word from a string. * First arg is the index of the word (start at 1) * Second arg is a char list of words separators (type string) */ static int sample_conv_word(const struct arg *arg_p, struct sample *smp, void *private) { int word; char *start, *end; int i, issep, inword; int count = (arg_p[2].type == ARGT_SINT) ? arg_p[2].data.sint : 1; if (!arg_p[0].data.sint) return 0; word = 0; inword = 0; if (arg_p[0].data.sint < 0) { end = start = smp->data.u.str.area + smp->data.u.str.data; while (start > smp->data.u.str.area) { issep = 0; for (i = 0 ; i < arg_p[1].data.str.data; i++) { if (*(start-1) == arg_p[1].data.str.area[i]) { issep = 1; break; } } if (!inword) { if (!issep) { if (word != arg_p[0].data.sint) { word--; end = start; } inword = 1; } } else if (issep) { if (word == arg_p[0].data.sint) { if (count == 1) goto found; else if (count > 1) count--; } inword = 0; } start--; } } else { end = start = smp->data.u.str.area; while (end - smp->data.u.str.area < smp->data.u.str.data) { issep = 0; for (i = 0 ; i < arg_p[1].data.str.data; i++) { if (*end == arg_p[1].data.str.area[i]) { issep = 1; break; } } if (!inword) { if (!issep) { if (word != arg_p[0].data.sint) { word++; start = end; } inword = 1; } } else if (issep) { if (word == arg_p[0].data.sint) { if (count == 1) goto found; else if (count > 1) count--; } inword = 0; } end++; } } /* Field not found */ if (word != arg_p[0].data.sint) { smp->data.u.str.data = 0; return 1; } found: smp->data.u.str.data = end - start; /* If ret string is len 0, no need to change pointers or to update size */ if (!smp->data.u.str.data) return 1; /* Compute remaining size if needed Note: smp->data.u.str.size cannot be set to 0 */ if (smp->data.u.str.size) smp->data.u.str.size -= start - smp->data.u.str.area; smp->data.u.str.area = start; return 1; } static int sample_conv_regsub_check(struct arg *args, struct sample_conv *conv, const char *file, int line, char **err) { struct arg *arg = args; char *p; int len; /* arg0 is a regex, it uses type_flag for ICASE and global match */ arg[0].type_flags = 0; if (arg[2].type != ARGT_STR) return 1; p = arg[2].data.str.area; len = arg[2].data.str.data; while (len) { if (*p == 'i') { arg[0].type_flags |= ARGF_REG_ICASE; } else if (*p == 'g') { arg[0].type_flags |= ARGF_REG_GLOB; } else { memprintf(err, "invalid regex flag '%c', only 'i' and 'g' are supported", *p); return 0; } p++; len--; } return 1; } /* This sample function is designed to do the equivalent of s/match/replace/ on * the input string. It applies a regex and restarts from the last matched * location until nothing matches anymore. First arg is the regex to apply to * the input string, second arg is the replacement expression. */ static int sample_conv_regsub(const struct arg *arg_p, struct sample *smp, void *private) { char *start, *end; struct my_regex *reg = arg_p[0].data.reg; regmatch_t pmatch[MAX_MATCH]; struct buffer *trash = get_trash_chunk(); struct buffer *output; int flag, max; int found; start = smp->data.u.str.area; end = start + smp->data.u.str.data; flag = 0; while (1) { /* check for last round which is used to copy remaining parts * when not running in global replacement mode. */ found = 0; if ((arg_p[0].type_flags & ARGF_REG_GLOB) || !(flag & REG_NOTBOL)) { /* Note: we can have start == end on empty strings or at the end */ found = regex_exec_match2(reg, start, end - start, MAX_MATCH, pmatch, flag); } if (!found) pmatch[0].rm_so = end - start; /* copy the heading non-matching part (which may also be the tail if nothing matches) */ max = trash->size - trash->data; if (max && pmatch[0].rm_so > 0) { if (max > pmatch[0].rm_so) max = pmatch[0].rm_so; memcpy(trash->area + trash->data, start, max); trash->data += max; } if (!found) break; output = alloc_trash_chunk(); if (!output) break; output->data = exp_replace(output->area, output->size, start, arg_p[1].data.str.area, pmatch); /* replace the matching part */ max = output->size - output->data; if (max) { if (max > output->data) max = output->data; memcpy(trash->area + trash->data, output->area, max); trash->data += max; } free_trash_chunk(output); /* stop here if we're done with this string */ if (start >= end) break; /* We have a special case for matches of length 0 (eg: "x*y*"). * These ones are considered to match in front of a character, * so we have to copy that character and skip to the next one. */ if (!pmatch[0].rm_eo) { if (trash->data < trash->size) trash->area[trash->data++] = start[pmatch[0].rm_eo]; pmatch[0].rm_eo++; } start += pmatch[0].rm_eo; flag |= REG_NOTBOL; } smp->data.u.str = *trash; return 1; } /* This function check an operator entry. It expects a string. * The string can be an integer or a variable name. */ static int check_operator(struct arg *args, struct sample_conv *conv, const char *file, int line, char **err) { const char *str; const char *end; long long int i; /* Try to decode a variable. */ if (vars_check_arg(&args[0], NULL)) return 1; /* Try to convert an integer */ str = args[0].data.str.area; end = str + strlen(str); i = read_int64(&str, end); if (*str != '\0') { memprintf(err, "expects an integer or a variable name"); return 0; } chunk_destroy(&args[0].data.str); args[0].type = ARGT_SINT; args[0].data.sint = i; return 1; } /* This function returns a sample struct filled with an arg content. * If the arg contain an integer, the integer is returned in the * sample. If the arg contains a variable descriptor, it returns the * variable value. * * This function returns 0 if an error occurs, otherwise it returns 1. */ int sample_conv_var2smp_sint(const struct arg *arg, struct sample *smp) { switch (arg->type) { case ARGT_SINT: smp->data.type = SMP_T_SINT; smp->data.u.sint = arg->data.sint; return 1; case ARGT_VAR: return sample_conv_var2smp(&arg->data.var, smp, SMP_T_SINT); default: return 0; } } /* Takes a SINT on input, applies a binary twos complement and returns the SINT * result. */ static int sample_conv_binary_cpl(const struct arg *arg_p, struct sample *smp, void *private) { smp->data.u.sint = ~smp->data.u.sint; return 1; } /* Takes a SINT on input, applies a binary "and" with the SINT directly in * arg_p or in the variable described in arg_p, and returns the SINT result. */ static int sample_conv_binary_and(const struct arg *arg_p, struct sample *smp, void *private) { struct sample tmp; smp_set_owner(&tmp, smp->px, smp->sess, smp->strm, smp->opt); if (!sample_conv_var2smp_sint(arg_p, &tmp)) return 0; smp->data.u.sint &= tmp.data.u.sint; return 1; } /* Takes a SINT on input, applies a binary "or" with the SINT directly in * arg_p or in the variable described in arg_p, and returns the SINT result. */ static int sample_conv_binary_or(const struct arg *arg_p, struct sample *smp, void *private) { struct sample tmp; smp_set_owner(&tmp, smp->px, smp->sess, smp->strm, smp->opt); if (!sample_conv_var2smp_sint(arg_p, &tmp)) return 0; smp->data.u.sint |= tmp.data.u.sint; return 1; } /* Takes a SINT on input, applies a binary "xor" with the SINT directly in * arg_p or in the variable described in arg_p, and returns the SINT result. */ static int sample_conv_binary_xor(const struct arg *arg_p, struct sample *smp, void *private) { struct sample tmp; smp_set_owner(&tmp, smp->px, smp->sess, smp->strm, smp->opt); if (!sample_conv_var2smp_sint(arg_p, &tmp)) return 0; smp->data.u.sint ^= tmp.data.u.sint; return 1; } static inline long long int arith_add(long long int a, long long int b) { /* Prevent overflow and makes capped calculus. * We must ensure that the check calculus doesn't * exceed the signed 64 bits limits. * * +----------+----------+ * | a<0 | a>=0 | * +------+----------+----------+ * | b<0 | MIN-a>b | no check | * +------+----------+----------+ * | b>=0 | no check | MAX-a= 0) { /* signs are different. */ if (a < 0) { if (LLONG_MIN - a > b) return LLONG_MIN; } if (LLONG_MAX - a < b) return LLONG_MAX; } return a + b; } /* Takes a SINT on input, applies an arithmetic "add" with the SINT directly in * arg_p or in the variable described in arg_p, and returns the SINT result. */ static int sample_conv_arith_add(const struct arg *arg_p, struct sample *smp, void *private) { struct sample tmp; smp_set_owner(&tmp, smp->px, smp->sess, smp->strm, smp->opt); if (!sample_conv_var2smp_sint(arg_p, &tmp)) return 0; smp->data.u.sint = arith_add(smp->data.u.sint, tmp.data.u.sint); return 1; } /* Takes a SINT on input, applies an arithmetic "sub" with the SINT directly in * arg_p or in the variable described in arg_p, and returns the SINT result. */ static int sample_conv_arith_sub(const struct arg *arg_p, struct sample *smp, void *private) { struct sample tmp; smp_set_owner(&tmp, smp->px, smp->sess, smp->strm, smp->opt); if (!sample_conv_var2smp_sint(arg_p, &tmp)) return 0; /* We cannot represent -LLONG_MIN because abs(LLONG_MIN) is greater * than abs(LLONG_MAX). So, the following code use LLONG_MAX in place * of -LLONG_MIN and correct the result. */ if (tmp.data.u.sint == LLONG_MIN) { smp->data.u.sint = arith_add(smp->data.u.sint, LLONG_MAX); if (smp->data.u.sint < LLONG_MAX) smp->data.u.sint++; return 1; } /* standard subtraction: we use the "add" function and negate * the second operand. */ smp->data.u.sint = arith_add(smp->data.u.sint, -tmp.data.u.sint); return 1; } /* Takes a SINT on input, applies an arithmetic "mul" with the SINT directly in * arg_p or in the variable described in arg_p, and returns the SINT result. * If the result makes an overflow, then the largest possible quantity is * returned. */ static int sample_conv_arith_mul(const struct arg *arg_p, struct sample *smp, void *private) { struct sample tmp; long long int c; smp_set_owner(&tmp, smp->px, smp->sess, smp->strm, smp->opt); if (!sample_conv_var2smp_sint(arg_p, &tmp)) return 0; /* prevent divide by 0 during the check */ if (!smp->data.u.sint || !tmp.data.u.sint) { smp->data.u.sint = 0; return 1; } /* The multiply between LLONG_MIN and -1 returns a * "floating point exception". */ if (smp->data.u.sint == LLONG_MIN && tmp.data.u.sint == -1) { smp->data.u.sint = LLONG_MAX; return 1; } /* execute standard multiplication. */ c = smp->data.u.sint * tmp.data.u.sint; /* check for overflow and makes capped multiply. */ if (smp->data.u.sint != c / tmp.data.u.sint) { if ((smp->data.u.sint < 0) == (tmp.data.u.sint < 0)) { smp->data.u.sint = LLONG_MAX; return 1; } smp->data.u.sint = LLONG_MIN; return 1; } smp->data.u.sint = c; return 1; } /* Takes a SINT on input, applies an arithmetic "div" with the SINT directly in * arg_p or in the variable described in arg_p, and returns the SINT result. * If arg_p makes the result overflow, then the largest possible quantity is * returned. */ static int sample_conv_arith_div(const struct arg *arg_p, struct sample *smp, void *private) { struct sample tmp; smp_set_owner(&tmp, smp->px, smp->sess, smp->strm, smp->opt); if (!sample_conv_var2smp_sint(arg_p, &tmp)) return 0; if (tmp.data.u.sint) { /* The divide between LLONG_MIN and -1 returns a * "floating point exception". */ if (smp->data.u.sint == LLONG_MIN && tmp.data.u.sint == -1) { smp->data.u.sint = LLONG_MAX; return 1; } smp->data.u.sint /= tmp.data.u.sint; return 1; } smp->data.u.sint = LLONG_MAX; return 1; } /* Takes a SINT on input, applies an arithmetic "mod" with the SINT directly in * arg_p or in the variable described in arg_p, and returns the SINT result. * If arg_p makes the result overflow, then 0 is returned. */ static int sample_conv_arith_mod(const struct arg *arg_p, struct sample *smp, void *private) { struct sample tmp; smp_set_owner(&tmp, smp->px, smp->sess, smp->strm, smp->opt); if (!sample_conv_var2smp_sint(arg_p, &tmp)) return 0; if (tmp.data.u.sint) { /* The divide between LLONG_MIN and -1 returns a * "floating point exception". */ if (smp->data.u.sint == LLONG_MIN && tmp.data.u.sint == -1) { smp->data.u.sint = 0; return 1; } smp->data.u.sint %= tmp.data.u.sint; return 1; } smp->data.u.sint = 0; return 1; } /* Takes an SINT on input, applies an arithmetic "neg" and returns the SINT * result. */ static int sample_conv_arith_neg(const struct arg *arg_p, struct sample *smp, void *private) { if (smp->data.u.sint == LLONG_MIN) smp->data.u.sint = LLONG_MAX; else smp->data.u.sint = -smp->data.u.sint; return 1; } /* Takes a SINT on input, returns true is the value is non-null, otherwise * false. The output is a BOOL. */ static int sample_conv_arith_bool(const struct arg *arg_p, struct sample *smp, void *private) { smp->data.u.sint = !!smp->data.u.sint; smp->data.type = SMP_T_BOOL; return 1; } /* Takes a SINT on input, returns false is the value is non-null, otherwise * truee. The output is a BOOL. */ static int sample_conv_arith_not(const struct arg *arg_p, struct sample *smp, void *private) { smp->data.u.sint = !smp->data.u.sint; smp->data.type = SMP_T_BOOL; return 1; } /* Takes a SINT on input, returns true is the value is odd, otherwise false. * The output is a BOOL. */ static int sample_conv_arith_odd(const struct arg *arg_p, struct sample *smp, void *private) { smp->data.u.sint = smp->data.u.sint & 1; smp->data.type = SMP_T_BOOL; return 1; } /* Takes a SINT on input, returns true is the value is even, otherwise false. * The output is a BOOL. */ static int sample_conv_arith_even(const struct arg *arg_p, struct sample *smp, void *private) { smp->data.u.sint = !(smp->data.u.sint & 1); smp->data.type = SMP_T_BOOL; return 1; } /* appends an optional const string, an optional variable contents and another * optional const string to an existing string. */ static int sample_conv_concat(const struct arg *arg_p, struct sample *smp, void *private) { struct buffer *trash; struct sample tmp; int max; trash = alloc_trash_chunk(); if (!trash) return 0; trash->data = smp->data.u.str.data; if (trash->data > trash->size - 1) trash->data = trash->size - 1; memcpy(trash->area, smp->data.u.str.area, trash->data); trash->area[trash->data] = 0; /* append first string */ max = arg_p[0].data.str.data; if (max > trash->size - 1 - trash->data) max = trash->size - 1 - trash->data; if (max) { memcpy(trash->area + trash->data, arg_p[0].data.str.area, max); trash->data += max; trash->area[trash->data] = 0; } /* append second string (variable) if it's found and we can turn it * into a string. */ smp_set_owner(&tmp, smp->px, smp->sess, smp->strm, smp->opt); if (arg_p[1].type == ARGT_VAR && vars_get_by_desc(&arg_p[1].data.var, &tmp, NULL) && (sample_casts[tmp.data.type][SMP_T_STR] == c_none || sample_casts[tmp.data.type][SMP_T_STR](&tmp))) { max = tmp.data.u.str.data; if (max > trash->size - 1 - trash->data) max = trash->size - 1 - trash->data; if (max) { memcpy(trash->area + trash->data, tmp.data.u.str.area, max); trash->data += max; trash->area[trash->data] = 0; } } /* append third string */ max = arg_p[2].data.str.data; if (max > trash->size - 1 - trash->data) max = trash->size - 1 - trash->data; if (max) { memcpy(trash->area + trash->data, arg_p[2].data.str.area, max); trash->data += max; trash->area[trash->data] = 0; } smp->data.u.str = *trash; smp->data.type = SMP_T_STR; smp_dup(smp); free_trash_chunk(trash); return 1; } /* This function checks the "concat" converter's arguments and extracts the * variable name and its scope. */ static int smp_check_concat(struct arg *args, struct sample_conv *conv, const char *file, int line, char **err) { /* Try to decode a variable. */ if (args[1].data.str.data > 0 && !vars_check_arg(&args[1], NULL)) { memprintf(err, "failed to register variable name '%s'", args[1].data.str.area); return 0; } return 1; } /* Append delimiter (only to a non empty input) followed by the optional * variable contents concatenated with the optional sufix. */ static int sample_conv_add_item(const struct arg *arg_p, struct sample *smp, void *private) { struct buffer *tmpbuf; struct sample tmp; size_t max; int var_available; tmpbuf = alloc_trash_chunk(); if (!tmpbuf) return 0; tmpbuf->data = smp->data.u.str.data; if (tmpbuf->data > tmpbuf->size - 1) tmpbuf->data = tmpbuf->size - 1; memcpy(tmpbuf->area, smp->data.u.str.area, tmpbuf->data); tmpbuf->area[tmpbuf->data] = 0; /* Check if variable is found and we can turn into a string. */ var_available = 0; smp_set_owner(&tmp, smp->px, smp->sess, smp->strm, smp->opt); if (arg_p[1].type == ARGT_VAR && vars_get_by_desc(&arg_p[1].data.var, &tmp, NULL) && (sample_casts[tmp.data.type][SMP_T_STR] == c_none || sample_casts[tmp.data.type][SMP_T_STR](&tmp))) var_available = 1; /* Append delimiter only if input is not empty and either * the variable or the suffix are not empty */ if (smp->data.u.str.data && ((var_available && tmp.data.u.str.data) || arg_p[2].data.str.data)) { max = arg_p[0].data.str.data; if (max > tmpbuf->size - 1 - tmpbuf->data) max = tmpbuf->size - 1 - tmpbuf->data; if (max) { memcpy(tmpbuf->area + tmpbuf->data, arg_p[0].data.str.area, max); tmpbuf->data += max; tmpbuf->area[tmpbuf->data] = 0; } } /* Append variable contents if variable is found and turned into string. */ if (var_available) { max = tmp.data.u.str.data; if (max > tmpbuf->size - 1 - tmpbuf->data) max = tmpbuf->size - 1 - tmpbuf->data; if (max) { memcpy(tmpbuf->area + tmpbuf->data, tmp.data.u.str.area, max); tmpbuf->data += max; tmpbuf->area[tmpbuf->data] = 0; } } /* Append optional suffix. */ max = arg_p[2].data.str.data; if (max > tmpbuf->size - 1 - tmpbuf->data) max = tmpbuf->size - 1 - tmpbuf->data; if (max) { memcpy(tmpbuf->area + tmpbuf->data, arg_p[2].data.str.area, max); tmpbuf->data += max; tmpbuf->area[tmpbuf->data] = 0; } smp->data.u.str = *tmpbuf; smp->data.type = SMP_T_STR; smp_dup(smp); free_trash_chunk(tmpbuf); return 1; } /* Check the "add_item" converter's arguments and extracts the * variable name and its scope. */ static int smp_check_add_item(struct arg *args, struct sample_conv *conv, const char *file, int line, char **err) { /* Try to decode a variable. */ if (args[1].data.str.data > 0 && !vars_check_arg(&args[1], NULL)) { memprintf(err, "failed to register variable name '%s'", args[1].data.str.area); return 0; } if (args[1].data.str.data == 0 && args[2].data.str.data == 0) { memprintf(err, "one of the optional arguments has to be nonempty"); return 0; } return 1; } /* Compares string with a variable containing a string. Return value * is compatible with strcmp(3)'s return value. */ static int sample_conv_strcmp(const struct arg *arg_p, struct sample *smp, void *private) { struct sample tmp; int max, result; smp_set_owner(&tmp, smp->px, smp->sess, smp->strm, smp->opt); if (arg_p[0].type != ARGT_VAR) return 0; if (!sample_conv_var2smp(&arg_p[0].data.var, &tmp, SMP_T_STR)) return 0; max = MIN(smp->data.u.str.data, tmp.data.u.str.data); result = strncmp(smp->data.u.str.area, tmp.data.u.str.area, max); if (result == 0) { if (smp->data.u.str.data != tmp.data.u.str.data) { if (smp->data.u.str.data < tmp.data.u.str.data) { result = -1; } else { result = 1; } } } smp->data.u.sint = result; smp->data.type = SMP_T_SINT; return 1; } /* * This converter can takes a Host header value as defined by rfc9110#section-7.2 * Host = uri-host [ ":" port ] ; * It returns the uri-host value in lowecase with the port stripped. */ static int sample_conv_host_only(const struct arg *arg_p, struct sample *smp, void *private) { /* Working cases: hostname00, hostname00:80, 127.0.0.1, 127.0.0.1:80, [::1], [::1]:80 */ char *beg = smp->data.u.str.area; char *end = smp->data.u.str.area + smp->data.u.str.data - 1; char *p; for (p = end; p >= beg; p--) { if (*p == ':' || *p == ']') break; } if (p >= beg && *p == ':') smp->data.u.str.data = p - beg; /* if no port part was found, the hostname is the whole string */ smp->data.type = SMP_T_STR; return sample_conv_str2lower(arg_p, smp, NULL); } /* * This converter can takes a Host header value as defined by rfc9110#section-7.2 * Host = uri-host [ ":" port ] ; * It returns the port value as a int. */ static int sample_conv_port_only(const struct arg *arg_p, struct sample *smp, void *private) { /* Working cases: hostname00, hostname00:80, 127.0.0.1, 127.0.0.1:80, [::1], [::1]:80 */ char *beg = smp->data.u.str.area; char *end = smp->data.u.str.area + smp->data.u.str.data - 1; char *p; for (p = end; p >= beg; p--) { if (*p == ':' || *p == ']') break; } smp->data.type = SMP_T_SINT; if (p >= beg && *p == ':' && ++p <= end) { smp->data.u.sint = strl2ui(p, smp->data.u.str.data + smp->data.u.str.area - p); } else { smp->data.u.sint = 0; } return 1; } /* Takes a boolean as input. Returns the first argument if that boolean is true and * the second argument otherwise. */ static int sample_conv_iif(const struct arg *arg_p, struct sample *smp, void *private) { smp->data.type = SMP_T_STR; smp->flags |= SMP_F_CONST; if (smp->data.u.sint) { smp->data.u.str.data = arg_p[0].data.str.data; smp->data.u.str.area = arg_p[0].data.str.area; } else { smp->data.u.str.data = arg_p[1].data.str.data; smp->data.u.str.area = arg_p[1].data.str.area; } return 1; } #define GRPC_MSG_COMPRESS_FLAG_SZ 1 /* 1 byte */ #define GRPC_MSG_LENGTH_SZ 4 /* 4 bytes */ #define GRPC_MSG_HEADER_SZ (GRPC_MSG_COMPRESS_FLAG_SZ + GRPC_MSG_LENGTH_SZ) /* * Extract the field value of an input binary sample. Takes a mandatory argument: * the protocol buffers field identifier (dotted notation) internally represented * as an array of unsigned integers and its size. * Return 1 if the field was found, 0 if not. */ static int sample_conv_ungrpc(const struct arg *arg_p, struct sample *smp, void *private) { unsigned char *pos; size_t grpc_left; pos = (unsigned char *)smp->data.u.str.area; grpc_left = smp->data.u.str.data; while (grpc_left > GRPC_MSG_HEADER_SZ) { size_t grpc_msg_len, left; grpc_msg_len = left = ntohl(*(uint32_t *)(pos + GRPC_MSG_COMPRESS_FLAG_SZ)); pos += GRPC_MSG_HEADER_SZ; grpc_left -= GRPC_MSG_HEADER_SZ; if (grpc_left < left) return 0; if (protobuf_field_lookup(arg_p, smp, &pos, &left)) return 1; grpc_left -= grpc_msg_len; } return 0; } static int sample_conv_protobuf(const struct arg *arg_p, struct sample *smp, void *private) { unsigned char *pos; size_t left; pos = (unsigned char *)smp->data.u.str.area; left = smp->data.u.str.data; return protobuf_field_lookup(arg_p, smp, &pos, &left); } static int sample_conv_protobuf_check(struct arg *args, struct sample_conv *conv, const char *file, int line, char **err) { if (!args[1].type) { args[1].type = ARGT_SINT; args[1].data.sint = PBUF_T_BINARY; } else { int pbuf_type; pbuf_type = protobuf_type(args[1].data.str.area); if (pbuf_type == -1) { memprintf(err, "Wrong protocol buffer type '%s'", args[1].data.str.area); return 0; } chunk_destroy(&args[1].data.str); args[1].type = ARGT_SINT; args[1].data.sint = pbuf_type; } return 1; } /* * Extract the tag value of an input binary sample. Takes a mandatory argument: * the FIX protocol tag identifier. * Return 1 if the tag was found, 0 if not. */ static int sample_conv_fix_tag_value(const struct arg *arg_p, struct sample *smp, void *private) { struct ist value; smp->flags &= ~SMP_F_MAY_CHANGE; value = fix_tag_value(ist2(smp->data.u.str.area, smp->data.u.str.data), arg_p[0].data.sint); if (!istlen(value)) { if (isttest(value)) { /* value != IST_NULL, need more data */ smp->flags |= SMP_F_MAY_CHANGE; } return 0; } smp->data.u.str = ist2buf(value); smp->flags |= SMP_F_CONST; return 1; } /* This function checks the "fix_tag_value" converter configuration. * It expects a "known" (by HAProxy) tag name or ID. * Tag string names are converted to their ID counterpart because this is the * format they are sent over the wire. */ static int sample_conv_fix_value_check(struct arg *args, struct sample_conv *conv, const char *file, int line, char **err) { struct ist str; unsigned int tag; str = ist2(args[0].data.str.area, args[0].data.str.data); tag = fix_tagid(str); if (!tag) { memprintf(err, "Unknown FIX tag name '%s'", args[0].data.str.area); return 0; } chunk_destroy(&args[0].data.str); args[0].type = ARGT_SINT; args[0].data.sint = tag; return 1; } /* * Checks that a buffer contains a valid FIX message * * Return 1 if the check could be run, 0 if not. * The result of the analyse itself is stored in as a boolean */ static int sample_conv_fix_is_valid(const struct arg *arg_p, struct sample *smp, void *private) { struct ist msg; msg = ist2(smp->data.u.str.area, smp->data.u.str.data); smp->flags &= ~SMP_F_MAY_CHANGE; switch (fix_validate_message(msg)) { case FIX_VALID_MESSAGE: smp->data.type = SMP_T_BOOL; smp->data.u.sint = 1; return 1; case FIX_NEED_MORE_DATA: smp->flags |= SMP_F_MAY_CHANGE; return 0; case FIX_INVALID_MESSAGE: smp->data.type = SMP_T_BOOL; smp->data.u.sint = 0; return 1; } return 0; } /* * Extract the field value of an input binary sample containing an MQTT packet. * Takes 2 mandatory arguments: * - packet type * - field name * * return 1 if the field was found, 0 if not. */ static int sample_conv_mqtt_field_value(const struct arg *arg_p, struct sample *smp, void *private) { struct ist pkt, value; int type, fieldname_id; pkt = ist2(smp->data.u.str.area, smp->data.u.str.data); type = arg_p[0].data.sint; fieldname_id = arg_p[1].data.sint; smp->flags &= ~SMP_F_MAY_CHANGE; value = mqtt_field_value(pkt, type, fieldname_id); if (!istlen(value)) { if (isttest(value)) { /* value != IST_NULL, need more data */ smp->flags |= SMP_F_MAY_CHANGE; } return 0; } smp->data.u.str = ist2buf(value); smp->flags |= SMP_F_CONST; return 1; } /* * this function checks the "mqtt_field_value" converter configuration. * It expects a known packet type name or ID and a field name, in this order * * Args[0] will be turned into a MQTT_CPT_* value for direct matching when parsing * a packet. */ static int sample_conv_mqtt_field_value_check(struct arg *args, struct sample_conv *conv, const char *file, int line, char **err) { int type, fieldname_id; /* check the MQTT packet type is valid */ type = mqtt_typeid(ist2(args[0].data.str.area, args[0].data.str.data)); if (type == MQTT_CPT_INVALID) { memprintf(err, "Unknown MQTT type '%s'", args[0].data.str.area); return 0; } /* check the field name belongs to the MQTT packet type */ fieldname_id = mqtt_check_type_fieldname(type, ist2(args[1].data.str.area, args[1].data.str.data)); if (fieldname_id == MQTT_FN_INVALID) { memprintf(err, "Unknown MQTT field name '%s' for packet type '%s'", args[1].data.str.area, args[0].data.str.area); return 0; } /* save numeric counterparts of type and field name */ chunk_destroy(&args[0].data.str); chunk_destroy(&args[1].data.str); args[0].type = ARGT_SINT; args[0].data.sint = type; args[1].type = ARGT_SINT; args[1].data.sint = fieldname_id; return 1; } /* * Checks that contains a valid MQTT message * * The function returns 1 if the check was run to its end, 0 otherwise. * The result of the analyse itself is stored in as a boolean. */ static int sample_conv_mqtt_is_valid(const struct arg *arg_p, struct sample *smp, void *private) { struct ist msg; msg = ist2(smp->data.u.str.area, smp->data.u.str.data); smp->flags &= ~SMP_F_MAY_CHANGE; switch (mqtt_validate_message(msg, NULL)) { case FIX_VALID_MESSAGE: smp->data.type = SMP_T_BOOL; smp->data.u.sint = 1; return 1; case FIX_NEED_MORE_DATA: smp->flags |= SMP_F_MAY_CHANGE; return 0; case FIX_INVALID_MESSAGE: smp->data.type = SMP_T_BOOL; smp->data.u.sint = 0; return 1; } return 0; } /* This function checks the "strcmp" converter's arguments and extracts the * variable name and its scope. */ static int smp_check_strcmp(struct arg *args, struct sample_conv *conv, const char *file, int line, char **err) { if (!args[0].data.str.data) { memprintf(err, "missing variable name"); return 0; } /* Try to decode a variable. */ if (vars_check_arg(&args[0], NULL)) return 1; memprintf(err, "failed to register variable name '%s'", args[0].data.str.area); return 0; } /**/ static int sample_conv_htonl(const struct arg *arg_p, struct sample *smp, void *private) { struct buffer *tmp; uint32_t n; n = htonl((uint32_t)smp->data.u.sint); tmp = get_trash_chunk(); memcpy(b_head(tmp), &n, 4); b_add(tmp, 4); smp->data.u.str = *tmp; smp->data.type = SMP_T_BIN; return 1; } /**/ static int sample_conv_cut_crlf(const struct arg *arg_p, struct sample *smp, void *private) { char *p; size_t l; p = smp->data.u.str.area; for (l = 0; l < smp->data.u.str.data; l++) { if (*(p+l) == '\r' || *(p+l) == '\n') break; } smp->data.u.str.data = l; return 1; } /**/ static int sample_conv_ltrim(const struct arg *arg_p, struct sample *smp, void *private) { char *delimiters, *p; size_t dlen, l; delimiters = arg_p[0].data.str.area; dlen = arg_p[0].data.str.data; l = smp->data.u.str.data; p = smp->data.u.str.area; while (l && memchr(delimiters, *p, dlen) != NULL) { p++; l--; } smp->data.u.str.area = p; smp->data.u.str.data = l; return 1; } /**/ static int sample_conv_rtrim(const struct arg *arg_p, struct sample *smp, void *private) { char *delimiters, *p; size_t dlen, l; delimiters = arg_p[0].data.str.area; dlen = arg_p[0].data.str.data; l = smp->data.u.str.data; p = smp->data.u.str.area + l - 1; while (l && memchr(delimiters, *p, dlen) != NULL) { p--; l--; } smp->data.u.str.data = l; return 1; } /* This function checks the "json_query" converter's arguments. */ static int sample_check_json_query(struct arg *arg, struct sample_conv *conv, const char *file, int line, char **err) { if (arg[0].data.str.data == 0) { memprintf(err, "json_path must not be empty"); return 0; } if (arg[1].data.str.data != 0) { if (strcmp(arg[1].data.str.area, "int") != 0) { memprintf(err, "output_type only supports \"int\" as argument"); return 0; } else { arg[1].type = ARGT_SINT; arg[1].data.sint = 0; } } return 1; } /* Limit JSON integer values to the range [-(2**53)+1, (2**53)-1] as per * the recommendation for interoperable integers in section 6 of RFC 7159. */ #define JSON_INT_MAX ((1LL << 53) - 1) #define JSON_INT_MIN (-JSON_INT_MAX) /* This sample function get the value from a given json string. * The mjson library is used to parse the JSON struct */ static int sample_conv_json_query(const struct arg *args, struct sample *smp, void *private) { struct buffer *trash = get_trash_chunk(); const char *token; /* holds the temporary string from mjson_find */ int token_size; /* holds the length of */ enum mjson_tok token_type; token_type = mjson_find(smp->data.u.str.area, smp->data.u.str.data, args[0].data.str.area, &token, &token_size); switch (token_type) { case MJSON_TOK_NUMBER: if (args[1].type == ARGT_SINT) { smp->data.u.sint = strtoll(token, NULL, 0); if (smp->data.u.sint < JSON_INT_MIN || smp->data.u.sint > JSON_INT_MAX) return 0; smp->data.type = SMP_T_SINT; return 1; } else { double double_val; if (mjson_get_number(smp->data.u.str.area, smp->data.u.str.data, args[0].data.str.area, &double_val) == 0) return 0; trash->data = snprintf(trash->area,trash->size,"%g",double_val); smp->data.u.str = *trash; smp->data.type = SMP_T_STR; return 1; } case MJSON_TOK_TRUE: smp->data.type = SMP_T_BOOL; smp->data.u.sint = 1; return 1; case MJSON_TOK_FALSE: smp->data.type = SMP_T_BOOL; smp->data.u.sint = 0; return 1; case MJSON_TOK_STRING: { int len; len = mjson_get_string(smp->data.u.str.area, smp->data.u.str.data, args[0].data.str.area, trash->area, trash->size); if (len == -1) { /* invalid string */ return 0; } trash->data = len; smp->data.u.str = *trash; smp->data.type = SMP_T_STR; return 1; } case MJSON_TOK_NULL: case MJSON_TOK_ARRAY: case MJSON_TOK_OBJECT: /* We cannot handle these. */ return 0; case MJSON_TOK_INVALID: /* Nothing matches the query. */ return 0; case MJSON_TOK_KEY: /* This is not a valid return value according to the * mjson documentation, but we handle it to benefit * from '-Wswitch'. */ return 0; } my_unreachable(); return 0; } #ifdef USE_OPENSSL static int sample_conv_jwt_verify_check(struct arg *args, struct sample_conv *conv, const char *file, int line, char **err) { vars_check_arg(&args[0], NULL); vars_check_arg(&args[1], NULL); if (args[0].type == ARGT_STR) { enum jwt_alg alg = jwt_parse_alg(args[0].data.str.area, args[0].data.str.data); switch(alg) { case JWT_ALG_DEFAULT: memprintf(err, "unknown JWT algorithm: %s", args[0].data.str.area); return 0; case JWS_ALG_PS256: case JWS_ALG_PS384: case JWS_ALG_PS512: memprintf(err, "RSASSA-PSS JWS signing not managed yet"); return 0; default: break; } } if (args[1].type == ARGT_STR) { jwt_tree_load_cert(args[1].data.str.area, args[1].data.str.data, err); } return 1; } /* Check that a JWT's signature is correct */ static int sample_conv_jwt_verify(const struct arg *args, struct sample *smp, void *private) { struct sample alg_smp, key_smp; smp->data.type = SMP_T_SINT; smp->data.u.sint = 0; smp_set_owner(&alg_smp, smp->px, smp->sess, smp->strm, smp->opt); smp_set_owner(&key_smp, smp->px, smp->sess, smp->strm, smp->opt); if (!sample_conv_var2smp_str(&args[0], &alg_smp)) return 0; if (!sample_conv_var2smp_str(&args[1], &key_smp)) return 0; smp->data.u.sint = jwt_verify(&smp->data.u.str, &alg_smp.data.u.str, &key_smp.data.u.str); return 1; } /* * Returns the decoded header or payload of a JWT if no parameter is given, or * the value of the specified field of the corresponding JWT subpart if a * parameter is given. */ static int sample_conv_jwt_member_query(const struct arg *args, struct sample *smp, void *private, enum jwt_elt member) { struct jwt_item items[JWT_ELT_MAX] = { { 0 } }; unsigned int item_num = member + 1; /* We don't need to tokenize the full token */ struct buffer *decoded_header = get_trash_chunk(); int retval = 0; int ret; jwt_tokenize(&smp->data.u.str, items, &item_num); if (item_num < member + 1) goto end; ret = base64urldec(items[member].start, items[member].length, decoded_header->area, decoded_header->size); if (ret == -1) goto end; decoded_header->data = ret; if (args[0].type != ARGT_STR) { smp->data.u.str = *decoded_header; smp->data.type = SMP_T_STR; goto end; } /* We look for a specific field of the header or payload part of the JWT */ smp->data.u.str = *decoded_header; retval = sample_conv_json_query(args, smp, private); end: return retval; } /* This function checks the "jwt_header_query" and "jwt_payload_query" converters' arguments. * It is based on the "json_query" converter's check with the only difference * being that the jwt converters can take 0 parameters as well. */ static int sample_conv_jwt_query_check(struct arg *arg, struct sample_conv *conv, const char *file, int line, char **err) { if (arg[1].data.str.data != 0) { if (strcmp(arg[1].data.str.area, "int") != 0) { memprintf(err, "output_type only supports \"int\" as argument"); return 0; } else { arg[1].type = ARGT_SINT; arg[1].data.sint = 0; } } return 1; } /* * If no parameter is given, return the decoded header part of a JWT (the first * base64 encoded part, corresponding to the JOSE header). * If a parameter is given, this converter acts as a "json_query" on this * decoded JSON. */ static int sample_conv_jwt_header_query(const struct arg *args, struct sample *smp, void *private) { return sample_conv_jwt_member_query(args, smp, private, JWT_ELT_JOSE); } /* * If no parameter is given, return the decoded payload part of a JWT (the * second base64 encoded part, which contains all the claims). If a parameter * is given, this converter acts as a "json_query" on this decoded JSON. */ static int sample_conv_jwt_payload_query(const struct arg *args, struct sample *smp, void *private) { return sample_conv_jwt_member_query(args, smp, private, JWT_ELT_CLAIMS); } #endif /* USE_OPENSSL */ /************************************************************************/ /* All supported sample fetch functions must be declared here */ /************************************************************************/ /* force TRUE to be returned at the fetch level */ static int smp_fetch_true(const struct arg *args, struct sample *smp, const char *kw, void *private) { if (!smp_make_rw(smp)) return 0; smp->data.type = SMP_T_BOOL; smp->data.u.sint = 1; return 1; } /* force FALSE to be returned at the fetch level */ static int smp_fetch_false(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->data.type = SMP_T_BOOL; smp->data.u.sint = 0; return 1; } /* retrieve environment variable $1 as a string */ static int smp_fetch_env(const struct arg *args, struct sample *smp, const char *kw, void *private) { char *env; if (args[0].type != ARGT_STR) return 0; env = getenv(args[0].data.str.area); if (!env) return 0; smp->data.type = SMP_T_STR; smp->flags = SMP_F_CONST; smp->data.u.str.area = env; smp->data.u.str.data = strlen(env); return 1; } /* Validates the data unit argument passed to "date" fetch. Argument 1 support an * optional string representing the unit of the result: "s" for seconds, "ms" for * milliseconds and "us" for microseconds. * Returns 0 on error and non-zero if OK. */ int smp_check_date_unit(struct arg *args, char **err) { if (args[1].type == ARGT_STR) { long long int unit; if (strcmp(args[1].data.str.area, "s") == 0) { unit = TIME_UNIT_S; } else if (strcmp(args[1].data.str.area, "ms") == 0) { unit = TIME_UNIT_MS; } else if (strcmp(args[1].data.str.area, "us") == 0) { unit = TIME_UNIT_US; } else { memprintf(err, "expects 's', 'ms' or 'us', got '%s'", args[1].data.str.area); return 0; } chunk_destroy(&args[1].data.str); args[1].type = ARGT_SINT; args[1].data.sint = unit; } else if (args[1].type != ARGT_STOP) { memprintf(err, "Unexpected arg type"); return 0; } return 1; } /* retrieve the current local date in epoch time, converts it to milliseconds * or microseconds if asked to in optional args[1] unit param, and applies an * optional args[0] offset. */ static int smp_fetch_date(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->data.u.sint = date.tv_sec; /* report in milliseconds */ if (args[1].type == ARGT_SINT && args[1].data.sint == TIME_UNIT_MS) { smp->data.u.sint *= 1000; smp->data.u.sint += date.tv_usec / 1000; } /* report in microseconds */ else if (args[1].type == ARGT_SINT && args[1].data.sint == TIME_UNIT_US) { smp->data.u.sint *= 1000000; smp->data.u.sint += date.tv_usec; } /* add offset */ if (args[0].type == ARGT_SINT) smp->data.u.sint += args[0].data.sint; smp->data.type = SMP_T_SINT; smp->flags |= SMP_F_VOL_TEST | SMP_F_MAY_CHANGE; return 1; } /* retrieve the current microsecond part of the date */ static int smp_fetch_date_us(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->data.u.sint = date.tv_usec; smp->data.type = SMP_T_SINT; smp->flags |= SMP_F_VOL_TEST | SMP_F_MAY_CHANGE; return 1; } /* returns the hostname */ static int smp_fetch_hostname(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->data.type = SMP_T_STR; smp->flags = SMP_F_CONST; smp->data.u.str.area = hostname; smp->data.u.str.data = strlen(hostname); return 1; } /* returns the number of processes */ static int smp_fetch_nbproc(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->data.type = SMP_T_SINT; smp->data.u.sint = 1; return 1; } /* returns the number of the current process (between 1 and nbproc */ static int smp_fetch_proc(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->data.type = SMP_T_SINT; smp->data.u.sint = 1; return 1; } /* returns the number of the current thread (between 1 and nbthread */ static int smp_fetch_thread(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->data.type = SMP_T_SINT; smp->data.u.sint = tid; return 1; } /* generate a random 32-bit integer for whatever purpose, with an optional * range specified in argument. */ static int smp_fetch_rand(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->data.u.sint = ha_random32(); /* reduce if needed. Don't do a modulo, use all bits! */ if (args[0].type == ARGT_SINT) smp->data.u.sint = ((u64)smp->data.u.sint * (u64)args[0].data.sint) >> 32; smp->data.type = SMP_T_SINT; smp->flags |= SMP_F_VOL_TEST | SMP_F_MAY_CHANGE; return 1; } /* returns true if the current process is stopping */ static int smp_fetch_stopping(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->data.type = SMP_T_BOOL; smp->data.u.sint = stopping; return 1; } /* returns the number of calls of the current stream's process_stream() */ static int smp_fetch_cpu_calls(const struct arg *args, struct sample *smp, const char *kw, void *private) { if (!smp->strm) return 0; smp->data.type = SMP_T_SINT; smp->data.u.sint = smp->strm->task->calls; return 1; } /* returns the average number of nanoseconds spent processing the stream per call */ static int smp_fetch_cpu_ns_avg(const struct arg *args, struct sample *smp, const char *kw, void *private) { if (!smp->strm) return 0; smp->data.type = SMP_T_SINT; smp->data.u.sint = smp->strm->task->calls ? smp->strm->task->cpu_time / smp->strm->task->calls : 0; return 1; } /* returns the total number of nanoseconds spent processing the stream */ static int smp_fetch_cpu_ns_tot(const struct arg *args, struct sample *smp, const char *kw, void *private) { if (!smp->strm) return 0; smp->data.type = SMP_T_SINT; smp->data.u.sint = smp->strm->task->cpu_time; return 1; } /* returns the average number of nanoseconds per call spent waiting for other tasks to be processed */ static int smp_fetch_lat_ns_avg(const struct arg *args, struct sample *smp, const char *kw, void *private) { if (!smp->strm) return 0; smp->data.type = SMP_T_SINT; smp->data.u.sint = smp->strm->task->calls ? smp->strm->task->lat_time / smp->strm->task->calls : 0; return 1; } /* returns the total number of nanoseconds per call spent waiting for other tasks to be processed */ static int smp_fetch_lat_ns_tot(const struct arg *args, struct sample *smp, const char *kw, void *private) { if (!smp->strm) return 0; smp->data.type = SMP_T_SINT; smp->data.u.sint = smp->strm->task->lat_time; return 1; } static int smp_fetch_const_str(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->flags |= SMP_F_CONST; smp->data.type = SMP_T_STR; smp->data.u.str.area = args[0].data.str.area; smp->data.u.str.data = args[0].data.str.data; return 1; } static int smp_check_const_bool(struct arg *args, char **err) { if (strcasecmp(args[0].data.str.area, "true") == 0 || strcasecmp(args[0].data.str.area, "1") == 0) { chunk_destroy(&args[0].data.str); args[0].type = ARGT_SINT; args[0].data.sint = 1; return 1; } if (strcasecmp(args[0].data.str.area, "false") == 0 || strcasecmp(args[0].data.str.area, "0") == 0) { chunk_destroy(&args[0].data.str); args[0].type = ARGT_SINT; args[0].data.sint = 0; return 1; } memprintf(err, "Expects 'true', 'false', '0' or '1'"); return 0; } static int smp_fetch_const_bool(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->data.type = SMP_T_BOOL; smp->data.u.sint = args[0].data.sint; return 1; } static int smp_fetch_const_int(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->data.type = SMP_T_SINT; smp->data.u.sint = args[0].data.sint; return 1; } static int smp_fetch_const_ipv4(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->data.type = SMP_T_IPV4; smp->data.u.ipv4 = args[0].data.ipv4; return 1; } static int smp_fetch_const_ipv6(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->data.type = SMP_T_IPV6; smp->data.u.ipv6 = args[0].data.ipv6; return 1; } static int smp_check_const_bin(struct arg *args, char **err) { char *binstr = NULL; int binstrlen; if (!parse_binary(args[0].data.str.area, &binstr, &binstrlen, err)) return 0; chunk_destroy(&args[0].data.str); args[0].type = ARGT_STR; args[0].data.str.area = binstr; args[0].data.str.data = binstrlen; return 1; } static int smp_fetch_const_bin(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->flags |= SMP_F_CONST; smp->data.type = SMP_T_BIN; smp->data.u.str.area = args[0].data.str.area; smp->data.u.str.data = args[0].data.str.data; return 1; } static int smp_check_const_meth(struct arg *args, char **err) { enum http_meth_t meth; int i; meth = find_http_meth(args[0].data.str.area, args[0].data.str.data); if (meth != HTTP_METH_OTHER) { chunk_destroy(&args[0].data.str); args[0].type = ARGT_SINT; args[0].data.sint = meth; } else { /* Check method avalaibility. A method is a token defined as : * tchar = "!" / "#" / "$" / "%" / "&" / "'" / "*" / "+" / "-" / "." / * "^" / "_" / "`" / "|" / "~" / DIGIT / ALPHA * token = 1*tchar */ for (i = 0; i < args[0].data.str.data; i++) { if (!HTTP_IS_TOKEN(args[0].data.str.area[i])) { memprintf(err, "expects valid method."); return 0; } } } return 1; } static int smp_fetch_const_meth(const struct arg *args, struct sample *smp, const char *kw, void *private) { smp->data.type = SMP_T_METH; if (args[0].type == ARGT_SINT) { smp->flags &= ~SMP_F_CONST; smp->data.u.meth.meth = args[0].data.sint; smp->data.u.meth.str.area = ""; smp->data.u.meth.str.data = 0; } else { smp->flags |= SMP_F_CONST; smp->data.u.meth.meth = HTTP_METH_OTHER; smp->data.u.meth.str.area = args[0].data.str.area; smp->data.u.meth.str.data = args[0].data.str.data; } return 1; } // This function checks the "uuid" sample's arguments. // Function won't get called when no parameter is specified (maybe a bug?) static int smp_check_uuid(struct arg *args, char **err) { if (!args[0].type) { args[0].type = ARGT_SINT; args[0].data.sint = 4; } else if (args[0].data.sint != 4) { memprintf(err, "Unsupported UUID version: '%lld'", args[0].data.sint); return 0; } return 1; } // Generate a RFC4122 UUID (default is v4 = fully random) static int smp_fetch_uuid(const struct arg *args, struct sample *smp, const char *kw, void *private) { if (args[0].data.sint == 4 || !args[0].type) { ha_generate_uuid(&trash); smp->data.type = SMP_T_STR; smp->flags = SMP_F_VOL_TEST | SMP_F_MAY_CHANGE; smp->data.u.str = trash; return 1; } // more implementations of other uuid formats possible here return 0; } /* Note: must not be declared as its list will be overwritten. * Note: fetches that may return multiple types must be declared as the lowest * common denominator, the type that can be casted into all other ones. For * instance IPv4/IPv6 must be declared IPv4. */ static struct sample_fetch_kw_list smp_kws = {ILH, { { "always_false", smp_fetch_false, 0, NULL, SMP_T_BOOL, SMP_USE_CONST }, { "always_true", smp_fetch_true, 0, NULL, SMP_T_BOOL, SMP_USE_CONST }, { "env", smp_fetch_env, ARG1(1,STR), NULL, SMP_T_STR, SMP_USE_CONST }, { "date", smp_fetch_date, ARG2(0,SINT,STR), smp_check_date_unit, SMP_T_SINT, SMP_USE_CONST }, { "date_us", smp_fetch_date_us, 0, NULL, SMP_T_SINT, SMP_USE_CONST }, { "hostname", smp_fetch_hostname, 0, NULL, SMP_T_STR, SMP_USE_CONST }, { "nbproc", smp_fetch_nbproc,0, NULL, SMP_T_SINT, SMP_USE_CONST }, { "proc", smp_fetch_proc, 0, NULL, SMP_T_SINT, SMP_USE_CONST }, { "thread", smp_fetch_thread, 0, NULL, SMP_T_SINT, SMP_USE_CONST }, { "rand", smp_fetch_rand, ARG1(0,SINT), NULL, SMP_T_SINT, SMP_USE_CONST }, { "stopping", smp_fetch_stopping, 0, NULL, SMP_T_BOOL, SMP_USE_INTRN }, { "uuid", smp_fetch_uuid, ARG1(0, SINT), smp_check_uuid, SMP_T_STR, SMP_USE_CONST }, { "cpu_calls", smp_fetch_cpu_calls, 0, NULL, SMP_T_SINT, SMP_USE_INTRN }, { "cpu_ns_avg", smp_fetch_cpu_ns_avg, 0, NULL, SMP_T_SINT, SMP_USE_INTRN }, { "cpu_ns_tot", smp_fetch_cpu_ns_tot, 0, NULL, SMP_T_SINT, SMP_USE_INTRN }, { "lat_ns_avg", smp_fetch_lat_ns_avg, 0, NULL, SMP_T_SINT, SMP_USE_INTRN }, { "lat_ns_tot", smp_fetch_lat_ns_tot, 0, NULL, SMP_T_SINT, SMP_USE_INTRN }, { "str", smp_fetch_const_str, ARG1(1,STR), NULL , SMP_T_STR, SMP_USE_CONST }, { "bool", smp_fetch_const_bool, ARG1(1,STR), smp_check_const_bool, SMP_T_BOOL, SMP_USE_CONST }, { "int", smp_fetch_const_int, ARG1(1,SINT), NULL , SMP_T_SINT, SMP_USE_CONST }, { "ipv4", smp_fetch_const_ipv4, ARG1(1,IPV4), NULL , SMP_T_IPV4, SMP_USE_CONST }, { "ipv6", smp_fetch_const_ipv6, ARG1(1,IPV6), NULL , SMP_T_IPV6, SMP_USE_CONST }, { "bin", smp_fetch_const_bin, ARG1(1,STR), smp_check_const_bin , SMP_T_BIN, SMP_USE_CONST }, { "meth", smp_fetch_const_meth, ARG1(1,STR), smp_check_const_meth, SMP_T_METH, SMP_USE_CONST }, { /* END */ }, }}; INITCALL1(STG_REGISTER, sample_register_fetches, &smp_kws); /* Note: must not be declared as its list will be overwritten */ static struct sample_conv_kw_list sample_conv_kws = {ILH, { { "add_item",sample_conv_add_item, ARG3(2,STR,STR,STR), smp_check_add_item, SMP_T_STR, SMP_T_STR }, { "debug", sample_conv_debug, ARG2(0,STR,STR), smp_check_debug, SMP_T_ANY, SMP_T_ANY }, { "b64dec", sample_conv_base642bin, 0, NULL, SMP_T_STR, SMP_T_BIN }, { "base64", sample_conv_bin2base64, 0, NULL, SMP_T_BIN, SMP_T_STR }, { "concat", sample_conv_concat, ARG3(1,STR,STR,STR), smp_check_concat, SMP_T_STR, SMP_T_STR }, { "ub64enc", sample_conv_bin2base64url,0, NULL, SMP_T_BIN, SMP_T_STR }, { "ub64dec", sample_conv_base64url2bin,0, NULL, SMP_T_STR, SMP_T_BIN }, { "upper", sample_conv_str2upper, 0, NULL, SMP_T_STR, SMP_T_STR }, { "lower", sample_conv_str2lower, 0, NULL, SMP_T_STR, SMP_T_STR }, { "length", sample_conv_length, 0, NULL, SMP_T_STR, SMP_T_SINT }, { "be2dec", sample_conv_be2dec, ARG3(1,STR,SINT,SINT), sample_conv_be2dec_check, SMP_T_BIN, SMP_T_STR }, { "be2hex", sample_conv_be2hex, ARG3(1,STR,SINT,SINT), sample_conv_be2hex_check, SMP_T_BIN, SMP_T_STR }, { "hex", sample_conv_bin2hex, 0, NULL, SMP_T_BIN, SMP_T_STR }, { "hex2i", sample_conv_hex2int, 0, NULL, SMP_T_STR, SMP_T_SINT }, { "ipmask", sample_conv_ipmask, ARG2(1,MSK4,MSK6), NULL, SMP_T_ADDR, SMP_T_IPV4 }, { "ltime", sample_conv_ltime, ARG2(1,STR,SINT), NULL, SMP_T_SINT, SMP_T_STR }, { "utime", sample_conv_utime, ARG2(1,STR,SINT), NULL, SMP_T_SINT, SMP_T_STR }, { "crc32", sample_conv_crc32, ARG1(0,SINT), NULL, SMP_T_BIN, SMP_T_SINT }, { "crc32c", sample_conv_crc32c, ARG1(0,SINT), NULL, SMP_T_BIN, SMP_T_SINT }, { "djb2", sample_conv_djb2, ARG1(0,SINT), NULL, SMP_T_BIN, SMP_T_SINT }, { "sdbm", sample_conv_sdbm, ARG1(0,SINT), NULL, SMP_T_BIN, SMP_T_SINT }, { "wt6", sample_conv_wt6, ARG1(0,SINT), NULL, SMP_T_BIN, SMP_T_SINT }, { "xxh3", sample_conv_xxh3, ARG1(0,SINT), NULL, SMP_T_BIN, SMP_T_SINT }, { "xxh32", sample_conv_xxh32, ARG1(0,SINT), NULL, SMP_T_BIN, SMP_T_SINT }, { "xxh64", sample_conv_xxh64, ARG1(0,SINT), NULL, SMP_T_BIN, SMP_T_SINT }, { "json", sample_conv_json, ARG1(1,STR), sample_conv_json_check, SMP_T_STR, SMP_T_STR }, { "bytes", sample_conv_bytes, ARG2(1,SINT,SINT), NULL, SMP_T_BIN, SMP_T_BIN }, { "field", sample_conv_field, ARG3(2,SINT,STR,SINT), sample_conv_field_check, SMP_T_STR, SMP_T_STR }, { "word", sample_conv_word, ARG3(2,SINT,STR,SINT), sample_conv_field_check, SMP_T_STR, SMP_T_STR }, { "regsub", sample_conv_regsub, ARG3(2,REG,STR,STR), sample_conv_regsub_check, SMP_T_STR, SMP_T_STR }, { "sha1", sample_conv_sha1, 0, NULL, SMP_T_BIN, SMP_T_BIN }, { "strcmp", sample_conv_strcmp, ARG1(1,STR), smp_check_strcmp, SMP_T_STR, SMP_T_SINT }, { "host_only", sample_conv_host_only, 0, NULL, SMP_T_STR, SMP_T_STR }, { "port_only", sample_conv_port_only, 0, NULL, SMP_T_STR, SMP_T_SINT }, /* gRPC converters. */ { "ungrpc", sample_conv_ungrpc, ARG2(1,PBUF_FNUM,STR), sample_conv_protobuf_check, SMP_T_BIN, SMP_T_BIN }, { "protobuf", sample_conv_protobuf, ARG2(1,PBUF_FNUM,STR), sample_conv_protobuf_check, SMP_T_BIN, SMP_T_BIN }, /* FIX converters */ { "fix_is_valid", sample_conv_fix_is_valid, 0, NULL, SMP_T_BIN, SMP_T_BOOL }, { "fix_tag_value", sample_conv_fix_tag_value, ARG1(1,STR), sample_conv_fix_value_check, SMP_T_BIN, SMP_T_BIN }, /* MQTT converters */ { "mqtt_is_valid", sample_conv_mqtt_is_valid, 0, NULL, SMP_T_BIN, SMP_T_BOOL }, { "mqtt_field_value", sample_conv_mqtt_field_value, ARG2(2,STR,STR), sample_conv_mqtt_field_value_check, SMP_T_BIN, SMP_T_STR }, { "iif", sample_conv_iif, ARG2(2, STR, STR), NULL, SMP_T_BOOL, SMP_T_STR }, { "and", sample_conv_binary_and, ARG1(1,STR), check_operator, SMP_T_SINT, SMP_T_SINT }, { "or", sample_conv_binary_or, ARG1(1,STR), check_operator, SMP_T_SINT, SMP_T_SINT }, { "xor", sample_conv_binary_xor, ARG1(1,STR), check_operator, SMP_T_SINT, SMP_T_SINT }, { "cpl", sample_conv_binary_cpl, 0, NULL, SMP_T_SINT, SMP_T_SINT }, { "bool", sample_conv_arith_bool, 0, NULL, SMP_T_SINT, SMP_T_BOOL }, { "not", sample_conv_arith_not, 0, NULL, SMP_T_SINT, SMP_T_BOOL }, { "odd", sample_conv_arith_odd, 0, NULL, SMP_T_SINT, SMP_T_BOOL }, { "even", sample_conv_arith_even, 0, NULL, SMP_T_SINT, SMP_T_BOOL }, { "add", sample_conv_arith_add, ARG1(1,STR), check_operator, SMP_T_SINT, SMP_T_SINT }, { "sub", sample_conv_arith_sub, ARG1(1,STR), check_operator, SMP_T_SINT, SMP_T_SINT }, { "mul", sample_conv_arith_mul, ARG1(1,STR), check_operator, SMP_T_SINT, SMP_T_SINT }, { "div", sample_conv_arith_div, ARG1(1,STR), check_operator, SMP_T_SINT, SMP_T_SINT }, { "mod", sample_conv_arith_mod, ARG1(1,STR), check_operator, SMP_T_SINT, SMP_T_SINT }, { "neg", sample_conv_arith_neg, 0, NULL, SMP_T_SINT, SMP_T_SINT }, { "htonl", sample_conv_htonl, 0, NULL, SMP_T_SINT, SMP_T_BIN }, { "cut_crlf", sample_conv_cut_crlf, 0, NULL, SMP_T_STR, SMP_T_STR }, { "ltrim", sample_conv_ltrim, ARG1(1,STR), NULL, SMP_T_STR, SMP_T_STR }, { "rtrim", sample_conv_rtrim, ARG1(1,STR), NULL, SMP_T_STR, SMP_T_STR }, { "json_query", sample_conv_json_query, ARG2(1,STR,STR), sample_check_json_query , SMP_T_STR, SMP_T_ANY }, #ifdef USE_OPENSSL /* JSON Web Token converters */ { "jwt_header_query", sample_conv_jwt_header_query, ARG2(0,STR,STR), sample_conv_jwt_query_check, SMP_T_BIN, SMP_T_ANY }, { "jwt_payload_query", sample_conv_jwt_payload_query, ARG2(0,STR,STR), sample_conv_jwt_query_check, SMP_T_BIN, SMP_T_ANY }, { "jwt_verify", sample_conv_jwt_verify, ARG2(2,STR,STR), sample_conv_jwt_verify_check, SMP_T_BIN, SMP_T_SINT }, #endif { NULL, NULL, 0, 0, 0 }, }}; INITCALL1(STG_REGISTER, sample_register_convs, &sample_conv_kws);