diff options
Diffstat (limited to 'addons/ot/src/vars.c')
| -rw-r--r-- | addons/ot/src/vars.c | 834 |
1 files changed, 834 insertions, 0 deletions
diff --git a/addons/ot/src/vars.c b/addons/ot/src/vars.c new file mode 100644 index 0000000..e99bab1 --- /dev/null +++ b/addons/ot/src/vars.c @@ -0,0 +1,834 @@ +/*** + * Copyright 2020 HAProxy Technologies + * + * This file is part of the HAProxy OpenTracing filter. + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +#include "include.h" + + +#ifdef DEBUG_OT + +/*** + * NAME + * flt_ot_vars_scope_dump - + * + * ARGUMENTS + * vars - + * scope - + * + * DESCRIPTION + * Function prints the contents of all variables defined for a particular + * scope. + * + * RETURN VALUE + * This function does not return a value. + */ +static void flt_ot_vars_scope_dump(struct vars *vars, const char *scope) +{ + const struct var *var; + + if (vars == NULL) + return; + + vars_rdlock(vars); + list_for_each_entry(var, &(vars->head), l) + FLT_OT_DBG(2, "'%s.%016" PRIx64 "' -> '%.*s'", scope, var->name_hash, (int)b_data(&(var->data.u.str)), b_orig(&(var->data.u.str))); + vars_rdunlock(vars); +} + + +/*** + * NAME + * flt_ot_vars_dump - + * + * ARGUMENTS + * s - + * + * DESCRIPTION + * Function prints the contents of all variables grouped by individual + * scope. + * + * RETURN VALUE + * This function does not return a value. + */ +void flt_ot_vars_dump(struct stream *s) +{ + FLT_OT_FUNC("%p", s); + + /* + * It would be nice if we could use the get_vars() function from HAProxy + * source here to get the value of the 'vars' pointer, but it is defined + * as 'static inline', so unfortunately none of this is possible. + */ + flt_ot_vars_scope_dump(&(proc_vars), "PROC"); + flt_ot_vars_scope_dump(&(s->sess->vars), "SESS"); + flt_ot_vars_scope_dump(&(s->vars_txn), "TXN"); + flt_ot_vars_scope_dump(&(s->vars_reqres), "REQ/RES"); + + FLT_OT_RETURN(); +} + +#endif /* DEBUG_OT */ + + +/*** + * NAME + * flt_ot_smp_init - + * + * ARGUMENTS + * s - + * smp - + * opt - + * type - + * data - + * + * DESCRIPTION + * The function initializes the value of the 'smp' structure. If the 'data' + * argument is set, then the 'sample_data' member of the 'smp' structure is + * also initialized. + * + * RETURN VALUE + * This function does not return a value. + */ +static inline void flt_ot_smp_init(struct stream *s, struct sample *smp, uint opt, int type, const char *data) +{ + (void)memset(smp, 0, sizeof(*smp)); + (void)smp_set_owner(smp, s->be, s->sess, s, opt | SMP_OPT_FINAL); + + if (data != NULL) { + smp->data.type = type; + + chunk_initstr(&(smp->data.u.str), data); + } +} + + +/*** + * NAME + * flt_ot_smp_add - + * + * ARGUMENTS + * data - + * blk - + * len - + * err - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static int flt_ot_smp_add(struct sample_data *data, const char *name, size_t len, char **err) +{ + bool flag_alloc = 0; + int retval = FLT_OT_RET_ERROR; + + FLT_OT_FUNC("%p, \"%.*s\", %zu, %p:%p", data, (int)len, name, len, FLT_OT_DPTR_ARGS(err)); + + FLT_OT_DBG_BUF(2, &(data->u.str)); + + if (b_orig(&(data->u.str)) == NULL) { + data->type = SMP_T_BIN; + chunk_init(&(data->u.str), FLT_OT_MALLOC(global.tune.bufsize), global.tune.bufsize); + + flag_alloc = (b_orig(&(data->u.str)) != NULL); + } + + if (b_orig(&(data->u.str)) == NULL) { + FLT_OT_ERR("failed to add ctx '%.*s', not enough memory", (int)len, name); + } + else if (len > ((UINT64_C(1) << ((sizeof(FLT_OT_VAR_CTX_SIZE) << 3) - 1)) - 1)) { + FLT_OT_ERR("failed to add ctx '%.*s', too long name", (int)len, name); + } + else if ((len + sizeof(FLT_OT_VAR_CTX_SIZE)) > b_room(&(data->u.str))) { + FLT_OT_ERR("failed to add ctx '%.*s', too many names", (int)len, name); + } + else { + retval = b_data(&(data->u.str)); + + b_putchr(&(data->u.str), len); + (void)__b_putblk(&(data->u.str), name, len); + + FLT_OT_DBG_BUF(2, &(data->u.str)); + } + + if ((retval == FLT_OT_RET_ERROR) && flag_alloc) + FLT_OT_FREE(b_orig(&(data->u.str))); + + FLT_OT_RETURN_INT(retval); +} + + +/*** + * NAME + * flt_ot_normalize_name - + * + * ARGUMENTS + * var_name - + * size - + * len - + * name - + * flag_cpy - + * err - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static int flt_ot_normalize_name(char *var_name, size_t size, int *len, const char *name, bool flag_cpy, char **err) +{ + int retval = 0; + + FLT_OT_FUNC("%p, %zu, %p, \"%s\", %hhu, %p:%p", var_name, size, len, name, flag_cpy, FLT_OT_DPTR_ARGS(err)); + + if (!FLT_OT_STR_ISVALID(name)) + FLT_OT_RETURN_INT(retval); + + /* + * In case the name of the variable consists of several elements, + * the character '.' is added between them. + */ + if ((*len == 0) || (var_name[*len - 1] == '.')) + /* Do nothing. */; + else if (*len < (size - 1)) + var_name[(*len)++] = '.'; + else { + FLT_OT_ERR("failed to normalize variable name, buffer too small"); + + retval = -1; + } + + if (flag_cpy) { + /* Copy variable name without modification. */ + retval = strlen(name); + if ((*len + retval + 1) > size) { + FLT_OT_ERR("failed to normalize variable name, buffer too small"); + + retval = -1; + } else { + (void)memcpy(var_name + *len, name, retval + 1); + + *len += retval; + } + } else { + /* + * HAProxy does not allow the use of variable names containing '-' + * or ' '. This of course applies to HTTP header names as well. + * Also, here the capital letters are converted to lowercase. + */ + while (retval != -1) + if (*len >= (size - 1)) { + FLT_OT_ERR("failed to normalize variable name, buffer too small"); + + retval = -1; + } else { + uint8_t ch = name[retval]; + + if (ch == '\0') + break; + else if (ch == '-') + ch = FLT_OT_VAR_CHAR_DASH; + else if (ch == ' ') + ch = FLT_OT_VAR_CHAR_SPACE; + else if (isupper(ch)) + ch = ist_lc[ch]; + + var_name[(*len)++] = ch; + retval++; + } + + var_name[*len] = '\0'; + } + + FLT_OT_DBG(3, "var_name: \"%s\" %d/%d", var_name, retval, *len); + + if (retval == -1) + *len = retval; + + FLT_OT_RETURN_INT(retval); +} + + +/*** + * NAME + * flt_ot_var_name - + * + * ARGUMENTS + * scope - + * prefix - + * name - + * flag_cpy - + * var_name - + * size - + * err - + * + * DESCRIPTION + * The function initializes the value of the 'smp' structure. If the 'data' + * argument is set, then the 'sample_data' member of the 'smp' structure is + * also initialized. + * + * RETURN VALUE + * - + */ +static int flt_ot_var_name(const char *scope, const char *prefix, const char *name, bool flag_cpy, char *var_name, size_t size, char **err) +{ + int retval = 0; + + FLT_OT_FUNC("\"%s\", \"%s\", \"%s\", %hhu, %p, %zu, %p:%p", scope, prefix, name, flag_cpy, var_name, size, FLT_OT_DPTR_ARGS(err)); + + if (flt_ot_normalize_name(var_name, size, &retval, scope, 0, err) >= 0) + if (flt_ot_normalize_name(var_name, size, &retval, prefix, 0, err) >= 0) + (void)flt_ot_normalize_name(var_name, size, &retval, name, flag_cpy, err); + + if (retval == -1) + FLT_OT_ERR("failed to construct variable name '%s.%s.%s'", scope, prefix, name); + + FLT_OT_RETURN_INT(retval); +} + + +/*** + * NAME + * flt_ot_ctx_loop - + * + * ARGUMENTS + * smp - + * scope - + * prefix - + * err - + * func - + * ptr - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static int flt_ot_ctx_loop(struct sample *smp, const char *scope, const char *prefix, char **err, flt_ot_ctx_loop_cb func, void *ptr) +{ + FLT_OT_VAR_CTX_SIZE var_ctx_size; + char var_name[BUFSIZ], var_ctx[BUFSIZ]; + int i, var_name_len, var_ctx_len, rc, n = 1, retval = 0; + + FLT_OT_FUNC("%p, \"%s\", \"%s\", %p:%p, %p, %p", smp, scope, prefix, FLT_OT_DPTR_ARGS(err), func, ptr); + + /* + * The variable in which we will save the name of the OpenTracing + * context variable. + */ + var_name_len = flt_ot_var_name(scope, prefix, NULL, 0, var_name, sizeof(var_name), err); + if (var_name_len == -1) + FLT_OT_RETURN_INT(FLT_OT_RET_ERROR); + + /* + * Here we will try to find all the previously recorded variables from + * the currently set OpenTracing context. If we find the required + * variable and it is marked as deleted, we will mark it as active. + * If we do not find it, then it is added to the end of the previously + * saved names. + */ + if (vars_get_by_name(var_name, var_name_len, smp, NULL) == 0) { + FLT_OT_DBG(2, "ctx '%s' no variable found", var_name); + } + else if (smp->data.type != SMP_T_BIN) { + FLT_OT_ERR("ctx '%s' invalid data type %d", var_name, smp->data.type); + + retval = FLT_OT_RET_ERROR; + } + else { + FLT_OT_DBG_BUF(2, &(smp->data.u.str)); + + for (i = 0; i < b_data(&(smp->data.u.str)); i += sizeof(var_ctx_size) + var_ctx_len, n++) { + var_ctx_size = *((typeof(var_ctx_size) *)(b_orig(&(smp->data.u.str)) + i)); + var_ctx_len = abs(var_ctx_size); + + if ((i + sizeof(var_ctx_size) + var_ctx_len) > b_data(&(smp->data.u.str))) { + FLT_OT_ERR("ctx '%s' invalid data size", var_name); + + retval = FLT_OT_RET_ERROR; + + break; + } + + (void)memcpy(var_ctx, b_orig(&(smp->data.u.str)) + i + sizeof(var_ctx_size), var_ctx_len); + var_ctx[var_ctx_len] = '\0'; + + rc = func(smp, i, scope, prefix, var_ctx, var_ctx_size, err, ptr); + if (rc == FLT_OT_RET_ERROR) { + retval = FLT_OT_RET_ERROR; + + break; + } + else if (rc > 0) { + retval = n; + + break; + } + } + } + + FLT_OT_RETURN_INT(retval); +} + + +/*** + * NAME + * flt_ot_ctx_set_cb - + * + * ARGUMENTS + * smp - + * idx - + * scope - + * prefix - + * name - + * name_len - + * err - + * ptr - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static int flt_ot_ctx_set_cb(struct sample *smp, size_t idx, const char *scope, const char *prefix, const char *name, FLT_OT_VAR_CTX_SIZE name_len, char **err, void *ptr) +{ + struct flt_ot_ctx *ctx = ptr; + int retval = 0; + + FLT_OT_FUNC("%p, %zu, \"%s\", \"%s\", \"%s\", %hhd, %p:%p, %p", smp, idx, scope, prefix, name, name_len, FLT_OT_DPTR_ARGS(err), ptr); + + if ((name_len == ctx->value_len) && (strncmp(name, ctx->value, name_len) == 0)) { + FLT_OT_DBG(2, "ctx '%s' found\n", name); + + retval = 1; + } + + FLT_OT_RETURN_INT(retval); +} + + +/*** + * NAME + * flt_ot_ctx_set - + * + * ARGUMENTS + * s - + * scope - + * prefix - + * name - + * opt - + * err - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static int flt_ot_ctx_set(struct stream *s, const char *scope, const char *prefix, const char *name, uint opt, char **err) +{ + struct flt_ot_ctx ctx; + struct sample smp_ctx; + char var_name[BUFSIZ]; + bool flag_alloc = 0; + int rc, var_name_len, retval = FLT_OT_RET_ERROR; + + FLT_OT_FUNC("%p, \"%s\", \"%s\", \"%s\", %u, %p:%p", s, scope, prefix, name, opt, FLT_OT_DPTR_ARGS(err)); + + /* + * The variable in which we will save the name of the OpenTracing + * context variable. + */ + var_name_len = flt_ot_var_name(scope, prefix, NULL, 0, var_name, sizeof(var_name), err); + if (var_name_len == -1) + FLT_OT_RETURN_INT(retval); + + /* Normalized name of the OpenTracing context variable. */ + ctx.value_len = flt_ot_var_name(name, NULL, NULL, 0, ctx.value, sizeof(ctx.value), err); + if (ctx.value_len == -1) + FLT_OT_RETURN_INT(retval); + + flt_ot_smp_init(s, &smp_ctx, opt, 0, NULL); + + retval = flt_ot_ctx_loop(&smp_ctx, scope, prefix, err, flt_ot_ctx_set_cb, &ctx); + if (retval == 0) { + rc = flt_ot_smp_add(&(smp_ctx.data), ctx.value, ctx.value_len, err); + if (rc == FLT_OT_RET_ERROR) + retval = FLT_OT_RET_ERROR; + + flag_alloc = (rc == 0); + } + + if (retval == FLT_OT_RET_ERROR) { + /* Do nothing. */ + } + else if (retval > 0) { + FLT_OT_DBG(2, "ctx '%s' data found", ctx.value); + } + else if (vars_set_by_name_ifexist(var_name, var_name_len, &smp_ctx) == 0) { + FLT_OT_ERR("failed to set ctx '%s'", var_name); + + retval = FLT_OT_RET_ERROR; + } + else { + FLT_OT_DBG(2, "ctx '%s' -> '%.*s' set", var_name, (int)b_data(&(smp_ctx.data.u.str)), b_orig(&(smp_ctx.data.u.str))); + + retval = b_data(&(smp_ctx.data.u.str)); + } + + if (flag_alloc) + FLT_OT_FREE(b_orig(&(smp_ctx.data.u.str))); + + FLT_OT_RETURN_INT(retval); +} + + +/*** + * NAME + * flt_ot_var_register - + * + * ARGUMENTS + * scope - + * prefix - + * name - + * err - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +int flt_ot_var_register(const char *scope, const char *prefix, const char *name, char **err) +{ + struct arg arg; + char var_name[BUFSIZ]; + int retval = -1, var_name_len; + + FLT_OT_FUNC("\"%s\", \"%s\", \"%s\", %p:%p", scope, prefix, name, FLT_OT_DPTR_ARGS(err)); + + var_name_len = flt_ot_var_name(scope, prefix, name, 0, var_name, sizeof(var_name), err); + if (var_name_len == -1) + FLT_OT_RETURN_INT(retval); + + /* Set <size> to 0 to not release var_name memory in vars_check_arg(). */ + (void)memset(&arg, 0, sizeof(arg)); + arg.type = ARGT_STR; + arg.data.str.area = var_name; + arg.data.str.data = var_name_len; + + if (vars_check_arg(&arg, err) == 0) { + FLT_OT_ERR_APPEND("failed to register variable '%s': %s", var_name, *err); + } else { + FLT_OT_DBG(2, "variable '%s' registered", var_name); + + retval = var_name_len; + } + + FLT_OT_RETURN_INT(retval); +} + + +/*** + * NAME + * flt_ot_var_set - + * + * ARGUMENTS + * s - + * scope - + * prefix - + * name - + * value - + * opt - + * err - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +int flt_ot_var_set(struct stream *s, const char *scope, const char *prefix, const char *name, const char *value, uint opt, char **err) +{ + struct sample smp; + char var_name[BUFSIZ]; + int retval = -1, var_name_len; + + FLT_OT_FUNC("%p, \"%s\", \"%s\", \"%s\", \"%s\", %u, %p:%p", s, scope, prefix, name, value, opt, FLT_OT_DPTR_ARGS(err)); + + var_name_len = flt_ot_var_name(scope, prefix, name, 0, var_name, sizeof(var_name), err); + if (var_name_len == -1) + FLT_OT_RETURN_INT(retval); + + flt_ot_smp_init(s, &smp, opt, SMP_T_STR, value); + + if (vars_set_by_name_ifexist(var_name, var_name_len, &smp) == 0) { + FLT_OT_ERR("failed to set variable '%s'", var_name); + } else { + FLT_OT_DBG(2, "variable '%s' set", var_name); + + retval = var_name_len; + + if (strcmp(scope, FLT_OT_VARS_SCOPE) == 0) + retval = flt_ot_ctx_set(s, scope, prefix, name, opt, err); + } + + FLT_OT_RETURN_INT(retval); +} + + +/*** + * NAME + * flt_ot_vars_unset_cb - + * + * ARGUMENTS + * smp - + * idx - + * scope - + * prefix - + * name - + * name_len - + * err - + * ptr - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static int flt_ot_vars_unset_cb(struct sample *smp, size_t idx, const char *scope, const char *prefix, const char *name, FLT_OT_VAR_CTX_SIZE name_len, char **err, void *ptr) +{ + struct sample smp_ctx; + char var_ctx[BUFSIZ]; + int var_ctx_len, retval = FLT_OT_RET_ERROR; + + FLT_OT_FUNC("%p, %zu, \"%s\", \"%s\", \"%s\", %hhd, %p:%p, %p", smp, idx, scope, prefix, name, name_len, FLT_OT_DPTR_ARGS(err), ptr); + + var_ctx_len = flt_ot_var_name(scope, prefix, name, 1, var_ctx, sizeof(var_ctx), err); + if (var_ctx_len == -1) { + FLT_OT_ERR("ctx '%s' invalid", name); + + FLT_OT_RETURN_INT(retval); + } + + flt_ot_smp_init(smp->strm, &smp_ctx, smp->opt, 0, NULL); + + if (vars_unset_by_name_ifexist(var_ctx, var_ctx_len, &smp_ctx) == 0) { + FLT_OT_ERR("ctx '%s' no variable found", var_ctx); + } else { + FLT_OT_DBG(2, "ctx '%s' unset", var_ctx); + + retval = 0; + } + + FLT_OT_RETURN_INT(retval); +} + + +/*** + * NAME + * flt_ot_vars_unset - + * + * ARGUMENTS + * s - + * scope - + * prefix - + * opt - + * err - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +int flt_ot_vars_unset(struct stream *s, const char *scope, const char *prefix, uint opt, char **err) +{ + struct sample smp_ctx; + char var_name[BUFSIZ]; + int var_name_len, retval; + + FLT_OT_FUNC("%p, \"%s\", \"%s\", %u, %p:%p", s, scope, prefix, opt, FLT_OT_DPTR_ARGS(err)); + + flt_ot_smp_init(s, &smp_ctx, opt, 0, NULL); + + retval = flt_ot_ctx_loop(&smp_ctx, scope, prefix, err, flt_ot_vars_unset_cb, NULL); + if (retval != FLT_OT_RET_ERROR) { + /* + * After all ctx variables have been unset, the variable used + * to store their names should also be unset. + */ + var_name_len = flt_ot_var_name(scope, prefix, NULL, 0, var_name, sizeof(var_name), err); + if (var_name_len == -1) + FLT_OT_RETURN_INT(FLT_OT_RET_ERROR); + + flt_ot_smp_init(s, &smp_ctx, opt, 0, NULL); + + if (vars_unset_by_name_ifexist(var_name, var_name_len, &smp_ctx) == 0) { + FLT_OT_DBG(2, "variable '%s' not found", var_name); + } else { + FLT_OT_DBG(2, "variable '%s' unset", var_name); + + retval = 1; + } + } + + FLT_OT_RETURN_INT(retval); +} + + +/*** + * NAME + * flt_ot_vars_get_cb - + * + * ARGUMENTS + * smp - + * idx - + * scope - + * prefix - + * name - + * name_len - + * err - + * ptr - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +static int flt_ot_vars_get_cb(struct sample *smp, size_t idx, const char *scope, const char *prefix, const char *name, FLT_OT_VAR_CTX_SIZE name_len, char **err, void *ptr) +{ + struct otc_text_map **map = ptr; + struct sample smp_ctx; + char var_ctx[BUFSIZ], ot_var_name[BUFSIZ], ch; + int var_ctx_len, ot_var_name_len, retval = FLT_OT_RET_ERROR; + + FLT_OT_FUNC("%p, %zu, \"%s\", \"%s\", \"%s\", %hhd, %p:%p, %p", smp, idx, scope, prefix, name, name_len, FLT_OT_DPTR_ARGS(err), ptr); + + var_ctx_len = flt_ot_var_name(scope, prefix, name, 1, var_ctx, sizeof(var_ctx), err); + if (var_ctx_len == -1) { + FLT_OT_ERR("ctx '%s' invalid", name); + + FLT_OT_RETURN_INT(retval); + } + + flt_ot_smp_init(smp->strm, &smp_ctx, smp->opt, 0, NULL); + + if (vars_get_by_name(var_ctx, var_ctx_len, &smp_ctx, NULL) != 0) { + FLT_OT_DBG(2, "'%s' -> '%.*s'", var_ctx, (int)b_data(&(smp_ctx.data.u.str)), b_orig(&(smp_ctx.data.u.str))); + + if (*map == NULL) { + *map = otc_text_map_new(NULL, 8); + if (*map == NULL) { + FLT_OT_ERR("failed to create map data"); + + FLT_OT_RETURN_INT(FLT_OT_RET_ERROR); + } + } + + /* + * Eh, because the use of some characters is not allowed + * in the variable name, the conversion of the replaced + * characters to the original is performed here. + */ + for (ot_var_name_len = 0; (ch = name[ot_var_name_len]) != '\0'; ot_var_name_len++) + if (ot_var_name_len >= (FLT_OT_TABLESIZE(ot_var_name) - 1)) { + FLT_OT_ERR("failed to reverse variable name, buffer too small"); + + otc_text_map_destroy(map, OTC_TEXT_MAP_FREE_KEY | OTC_TEXT_MAP_FREE_VALUE); + + break; + } else { + ot_var_name[ot_var_name_len] = (ch == FLT_OT_VAR_CHAR_DASH) ? '-' : ((ch == FLT_OT_VAR_CHAR_SPACE) ? ' ' : ch); + } + ot_var_name[ot_var_name_len] = '\0'; + + if (*map == NULL) { + retval = FLT_OT_RET_ERROR; + } + else if (otc_text_map_add(*map, ot_var_name, ot_var_name_len, b_orig(&(smp_ctx.data.u.str)), b_data(&(smp_ctx.data.u.str)), OTC_TEXT_MAP_DUP_KEY | OTC_TEXT_MAP_DUP_VALUE) == -1) { + FLT_OT_ERR("failed to add map data"); + + otc_text_map_destroy(map, OTC_TEXT_MAP_FREE_KEY | OTC_TEXT_MAP_FREE_VALUE); + + retval = FLT_OT_RET_ERROR; + } + else { + retval = 0; + } + } else { + FLT_OT_DBG(2, "ctx '%s' no variable found", var_ctx); + } + + FLT_OT_RETURN_INT(retval); +} + + +/*** + * NAME + * flt_ot_vars_get - + * + * ARGUMENTS + * s - + * scope - + * prefix - + * opt - + * err - + * + * DESCRIPTION + * - + * + * RETURN VALUE + * - + */ +struct otc_text_map *flt_ot_vars_get(struct stream *s, const char *scope, const char *prefix, uint opt, char **err) +{ + struct sample smp_ctx; + struct otc_text_map *retptr = NULL; + + FLT_OT_FUNC("%p, \"%s\", \"%s\", %u, %p:%p", s, scope, prefix, opt, FLT_OT_DPTR_ARGS(err)); + + flt_ot_smp_init(s, &smp_ctx, opt, 0, NULL); + + (void)flt_ot_ctx_loop(&smp_ctx, scope, prefix, err, flt_ot_vars_get_cb, &retptr); + + ot_text_map_show(retptr); + + if ((retptr != NULL) && (retptr->count == 0)) { + FLT_OT_DBG(2, "WARNING: no variables found"); + + otc_text_map_destroy(&retptr, OTC_TEXT_MAP_FREE_KEY | OTC_TEXT_MAP_FREE_VALUE); + } + + FLT_OT_RETURN_PTR(retptr); +} + +/* + * Local variables: + * c-indent-level: 8 + * c-basic-offset: 8 + * End: + * + * vi: noexpandtab shiftwidth=8 tabstop=8 + */ |