From df87f8092f5b6b54eef0d5acf3c27c2e398a401a Mon Sep 17 00:00:00 2001 From: Ole Troan Date: Wed, 18 Nov 2020 19:17:48 +0100 Subject: api: vat2 and json autogeneration for api messages VAT2: A completely auto-generated replacement of VAT. Reads input message in JSON from stdin and outputs received messages in JSON. A VAT2 plugin is automatically built for a .api file. There no longer a need for a separate _test.c. Example: vat2 show_version {} { "_msgname": "show_version_reply", "retval": 0, "program": "vpe", "version": "21.01-rc0~411-gf6eb348a6", "build_date": "2020-11-19T09:49:25", "build_directory": "/vpp/autogen3" } vat2 sw_interface_dump '{"sw_if_index": -1, "name_filter_valid": 0, "name_filter": ""}' [{ "_msgname": "sw_interface_details", "sw_if_index": 0, "sup_sw_if_index": 0, "l2_address": "00:00:00:00:00:00", "flags": "Invalid ENUM", "type": "IF_API_TYPE_HARDWARE", "link_duplex": "LINK_DUPLEX_API_UNKNOWN", "link_speed": 0, "link_mtu": 0, "mtu": [0, 0, 0, 0], "sub_id": 0, "sub_number_of_tags": 0, "sub_outer_vlan_id": 0, "sub_inner_vlan_id": 0, "sub_if_flags": "Invalid ENUM", "vtr_op": 0, "vtr_push_dot1q": 0, "vtr_tag1": 0, "vtr_tag2": 0, "outer_tag": 0, "b_dmac": "00:00:00:00:00:00", "b_smac": "00:00:00:00:00:00", "b_vlanid": 0, "i_sid": 0, "interface_name": "local0", "interface_dev_type": "local", "tag": "" }] This is the first phase and vat2 is not integrated in packaging yet. Type: feature Signed-off-by: Ole Troan Change-Id: Ib45ddeafb180ea7da8c5dc274a9274d7a4edc876 Signed-off-by: Ole Troan --- src/vat2/CMakeLists.txt | 43 ++++ src/vat2/jsonconvert.c | 514 ++++++++++++++++++++++++++++++++++++++++++++++++ src/vat2/jsonconvert.h | 92 +++++++++ src/vat2/main.c | 227 +++++++++++++++++++++ src/vat2/plugin.c | 195 ++++++++++++++++++ src/vat2/vat2.h | 12 ++ src/vat2/vat2_helpers.h | 34 ++++ 7 files changed, 1117 insertions(+) create mode 100644 src/vat2/CMakeLists.txt create mode 100644 src/vat2/jsonconvert.c create mode 100644 src/vat2/jsonconvert.h create mode 100644 src/vat2/main.c create mode 100644 src/vat2/plugin.c create mode 100644 src/vat2/vat2.h create mode 100644 src/vat2/vat2_helpers.h (limited to 'src/vat2') diff --git a/src/vat2/CMakeLists.txt b/src/vat2/CMakeLists.txt new file mode 100644 index 00000000000..690267c6113 --- /dev/null +++ b/src/vat2/CMakeLists.txt @@ -0,0 +1,43 @@ +# Copyright (c) 2020 Cisco and/or its affiliates. +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at: +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +############################################################################## +# vat2 +############################################################################## +add_vpp_executable(vat2 ENABLE_EXPORTS NO_INSTALL + SOURCES + main.c + plugin.c + jsonconvert.c + + DEPENDS api_headers + + LINK_LIBRARIES + vlibmemoryclient + svm + vppinfra + vppapiclient + Threads::Threads + rt m dl crypto +) + +############################################################################## +# vat2 headers +############################################################################## +install( + FILES + jsonconvert.h + vat2_helpers.h + DESTINATION include/vat2 + COMPONENT vpp-dev +) diff --git a/src/vat2/jsonconvert.c b/src/vat2/jsonconvert.c new file mode 100644 index 00000000000..3aeaeedb2f7 --- /dev/null +++ b/src/vat2/jsonconvert.c @@ -0,0 +1,514 @@ +/* + * Copyright (c) 2020 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include +#include +#include +#include +#include +#include "jsonconvert.h" + +#define _(T) \ +int vl_api_ ##T## _fromjson(cJSON *o, T *d) \ +{ \ + if (!cJSON_IsNumber(o)) return -1; \ + memcpy(d, &o->valueint, sizeof(T)); \ + return 0; \ +} + foreach_vat2_fromjson +#undef _ + +int vl_api_bool_fromjson(cJSON *o, bool *d) +{ + if (!cJSON_IsBool(o)) return -1; + *d = o->valueint ? true : false; + return 0; +} + +int vl_api_u8_string_fromjson(cJSON *o, u8 *s, int len) +{ + unformat_input_t input; + char *p = cJSON_GetStringValue(o); + unformat_init_string (&input, p, strlen(p)); + unformat(&input, "0x%U", unformat_hex_string, s); + return 0; +} + +u8 * +u8string_fromjson(cJSON *o, char *fieldname) +{ + u8 *s = 0; + unformat_input_t input; + cJSON *item = cJSON_GetObjectItem(o, fieldname); + if (!item) { + printf("Illegal JSON, no such fieldname %s\n", fieldname); + return 0; + } + + char *p = cJSON_GetStringValue(item); + unformat_init_string (&input, p, strlen(p)); + unformat(&input, "0x%U", unformat_hex_string, &s); + return s; +} + +int +u8string_fromjson2(cJSON *o, char *fieldname, u8 *data) +{ + u8 *s = u8string_fromjson(o, fieldname); + if (!s) return 0; + memcpy(data, s, vec_len(s)); + vec_free(s); + return 0; +} + +/* Parse an IP4 address %d.%d.%d.%d. */ +uword +unformat_ip4_address (unformat_input_t * input, va_list * args) +{ + u8 *result = va_arg (*args, u8 *); + unsigned a[4]; + + if (!unformat (input, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3])) + return 0; + + if (a[0] >= 256 || a[1] >= 256 || a[2] >= 256 || a[3] >= 256) + return 0; + + result[0] = a[0]; + result[1] = a[1]; + result[2] = a[2]; + result[3] = a[3]; + + return 1; +} + +/* Parse an IP6 address. */ +uword +unformat_ip6_address (unformat_input_t * input, va_list * args) +{ + ip6_address_t *result = va_arg (*args, ip6_address_t *); + u16 hex_quads[8]; + uword hex_quad, n_hex_quads, hex_digit, n_hex_digits; + uword c, n_colon, double_colon_index; + + n_hex_quads = hex_quad = n_hex_digits = n_colon = 0; + double_colon_index = ARRAY_LEN (hex_quads); + while ((c = unformat_get_input (input)) != UNFORMAT_END_OF_INPUT) + { + hex_digit = 16; + if (c >= '0' && c <= '9') + hex_digit = c - '0'; + else if (c >= 'a' && c <= 'f') + hex_digit = c + 10 - 'a'; + else if (c >= 'A' && c <= 'F') + hex_digit = c + 10 - 'A'; + else if (c == ':' && n_colon < 2) + n_colon++; + else + { + unformat_put_input (input); + break; + } + + /* Too many hex quads. */ + if (n_hex_quads >= ARRAY_LEN (hex_quads)) + return 0; + + if (hex_digit < 16) + { + hex_quad = (hex_quad << 4) | hex_digit; + + /* Hex quad must fit in 16 bits. */ + if (n_hex_digits >= 4) + return 0; + + n_colon = 0; + n_hex_digits++; + } + + /* Save position of :: */ + if (n_colon == 2) + { + /* More than one :: ? */ + if (double_colon_index < ARRAY_LEN (hex_quads)) + return 0; + double_colon_index = n_hex_quads; + } + + if (n_colon > 0 && n_hex_digits > 0) + { + hex_quads[n_hex_quads++] = hex_quad; + hex_quad = 0; + n_hex_digits = 0; + } + } + + if (n_hex_digits > 0) + hex_quads[n_hex_quads++] = hex_quad; + + + { + word i; + + /* Expand :: to appropriate number of zero hex quads. */ + if (double_colon_index < ARRAY_LEN (hex_quads)) + { + word n_zero = ARRAY_LEN (hex_quads) - n_hex_quads; + + for (i = n_hex_quads - 1; i >= (signed) double_colon_index; i--) + hex_quads[n_zero + i] = hex_quads[i]; + + for (i = 0; i < n_zero; i++) + { + ASSERT ((double_colon_index + i) < ARRAY_LEN (hex_quads)); + hex_quads[double_colon_index + i] = 0; + } + + n_hex_quads = ARRAY_LEN (hex_quads); + } + + /* Too few hex quads given. */ + if (n_hex_quads < ARRAY_LEN (hex_quads)) + return 0; + + for (i = 0; i < ARRAY_LEN (hex_quads); i++) + result->as_u16[i] = clib_host_to_net_u16 (hex_quads[i]); + + return 1; + } +} + +u8 * +format_ip6_address (u8 * s, va_list * args) +{ + ip6_address_t *a = va_arg (*args, ip6_address_t *); + u32 max_zero_run = 0, this_zero_run = 0; + int max_zero_run_index = -1, this_zero_run_index = 0; + int in_zero_run = 0, i; + int last_double_colon = 0; + + /* Ugh, this is a pain. Scan forward looking for runs of 0's */ + for (i = 0; i < ARRAY_LEN (a->as_u16); i++) + { + if (a->as_u16[i] == 0) + { + if (in_zero_run) + this_zero_run++; + else + { + in_zero_run = 1; + this_zero_run = 1; + this_zero_run_index = i; + } + } + else + { + if (in_zero_run) + { + /* offer to compress the biggest run of > 1 zero */ + if (this_zero_run > max_zero_run && this_zero_run > 1) + { + max_zero_run_index = this_zero_run_index; + max_zero_run = this_zero_run; + } + } + in_zero_run = 0; + this_zero_run = 0; + } + } + + if (in_zero_run) + { + if (this_zero_run > max_zero_run && this_zero_run > 1) + { + max_zero_run_index = this_zero_run_index; + max_zero_run = this_zero_run; + } + } + + for (i = 0; i < ARRAY_LEN (a->as_u16); i++) + { + if (i == max_zero_run_index) + { + s = format (s, "::"); + i += max_zero_run - 1; + last_double_colon = 1; + } + else + { + s = format (s, "%s%x", + (last_double_colon || i == 0) ? "" : ":", + clib_net_to_host_u16 (a->as_u16[i])); + last_double_colon = 0; + } + } + + return s; +} + +void *vl_api_ip4_address_t_fromjson(void *mp, int *len, cJSON *o, vl_api_ip4_address_t *a) +{ + unformat_input_t input; + char *p = cJSON_GetStringValue(o); + if (!p) return 0; + unformat_init_string (&input, p, strlen(p)); + unformat(&input, "%U", unformat_ip4_address, a); + return mp; +} + +void *vl_api_ip4_prefix_t_fromjson(void *mp, int *len, cJSON *o, vl_api_ip4_prefix_t *a) +{ + unformat_input_t input; + char *p = cJSON_GetStringValue(o); + if (!p) return 0; + unformat_init_string (&input, p, strlen(p)); + unformat(&input, "%U/%d", unformat_ip4_address, &a->address, &a->len); + return mp; +} + +void *vl_api_ip4_address_with_prefix_t_fromjson(void *mp, int *len, cJSON *o, vl_api_ip4_prefix_t *a) +{ + return vl_api_ip4_prefix_t_fromjson(mp, len, o, a); +} +void *vl_api_ip6_address_t_fromjson(void *mp, int *len, cJSON *o, vl_api_ip6_address_t *a) +{ + unformat_input_t input; + char *p = cJSON_GetStringValue(o); + if (!p) return 0; + unformat_init_string (&input, p, strlen(p)); + unformat(&input, "%U", unformat_ip6_address, a); + return mp; +} + +void *vl_api_ip6_prefix_t_fromjson(void *mp, int *len, cJSON *o, vl_api_ip6_prefix_t *a) +{ + unformat_input_t input; + char *p = cJSON_GetStringValue(o); + if (!p) return 0; + unformat_init_string (&input, p, strlen(p)); + unformat(&input, "%U/%d", unformat_ip6_address, &a->address, &a->len); + return mp; +} + +void *vl_api_ip6_address_with_prefix_t_fromjson(void *mp, int *len, cJSON *o, vl_api_ip6_prefix_t *a) +{ + return vl_api_ip6_prefix_t_fromjson(mp, len, o, a); +} + +void *vl_api_address_t_fromjson(void *mp, int *len, cJSON *o, vl_api_address_t *a) +{ + unformat_input_t input; + + char *p = cJSON_GetStringValue(o); + if (!p) return 0; + unformat_init_string (&input, p, strlen(p)); + if (a->af == ADDRESS_IP4) + unformat(&input, "%U", unformat_ip4_address, &a->un.ip4); + else if (a->af == ADDRESS_IP6) + unformat(&input, "%U", unformat_ip6_address, &a->un.ip6); + else + return 0; + return mp; +} + +void *vl_api_prefix_t_fromjson(void *mp, int *len, cJSON *o, vl_api_prefix_t *a) +{ + unformat_input_t input; + + char *p = cJSON_GetStringValue(o); + if (!p) return 0; + unformat_init_string (&input, p, strlen(p)); + if (a->address.af == ADDRESS_IP4) + unformat(&input, "%U/%d", unformat_ip4_address, &a->address.un.ip4, &a->len); + else if (a->address.af == ADDRESS_IP6) + unformat(&input, "%U/%d", unformat_ip6_address, &a->address.un.ip6, &a->len); + else + return 0; + return mp; +} + +void *vl_api_address_with_prefix_t_fromjson(void *mp, int *len, cJSON *o, vl_api_prefix_t *a) +{ + return vl_api_prefix_t_fromjson(mp, len, o, a); +} + +uword +unformat_mac_address (unformat_input_t * input, va_list * args) +{ + mac_address_t *mac = va_arg (*args, mac_address_t *); + u32 i, a[3]; + + if (unformat (input, "%_%X:%X:%X:%X:%X:%X%_", + 1, &mac->bytes[0], 1, &mac->bytes[1], 1, &mac->bytes[2], + 1, &mac->bytes[3], 1, &mac->bytes[4], 1, &mac->bytes[5])) + return (1); + else if (unformat (input, "%_%x.%x.%x%_", &a[0], &a[1], &a[2])) + { + for (i = 0; i < ARRAY_LEN (a); i++) + if (a[i] >= (1 << 16)) + return 0; + + mac->bytes[0] = (a[0] >> 8) & 0xff; + mac->bytes[1] = (a[0] >> 0) & 0xff; + mac->bytes[2] = (a[1] >> 8) & 0xff; + mac->bytes[3] = (a[1] >> 0) & 0xff; + mac->bytes[4] = (a[2] >> 8) & 0xff; + mac->bytes[5] = (a[2] >> 0) & 0xff; + + return (1); + } + return (0); +} + +void *vl_api_mac_address_t_fromjson(void *mp, int *len, cJSON *o, vl_api_mac_address_t *a) +{ + unformat_input_t input; + + char *p = cJSON_GetStringValue(o); + unformat_init_string (&input, p, strlen(p)); + unformat(&input, "%U", unformat_mac_address, a); + return mp; +} + +/* Format an IP4 address. */ +u8 * +format_ip4_address (u8 * s, va_list * args) +{ + u8 *a = va_arg (*args, u8 *); + return format (s, "%d.%d.%d.%d", a[0], a[1], a[2], a[3]); +} + +int +vl_api_c_string_to_api_string (const char *buf, vl_api_string_t * str) +{ + /* copy without nul terminator */ + u32 len = strlen (buf); + if (len > 0) + clib_memcpy_fast (str->buf, buf, len); + str->length = htonl (len); + return len + sizeof (u32); +} + +u8 * +format_vl_api_interface_index_t (u8 *s, va_list *args) +{ + u32 *a = va_arg (*args, u32 *); + return format (s, "%u", *a); +} + +uword +unformat_vl_api_interface_index_t (unformat_input_t * input, va_list * args) +{ + u32 *a = va_arg (*args, u32 *); + + if (!unformat (input, "%u", a)) + return 0; + return 1; +} + +void +vl_api_string_cJSON_AddToObject(cJSON * const object, const char * const name, vl_api_string_t *astr) +{ + + if (astr == 0) return; + u32 length = clib_net_to_host_u32 (astr->length); + + char *cstr = malloc(length + 1); + memcpy(cstr, astr->buf, length); + cstr[length] = '\0'; + cJSON_AddStringToObject(object, name, cstr); + free(cstr); +} + +u8 * +format_vl_api_timestamp_t(u8 * s, va_list * args) +{ + f64 timestamp = va_arg (*args, f64); + struct tm *tm; + word msec; + + time_t t = timestamp; + tm = gmtime (&t); + msec = 1e6 * (timestamp - t); + return format (s, "%4d-%02d-%02dT%02d:%02d:%02d.%06dZ", 1900 + tm->tm_year, + 1 + tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, + tm->tm_sec, msec); +} + +u8 * +format_vl_api_timedelta_t(u8 * s, va_list * args) +{ + return format_vl_api_timestamp_t(s, args); +} + +uword +unformat_vl_api_timedelta_t(unformat_input_t * input, va_list * args) +{ + return 0; +} + +uword +unformat_vl_api_timestamp_t(unformat_input_t * input, va_list * args) +{ + return 0; +} +u8 *format_vl_api_gbp_scope_t(u8 * s, va_list * args) +{ + return 0; +} +uword unformat_vl_api_gbp_scope_t(unformat_input_t * input, va_list * args) +{ + return 0; +} + +cJSON * +vl_api_ip4_address_with_prefix_t_tojson (vl_api_ip4_prefix_t *a) { + u8 *s = format(0, "%U", format_vl_api_ip4_address_t, a); + cJSON *o = cJSON_CreateString((char *)s); + vec_free(s); + return o; +} +cJSON * +vl_api_ip6_address_with_prefix_t_tojson (vl_api_ip6_prefix_t *a) { + u8 *s = format(0, "%U", format_vl_api_ip6_address_t, a); + cJSON *o = cJSON_CreateString((char *)s); + vec_free(s); + return o; +} +cJSON * +vl_api_address_with_prefix_t_tojson (vl_api_prefix_t *a) { + u8 *s = format(0, "%U", format_vl_api_address_t, a); + cJSON *o = cJSON_CreateString((char *)s); + vec_free(s); + return o; +} +u8 * +format_vl_api_mac_address_t (u8 * s, va_list * args) +{ + const mac_address_t *mac = va_arg (*args, mac_address_t *); + + return format (s, "%02x:%02x:%02x:%02x:%02x:%02x", + mac->bytes[0], mac->bytes[1], mac->bytes[2], + mac->bytes[3], mac->bytes[4], mac->bytes[5]); +} +#define _(T) \ + cJSON *vl_api_ ##T## _t_tojson (vl_api_ ##T## _t *a) { \ + u8 *s = format(0, "%U", format_vl_api_ ##T## _t, a); \ + cJSON *o = cJSON_CreateString((char *)s); \ + vec_free(s); \ + return o; \ + } +foreach_vat2_tojson +#undef _ diff --git a/src/vat2/jsonconvert.h b/src/vat2/jsonconvert.h new file mode 100644 index 00000000000..2e723fa637d --- /dev/null +++ b/src/vat2/jsonconvert.h @@ -0,0 +1,92 @@ +/* + * Copyright (c) 2020 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef included_json_convert_h +#define included_json_convert_h + +#include +#include +#include +#include +#include +#include + +#define foreach_vat2_fromjson \ + _(i8) \ + _(u8) \ + _(i16) \ + _(u16) \ + _(i32) \ + _(u32) \ + _(u64) \ + _(f64) + +#define _(T) \ + int vl_api_ ##T## _fromjson(cJSON *o, T *d); + foreach_vat2_fromjson +#undef _ + +int vl_api_bool_fromjson(cJSON *o, bool *d); +void *vl_api_ip4_address_t_fromjson(void *mp, int *len, cJSON *o, vl_api_ip4_address_t *a); +void *vl_api_ip4_prefix_t_fromjson(void *mp, int *len, cJSON *o, vl_api_ip4_prefix_t *a); +void *vl_api_ip4_address_with_prefix_t_fromjson(void *mp, int *len, cJSON *o, vl_api_ip4_prefix_t *a); +void *vl_api_ip6_address_t_fromjson(void *mp, int *len, cJSON *o, vl_api_ip6_address_t *a); +void *vl_api_ip6_prefix_t_fromjson(void *mp, int *len, cJSON *o, vl_api_ip6_prefix_t *a); +void *vl_api_ip6_address_with_prefix_t_fromjson(void *mp, int *len, cJSON *o, vl_api_ip6_prefix_t *a); +void *vl_api_address_t_fromjson(void *mp, int *len, cJSON *o, vl_api_address_t *a); +void *vl_api_prefix_t_fromjson(void *mp, int *len, cJSON *o, vl_api_prefix_t *a); +void *vl_api_address_with_prefix_t_fromjson(void *mp, int *len, cJSON *o, vl_api_prefix_t *a); +void *vl_api_mac_address_t_fromjson(void *mp, int *len, cJSON *o, vl_api_mac_address_t *a); + +uword unformat_ip4_address(unformat_input_t * input, va_list * args); +uword unformat_ip6_address(unformat_input_t * input, va_list * args); +u8 *format_ip6_address(u8 * s, va_list * args); +uword unformat_mac_address(unformat_input_t * input, va_list * args); +u8 *format_ip4_address(u8 * s, va_list * args); +u8 *format_vl_api_interface_index_t(u8 *s, va_list *args); +uword unformat_vl_api_interface_index_t(unformat_input_t * input, va_list * args); +u8 *format_vl_api_timestamp_t(u8 * s, va_list * args); +u8 *format_vl_api_timedelta_t(u8 * s, va_list * args); +uword unformat_vl_api_timedelta_t(unformat_input_t * input, va_list * args); +uword unformat_vl_api_timestamp_t(unformat_input_t * input, va_list * args); +u8 *format_vl_api_gbp_scope_t(u8 * s, va_list * args); +uword unformat_vl_api_gbp_scope_t(unformat_input_t * input, va_list * args); + +int vl_api_c_string_to_api_string(const char *buf, vl_api_string_t * str); +void vl_api_string_cJSON_AddToObject(cJSON * const object, const char * const name, vl_api_string_t *astr); + +u8 *u8string_fromjson(cJSON *o, char *fieldname); +int u8string_fromjson2(cJSON *o, char *fieldname, u8 *data); +int vl_api_u8_string_fromjson(cJSON *o, u8 *s, int len); + +#define foreach_vat2_tojson \ + _(ip4_address) \ + _(ip4_prefix) \ + _(ip6_address) \ + _(ip6_prefix) \ + _(address) \ + _(prefix) \ + _(mac_address) + +#define _(T) \ + cJSON *vl_api_ ##T## _t_tojson(vl_api_ ##T## _t *); + foreach_vat2_tojson +#undef _ + +cJSON *vl_api_ip4_address_with_prefix_t_tojson (vl_api_ip4_prefix_t *a); +cJSON *vl_api_ip6_address_with_prefix_t_tojson (vl_api_ip6_prefix_t *a); +cJSON *vl_api_address_with_prefix_t_tojson (vl_api_prefix_t *a); + +#endif diff --git a/src/vat2/main.c b/src/vat2/main.c new file mode 100644 index 00000000000..5b042e23503 --- /dev/null +++ b/src/vat2/main.c @@ -0,0 +1,227 @@ +/* + * Copyright (c) 2020 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include +#include +#include +#include +#include +#include + +/* VPP API client includes */ +#include + +#include +#include "vat2.h" + +uword *function_by_name; +bool debug = false; + +char *vat2_plugin_path; +static void +vat2_find_plugin_path () +{ + char *p, path[PATH_MAX]; + int rv; + u8 *s; + + /* find executable path */ + if ((rv = readlink ("/proc/self/exe", path, PATH_MAX - 1)) == -1) + return; + + /* readlink doesn't provide null termination */ + path[rv] = 0; + + /* strip filename */ + if ((p = strrchr (path, '/')) == 0) + return; + *p = 0; + + /* strip bin/ */ + if ((p = strrchr (path, '/')) == 0) + return; + *p = 0; + + s = format (0, "%s/lib/" CLIB_TARGET_TRIPLET "/vat2_plugins:" + "%s/lib/vat2_plugins", path, path); + vec_add1 (s, 0); + vat2_plugin_path = (char *) s; +} + +void +vac_callback (unsigned char *data, int len) +{ + u16 result_msg_id = ntohs(*((u16 *)data)); + DBG("Received something async: %d\n", result_msg_id); +} + +int vat2_load_plugins (char *path, char *filter, int *loaded); + +static int +register_function (void) +{ + int loaded; + + vat2_find_plugin_path(); + DBG("Plugin Path %s\n", vat2_plugin_path); + int rv = vat2_load_plugins(vat2_plugin_path, 0, &loaded); + DBG("Loaded %u plugins\n", loaded); + return rv; +} + +void +vat2_register_function(char *name, cJSON (*f)(cJSON *)) +{ + hash_set_mem(function_by_name, name, f); +} + +int main (int argc, char **argv) +{ + /* Create a heap of 64MB */ + clib_mem_init (0, 64 << 20); + char *filename = 0; + int index; + int c; + opterr = 0; + cJSON *o = 0; + uword *p = 0; + + while ((c = getopt (argc, argv, "df:")) != -1) { + switch (c) { + case 'd': + debug = true; + break; + case 'f': + filename = optarg; + break; + case '?': + if (optopt == 'f') + fprintf (stderr, "Option -%c requires an argument.\n", optopt); + else if (isprint (optopt)) + fprintf (stderr, "Unknown option `-%c'.\n", optopt); + else + fprintf (stderr, + "Unknown option character `\\x%x'.\n", + optopt); + return 1; + default: + abort (); + } + } + + DBG("debug = %d, filename = %s\n", debug, filename); + + for (index = optind; index < argc; index++) + DBG ("Non-option argument %s\n", argv[index]); + + index = optind; + + /* Load plugins */ + function_by_name = hash_create_string (0, sizeof (uword)); + int res = register_function(); + if (res < 0) { + fprintf(stderr, "%s: loading plugins failed\n", argv[0]); + exit(-1); + } + + if (argc > index + 2) { + fprintf(stderr, "%s: Too many arguments\n", argv[0]); + exit(-1); + } + + /* Read JSON from stdin, command line or file */ + if (argc >= (index + 1)) { + p = hash_get_mem (function_by_name, argv[index]); + if (p == 0) { + fprintf(stderr, "%s: Unknown command: %s\n", argv[0], argv[index]); + exit(-1); + } + } + + if (argc == (index + 2)) { + o = cJSON_Parse(argv[index+1]); + if (!o) { + fprintf(stderr, "%s: Failed parsing JSON input: %s\n", argv[0], cJSON_GetErrorPtr()); + exit(-1); + } + } + + if (filename) { + if (argc > index + 1) { + fprintf(stderr, "%s: Superfluous arguments when filename given\n", argv[0]); + exit(-1); + } + + FILE *f = fopen(filename, "r"); + size_t bufsize = 1024; + size_t n_read = 0; + size_t n; + + if (!f) { + fprintf(stderr, "%s: can't open file: %s\n", argv[0], filename); + exit(-1); + } + char *buf = malloc(bufsize); + while ((n = fread(buf, 1, bufsize, f))) { + n_read += n; + if (n == bufsize) + buf = realloc(buf, bufsize); + } + fclose(f); + if (n_read) { + o = cJSON_Parse(buf); + free(buf); + if (!o) { + fprintf(stderr, "%s: Failed parsing JSON input: %s\n", argv[0], cJSON_GetErrorPtr()); + exit(-1); + } + } + } + + if (!o) { + fprintf(stderr, "%s: Failed parsing JSON input\n", argv[0]); + exit(-1); + } + + if (vac_connect("vat2", 0, 0, 1024)) { + fprintf(stderr, "Failed connecting to VPP\n"); + exit(-1); + } + if (!p) { + fprintf(stderr, "No such command\n"); + exit(-1); + } + + cJSON * (*fp) (cJSON *); + fp = (void *) p[0]; + cJSON *r = (*fp) (o); + + if (o) + cJSON_Delete(o); + + if (r) { + char *output = cJSON_Print(r); + cJSON_Delete(r); + printf("%s\n", output); + free(output); + } else { + fprintf(stderr, "Call failed\n"); + exit(-1); + } + + vac_disconnect(); + exit (0); + +} diff --git a/src/vat2/plugin.c b/src/vat2/plugin.c new file mode 100644 index 00000000000..6b6d55ac9b0 --- /dev/null +++ b/src/vat2/plugin.c @@ -0,0 +1,195 @@ +/* + * Copyright (c) 2020 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include +#include +#include +#include +#include +#include +#include "vat2.h" + +typedef struct +{ + u8 *name; + u8 *filename; + struct stat file_info; + void *handle; +} plugin_info_t; + +/* loaded plugin info */ +plugin_info_t *plugin_info; + +static int +load_one_plugin (plugin_info_t * pi) +{ + void *handle, *register_handle; + clib_error_t *(*fp) (void); + clib_error_t *error; + + handle = dlopen ((char *) pi->name, RTLD_LAZY); + + /* + * Note: this can happen if the plugin has an undefined symbol reference, + * so print a warning. Otherwise, the poor slob won't know what happened. + * Ask me how I know that... + */ + if (handle == 0) + { + clib_warning ("%s", dlerror ()); + return -1; + } + + pi->handle = handle; + + register_handle = dlsym (pi->handle, "vat2_register_plugin"); + if (register_handle == 0) + { + clib_warning ("%s: symbol vat2_register_plugin not found", pi->name); + dlclose (handle); + return -1; + } + + fp = register_handle; + + error = (*fp) (); + + if (error) + { + clib_error_report (error); + dlclose (handle); + return -1; + } + + return 0; +} + +static u8 ** +split_plugin_path (char *plugin_path) +{ + int i; + u8 **rv = 0; + u8 *path = (u8 *) plugin_path; + u8 *this = 0; + + for (i = 0; i < vec_len (plugin_path); i++) + { + if (path[i] != ':') + { + vec_add1 (this, path[i]); + continue; + } + vec_add1 (this, 0); + vec_add1 (rv, this); + this = 0; + } + if (this) + { + vec_add1 (this, 0); + vec_add1 (rv, this); + } + return rv; +} + +int +vat2_load_plugins (char *path, char *filter, int *loaded) +{ + DIR *dp; + struct dirent *entry; + struct stat statb; + uword *p; + plugin_info_t *pi; + u8 **plugin_path; + int i; + int res = 0; + uword *plugin_by_name_hash = hash_create_string (0, sizeof (uword)); + + *loaded = 0; + plugin_path = split_plugin_path (path); + + for (i = 0; i < vec_len (plugin_path); i++) + { + DBG ("Opening path: %s\n", plugin_path[i]); + dp = opendir ((char *) plugin_path[i]); + + if (dp == 0) + continue; + + while ((entry = readdir (dp))) + { + u8 *plugin_name; + + if (filter) + { + int j; + for (j = 0; j < vec_len (filter); j++) + if (entry->d_name[j] != filter[j]) + goto next; + } + + plugin_name = format (0, "%s/%s%c", plugin_path[i], + entry->d_name, 0); + + /* unreadable */ + if (stat ((char *) plugin_name, &statb) < 0) + { + ignore: + vec_free (plugin_name); + continue; + } + + /* a dir or other things which aren't plugins */ + if (!S_ISREG (statb.st_mode)) + goto ignore; + + p = hash_get_mem (plugin_by_name_hash, plugin_name); + if (p == 0) + { + vec_add2 (plugin_info, pi, 1); + pi->name = plugin_name; + pi->file_info = statb; + + if (load_one_plugin (pi)) + { + res = -1; + vec_free (plugin_name); + _vec_len (plugin_info) = vec_len (plugin_info) - 1; + continue; + } + clib_memset (pi, 0, sizeof (*pi)); + hash_set_mem (plugin_by_name_hash, plugin_name, + pi - plugin_info); + *loaded = *loaded + 1; + } + next: + ; + } + closedir (dp); + vec_free (plugin_path[i]); + } + vec_free (plugin_path); + return res; +} + +#define QUOTE_(x) #x +#define QUOTE(x) QUOTE_(x) + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ diff --git a/src/vat2/vat2.h b/src/vat2/vat2.h new file mode 100644 index 00000000000..d477b7279b3 --- /dev/null +++ b/src/vat2/vat2.h @@ -0,0 +1,12 @@ +#ifndef included_vat2_h +#define included_vat2_h + +#include + +extern bool debug; + +#define DBG(fmt, args...) do {if (debug) fprintf(stderr, fmt, ## args); } while(0) +#define ERR(fmt, args...) fprintf(stderr, "VAT2: %s:%d:%s(): " fmt, \ + __FILE__, __LINE__, __func__, ##args) + +#endif diff --git a/src/vat2/vat2_helpers.h b/src/vat2/vat2_helpers.h new file mode 100644 index 00000000000..929c012485f --- /dev/null +++ b/src/vat2/vat2_helpers.h @@ -0,0 +1,34 @@ +/* + * Copyright (c) 2020 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef included_vat2_helpers_h +#define included_vat2_helpers_h + +/* For control ping */ +#define vl_endianfun +#include +#undef vl_endianfun + +static inline void +vat2_control_ping (u32 context) +{ + vl_api_control_ping_t mp = {0}; + mp._vl_msg_id = vac_get_msg_index(VL_API_CONTROL_PING_CRC); + mp.context = context; + vl_api_control_ping_t_endian(&mp); + vac_write((char *)&mp, sizeof(mp)); +} + +#endif -- cgit 1.2.3-korg