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/*
* Copyright (c) 2018 HUACHENTEL 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 <scvpp/comm.h>
#include <stdio.h>
#include <dirent.h>
#define APP_NAME "sweetcomb_vpp"
#define MAX_OUTSTANDING_REQUESTS 4
#define RESPONSE_QUEUE_SIZE 2
sc_vpp_main_t sc_vpp_main = {
.vapi_ctx = NULL,
.vapi_mode = VAPI_MODE_BLOCKING,
.pid = 0
};
sc_vpp_main_t *sc_connect_vpp()
{
vapi_error_e rv;
if (sc_vpp_main.vapi_ctx == NULL) {
if ((rv = vapi_ctx_alloc(&sc_vpp_main.vapi_ctx)) != VAPI_OK) {
return NULL;
}
if ((rv =
vapi_connect(sc_vpp_main.vapi_ctx, APP_NAME, NULL,
MAX_OUTSTANDING_REQUESTS, RESPONSE_QUEUE_SIZE,
sc_vpp_main.vapi_mode, true)) != VAPI_OK) {
vapi_ctx_free(sc_vpp_main.vapi_ctx);
sc_vpp_main.vapi_ctx = NULL;
return NULL;
}
}
sc_vpp_main.pid = sc_get_vpp_pid();
pthread_mutex_init(&sc_vpp_main.vapi_lock, NULL);
return &sc_vpp_main;
}
void sc_disconnect_vpp()
{
if (NULL != sc_vpp_main.vapi_ctx) {
pthread_mutex_destroy(&sc_vpp_main.vapi_lock);
sc_vpp_main.pid = 0;
vapi_disconnect(sc_vpp_main.vapi_ctx);
vapi_ctx_free(sc_vpp_main.vapi_ctx);
sc_vpp_main.vapi_ctx = NULL;
}
}
/* get vpp pid in system */
pid_t sc_get_vpp_pid()
{
DIR *dir;
struct dirent *ptr;
FILE *fp;
char cmdline_path[PATH_MAX];
char cmdline_data[PATH_MAX];
const char vpp_path[] = "/usr/bin/vpp";
dir = opendir("/proc");
pid_t pid = 0;
/* read vpp pid file in proc, return pid of vpp */
if (NULL != dir) {
while (NULL != (ptr = readdir(dir))) {
if ((0 == strcmp(ptr->d_name, "."))
|| (0 == strcmp(ptr->d_name, ".."))) {
continue;
}
if (DT_DIR != ptr->d_type) {
continue;
}
sprintf(cmdline_path, "/proc/%s/cmdline", ptr->d_name);
fp = fopen(cmdline_path, "r");
if (NULL != fp) {
fread(cmdline_data, 1, sizeof(vpp_path), fp);
cmdline_data[sizeof(vpp_path) - 1] = '\0';
if (cmdline_data ==
strstr(cmdline_data, "/usr/bin/vpp")) {
pid = atoi(ptr->d_name);
}
fclose(fp);
}
}
closedir(dir);
}
return pid;
}
int sc_end_with(const char* str, const char* end)
{
if (str != NULL && end != NULL)
{
int l1 = strlen(str);
int l2 = strlen(end);
if (l1 >= l2)
{
if (strcmp(str + l1 - l2, end) == 0)
return 1;
}
}
return 0;
}
int sc_aton(const char *cp, u8 * buf, size_t length)
{
ARG_CHECK2(false, cp, buf);
struct in_addr addr;
int ret = inet_aton(cp, &addr);
if (0 == ret)
return -EINVAL;
if (sizeof(addr) > length)
return -EINVAL;
memcpy(buf, &addr, sizeof (addr));
return 0;
}
char* sc_ntoa(const u8 * buf)
{
ARG_CHECK(NULL, buf);
struct in_addr addr;
memcpy(&addr, buf, sizeof(addr));
return inet_ntoa(addr);
}
int sc_pton(int af, const char *cp, u8 * buf)
{
ARG_CHECK2(false, cp, buf);
int ret = inet_pton(af, cp, buf);
if (0 == ret)
return -EINVAL;
return 0;
}
const char* sc_ntop(int af, const u8 * buf, char *addr)
{
ARG_CHECK(NULL, buf);
ARG_CHECK(NULL, addr);
socklen_t size = 0;
if (af == AF_INET)
size = INET_ADDRSTRLEN;
else if (af == AF_INET6)
size = INET6_ADDRSTRLEN;
else
return NULL;
return inet_ntop(af, (void*)buf, addr, size);
}
/**
* @brief Function converts the u8 array from network byte order to host byte order.
*
* @param[in] host IPv4 address.
* @return host byte order value.
*/
uint32_t hardntohlu32(uint8_t host[4])
{
uint32_t tmp = host[3] | host[2] | host[1] | host[0];
return ntohl(tmp);
}
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