78 lines
4.2 KiB
C
78 lines
4.2 KiB
C
#include "zh_syslog.h"
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static const char *TAG = "zh_syslog";
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#define ZH_LOGI(msg, ...) ESP_LOGI(TAG, msg, ##__VA_ARGS__)
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#define ZH_LOGE(msg, err, ...) ESP_LOGE(TAG, "[%s:%d:%s] " msg, __FILE__, __LINE__, esp_err_to_name(err), ##__VA_ARGS__)
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#define ZH_ERROR_CHECK(cond, err, cleanup, msg, ...) \
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if (!(cond)) \
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{ \
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ZH_LOGE(msg, err, ##__VA_ARGS__); \
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cleanup; \
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return err; \
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}
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static struct sockaddr_in _syslog_server = {0};
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volatile static int _socket = -1;
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volatile static bool _is_initialized = false;
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esp_err_t zh_syslog_init(const zh_syslog_init_config_t *config)
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{
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ESP_LOGI(TAG, "Syslog client initialization begin.");
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ZH_ERROR_CHECK(config != NULL, ESP_ERR_INVALID_ARG, NULL, "Syslog client initialization fail. Invalid argument.");
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ZH_ERROR_CHECK(_is_initialized == false, ESP_ERR_INVALID_STATE, NULL, "Syslog client initialization fail. Syslog client already initialized.");
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ZH_ERROR_CHECK(config->syslog_port != 0 && config->syslog_port <= 65535, ESP_ERR_INVALID_ARG, NULL, "Syslog client initialization fail. Invalid argument.");
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ZH_ERROR_CHECK(memchr(config->syslog_ip, '\0', sizeof(config->syslog_ip)) != NULL, ESP_ERR_INVALID_ARG, NULL, "Syslog client initialization fail. Invalid IP.");
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struct in_addr addr;
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ZH_ERROR_CHECK(inet_pton(AF_INET, config->syslog_ip, &addr) == 1, ESP_ERR_INVALID_ARG, NULL, "Syslog client initialization fail. Invalid argument.");
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_syslog_server.sin_addr = addr;
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_syslog_server.sin_family = AF_INET;
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_syslog_server.sin_port = htons((uint16_t)config->syslog_port);
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_socket = socket(AF_INET, SOCK_DGRAM, 0);
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ZH_ERROR_CHECK(_socket >= 0, ESP_FAIL, NULL, "Syslog client initialization fail. Create socket error.");
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_is_initialized = true;
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ESP_LOGI(TAG, "Syslog client initialization success.");
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return ESP_OK;
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}
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esp_err_t zh_syslog_deinit(void)
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{
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ESP_LOGI(TAG, "Syslog client deinitialization begin.");
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ZH_ERROR_CHECK(_is_initialized == true, ESP_ERR_INVALID_STATE, NULL, "Syslog client deinitialization fail. Syslog client not initialized.");
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close(_socket);
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_socket = -1;
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_is_initialized = false;
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ESP_LOGI(TAG, "Syslog client deinitialization success.");
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return ESP_OK;
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}
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esp_err_t zh_syslog_send(const zh_syslog_facility_code_t facility, const zh_syslog_severity_code_t severity, const char *hostname, const char *app_name, const char *message)
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{
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ESP_LOGI(TAG, "Syslog client send begin.");
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ZH_ERROR_CHECK(hostname != NULL && app_name != NULL && message != NULL, ESP_ERR_INVALID_ARG, NULL, "Syslog client send fail. Invalid argument.");
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ZH_ERROR_CHECK(_is_initialized == true, ESP_ERR_INVALID_STATE, NULL, "Syslog client send fail. Syslog client not initialized.");
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ZH_ERROR_CHECK(facility >= ZH_KERN && facility <= ZH_LOCAL7 && severity >= ZH_EMERG && severity <= ZH_DEBUG, ESP_ERR_INVALID_ARG, NULL, "Syslog client send fail. Invalid argument.");
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const int pri = ((uint8_t)facility * 8) + (uint8_t)severity;
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char stack_buf[256];
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int len = snprintf(stack_buf, sizeof(stack_buf), "<%d>1 - %s %s - - - %s", pri, hostname, app_name, message);
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ZH_ERROR_CHECK(len >= 0, ESP_FAIL, NULL, "Syslog client send fail. Format error.");
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char *payload = stack_buf;
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bool heap_allocated = false;
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if (len >= sizeof(stack_buf))
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{
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payload = heap_caps_calloc(1, len + 1, MALLOC_CAP_8BIT);
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ZH_ERROR_CHECK(payload != NULL, ESP_ERR_NO_MEM, NULL, "Syslog client send fail. Memory allocation fail or no free memory in the heap.");
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int written = snprintf(payload, len + 1, "<%d>1 - %s %s - - - %s", pri, hostname, app_name, message);
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ZH_ERROR_CHECK(written == len, ESP_FAIL, heap_caps_free(payload), "Syslog client send fail. Format error.");
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heap_allocated = true;
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}
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int sent = sendto(_socket, payload, len, 0, (struct sockaddr *)&_syslog_server, sizeof(_syslog_server));
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if (heap_allocated == true)
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{
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heap_caps_free(payload);
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}
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ZH_ERROR_CHECK(sent == len, ESP_FAIL, NULL, "Syslog client send fail. Socket error.");
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ESP_LOGI(TAG, "Syslog client send success.");
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return ESP_OK;
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} |