88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
/**
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* sesimos - secure, simple, modern web server
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* @brief Error interface
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* @file src/lib/error.c
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* @author Lorenz Stechauner
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* @date 2023-01-08
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*/
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#include "error.h"
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#include "../logger.h"
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#include <errno.h>
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#include <string.h>
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#include <netdb.h>
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extern const char *sock_error_str(unsigned long err);
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extern const char *http_error_str(int err);
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extern const char *MMDB_strerror(int err);
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extern const char *ERR_reason_error_string(unsigned long err);
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static int error_compress(unsigned long err) {
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int comp = ((int) err & 0xFFFF) | (((int) err >> 8) & 0xFF0000);
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if (err & 0xFF0000) warning("Lossy error code compression! (%08lX -> %08X)", err, comp);
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return comp;
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}
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static unsigned long error_decompress(int err) {
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return (err & 0xFFFF) | ((err << 8) & 0xFF000000);
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}
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const char *error_str(int err_no, char *buf, int buf_len) {
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buf[0] = 0;
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int e = err_no & 0x00FFFFFF;
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switch (err_no >> 24) {
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case 0x00: return strerror_r(e, buf, buf_len);
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case 0x01: return sock_error_str(error_decompress(e));
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case 0x02: return ERR_reason_error_string(error_decompress(e));
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case 0x03: return MMDB_strerror(e);
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case 0x04: return http_error_str(e);
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case 0x05: return gai_strerror(e);
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}
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return buf;
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}
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void error_ssl(unsigned long err) {
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errno = 0x01000000 | error_compress(err);
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}
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void error_ssl_err(unsigned long err) {
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errno = 0x02000000 | error_compress(err);
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}
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void error_mmdb(int err) {
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errno = 0x03000000 | err;
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}
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void error_http(int err) {
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errno = 0x04000000 | err;
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}
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void error_gai(int err) {
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errno = 0x05000000 | err;
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}
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static int error_get(unsigned char prefix) {
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return (errno >> 24 != prefix) ? 0 : errno & 0x00FFFFFF;
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}
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int error_get_sys() {
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return error_get(0x00);
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}
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int error_get_ssl() {
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return error_get(0x01);
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}
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int error_get_ssl_err() {
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return error_get(0x02);
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}
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int error_get_mmdb() {
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return error_get(0x03);
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}
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int error_get_http() {
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return error_get(0x04);
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}
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