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#include "hybbx/link.h"
#include "hybbx/util.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static const char *find_kv_line(const char *payload, size_t len,
const char *key,
char *scratch, size_t scratch_len)
{
const char *cursor = payload;
const char *end = payload + len;
size_t key_len = strlen(key);
while (cursor < end) {
const char *line_end = memchr(cursor, '\n', (size_t)(end - cursor));
const char *line_stop = line_end != NULL ? line_end : end;
const char *eq = memchr(cursor, '=', (size_t)(line_stop - cursor));
if (eq != NULL && (size_t)(eq - cursor) == key_len &&
memcmp(cursor, key, key_len) == 0) {
const char *value = eq + 1;
size_t value_len = (size_t)(line_stop - value);
while (value_len > 0 &&
(value[value_len - 1] == '\r' ||
value[value_len - 1] == '\n' ||
value[value_len - 1] == ' ')) {
value_len--;
}
if (value_len >= scratch_len) {
value_len = scratch_len - 1;
}
memcpy(scratch, value, value_len);
scratch[value_len] = '\0';
return scratch;
}
if (line_end == NULL) {
break;
}
cursor = line_end + 1;
}
return NULL;
}
void hybbx_link_auth_clear(hybbx_link_auth_t *auth)
{
if (auth == NULL) {
return;
}
memset(auth, 0, sizeof(*auth));
}
size_t hybbx_link_auth_format(const hybbx_link_auth_t *auth,
char *out, size_t out_cap)
{
int n;
if (auth == NULL || out == NULL || out_cap == 0) {
return 0;
}
if (auth->password[0] == '\0' || auth->id[0] == '\0') {
return 0;
}
n = snprintf(out, out_cap,
"password=%s\nrole=%s\nid=%s\n",
auth->password,
auth->role[0] != '\0' ? auth->role : "link",
auth->id);
if (n < 0 || (size_t)n >= out_cap) {
return 0;
}
if (auth->baud > 0) {
int extra = snprintf(out + (size_t)n, out_cap - (size_t)n,
"baud=%u\n", auth->baud);
if (extra < 0 || (size_t)n + (size_t)extra >= out_cap) {
return 0;
}
n += extra;
}
if (auth->duplex == 1) {
int extra = snprintf(out + (size_t)n, out_cap - (size_t)n,
"duplex=half\n");
if (extra < 0 || (size_t)n + (size_t)extra >= out_cap) {
return 0;
}
n += extra;
} else if (auth->duplex == 2) {
int extra = snprintf(out + (size_t)n, out_cap - (size_t)n,
"duplex=full\n");
if (extra < 0 || (size_t)n + (size_t)extra >= out_cap) {
return 0;
}
n += extra;
}
if (auth->bandwidth[0] != '\0') {
int extra = snprintf(out + (size_t)n, out_cap - (size_t)n,
"bandwidth=%s\n", auth->bandwidth);
if (extra < 0 || (size_t)n + (size_t)extra >= out_cap) {
return 0;
}
n += extra;
}
if (auth->frequency_mhz[0] != '\0') {
int extra = snprintf(out + (size_t)n, out_cap - (size_t)n,
"frequency_mhz=%s\n", auth->frequency_mhz);
if (extra < 0 || (size_t)n + (size_t)extra >= out_cap) {
return 0;
}
n += extra;
}
return (size_t)n;
}
hybbx_result_t hybbx_link_auth_parse(const char *payload, size_t len,
hybbx_link_auth_t *auth)
{
char scratch[128];
if (payload == NULL || auth == NULL) {
return HYBBX_ERR_INVALID;
}
hybbx_link_auth_clear(auth);
if (find_kv_line(payload, len, "password", scratch, sizeof(scratch)) == NULL) {
return HYBBX_ERR_INVALID;
}
hybbx_strlcpy(auth->password, scratch, sizeof(auth->password));
if (find_kv_line(payload, len, "id", scratch, sizeof(scratch)) == NULL) {
return HYBBX_ERR_INVALID;
}
hybbx_strlcpy(auth->id, scratch, sizeof(auth->id));
if (find_kv_line(payload, len, "role", scratch, sizeof(scratch)) != NULL) {
hybbx_strlcpy(auth->role, scratch, sizeof(auth->role));
} else {
hybbx_strlcpy(auth->role, "link", sizeof(auth->role));
}
if (find_kv_line(payload, len, "baud", scratch, sizeof(scratch)) != NULL) {
unsigned long baud = strtoul(scratch, NULL, 10);
if (baud > 0) {
auth->baud = (unsigned)baud;
}
}
if (find_kv_line(payload, len, "duplex", scratch, sizeof(scratch)) != NULL) {
if (strcmp(scratch, "full") == 0 || strcmp(scratch, "full-duplex") == 0) {
auth->duplex = 2;
} else if (strcmp(scratch, "half") == 0 ||
strcmp(scratch, "half-duplex") == 0 ||
strcmp(scratch, "simplex") == 0) {
auth->duplex = 1;
}
}
if (find_kv_line(payload, len, "bandwidth", scratch, sizeof(scratch)) != NULL) {
hybbx_strlcpy(auth->bandwidth, scratch, sizeof(auth->bandwidth));
}
if (find_kv_line(payload, len, "frequency_mhz", scratch, sizeof(scratch)) != NULL) {
hybbx_strlcpy(auth->frequency_mhz, scratch, sizeof(auth->frequency_mhz));
} else if (find_kv_line(payload, len, "frequency", scratch,
sizeof(scratch)) != NULL) {
hybbx_strlcpy(auth->frequency_mhz, scratch, sizeof(auth->frequency_mhz));
}
return HYBBX_OK;
}
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