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Improve kore_strlcpy().

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Make it return the original length of the input string so the caller
can check for truncation. Also guard against len being 0 as this would
not do anything with the destination string (not even NUL terminate it).
This commit is contained in:
Joris Vink 2016-07-04 11:41:37 +02:00
parent 589c7667be
commit 27acc51241
4 changed files with 27 additions and 12 deletions
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2
includes/kore.h
View File

@ -522,7 +522,7 @@ char *kore_time_to_date(time_t);
char *kore_strdup(const char *);
void kore_log(int, const char *, ...);
u_int64_t kore_strtonum64(const char *, int, int *);
void kore_strlcpy(char *, const char *, size_t);
size_t kore_strlcpy(char *, const char *, const size_t);
void kore_server_disconnect(struct connection *);
int kore_split_string(char *, char *, char **, size_t);
void kore_strip_chars(char *, const char, char **);

19
src/accesslog.c
View File

@ -101,7 +101,7 @@ kore_accesslog_write(const void *data, u_int32_t len)
if (inet_ntop(logpacket.addrtype, &(logpacket.addr),
addr, sizeof(addr)) == NULL)
kore_strlcpy(addr, "unknown", sizeof(addr));
(void)kore_strlcpy(addr, "unknown", sizeof(addr));
time(&now);
tbuf = kore_time_to_date(now);
@ -150,14 +150,21 @@ kore_accesslog(struct http_request *req)
logpacket.worker_id = worker->id;
logpacket.worker_cpu = worker->cpu;
logpacket.time_req = req->total;
kore_strlcpy(logpacket.host, req->host, sizeof(logpacket.host));
kore_strlcpy(logpacket.path, req->path, sizeof(logpacket.path));
if (kore_strlcpy(logpacket.host,
req->host, sizeof(logpacket.host)) >= sizeof(logpacket.host))
kore_log(LOG_NOTICE, "kore_accesslog: host truncated");
if (kore_strlcpy(logpacket.path,
req->path, sizeof(logpacket.path)) >= sizeof(logpacket.path))
kore_log(LOG_NOTICE, "kore_accesslog: path truncated");
if (req->agent != NULL) {
kore_strlcpy(logpacket.agent,
req->agent, sizeof(logpacket.agent));
if (kore_strlcpy(logpacket.agent, req->agent,
sizeof(logpacket.agent)) >= sizeof(logpacket.agent))
kore_log(LOG_NOTICE, "kore_accesslog: agent truncated");
} else {
kore_strlcpy(logpacket.agent, "unknown",
(void)kore_strlcpy(logpacket.agent, "unknown",
sizeof(logpacket.agent));
}

2
src/mem.c
View File

@ -122,7 +122,7 @@ kore_strdup(const char *str)
len = strlen(str) + 1;
nstr = kore_malloc(len);
kore_strlcpy(nstr, str, len);
(void)kore_strlcpy(nstr, str, len);
return (nstr);
}

16
src/utils.c
View File

@ -81,7 +81,7 @@ kore_log(int prio, const char *fmt, ...)
(void)snprintf(tmp, sizeof(tmp), "wrk %d", worker->id);
#if !defined(KORE_NO_TLS)
if (worker->id == KORE_WORKER_KEYMGR)
kore_strlcpy(tmp, "keymgr", sizeof(tmp));
(void)kore_strlcpy(tmp, "keymgr", sizeof(tmp));
#endif
if (foreground)
printf("[%s]: %s\n", tmp, buf);
@ -95,13 +95,16 @@ kore_log(int prio, const char *fmt, ...)
}
}
void
kore_strlcpy(char *dst, const char *src, size_t len)
size_t
kore_strlcpy(char *dst, const char *src, const size_t len)
{
char *d = dst;
const char *s = src;
const char *end = dst + len - 1;
if (len == 0)
fatal("kore_strlcpy: len == 0");
while ((*d = *s) != '\0') {
if (d == end) {
*d = '\0';
@ -111,6 +114,11 @@ kore_strlcpy(char *dst, const char *src, size_t len)
d++;
s++;
}
while (*s != '\0')
s++;
return (s - src);
}
int
@ -416,7 +424,7 @@ kore_base64_encode(u_int8_t *data, u_int32_t len, char **out)
pdata = kore_buf_release(res, &plen);
*out = kore_malloc(plen + 1);
kore_strlcpy(*out, (char *)pdata, plen + 1);
(void)kore_strlcpy(*out, (char *)pdata, plen + 1);
kore_mem_free(pdata);
return (KORE_RESULT_OK);