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Update multiaddr helper 

* use osmo_strbuf instead of plain buffer
* properly handle OOM
* remove default "0.0.0.0" on empty input
* fix missing trailing ')'

Related: OS#5581
Change-Id: Icef53fe4b6e51563d97a1bc48001d67679b3b6e9
changes/93/28993/10
Max 2022-09-08 18:45:07 +07:00
parent 395db204b4
commit 4deeff9f87
1 changed files with 49 additions and 22 deletions
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71
src/socket.c
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@ -202,38 +202,65 @@ static int socket_helper_osa(const struct osmo_sockaddr *addr, uint16_t type, ui
}
#ifdef HAVE_LIBSCTP
/* Fill buf with a string representation of the address set, in the form:
* buf_len == 0: "()"
* buf_len == 1: "hostA"
* buf_len >= 2: (hostA|hostB|...|...)
/* Fill osmo_strbuf with a string representation of the address set, in the form:
* count == 0: "()"
* count == 1: "hostA"
* count >= 2: (hostA|hostB|...|...)
* where count is either host_count or addrs_count
*/
static int multiaddr_snprintf(char* buf, size_t buf_len, const char **hosts, size_t host_cnt)
static int multiaddr_strbuf(struct osmo_strbuf *sb,
const char **hosts, size_t host_count,
struct sockaddr **addrs, size_t addrs_count)
{
int len = 0, offset = 0, rem = buf_len;
size_t i;
int ret;
bool use_hosts = hosts ? true : false;
size_t count = use_hosts ? host_count : addrs_count;
struct osmo_sockaddr_str t;
struct osmo_sockaddr_str *oss = &t;
char *after;
int rc;
if (buf_len < 3)
return -EINVAL;
if (sb->len < 3)
return -ENOMEM;
if (host_cnt != 1) {
ret = snprintf(buf, rem, "(");
if (ret < 0)
return ret;
OSMO_SNPRINTF_RET(ret, rem, offset, len);
}
for (i = 0; i < host_cnt; i++) {
if (host_cnt == 1)
if (count != 1)
OSMO_STRBUF_PRINTF(*sb, "(");
for (size_t i = 0; i < count; i++) {
const struct sockaddr *addr = &(*addrs)[i];
if (count == 1)
after = "";
else
after = (i == (host_cnt - 1)) ? ")" : "|";
ret = snprintf(buf + offset, rem, "%s%s", hosts[i] ? : "0.0.0.0", after);
OSMO_SNPRINTF_RET(ret, rem, offset, len);
after = (i == (count - 1)) ? ")" : "|";
if (use_hosts) {
if (hosts[i])
OSMO_STRBUF_PRINTF(*sb, "%s%s", hosts[i], after);
} else {
rc = osmo_sockaddr_str_from_sockaddr(oss, (const struct sockaddr_storage *)addr);
if (rc < 0)
return rc;
OSMO_STRBUF_PRINTF(*sb, "%s%s", oss->ip, after);
}
}
return len;
if (count == 0)
OSMO_STRBUF_PRINTF(*sb, ")");
if (sb->chars_needed >= sb->len)
return -ENOSPC;
return sb->chars_needed;
}
static int multiaddr_snprintf(char* buf, size_t buf_len, const char **hosts, size_t host_cnt)
{
struct osmo_strbuf sb = { .buf = buf, .len = buf_len };
return multiaddr_strbuf(&sb, hosts, host_cnt, NULL, 0);
}
#endif /* HAVE_LIBSCTP */
static int osmo_sock_init_tail(int fd, uint16_t type, unsigned int flags)