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add osmo_sockaddr_from/to_octets() 

Shorthand for the INET/INET6 switch() to get/put the addr part, useful
for encoding and decoding message buffers.

Related: OS#5599
Change-Id: Ie9e33bfac525c59c30714663d2bfcc62ec9eeb81
changes/50/27050/2
Neels Hofmeyr 2022-02-02 03:08:40 +01:00
parent 1633735e9b
commit cf7f7924d2
2 changed files with 62 additions and 0 deletions
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3
include/osmocom/core/socket.h
View File

@ -127,6 +127,9 @@ int osmo_sockaddr_local_ip(struct osmo_sockaddr *local_ip,
int osmo_sockaddr_cmp(const struct osmo_sockaddr *a,
const struct osmo_sockaddr *b);
int osmo_sockaddr_to_octets(uint8_t *dst, size_t dst_maxlen, const struct osmo_sockaddr *os);
int osmo_sockaddr_from_octets(struct osmo_sockaddr *os, const void *src, size_t src_len);
const char *osmo_sockaddr_to_str(const struct osmo_sockaddr *sockaddr);
char *osmo_sockaddr_to_str_buf(char *buf, size_t buf_len,
const struct osmo_sockaddr *sockaddr);

59
src/socket.c
View File

@ -1733,6 +1733,65 @@ int osmo_sockaddr_local_ip(struct osmo_sockaddr *local_ip, const struct osmo_soc
return rc;
}
/*! Copy the addr part, the IP address octets in network byte order, to a buffer.
* Useful for encoding network protocols.
* \param[out] dst Write octets to this buffer.
* \param[in] dst_maxlen Space available in buffer.
* \param[in] os Sockaddr to copy IP of.
* \return nr of octets written on success, negative on error.
*/
int osmo_sockaddr_to_octets(uint8_t *dst, size_t dst_maxlen, const struct osmo_sockaddr *os)
{
const void *addr;
size_t len;
switch (os->u.sin.sin_family) {
case AF_INET:
addr = &os->u.sin.sin_addr;
len = sizeof(os->u.sin.sin_addr);
break;
case AF_INET6:
addr = &os->u.sin6.sin6_addr;
len = sizeof(os->u.sin6.sin6_addr);
break;
default:
return -ENOTSUP;
}
if (dst_maxlen < len)
return -ENOSPC;
memcpy(dst, addr, len);
return len;
}
/*! Copy the addr part, the IP address octets in network byte order, from a buffer.
* Useful for decoding network protocols.
* \param[out] os Write IP address to this sockaddr.
* \param[in] src Source buffer to read IP address octets from.
* \param[in] src_len Number of octets to copy.
* \return number of octets read on success, negative on error.
*/
int osmo_sockaddr_from_octets(struct osmo_sockaddr *os, const void *src, size_t src_len)
{
void *addr;
size_t len;
*os = (struct osmo_sockaddr){0};
switch (src_len) {
case sizeof(os->u.sin.sin_addr):
os->u.sin.sin_family = AF_INET;
addr = &os->u.sin.sin_addr;
len = sizeof(os->u.sin.sin_addr);
break;
case sizeof(os->u.sin6.sin6_addr):
os->u.sin6.sin6_family = AF_INET6;
addr = &os->u.sin6.sin6_addr;
len = sizeof(os->u.sin6.sin6_addr);
break;
default:
return -ENOTSUP;
}
memcpy(addr, src, len);
return len;
}
/*! Compare two osmo_sockaddr.
* \param[in] a
* \param[in] b