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net: lwip: provide net_start_again()

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Implement net_start_again() when NET_LWIP=y in a very similar way to
NET. This will be used in a future commit to determine if a failed
ping needs to be tried again on a different interface.

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Jerome Forissier
2025-04-15 23:17:37 +02:00
parent 5666865dec
commit 761fe6719c
3 changed files with 44 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/net-common.h
View File

@@ -471,6 +471,9 @@ static inline struct in_addr env_get_ip(char *var)
int net_init(void);
/* Called when a network operation fails to know if it should be re-tried */
int net_start_again(void);
/* NET compatibility */
enum proto_t;
int net_loop(enum proto_t protocol);

3
include/net-legacy.h
View File

@@ -347,9 +347,6 @@ extern int net_ntp_time_offset; /* offset time from UTC */
int net_loop(enum proto_t);
/* Load failed. Start again. */
int net_start_again(void);
/* Get size of the ethernet header when we send */
int net_eth_hdr_size(void);

41
net/lwip/net-lwip.c
View File

@@ -21,6 +21,8 @@
#if defined(CONFIG_API) || defined(CONFIG_EFI_LOADER)
void (*push_packet)(void *, int len) = 0;
#endif
static int net_try_count;
static int net_restarted;
int net_restart_wrap;
static uchar net_pkt_buf[(PKTBUFSRX) * PKTSIZE_ALIGN + PKTALIGN];
uchar *net_rx_packets[PKTBUFSRX];
@@ -339,3 +341,42 @@ u32_t sys_now(void)
{
return get_timer(0);
}
int net_start_again(void)
{
char *nretry;
int retry_forever = 0;
unsigned long retrycnt = 0;
nretry = env_get("netretry");
if (nretry) {
if (!strcmp(nretry, "yes"))
retry_forever = 1;
else if (!strcmp(nretry, "no"))
retrycnt = 0;
else if (!strcmp(nretry, "once"))
retrycnt = 1;
else
retrycnt = simple_strtoul(nretry, NULL, 0);
} else {
retrycnt = 0;
retry_forever = 0;
}
if ((!retry_forever) && (net_try_count > retrycnt)) {
eth_halt();
/*
* We don't provide a way for the protocol to return an error,
* but this is almost always the reason.
*/
return -ETIMEDOUT;
}
net_try_count++;
eth_halt();
#if !defined(CONFIG_NET_DO_NOT_TRY_ANOTHER)
eth_try_another(!net_restarted);
#endif
return eth_init();
}