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Add sock_resolve_required #356

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Add sock_resolve_required #356

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4036498
Add sock_resolve_required()
gperciva May 13, 2022
bed8cb1
Use sock_resolve_required()
gperciva May 13, 2022
fb80b5d
Expand sock_resolve_required()
gperciva May 13, 2022
ec2cef1
use more complicated form of sock_resolve_required()
gperciva May 13, 2022
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Add sock_resolve_required()
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@gperciva
gperciva committed May 13, 2022
commit 4036498c6e8eceeba923c26b7ea8f81ca1078a4b
32 changes: 32 additions & 0 deletions libcperciva/util/sock.c
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Original file line number Diff line number Diff line change
Expand Up @@ -296,6 +296,38 @@ sock_resolve(const char * addr)
return (NULL);
}

/**
* sock_resolve_required(addr):
* Return a NULL-terminated array of pointers to sock_addr structures.
* If the array would be empty, print an error and return NULL instead.
*/
struct sock_addr **
sock_resolve_required(const char * addr)
{
struct sock_addr ** sas;

/* Resolve target address. */
if ((sas = sock_resolve(addr)) == NULL) {
warnp("Error resolving socket address: %s", addr);
goto err0;
}

/* Check that the array is not empty. */
if (sas[0] == NULL) {
warn0("No addresses found for %s", addr);
goto err1;
}

/* Success! */
return (sas);

err1:
sock_addr_freelist(sas);
err0:
/* Failure! */
return (NULL);
}

/**
* sock_listener(sa):
* Create a socket, attempt to set SO_REUSEADDR, bind it to the socket address
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7 changes: 7 additions & 0 deletions libcperciva/util/sock.h
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,13 @@ struct sock_addr;
*/
struct sock_addr ** sock_resolve(const char *);

/**
* sock_resolve_required(addr):
* Return a NULL-terminated array of pointers to sock_addr structures.
* If the array would be empty, print an error and return NULL instead.
*/
struct sock_addr ** sock_resolve_required(const char *);

/**
* sock_listener(sa):
* Create a socket, attempt to set SO_REUSEADDR, bind it to the socket address
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