Re: [PATCH v9 01/16] net: introduce convert_host_port()

[David Gibson <david@gibson.dropbear.id.au>]

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On Mon, Sep 26, 2022 at 09:50:33PM +0200, Laurent Vivier wrote:
> Signed-off-by: Laurent Vivier <lvivier@redhat.com>
> Reviewed-by: Stefano Brivio <sbrivio@redhat.com>

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

> ---
>  include/qemu/sockets.h |  2 ++
>  net/net.c              | 62 ++++++++++++++++++++++--------------------
>  2 files changed, 34 insertions(+), 30 deletions(-)
> 
> diff --git a/include/qemu/sockets.h b/include/qemu/sockets.h
> index 038faa157f59..47194b9732f8 100644
> --- a/include/qemu/sockets.h
> +++ b/include/qemu/sockets.h
> @@ -47,6 +47,8 @@ void socket_listen_cleanup(int fd, Error **errp);
>  int socket_dgram(SocketAddress *remote, SocketAddress *local, Error **errp);
>  
>  /* Old, ipv4 only bits.  Don't use for new code. */
> +int convert_host_port(struct sockaddr_in *saddr, const char *host,
> +                      const char *port, Error **errp);
>  int parse_host_port(struct sockaddr_in *saddr, const char *str,
>                      Error **errp);
>  int socket_init(void);
> diff --git a/net/net.c b/net/net.c
> index 2db160e0634d..d2288bd3a929 100644
> --- a/net/net.c
> +++ b/net/net.c
> @@ -66,55 +66,57 @@ static QTAILQ_HEAD(, NetClientState) net_clients;
>  /***********************************************************/
>  /* network device redirectors */
>  
> -int parse_host_port(struct sockaddr_in *saddr, const char *str,
> -                    Error **errp)
> +int convert_host_port(struct sockaddr_in *saddr, const char *host,
> +                      const char *port, Error **errp)
>  {
> -    gchar **substrings;
>      struct hostent *he;
> -    const char *addr, *p, *r;
> -    int port, ret = 0;
> +    const char *r;
> +    long p;
>  
>      memset(saddr, 0, sizeof(*saddr));
>  
> -    substrings = g_strsplit(str, ":", 2);
> -    if (!substrings || !substrings[0] || !substrings[1]) {
> -        error_setg(errp, "host address '%s' doesn't contain ':' "
> -                   "separating host from port", str);
> -        ret = -1;
> -        goto out;
> -    }
> -
> -    addr = substrings[0];
> -    p = substrings[1];
> -
>      saddr->sin_family = AF_INET;
> -    if (addr[0] == '\0') {
> +    if (host[0] == '\0') {
>          saddr->sin_addr.s_addr = 0;
>      } else {
> -        if (qemu_isdigit(addr[0])) {
> -            if (!inet_aton(addr, &saddr->sin_addr)) {
> +        if (qemu_isdigit(host[0])) {
> +            if (!inet_aton(host, &saddr->sin_addr)) {
>                  error_setg(errp, "host address '%s' is not a valid "
> -                           "IPv4 address", addr);
> -                ret = -1;
> -                goto out;
> +                           "IPv4 address", host);
> +                return -1;
>              }
>          } else {
> -            he = gethostbyname(addr);
> +            he = gethostbyname(host);
>              if (he == NULL) {
> -                error_setg(errp, "can't resolve host address '%s'", addr);
> -                ret = -1;
> -                goto out;
> +                error_setg(errp, "can't resolve host address '%s'", host);
> +                return -1;
>              }
>              saddr->sin_addr = *(struct in_addr *)he->h_addr;
>          }
>      }
> -    port = strtol(p, (char **)&r, 0);
> -    if (r == p) {
> -        error_setg(errp, "port number '%s' is invalid", p);
> +    if (qemu_strtol(port, &r, 0, &p) != 0) {
> +        error_setg(errp, "port number '%s' is invalid", port);
> +        return -1;
> +    }
> +    saddr->sin_port = htons(p);
> +    return 0;
> +}
> +
> +int parse_host_port(struct sockaddr_in *saddr, const char *str,
> +                    Error **errp)
> +{
> +    gchar **substrings;
> +    int ret;
> +
> +    substrings = g_strsplit(str, ":", 2);
> +    if (!substrings || !substrings[0] || !substrings[1]) {
> +        error_setg(errp, "host address '%s' doesn't contain ':' "
> +                   "separating host from port", str);
>          ret = -1;
>          goto out;
>      }
> -    saddr->sin_port = htons(port);
> +
> +    ret = convert_host_port(saddr, substrings[0], substrings[1], errp);
>  
>  out:
>      g_strfreev(substrings);

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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