libnet: Move parse_tftp_args to tftp.c

To be able to re-use the libnet code in other projects (where
the rather Open Firmware specific netload.c can not be used),
the function parse_tftp_args() must be moved to another file.
The function is related to TFTP, and its prototype is already
declared in tftp.h, so the code should reside in tftp.c.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 lib/libnet/netload.c | 106 ---------------------------------------------------
 lib/libnet/tftp.c    | 104 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 104 insertions(+), 106 deletions(-)

On 07/07/17 17:13, Thomas Huth wrote:
> To be able to re-use the libnet code in other projects (where
> the rather Open Firmware specific netload.c can not be used),
> the function parse_tftp_args() must be moved to another file.
> The function is related to TFTP, and its prototype is already
> declared in tftp.h, so the code should reside in tftp.c.



Thanks, applied.



> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
>  lib/libnet/netload.c | 106 ---------------------------------------------------
>  lib/libnet/tftp.c    | 104 ++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 104 insertions(+), 106 deletions(-)
> 
> diff --git a/lib/libnet/netload.c b/lib/libnet/netload.c
> index c549e69..cecb2a0 100644
> --- a/lib/libnet/netload.c
> +++ b/lib/libnet/netload.c
> @@ -17,7 +17,6 @@
>  #include <dhcpv6.h>
>  #include <ipv4.h>
>  #include <ipv6.h>
> -#include <dns.h>
>  #include <string.h>
>  #include <stdio.h>
>  #include <time.h>
> @@ -735,108 +734,3 @@ int netload(char *buffer, int len, char *ret_buffer, int huge_load,
>  
>  	return rc;
>  }
> -
> -/**
> - * Parses a tftp arguments, extracts all
> - * parameters and fills server ip according to this
> - *
> - * Parameters:
> - * @param  buffer        string with arguments,
> - * @param  server_ip	 server ip as result
> - * @param  filename	 default filename
> - * @param  fd            Socket descriptor
> - * @param  len           len of the buffer,
> - * @return               0 on SUCCESS and -1 on failure
> - */
> -int parse_tftp_args(char buffer[], char *server_ip, char filename[], int fd,
> -		    int len)
> -{
> -	char *raw;
> -	char *tmp, *tmp1;
> -	int i, j = 0;
> -	char domainname[256];
> -	uint8_t server_ip6[16];
> -
> -	raw = malloc(len);
> -	if (raw == NULL) {
> -		printf("\n unable to allocate memory, parsing failed\n");
> -		return -1;
> -	}
> -	strncpy(raw,(const char *)buffer,len);
> -	/*tftp url contains tftp://[fd00:4f53:4444:90:214:5eff:fed9:b200]/testfile*/
> -	if(strncmp(raw,"tftp://",7)){
> -		printf("\n tftp missing in %s\n",raw);
> -		free(raw);
> -		return -1;
> -	}
> -	tmp = strchr(raw,'[');
> -	if(tmp != NULL && *tmp == '[') {
> -		/*check for valid ipv6 address*/
> -		tmp1 = strchr(tmp,']');
> -		if (tmp1 == NULL) {
> -			printf("\n missing ] in %s\n",raw);
> -			free(raw);
> -			return -1;
> -		}
> -		i = tmp1 - tmp;
> -		/*look for file name*/
> -		tmp1 = strchr(tmp,'/');
> -		if (tmp1 == NULL) {
> -			printf("\n missing filename in %s\n",raw);
> -			free(raw);
> -			return -1;
> -		}
> -		tmp[i] = '\0';
> -		/*check for 16 byte ipv6 address */
> -		if (!str_to_ipv6((tmp+1), (uint8_t *)(server_ip))) {
> -			printf("\n wrong format IPV6 address in %s\n",raw);
> -			free(raw);
> -			return -1;;
> -		}
> -		else {
> -			/*found filename */
> -			strcpy(filename,(tmp1+1));
> -			free(raw);
> -			return 0;
> -		}
> -	}
> -	else {
> -		/*here tftp://hostname/testfile from option request of dhcp*/
> -		/*look for dns server name */
> -		tmp1 = strchr(raw,'.');
> -		if(tmp1 == NULL) {
> -			printf("\n missing . seperator in %s\n",raw);
> -			free(raw);
> -			return -1;
> -		}
> -		/*look for domain name beyond dns server name
> -		* so ignore the current . and look for one more
> -		*/
> -		tmp = strchr((tmp1+1),'.');
> -		if(tmp == NULL) {
> -			printf("\n missing domain in %s\n",raw);
> -			free(raw);
> -			return -1;
> -		}
> -		tmp1 = strchr(tmp1,'/');
> -		if (tmp1 == NULL) {
> -			printf("\n missing filename in %s\n",raw);
> -			free(raw);
> -			return -1;
> -		}
> -		j = tmp1 - (raw + 7);
> -		tmp = raw + 7;
> -		tmp[j] = '\0';
> -		strcpy(domainname, tmp);
> -		if (dns_get_ip(fd, domainname, server_ip6, 6) == 0) {
> -			printf("\n DNS failed for IPV6\n");
> -			return -1;
> -		}
> -		ipv6_to_str(server_ip6, server_ip);
> -
> -		strcpy(filename,(tmp1+1));
> -		free(raw);
> -		return 0;
> -	}
> -
> -}
> diff --git a/lib/libnet/tftp.c b/lib/libnet/tftp.c
> index 108092b..cda8bf3 100644
> --- a/lib/libnet/tftp.c
> +++ b/lib/libnet/tftp.c
> @@ -21,6 +21,7 @@
>  #include <ipv4.h>
>  #include <ipv6.h>
>  #include <udp.h>
> +#include <dns.h>
>  
>  //#define __DEBUG__
>  
> @@ -593,3 +594,106 @@ int tftp(filename_ip_t * _fn_ip, unsigned char *_buffer, int _len,
>  
>  	return received_len;
>  }
> +
> +/**
> + * Parses a tftp arguments, extracts all
> + * parameters and fills server ip according to this
> + *
> + * Parameters:
> + * @param  buffer        string with arguments,
> + * @param  server_ip	 server ip as result
> + * @param  filename	 default filename
> + * @param  fd            Socket descriptor
> + * @param  len           len of the buffer,
> + * @return               0 on SUCCESS and -1 on failure
> + */
> +int parse_tftp_args(char buffer[], char *server_ip, char filename[], int fd,
> +		    int len)
> +{
> +	char *raw;
> +	char *tmp, *tmp1;
> +	int i, j = 0;
> +	char domainname[256];
> +	uint8_t server_ip6[16];
> +
> +	raw = malloc(len);
> +	if (raw == NULL) {
> +		printf("\n unable to allocate memory, parsing failed\n");
> +		return -1;
> +	}
> +	strncpy(raw, (const char *)buffer, len);
> +	/* tftp url contains tftp://[fd00:4f53:4444:90:214:5eff:fed9:b200]/testfile */
> +	if (strncmp(raw, "tftp://", 7)){
> +		printf("\n tftp missing in %s\n", raw);
> +		free(raw);
> +		return -1;
> +	}
> +	tmp = strchr(raw, '[');
> +	if (tmp != NULL && *tmp == '[') {
> +		/* check for valid ipv6 address */
> +		tmp1 = strchr(tmp, ']');
> +		if (tmp1 == NULL) {
> +			printf("\n missing ] in %s\n", raw);
> +			free(raw);
> +			return -1;
> +		}
> +		i = tmp1 - tmp;
> +		/* look for file name */
> +		tmp1 = strchr(tmp, '/');
> +		if (tmp1 == NULL) {
> +			printf("\n missing filename in %s\n", raw);
> +			free(raw);
> +			return -1;
> +		}
> +		tmp[i] = '\0';
> +		/* check for 16 byte ipv6 address */
> +		if (!str_to_ipv6(tmp + 1, (uint8_t *)server_ip)) {
> +			printf("\n wrong format IPV6 address in %s\n", raw);
> +			free(raw);
> +			return -1;;
> +		}
> +		else {
> +			/* found filename */
> +			strcpy(filename, tmp1 + 1);
> +			free(raw);
> +			return 0;
> +		}
> +	}
> +	else {
> +		/* here tftp://hostname/testfile from option request of dhcp */
> +		/* look for dns server name */
> +		tmp1 = strchr(raw, '.');
> +		if (tmp1 == NULL) {
> +			printf("\n missing . seperator in %s\n", raw);
> +			free(raw);
> +			return -1;
> +		}
> +		/* look for domain name beyond dns server name
> +		 * so ignore the current . and look for one more */
> +		tmp = strchr(tmp1 + 1, '.');
> +		if (tmp == NULL) {
> +			printf("\n missing domain in %s\n", raw);
> +			free(raw);
> +			return -1;
> +		}
> +		tmp1 = strchr(tmp1, '/');
> +		if (tmp1 == NULL) {
> +			printf("\n missing filename in %s\n", raw);
> +			free(raw);
> +			return -1;
> +		}
> +		j = tmp1 - (raw + 7);
> +		tmp = raw + 7;
> +		tmp[j] = '\0';
> +		strcpy(domainname, tmp);
> +		if (dns_get_ip(fd, domainname, server_ip6, 6) == 0) {
> +			printf("\n DNS failed for IPV6\n");
> +			return -1;
> +		}
> +		ipv6_to_str(server_ip6, server_ip);
> +
> +		strcpy(filename, tmp1 + 1);
> +		free(raw);
> +		return 0;
> +	}
> +}
>