CODEWITHSUNDEEP
linuxsocketstcppadding
Namitha
Namitha

Reputation: 365

Linux socket transfer is adding extra zero padding

While I am trying to send data from Linux Client to Server over TCP I see extra zeros being added to the data. Can anyone please let me know why am I getting those additional zeroes? Please see below for the data packet format.

#define INT32 int32_t
#define UCHAR unsigned char
#define UINT8 u_int8_t

typedef struct cstruct_t {
    UINT8           typ;
    UINT8           l;
    unsigned char   buf[20];
} cksum_t;

cstruct_t       cs; 
INT32           fnlength;

Upvotes: 0

Views: 404

Answers (2)

Namitha
Namitha

Reputation: 365

Since we dint want to add additional zeroes to make it 4-byte long as mentioned by @Soren we used

#pragma pack(push, 1)

#pragma pack(pop)

This worked perfectly for us.

Upvotes: 0

user207421
user207421

Reputation: 310956

Linux socket transfer is adding extra zero padding

No it certainly is not. You probably aren't reading it correctly. London to a brick you are ignoring the value returned by recv().

But you shouldn't be using a struct as a network protocol in the first place.

Upvotes: 2

Related Questions